ParallaxExample()
: prog(make_prog())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, camera_position(prog, "CameraPosition")
, light_position(prog, "LightPosition")
, shape(
List("Position")("TexCoord").Get(),
shapes::Plane(
Vec3f(),
Vec3f(1.0f, 0.0f, 0.0f),
Vec3f(0.0f, 0.0f, -1.0f),
32,
32)) {
shape.UseInProgram(prog);
auto tex_image = images::LoadTexture("stones_color_hmap");
Texture::Active(0);
try {
UniformSampler(prog, "ColorMap").Set(0);
gl.Bound(Texture::Target::_2D, color_tex)
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::Repeat)
.WrapT(TextureWrap::Repeat)
.Image2D(tex_image)
.GenerateMipmap();
} catch(Error&) {
}
Texture::Active(1);
try {
UniformSampler(prog, "BumpMap").Set(1);
gl.Bound(Texture::Target::_2D, bump_tex)
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::Repeat)
.WrapT(TextureWrap::Repeat)
.Image2D(
images::NormalMap(tex_image, images::NormalMap::FromAlpha()))
.GenerateMipmap();
} catch(Error&) {
}
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
(Capability::DepthTest) << true;
(Capability::CullFace) << false;
(Functionality::ClipDistance | 0) << true;
(Functionality::ClipDistance | 1) << true;
(Functionality::ClipDistance | 2) << true;
}
ParallaxMapExample()
: prog(make())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
, camera_position(prog, "CameraPosition")
, light_position(prog, "LightPosition")
, shape(
List("Position")("Normal")("Tangent")("TexCoord").Get(),
shapes::Torus(1.0f, 0.5, 72, 48)) {
shape.UseInProgram(prog);
auto tex_image = images::LoadTexture("bricks_color_hmap");
Texture::Active(0);
try {
UniformSampler(prog, "ColorMap").Set(0);
gl.Bound(Texture::Target::_2D, color_tex)
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::Repeat)
.WrapT(TextureWrap::Repeat)
.Image2D(tex_image)
.GenerateMipmap();
} catch(Error&) {
}
Texture::Active(1);
try {
UniformSampler(prog, "BumpMap").Set(1);
gl.Bound(Texture::Target::_2D, bump_tex)
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::Repeat)
.WrapT(TextureWrap::Repeat)
.Image2D(
images::NormalMap(tex_image, images::NormalMap::FromAlpha()))
.GenerateMipmap();
} catch(Error&) {
}
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Disable(Capability::CullFace);
gl.Enable(Functionality::ClipDistance, 0);
gl.Enable(Functionality::ClipDistance, 1);
gl.Enable(Functionality::ClipDistance, 2);
}
TexProgram(void)
: Program(make())
, offset(self(), "Offset")
, scale(self(), "Scale")
{
UniformSampler(self(), "Tex").Set(0);
}
ObjMeshExample(void)
: gl()
, objects(load_objects())
, depth_prog()
, draw_prog()
, depth_vao(objects.VAOForProgram(depth_prog))
, draw_vao(objects.VAOForProgram(draw_prog))
{
UniformSampler(draw_prog, "DepthTex").Set(0);
Texture::Active(0);
depth_tex.Bind(Texture::Target::Rectangle);
gl.ClearColor(0.8f, 0.8f, 0.7f, 0.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
}
FBTexExample(void)
: gl()
, vertex_shader(ObjectDesc("Vertex"))
, prog(make_prog())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
, cube(List("Position")("Normal")("TexCoord").Get(), shapes::Cube(), prog)
, width(800)
, height(600)
{
UniformSampler(prog, "TexUnit").Set(0);
Uniform<Vec3f>(prog, "LightPos").Set(40.0f, 40.0f, -80.0f);
Texture::Active(0);
tex.Bind(Texture::Target::_2D);
Use();
}
void SetupLightMask(void)
{
Texture::Active(light_tex_unit);
Texture::Target tex_tgt = Texture::Target::Rectangle;
light_mask.Bind(tex_tgt);
draw_prog.Use();
UniformSampler(draw_prog, "LightMap").Set(GLuint(light_tex_unit));
Texture::MinFilter(tex_tgt, TextureMinFilter::Linear);
Texture::MagFilter(tex_tgt, TextureMagFilter::Linear);
Texture::WrapS(tex_tgt, TextureWrap::ClampToEdge);
Texture::WrapT(tex_tgt, TextureWrap::ClampToEdge);
Framebuffer::Target fbo_tgt = Framebuffer::Target::Draw;
light_fbo.Bind(fbo_tgt);
Framebuffer::AttachTexture(fbo_tgt, FramebufferAttachment::Color, light_mask, 0);
Renderbuffer::Target rbo_tgt = Renderbuffer::Target::Renderbuffer;
light_rbo.Bind(rbo_tgt);
Framebuffer::AttachRenderbuffer(fbo_tgt, FramebufferAttachment::Depth, light_rbo);
}
CubeExample(void)
: cube_instr(make_cube.Instructions())
, cube_indices(make_cube.Indices())
, light_pos(prog, "LightPos")
, projection_matrix(prog, "ProjectionMatrix")
, tex_projection_matrix(prog, "TexProjectionMatrix")
, model_matrix(prog, "ModelMatrix")
{
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"uniform mat4 TexProjectionMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertNormal;"
"out vec3 vertLight;"
"out vec4 vertTexCoord;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" vertNormal = ("
" ModelMatrix *"
" vec4(-Normal, 0.0)"
" ).xyz;"
" vertLight = ("
" vec4(LightPos, 0.0)-"
" ModelMatrix * Position"
" ).xyz;"
" vertTexCoord = "
" TexProjectionMatrix *"
" ModelMatrix *"
" Position;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" ModelMatrix *"
" Position;"
"}"
);
// compile it
vs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"uniform sampler2D TexUnit;"
"in vec3 vertNormal;"
"in vec3 vertLight;"
"in vec4 vertTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = length(vertLight);"
" float d = l != 0.0 ? dot("
" vertNormal, "
" normalize(vertLight)"
" ) / l : 0.0;"
" float i = 0.1 + 4.2*max(d, 0.0);"
" vec2 coord = vertTexCoord.st/vertTexCoord.q;"
" vec4 t = texture(TexUnit, coord*0.5 + 0.5);"
" fragColor = vec4(t.rgb*i*sqrt(1.0-t.a), 1.0);"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the cube
cube.Bind();
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// setup the texture
gl.Direct(Texture::Target::_2D, tex)
.Image2D(images::LoadTexture("flower_glass"))
.GenerateMipmap()
.BorderColor(Vec4f(1.0f, 1.0f, 1.0f, 0.0f))
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::ClampToBorder)
.WrapT(TextureWrap::ClampToBorder)
.Bind();
UniformSampler(prog, "TexUnit").Set(0);
Uniform<Mat4f>(prog, "CameraMatrix").Set(
CamMatrixf::LookingAt(Vec3f(0.0f, 1.0f, 2.0f), Vec3f())
);
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_cube.FaceWinding());
}
Test01(void)
{
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 projectionMatrix, cameraMatrix, modelMatrix;"
"in vec4 vertex;"
"in vec3 normal;"
"in vec3 tangent;"
"in vec2 texcoord;"
"out vec3 fragLight;"
"out vec2 fragTex;"
"out mat3 normalMatrix;"
"uniform vec3 lightPos;"
"void main(void)"
"{"
" vec3 fragNormal = ("
" modelMatrix *"
" vec4(normal, 0.0)"
" ).xyz;"
" vec3 fragTangent = ("
" modelMatrix *"
" vec4(tangent, 0.0)"
" ).xyz;"
" normalMatrix[0] = fragTangent;"
" normalMatrix[1] = cross(fragNormal, fragTangent);"
" normalMatrix[2] = fragNormal;"
" fragLight = ("
" vec4(lightPos, 0.0)-"
" modelMatrix*vertex"
" ).xyz;"
" fragTex = texcoord;"
" gl_Position = "
" projectionMatrix *"
" cameraMatrix *"
" modelMatrix *"
" vertex;"
"}"
);
// compile it
vs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"uniform sampler2D colorTex, normalTex;"
"in vec3 fragLight;"
"in vec2 fragTex;"
"in mat3 normalMatrix;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float s = 5.0;"
" float l = length(fragLight);"
" vec3 n = texture2D(normalTex, fragTex*s).xyz;"
" vec3 finalNormal = normalMatrix * n;"
" float d = (l != 0.0)?"
" dot(fragLight, finalNormal)/l:"
" 0.0;"
" float i = 0.1 + 2.5*clamp(d, 0.0, 1.0);"
" vec4 t = texture2D(colorTex, fragTex*s);"
" fragColor = vec4(t.rgb*i, 1.0);"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the shape
vao.Bind();
{
std::vector<GLfloat> data;
GLuint n_per_vertex = shape.Positions(data);
Bind(verts, Buffer::Target::Array).Data(data);
// setup the vertex attribs array for the vertices
VertexAttribArray attr(prog, "vertex");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
{
std::vector<GLfloat> data;
GLuint n_per_vertex = shape.Normals(data);
Bind(normals, Buffer::Target::Array).Data(data);
// setup the vertex attribs array for the normals
VertexAttribArray attr(prog, "normal");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
{
std::vector<GLfloat> data;
GLuint n_per_vertex = shape.Tangents(data);
Bind(tangents, Buffer::Target::Array).Data(data);
VertexAttribArray attr(prog, "tangent");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
// bind the VBO for the shape tex-coords
{
std::vector<GLfloat> data;
GLuint n_per_vertex = shape.TexCoordinates(data);
Bind(texcoords, Buffer::Target::Array).Data(data);
//
VertexAttribArray attr(prog, "texcoord");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
// setup the textures
{
Texture::Active(0);
UniformSampler(prog, "colorTex").Set(0);
auto bound_tex = Bind(color_tex, Texture::Target::_2D);
bound_tex.Image2D(images::LoadTexture("stones"));
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::Repeat);
bound_tex.WrapT(TextureWrap::Repeat);
}
{
Texture::Active(1);
UniformSampler(prog, "normalTex").Set(1);
auto bound_tex = Bind(normal_tex, Texture::Target::_2D);
bound_tex.Image2D(
images::NormalMap(images::LoadTexture("stones-hmap"))
);
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::Repeat);
bound_tex.WrapT(TextureWrap::Repeat);
}
Uniform<Mat4f>(prog, "projectionMatrix").Set(
CamMatrixf::Perspective(Degrees(24), 1.25, 1, 100)
);
//
VertexArray::Unbind();
gl.ClearColor(0.3f, 0.3f, 0.3f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
//
gl.FrontFace(shape.FaceWinding());
gl.CullFace(Face::Back);
gl.Enable(Capability::CullFace);
}
ShadowVolExample(const ExampleParams& params)
: shape_instr(make_shape.Instructions())
, shape_indices(make_shape.Indices())
, shape_vs(ShaderType::Vertex, ObjectDesc("Shape vertex"))
, depth_vs(ShaderType::Vertex, ObjectDesc("Depth vertex"))
, light_vs(ShaderType::Vertex, ObjectDesc("Light vertex"))
, depth_gs(ShaderType::Geometry, ObjectDesc("Depth geometry"))
, light_gs(ShaderType::Geometry, ObjectDesc("Light geometry"))
, shape_fs(ShaderType::Fragment, ObjectDesc("Shape fragment"))
, depth_fs(ShaderType::Fragment, ObjectDesc("Depthfragment"))
, light_fs(ShaderType::Fragment, ObjectDesc("Light fragment"))
, shape_prog(ObjectDesc("Shape"))
, depth_prog(ObjectDesc("Depth"))
, light_prog(ObjectDesc("Light"))
, tex_side(128)
, sample_count(params.HighQuality()?1024:128)
{
shape_vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"in vec2 TexCoord;"
"out vec3 vertNormal;"
"out vec3 vertLightDir;"
"out vec3 vertLightRefl;"
"out vec3 vertViewDir;"
"out vec3 vertViewRefl;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertLightDir = LightPos - gl_Position.xyz;"
" vertLightRefl = reflect("
" -normalize(vertLightDir),"
" normalize(vertNormal)"
" );"
" vertViewDir = (vec4(0.0, 0.0, 1.0, 1.0)* CameraMatrix).xyz;"
" vertViewRefl = reflect("
" normalize(vertViewDir),"
" normalize(vertNormal)"
" );"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
shape_vs.Compile();
shape_fs.Source(
"#version 330\n"
"in vec3 vertNormal;"
"in vec3 vertLightDir;"
"in vec3 vertLightRefl;"
"in vec3 vertViewDir;"
"in vec3 vertViewRefl;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = length(vertLightDir);"
" float d = dot("
" normalize(vertNormal), "
" normalize(vertLightDir)"
" ) / l;"
" float s = dot("
" normalize(vertLightRefl),"
" normalize(vertViewDir)"
" );"
" vec3 ambi = vec3(0.6, 0.3, 0.5);"
" vec3 diff = vec3(0.9, 0.7, 0.8);"
" vec3 spec = vec3(1.0, 0.9, 0.95);"
" fragColor = vec4("
" ambi * 0.3 + "
" diff * 0.7 * max(d, 0.0) + "
" spec * pow(max(s, 0.0), 64), "
" 1.0"
" );"
"}"
);
shape_fs.Compile();
shape_prog.AttachShader(shape_vs);
shape_prog.AttachShader(shape_fs);
shape_prog.Link();
depth_vs.Source(
"#version 330\n"
"uniform mat4 ModelMatrix;"
"uniform vec3 LightPos;"
"in vec4 Position;"
"void main(void)"
"{"
" gl_Position = "
" mat4("
" 1.0, 0.0, 0.0, -LightPos.x,"
" 0.0, 1.0, 0.0, -LightPos.y,"
" 0.0, 0.0, 1.0, -LightPos.z,"
" 0.0, 0.0, 0.0, 1.0"
" )*"
" ModelMatrix *"
" mat4("
" 10.0, 0.0, 0.0, 0.0,"
" 0.0, 10.0, 0.0, 0.0,"
" 0.0, 0.0, 10.0, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" )*"
" Position;"
"}"
);
depth_vs.Compile();
depth_gs.Source(
"#version 330\n"
"layout(triangles) in;"
"layout(triangle_strip, max_vertices = 18) out;"
"uniform mat4 ProjectionMatrix;"
"const mat4 CubeFaceMatrix[6] = mat4[6]("
" mat4("
" 0.0, 0.0, -1.0, 0.0,"
" 0.0, -1.0, 0.0, 0.0,"
" -1.0, 0.0, 0.0, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" ), mat4("
" 0.0, 0.0, 1.0, 0.0,"
" 0.0, -1.0, 0.0, 0.0,"
" 1.0, 0.0, 0.0, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" ), mat4("
" 1.0, 0.0, 0.0, 0.0,"
" 0.0, 0.0, -1.0, 0.0,"
" 0.0, 1.0, 0.0, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" ), mat4("
" 1.0, 0.0, 0.0, 0.0,"
" 0.0, 0.0, 1.0, 0.0,"
" 0.0, -1.0, 0.0, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" ), mat4("
" 1.0, 0.0, 0.0, 0.0,"
" 0.0, -1.0, 0.0, 0.0,"
" 0.0, 0.0, -1.0, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" ), mat4("
" -1.0, 0.0, 0.0, 0.0,"
" 0.0, -1.0, 0.0, 0.0,"
" 0.0, 0.0, 1.0, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" )"
");"
"void main(void)"
"{"
" for(gl_Layer=0; gl_Layer!=6; ++gl_Layer)"
" {"
" for(int i=0; i!=3; ++i)"
" {"
" gl_Position = "
" ProjectionMatrix *"
" CubeFaceMatrix[gl_Layer]*"
" gl_in[i].gl_Position;"
" EmitVertex();"
" }"
" EndPrimitive();"
" }"
"}"
);
depth_gs.Compile();
depth_fs.Source(
"#version 330\n"
"void main(void)"
"{"
" gl_FragDepth = gl_FragCoord.z;"
"}"
);
depth_fs.Compile();
depth_prog.AttachShader(depth_vs);
depth_prog.AttachShader(depth_gs);
depth_prog.AttachShader(depth_fs);
depth_prog.Link();
depth_prog.Use();
Uniform<Mat4f>(depth_prog, "ProjectionMatrix").Set(
CamMatrixf::PerspectiveX(
RightAngles(1.0),
1.0,
0.1,
10.0
)
);
// bind the VAO for the shape
shape.Bind();
shape_positions.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribSlot location;
if(VertexAttribArray::QueryCommonLocation(
"Position",
location,
shape_prog,
depth_prog
))
{
VertexAttribArray shape_attr(location);
shape_attr.Setup(n_per_vertex, DataType::Float);
shape_attr.Enable();
}
else assert(!"Inconsistent 'Position' location");
}
shape_normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
shape_prog.Use();
VertexAttribArray attr(shape_prog, "Normal");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
light_vs.Source(
"#version 330\n"
"in vec3 Position;"
"out float vertZOffs;"
"uniform vec3 LightPos;"
"uniform int SampleCount;"
"void main(void)"
"{"
" float hp = (SampleCount-1) * 0.5;"
" vertZOffs = (gl_InstanceID - hp)/hp;"
" gl_Position = vec4(Position + LightPos, 1.0);"
"}"
);
light_vs.Compile();
light_gs.Source(
"#version 330\n"
"layout(points) in;"
"layout(triangle_strip, max_vertices = 4) out;"
"in float vertZOffs[];"
"out vec4 geomPosition;"
"uniform mat4 CameraMatrix, ProjectionMatrix;"
"uniform vec3 ViewX, ViewY, ViewZ;"
"uniform float LightVolSize;"
"void main(void)"
"{"
" float zo = vertZOffs[0];"
" float yo[2] = float[2](-1.0, 1.0);"
" float xo[2] = float[2](-1.0, 1.0);"
" for(int j=0;j!=2;++j)"
" for(int i=0;i!=2;++i)"
" {"
" geomPosition = vec4("
" gl_in[0].gl_Position.xyz+"
" ViewX * xo[i] * LightVolSize+"
" ViewY * yo[j] * LightVolSize+"
" ViewZ * zo * LightVolSize,"
" 1.0"
" );"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" geomPosition;"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
);
light_gs.Compile();
light_fs.Source(
"#version 330\n"
"in vec4 geomPosition;"
"out vec4 fragColor;"
"uniform samplerCubeShadow ShadowMap;"
"uniform int SampleCount;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" vec3 LightDir = geomPosition.xyz - LightPos;"
" vec4 ShadowCoord = vec4("
" normalize(LightDir),"
" length(LightDir)"
" );"
" float s = texture(ShadowMap, ShadowCoord);"
" float alpha = s / (SampleCount * pow(length(LightDir), 2));"
" fragColor = vec4(1.0, 1.0, 1.0, alpha);"
"}"
);
light_fs.Compile();
light_prog.AttachShader(light_vs);
light_prog.AttachShader(light_gs);
light_prog.AttachShader(light_fs);
light_prog.Link();
light_prog.Use();
// bind the VAO for the light volume
light.Bind();
// bind the VBO for the light volume plane positions
light_positions.Bind(Buffer::Target::Array);
{
GLfloat position[3] = {0.0, 0.0, 0.0};
Buffer::Data(Buffer::Target::Array, 3, position);
VertexAttribArray attr(light_prog, "Position");
attr.Setup(3, DataType::Float);
attr.Enable();
}
Uniform<GLint>(light_prog, "SampleCount").Set(sample_count);
Uniform<GLfloat>(light_prog, "LightVolSize").Set(4);
UniformSampler(light_prog, "ShadowMap").Set(0);
// Setup the texture and the offscreen FBO
Texture::Active(0);
{
auto bound_tex = Bind(depth_tex, Texture::Target::CubeMap);
bound_tex.MinFilter(TextureMinFilter::Linear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::ClampToEdge);
bound_tex.WrapT(TextureWrap::ClampToEdge);
bound_tex.WrapR(TextureWrap::ClampToEdge);
bound_tex.CompareFunc(CompareFunction::LEqual);
bound_tex.CompareMode(
TextureCompareMode::CompareRefToTexture
);
for(int i=0; i!=6; ++i)
{
Texture::Image2D(
Texture::CubeMapFace(i),
0,
PixelDataInternalFormat::DepthComponent,
tex_side, tex_side,
0,
PixelDataFormat::DepthComponent,
PixelDataType::Float,
nullptr
);
}
auto bound_fbo = Bind(
depth_fbo,
Framebuffer::Target::Draw
);
bound_fbo.AttachTexture(
FramebufferAttachment::Depth,
depth_tex,
0
);
}
//
gl.ClearColor(0.2f, 0.05f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_shape.FaceWinding());
gl.CullFace(Face::Back);
gl.BlendFunc(BlendFunction::SrcAlpha, BlendFunction::One);
}
FBTexExample(void)
: make_cube()
, cube_instr(make_cube.Instructions())
, cube_indices(make_cube.Indices())
, make_torus(1.0, 0.5, 72, 48)
, torus_instr(make_torus.Instructions())
, torus_indices(make_torus.Indices())
, cube_fs(ObjectDesc("Cube fragment"))
, torus_fs(ObjectDesc("Torus fragment"))
, torus_projection_matrix(torus_prog, "ProjectionMatrix")
, torus_camera_matrix(torus_prog, "CameraMatrix")
, torus_model_matrix(torus_prog, "ModelMatrix")
, cube_projection_matrix(cube_prog, "ProjectionMatrix")
, cube_camera_matrix(cube_prog, "CameraMatrix")
, cube_model_matrix(cube_prog, "ModelMatrix")
, tex_side(512)
, width(tex_side)
, height(tex_side)
{
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"in vec2 TexCoord;"
"out vec3 vertNormal;"
"out vec3 vertLight;"
"out vec2 vertTexCoord;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" vertNormal = mat3(ModelMatrix)*Normal;"
" gl_Position = ModelMatrix * Position;"
" vertLight = LightPos-gl_Position.xyz;"
" vertTexCoord = TexCoord;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
vs.Compile();
cube_fs.Source(
"#version 330\n"
"uniform sampler2D TexUnit;"
"in vec3 vertNormal;"
"in vec3 vertLight;"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = sqrt(length(vertLight));"
" float d = l > 0? dot(vertNormal, normalize(vertLight)) / l : 0.0;"
" float i = 0.6 + max(d, 0.0);"
" fragColor = texture(TexUnit, vertTexCoord)*i;"
"}"
);
cube_fs.Compile();
cube_prog.AttachShader(vs);
cube_prog.AttachShader(cube_fs);
cube_prog.Link();
cube_prog.Use();
cube.Bind();
cube_verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(cube_prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
cube_normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(cube_prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
cube_texcoords.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.TexCoordinates(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(cube_prog, "TexCoord");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
UniformSampler(cube_prog, "TexUnit").Set(0);
Uniform<Vec3f>(cube_prog, "LightPos").Set(4.0f, 4.0f, -8.0f);
torus_fs.Source(
"#version 330\n"
"in vec3 vertNormal;"
"in vec3 vertLight;"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float d = dot("
" vertNormal, "
" normalize(vertLight)"
" );"
" float i = ("
" int(vertTexCoord.x*18) % 2+"
" int(vertTexCoord.y*14) % 2"
" ) % 2;"
" float c = (0.4 + max(d, 0.0))*(1-i/2);"
" fragColor = vec4(c, c, c, 1.0);"
"}"
);
torus_fs.Compile();
torus_prog.AttachShader(vs);
torus_prog.AttachShader(torus_fs);
torus_prog.Link();
torus_prog.Use();
torus.Bind();
torus_verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(torus_prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
torus_normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(torus_prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
torus_texcoords.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.TexCoordinates(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(torus_prog, "TexCoord");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
Uniform<Vec3f>(torus_prog, "LightPos").Set(2.0f, 3.0f, 4.0f);
{
auto bound_tex = Bind(tex, Texture::Target::_2D);
bound_tex.Image2D(
0,
PixelDataInternalFormat::RGBA,
tex_side, tex_side,
0,
PixelDataFormat::RGBA,
PixelDataType::UnsignedByte,
nullptr
);
bound_tex.MinFilter(TextureMinFilter::Linear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::Repeat);
bound_tex.WrapT(TextureWrap::Repeat);
}
{
auto bound_fbo = Bind(
fbo,
Framebuffer::Target::Draw
);
auto bound_rbo = Bind(
rbo,
Renderbuffer::Target::Renderbuffer
);
bound_rbo.Storage(
PixelDataInternalFormat::DepthComponent,
tex_side,
tex_side
);
bound_fbo.AttachTexture(
FramebufferAttachment::Color,
tex,
0
);
bound_fbo.AttachRenderbuffer(
FramebufferAttachment::Depth,
rbo
);
}
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.CullFace(Face::Back);
}
GlassExample(void)
: make_plane(Vec3f(2.0f, 0.0f, 0.0f), Vec3f(0.0f, 0.0f, -2.0f))
, plane_instr(make_plane.Instructions())
, plane_indices(make_plane.Indices())
, make_shape()
, shape_instr(make_shape.Instructions())
, shape_indices(make_shape.Indices())
, plane_vs(ObjectDesc("Plane vertex"))
, shape_vs(ObjectDesc("Shape vertex"))
, plane_fs(ObjectDesc("Plane fragment"))
, shape_fs(ObjectDesc("Shape fragment"))
, plane_proj_matrix(plane_prog)
, plane_camera_matrix(plane_prog)
, plane_model_matrix(plane_prog)
, shape_proj_matrix(shape_prog)
, shape_camera_matrix(shape_prog)
, shape_model_matrix(shape_prog)
, shape_clip_plane(shape_prog)
, shape_clip_direction(shape_prog)
, width(512)
, height(512)
, tex_side(512)
{
plane_vs.Source(
"#version 140\n"
"uniform vec3 LightPosition;"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"in vec2 TexCoord;"
"out vec3 vertLightDir;"
"out vec2 vertTexCoord;"
"void main(void)"
"{"
" gl_Position = "
" ModelMatrix* "
" Position;"
" vertLightDir = normalize("
" LightPosition - gl_Position.xyz"
" );"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" gl_Position;"
" vertTexCoord = TexCoord;"
"}"
);
plane_vs.Compile();
plane_fs.Source(
"#version 140\n"
"uniform vec3 Normal;"
"in vec3 vertLightDir;"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float checker = ("
" int(vertTexCoord.x*18) % 2+"
" int(vertTexCoord.y*18) % 2"
" ) % 2;"
" vec3 color = mix("
" vec3(0.2, 0.4, 0.9),"
" vec3(0.2, 0.2, 0.7),"
" checker"
" );"
" float d = dot("
" Normal, "
" vertLightDir"
" );"
" float intensity = 0.5 + pow(1.4*d, 2.0);"
" fragColor = vec4(color*intensity, 1.0);"
"}"
);
plane_fs.Compile();
plane_prog.AttachShader(plane_vs);
plane_prog.AttachShader(plane_fs);
plane_prog.Link();
plane_prog.Use();
plane_proj_matrix.BindTo("ProjectionMatrix");
plane_camera_matrix.BindTo("CameraMatrix");
plane_model_matrix.BindTo("ModelMatrix");
Vec3f lightPos(3.0f, 3.0f, 3.0f);
Uniform<Vec3f>(plane_prog, "LightPosition").Set(lightPos);
Uniform<Vec3f>(plane_prog, "Normal").Set(make_plane.Normal());
gl.Bind(plane);
gl.Bind(Buffer::Target::Array, plane_verts);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_plane.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(plane_prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
gl.Bind(Buffer::Target::Array, plane_texcoords);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_plane.TexCoordinates(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(plane_prog, "TexCoord");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
shape_vs.Source(
"#version 140\n"
"uniform vec3 LightPosition;"
"uniform mat4 ProjectionMatrix, ModelMatrix, CameraMatrix;"
"uniform vec4 ClipPlane;"
"uniform float ClipDirection;"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertNormal;"
"out vec3 vertLightDir;"
"out vec3 vertLightRefl;"
"out vec3 vertViewDir;"
"out vec2 vertTexCoord;"
"void main(void)"
"{"
" gl_Position = "
" ModelMatrix *"
" Position;"
" gl_ClipDistance[0] = "
" ClipDirection* "
" dot(ClipPlane, gl_Position);"
" vertLightDir = LightPosition - gl_Position.xyz;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertLightRefl = reflect("
" -normalize(vertLightDir),"
" normalize(vertNormal)"
" );"
" vertViewDir = (vec4(0.0, 0.0, 1.0, 1.0)*CameraMatrix).xyz;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
" vec3 TexOffs = mat3(CameraMatrix)*vertNormal*0.05;"
" vertTexCoord = "
" vec2(0.5, 0.5) +"
" (gl_Position.xy/gl_Position.w)*0.5 +"
" (TexOffs.z<0.0 ? TexOffs.xy : -TexOffs.xy);"
"}"
);
shape_vs.Compile();
shape_fs.Source(
"#version 140\n"
"uniform sampler2D RefractTex;"
"in vec3 vertNormal;"
"in vec3 vertLightDir;"
"in vec3 vertLightRefl;"
"in vec3 vertViewDir;"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"float adj_lt(float i)"
"{"
" return i > 0.0 ? i : -0.7*i;"
"}"
"void main(void)"
"{"
" float l = length(vertLightDir);"
" float d = dot("
" normalize(vertNormal), "
" normalize(vertLightDir)"
" ) / l;"
" float s = dot("
" normalize(vertLightRefl),"
" normalize(vertViewDir)"
" );"
" vec3 lt = vec3(1.0, 1.0, 1.0);"
" vec3 tex = texture(RefractTex, vertTexCoord).rgb;"
" fragColor = vec4("
" tex * 0.5 + "
" (lt + tex) * 1.5 * adj_lt(d) + "
" lt * pow(adj_lt(s), 64), "
" 1.0"
" );"
"}"
);
shape_fs.Compile();
shape_prog.AttachShader(shape_vs);
shape_prog.AttachShader(shape_fs);
shape_prog.Link();
shape_prog.Use();
shape_proj_matrix.BindTo("ProjectionMatrix");
shape_camera_matrix.BindTo("CameraMatrix");
shape_model_matrix.BindTo("ModelMatrix");
shape_clip_plane.BindTo("ClipPlane");
shape_clip_direction.BindTo("ClipDirection");
Uniform<Vec3f>(shape_prog, "LightPosition").Set(lightPos);
gl.Bind(shape);
gl.Bind(Buffer::Target::Array, shape_verts);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(shape_prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
gl.Bind(Buffer::Target::Array, shape_normals);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(shape_prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
//
Texture::Active(0);
UniformSampler(shape_prog, "RefractTex").Set(0);
{
gl.Bound(Texture::Target::_2D, refract_tex)
.MinFilter(TextureMinFilter::Linear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::MirroredRepeat)
.WrapT(TextureWrap::MirroredRepeat)
.Image2D(
0,
PixelDataInternalFormat::RGB,
tex_side, tex_side,
0,
PixelDataFormat::RGB,
PixelDataType::UnsignedByte,
nullptr
);
}
//
gl.ClearColor(0.8f, 0.8f, 0.7f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
CubeMapExample(void)
: make_shape(4)
, shape_instr(make_shape.Instructions())
, shape_indices(make_shape.Indices())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
{
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"out vec3 vertNormal;"
"out vec3 vertTexCoord;"
"out vec3 vertLightDir;"
"out vec3 vertViewDir;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" vec3 Normal = Position.xyz;"
" gl_Position = ModelMatrix * Position;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertTexCoord = Normal;"
" vertLightDir = LightPos - gl_Position.xyz;"
" vertViewDir = (vec4(0.0, 0.0, 1.0, 1.0)*CameraMatrix).xyz;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
vs.Compile();
gs.Source(
"#version 330\n"
"layout (triangles) in;"
"layout (triangle_strip, max_vertices = 3) out;"
"in vec3 vertNormal[3];"
"in vec3 vertTexCoord[3];"
"in vec3 vertLightDir[3];"
"in vec3 vertViewDir[3];"
"out vec3 geomNormal;"
"out vec3 geomTexCoord;"
"out vec3 geomLightDir;"
"out vec3 geomLightRefl;"
"out vec3 geomViewDir;"
"void main(void)"
"{"
" vec3 FaceNormal = 0.333333*("
" vertNormal[0]+"
" vertNormal[1]+"
" vertNormal[2] "
" );"
" for(int v=0; v!=3; ++v)"
" {"
" gl_Position = gl_in[v].gl_Position;"
" geomNormal = 0.5*(vertNormal[v]+FaceNormal);"
" geomTexCoord = vertTexCoord[v];"
" geomLightDir = vertLightDir[v];"
" geomLightRefl = reflect("
" -normalize(geomLightDir),"
" normalize(FaceNormal)"
" );"
" geomViewDir = vertViewDir[v];"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
);
gs.Compile();
fs.Source(
"#version 330\n"
"uniform samplerCube TexUnit;"
"in vec3 geomNormal;"
"in vec3 geomTexCoord;"
"in vec3 geomLightDir;"
"in vec3 geomLightRefl;"
"in vec3 geomViewDir;"
"out vec3 fragColor;"
"void main(void)"
"{"
" vec3 lt = vec3(1.0, 1.0, 1.0);"
" vec3 tex = texture(TexUnit, geomTexCoord).rgb;"
" float d = dot("
" normalize(geomNormal), "
" normalize(geomLightDir)"
" );"
" float s = dot("
" normalize(geomLightRefl),"
" normalize(geomViewDir)"
" );"
" float b = 1.0-sqrt(max(dot("
" normalize(geomNormal),"
" normalize(geomViewDir)"
" ), 0.0));"
" float ea = clamp(tex.b*(-d+0.2), 0.0, 1.0);"
" float sr = 1.0-tex.b*0.8;"
" fragColor = "
" tex * (0.3*ea + 0.6*b + 0.8*max(d, 0.0)) + "
" (tex+lt) * 0.8*sr*pow(clamp(s+0.05, 0.0, 1.0), 32);"
"}"
);
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(gs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the shape
shape.Bind();
positions.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// setup the texture
{
auto bound_tex = Bind(tex, Texture::Target::CubeMap);
bound_tex.MinFilter(TextureMinFilter::Linear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::ClampToEdge);
bound_tex.WrapT(TextureWrap::ClampToEdge);
bound_tex.WrapR(TextureWrap::ClampToEdge);
const char* tex_name[6] = {
"cube_0_right",
"cube_1_left",
"cube_2_top",
"cube_3_bottom",
"cube_4_front",
"cube_5_back"
};
for(GLuint i=0; i!=6; ++i)
{
Texture::Image2D(
Texture::CubeMapFace(i),
images::LoadTexture(tex_name[i], false, true)
);
}
}
UniformSampler(prog, "TexUnit").Set(0);
//
Uniform<Vec3f>(prog, "LightPos").Set(Vec3f(3.0f, 5.0f, 4.0f));
//
gl.ClearColor(0.05f, 0.2f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_shape.FaceWinding());
gl.CullFace(Face::Back);
}
void RenderShadowMap(GLuint size)
{
// matrices
auto lt_proj= CamMatrixf::PerspectiveX(Degrees(12), 1.0, 85.0, 110.0);
auto light = CamMatrixf::LookingAt(light_position, Vec3f());
// setup the texture
Texture::Active(shadow_tex_unit);
mask_prog.Use();
Uniform<Mat4f>(mask_prog, "LightMatrix").Set(lt_proj*light);
UniformSampler(mask_prog, "ShadowMap").Set(GLuint(shadow_tex_unit));
draw_prog.Use();
Uniform<Mat4f>(draw_prog, "LightMatrix").Set(lt_proj*light);
UniformSampler(draw_prog, "ShadowMap").Set(GLuint(shadow_tex_unit));
Texture::Target tex_tgt = Texture::Target::_2D;
shadow_map.Bind(tex_tgt);
Texture::MinFilter(tex_tgt, TextureMinFilter::Linear);
Texture::MagFilter(tex_tgt, TextureMagFilter::Linear);
Texture::WrapS(tex_tgt, TextureWrap::ClampToEdge);
Texture::WrapT(tex_tgt, TextureWrap::ClampToEdge);
Texture::CompareMode(tex_tgt, TextureCompareMode::CompareRefToTexture);
Texture::Image2D(
tex_tgt,
0,
PixelDataInternalFormat::DepthComponent32,
size, size,
0,
PixelDataFormat::DepthComponent,
PixelDataType::Float,
nullptr
);
// create shadow program
ShadowProgram shadow_prog(vert_shader);
// VAO for the meshes in shadow program
VertexArray vao = meshes.VAOForProgram(shadow_prog);
vao.Bind();
// FBO for offscreen rendering of the shadow map
Framebuffer::Target fbo_tgt = Framebuffer::Target::Draw;
Framebuffer fbo;
fbo.Bind(fbo_tgt);
Framebuffer::AttachTexture(fbo_tgt, FramebufferAttachment::Depth, shadow_map, 0);
// RBO for offscreen rendering
Renderbuffer::Target rbo_tgt = Renderbuffer::Target::Renderbuffer;
Renderbuffer rbo;
rbo.Bind(rbo_tgt);
Renderbuffer::Storage(rbo_tgt, PixelDataInternalFormat::RGBA, size, size);
Framebuffer::AttachRenderbuffer(fbo_tgt, FramebufferAttachment::Color, rbo);
// setup the matrices
shadow_prog.projection_matrix.Set(lt_proj);
shadow_prog.camera_matrix.Set(light);
// setup and clear the viewport
gl.Viewport(size, size);
gl.Clear().DepthBuffer();
// draw the meshes
gl.PolygonOffset(1.0, 1.0);
gl.Enable(Capability::PolygonOffsetFill);
meshes.Draw();
gl.Disable(Capability::PolygonOffsetFill);
gl.Finish();
// bind the default framebuffer
DefaultFramebuffer().Bind(Framebuffer::Target::Draw);
}
CubeExample(void)
: cube_instr(make_cube.Instructions())
, cube_indices(make_cube.Indices())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
{
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"in vec2 TexCoord;"
"out vec3 vertNormal;"
"out vec3 vertLight;"
"out vec2 vertTexCoord;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" vertNormal = mat3(ModelMatrix)*Normal;"
" gl_Position = ModelMatrix * Position;"
" vertLight = LightPos - gl_Position.xyz;"
" vertTexCoord = TexCoord * 6.0;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
// compile it
vs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"uniform sampler2D TexUnit;"
"in vec3 vertNormal;"
"in vec3 vertLight;"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = dot(vertLight, vertLight);"
" float d = l != 0.0 ? dot("
" vertNormal, "
" normalize(vertLight)"
" ) / l : 0.0;"
" vec3 c = vec3(0.9, 0.8, 0.2);"
" vec4 t = texture(TexUnit, vertTexCoord);"
" float a = 1.0 - sqrt(abs(d)), e;"
" if(gl_FrontFacing)"
" {"
" e = d >= 0.0 ?"
" d * mix(0.5, 1.0, t.a):"
" (-0.9*d) * (1.0 - t.a);"
" }"
" else"
" {"
" e = d >= 0.0 ?"
" (0.6*d) * (1.0 - t.a):"
" (-0.7*d) * mix(0.5, 1.0, t.a);"
" }"
" float i = 0.1 + 9.0*e;"
" fragColor = vec4("
" t.r*c.r*i, "
" t.g*c.g*i, "
" t.b*c.b*i, "
" clamp(pow(t.a,2) + a*0.4, 0.0, 1.0)"
" );"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the cube
cube.Bind();
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(prog, "Position");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(prog, "Normal");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
texcoords.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.TexCoordinates(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(prog, "TexCoord");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
// setup the texture
{
auto bound_tex = Bind(tex, Texture::Target::_2D);
bound_tex.Image2D(images::LoadTexture("honeycomb"));
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::MirroredRepeat);
bound_tex.WrapT(TextureWrap::MirroredRepeat);
}
//
UniformSampler(prog, "TexUnit").Set(0);
Uniform<Vec3f>(prog, "LightPos").Set(Vec3f(1.0f, 2.0f, 3.0f));
//
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::Blend);
gl.BlendFunc(
BlendFn::SrcAlpha,
BlendFn::OneMinusSrcAlpha
);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_cube.FaceWinding());
}
DOFExample(const ExampleParams& params)
: face_instr(make_cube.Instructions())
, edge_instr(make_cube.EdgeInstructions())
, face_indices(make_cube.Indices())
, edge_indices(make_cube.EdgeIndices())
, cube_matrices(MakeCubeMatrices(100, 10.0))
, viewport_width(dof_prog, "ViewportWidth")
, viewport_height(dof_prog, "ViewportHeight")
, projection_matrix(main_prog, "ProjectionMatrix")
, camera_matrix(main_prog, "CameraMatrix")
, model_matrix(main_prog, "ModelMatrix")
, ambient_color(main_prog, "AmbientColor")
, diffuse_color(main_prog, "DiffuseColor")
, focus_depth(dof_prog, "FocusDepth")
, color_tex(Texture::Target::Rectangle)
, depth_tex(Texture::Target::Rectangle)
, width(800)
, height(600)
{
main_vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"uniform vec3 LightPos;"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertLightDir;"
"out vec3 vertNormal;"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" vertLightDir = normalize(LightPos - gl_Position.xyz);"
" vertNormal = normalize(mat3(ModelMatrix)*Normal);"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
// compile it
main_vs.Compile();
// set the fragment shader source
main_fs.Source(
"#version 330\n"
"uniform vec3 AmbientColor, DiffuseColor;"
"in vec3 vertLightDir;"
"in vec3 vertNormal;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float d = max(dot(vertLightDir,vertNormal),0.0);"
" float e = sin("
" 10.0*vertLightDir.x + "
" 20.0*vertLightDir.y + "
" 25.0*vertLightDir.z "
" )*0.9;"
" fragColor = vec4("
" mix(AmbientColor, DiffuseColor, d+e),"
" 1.0"
" );"
"}"
);
// compile it
main_fs.Compile();
// attach the shaders to the program
main_prog.AttachShader(main_vs);
main_prog.AttachShader(main_fs);
// link and use it
main_prog.Link();
main_prog.Use();
// bind the VAO for the cube
cube.Bind();
// bind the VBO for the cube vertices
positions.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Positions(data);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
// setup the vertex attribs array for the vertices
VertexAttribArray attr(main_prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// bind the VBO for the cube normals
normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(main_prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
Uniform<Vec3f>(main_prog, "LightPos").Set(30.0, 50.0, 20.0);
dof_vs.Source(
"#version 330\n"
"uniform uint ViewportWidth, ViewportHeight;"
"in vec4 Position;"
"out vec2 vertTexCoord;"
"void main(void)"
"{"
" gl_Position = Position;"
" vertTexCoord = vec2("
" (Position.x*0.5 + 0.5)*ViewportWidth,"
" (Position.y*0.5 + 0.5)*ViewportHeight"
" );"
"}"
);
dof_vs.Compile();
dof_fs.Source(
"#version 330\n"
"uniform sampler2DRect ColorTex;"
"uniform sampler2DRect DepthTex;"
"uniform float FocusDepth;"
"uniform uint SampleMult;"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"const float strength = 16.0;"
"void main(void)"
"{"
" float fragDepth = texture(DepthTex, vertTexCoord).r;"
" vec3 color = texture(ColorTex, vertTexCoord).rgb;"
" float of = abs(fragDepth - FocusDepth);"
" int nsam = int(of*SampleMult);"
" float inv_nsam = 1.0 / (1.0 + nsam);"
" float astep = (3.14151*4.0)/nsam;"
" for(int i=0; i!=nsam; ++i)"
" {"
" float a = i*astep;"
" float d = sqrt(i*inv_nsam);"
" float sx = cos(a)*of*strength*d;"
" float sy = sin(a)*of*strength*d;"
" vec2 samTexCoord = vertTexCoord + vec2(sx, sy) + noise2(vec2(sx, sy));"
" color += texture(ColorTex, samTexCoord).rgb;"
" }"
" fragColor = vec4(color * inv_nsam , 1.0);"
"}"
);
dof_fs.Compile();
dof_prog.AttachShader(dof_vs);
dof_prog.AttachShader(dof_fs);
dof_prog.Link();
dof_prog.Use();
GLuint sample_mult = params.HighQuality()?512:128;
Uniform<GLuint>(dof_prog, "SampleMult") = sample_mult;
// bind the VAO for the screen
screen.Bind();
corners.Bind(Buffer::Target::Array);
{
GLfloat screen_verts[8] = {
-1.0f, -1.0f,
-1.0f, 1.0f,
1.0f, -1.0f,
1.0f, 1.0f
};
Buffer::Data(Buffer::Target::Array, 8, screen_verts);
VertexAttribArray attr(dof_prog, "Position");
attr.Setup<Vec2f>();
attr.Enable();
}
Texture::Active(0);
UniformSampler(dof_prog, "ColorTex").Set(0);
{
auto bound_tex = Bind(color_tex, Texture::Target::Rectangle);
bound_tex.MinFilter(TextureMinFilter::Linear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::ClampToEdge);
bound_tex.WrapT(TextureWrap::ClampToEdge);
bound_tex.Image2D(
0,
PixelDataInternalFormat::RGB,
width, height,
0,
PixelDataFormat::RGB,
PixelDataType::UnsignedByte,
nullptr
);
}
Texture::Active(1);
UniformSampler(dof_prog, "DepthTex").Set(1);
{
auto bound_tex = Bind(depth_tex, Texture::Target::Rectangle);
bound_tex.MinFilter(TextureMinFilter::Linear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::ClampToEdge);
bound_tex.WrapT(TextureWrap::ClampToEdge);
bound_tex.Image2D(
0,
PixelDataInternalFormat::DepthComponent,
width, height,
0,
PixelDataFormat::DepthComponent,
PixelDataType::Float,
nullptr
);
}
{
auto bound_fbo = Bind(
fbo,
Framebuffer::Target::Draw
);
bound_fbo.AttachTexture(
FramebufferAttachment::Color,
color_tex,
0
);
bound_fbo.AttachTexture(
FramebufferAttachment::Depth,
depth_tex,
0
);
}
//
gl.ClearColor(0.9f, 0.9f, 0.9f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.DepthFunc(CompareFn::LEqual);
gl.Enable(Capability::LineSmooth);
gl.BlendFunc(BlendFn::SrcAlpha, BlendFn::OneMinusSrcAlpha);
}
CubeExample(void)
: cube_instr(make_cube.Instructions())
, cube_indices(make_cube.Indices())
, prog(make_prog())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
{
// bind the VAO for the cube
gl.Bind(cube);
gl.Bind(Buffer::Target::Array, verts);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
gl.Bind(Buffer::Target::Array, normals);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
gl.Bind(Buffer::Target::Array, texcoords);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.TexCoordinates(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(prog, "TexCoord");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// setup the texture
gl.Bound(Texture::Target::_2D, tex)
.Image2D(images::LoadTexture("honeycomb"))
.GenerateMipmap()
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::MirroredRepeat)
.WrapT(TextureWrap::MirroredRepeat)
.Anisotropy(2);
//
UniformSampler(prog, "TexUnit").Set(0);
Uniform<Vec3f>(prog, "LightPos").Set(Vec3f(1.0f, 2.0f, 3.0f));
//
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::Blend);
gl.BlendFunc(
BlendFn::SrcAlpha,
BlendFn::OneMinusSrcAlpha
);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_cube.FaceWinding());
}
PoolTilesExample(void)
: make_plane(
Vec3f(),
Vec3f(7.0f, 0.0f, 0.0f),
Vec3f(0.0f, 0.0f,-7.0f),
48,
48
), plane_instr(make_plane.Instructions())
, plane_indices(make_plane.Indices())
, make_shape()
, shape_instr(make_shape.Instructions())
, shape_indices(make_shape.Indices())
, plane_vs(ObjectDesc("Plane vertex"))
, shape_vs(ObjectDesc("Shape vertex"))
, plane_fs(ObjectDesc("Plane fragment"))
, shape_fs(ObjectDesc("Shape fragment"))
, plane_camera_matrix(plane_prog, "CameraMatrix")
, shape_camera_matrix(shape_prog, "CameraMatrix")
, plane_camera_position(plane_prog, "CameraPosition")
, width(800)
, height(600)
, refl_tex_side(width > height ? height : width)
, tile_tex_side(64)
{
gl.RequireAtLeast(LimitQuery::MaxCombinedTextureImageUnits, 5);
plane_vs.Source(
"#version 140\n"
"uniform vec3 LightPosition;"
"uniform vec3 CameraPosition;"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"in vec2 TexCoord;"
"out vec3 vertLightDir;"
"out vec3 vertViewDir;"
"out vec4 vertReflTexCoord;"
"out vec2 vertTileTexCoord;"
"void main(void)"
"{"
" gl_Position = ModelMatrix* Position;"
" vertLightDir = normalize(LightPosition - gl_Position.xyz);"
" vertViewDir = normalize(CameraPosition - gl_Position.xyz);"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
" vertReflTexCoord = gl_Position;"
" vertTileTexCoord = TexCoord;"
"}"
);
plane_vs.Compile();
plane_fs.Source(
"#version 140\n"
"uniform sampler2D RandTex, PictTex, TileTex, NormTex;"
"uniform sampler2D ReflectTex;"
"uniform uint TileCount;"
"uniform float Aspect;"
"in vec3 vertLightDir;"
"in vec3 vertViewDir;"
"in vec4 vertReflTexCoord;"
"in vec2 vertTileTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" vec3 Normal = texture("
" NormTex, "
" vertTileTexCoord * TileCount"
" ).rgb;"
" vec3 LightRefl = reflect("
" -normalize(vertLightDir),"
" normalize(Normal)"
" );"
" float Diffuse = max(dot("
" Normal, "
" vertLightDir"
" ), 0.0);"
" float Specular = max(dot("
" LightRefl,"
" vertViewDir"
" ), 0.0);"
" float PlasterLight = 0.3 + max(Diffuse, 0.0);"
" float TileLight = 0.3 + pow(Diffuse, 2.0)*0.9 + pow(Specular, 4.0)*2.5;"
" vec2 ReflCoord = vertReflTexCoord.xy;"
" ReflCoord /= vertReflTexCoord.w;"
" ReflCoord *= 0.5;"
" ReflCoord += vec2(Aspect*0.5, 0.5);"
" ReflCoord += vec2(Normal.x, Normal.z)*0.5;"
" vec3 ReflColor = texture("
" ReflectTex, "
" ReflCoord"
" ).rgb;"
" vec3 TileProps = texture("
" TileTex, "
" vertTileTexCoord * TileCount"
" ).rgb;"
" float Pict = texture(PictTex, vertTileTexCoord).r;"
" float Rand = texture(RandTex, vertTileTexCoord).r;"
" float LightVsDark = "
" mix( 0.1, 0.9, Pict)+"
" mix(-0.1, 0.1, Rand);"
" vec3 TileColor = mix("
" vec3(0.1, 0.1, 0.5),"
" vec3(0.4, 0.4, 0.9),"
" LightVsDark "
" );"
" vec3 PlasterColor = vec3(0.9, 0.9, 0.9);"
" fragColor = vec4("
" mix("
" PlasterColor * PlasterLight,"
" TileColor * TileLight, "
" TileProps.b"
" ) +"
" ReflColor * TileProps.g * 0.6,"
" 1.0"
" );"
"}"
);
plane_fs.Compile();
plane_prog.AttachShader(plane_vs);
plane_prog.AttachShader(plane_fs);
plane_prog.Link();
plane_prog.Use();
Vec3f lightPos(3.0f, 2.5f, 2.0f);
Uniform<Vec3f>(plane_prog, "LightPosition").Set(lightPos);
Uniform<GLuint>(plane_prog, "TileCount").Set(tile_tex_side);
Uniform<Mat4f>(plane_prog, "ModelMatrix").Set(
ModelMatrixf::Translation(0.0f, -0.5f, 0.0f)
);
std::vector<GLfloat> data;
GLuint n_per_vertex;
n_per_vertex = make_plane.Positions(data);
plane_verts.Data(data);
DSAVertexArrayAttribEXT(plane, plane_prog, "Position")
.Setup<GLfloat>(plane_verts, n_per_vertex)
.Enable();
n_per_vertex = make_plane.TexCoordinates(data);
plane_texcoords.Data(data);
DSAVertexArrayAttribEXT(plane, plane_prog, "TexCoord")
.Setup<GLfloat>(plane_texcoords, n_per_vertex)
.Enable();
//
rand_tex.target = Texture::Target::_2D;
rand_tex.Image2D(
images::RandomRedUByte(
tile_tex_side,
tile_tex_side
)
);
rand_tex.Filter(TextureFilter::Nearest);
rand_tex.Wrap(TextureWrap::Repeat);
Texture::Active(0);
UniformSampler(plane_prog, "RandTex").Set(0);
rand_tex.Bind();
//
pict_tex.target = Texture::Target::_2D;
pict_tex.Image2D(images::LoadTexture("pool_pictogram"));
pict_tex.Filter(TextureFilter::Linear);
pict_tex.Wrap(TextureWrap::Repeat);
Texture::Active(1);
UniformSampler(plane_prog, "PictTex").Set(1);
pict_tex.Bind();
//
auto tile_image = images::LoadTexture("small_tile");
//
tile_tex.target = Texture::Target::_2D;
tile_tex.Image2D(tile_image);
tile_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
tile_tex.MagFilter(TextureMagFilter::Linear);
tile_tex.Wrap(TextureWrap::Repeat);
tile_tex.GenerateMipmap();
Texture::Active(2);
UniformSampler(plane_prog, "TileTex").Set(2);
tile_tex.Bind();
//
norm_tex.target = Texture::Target::_2D;
norm_tex.Image2D(
images::TransformComponents<GLfloat, 3>(
images::NormalMap(tile_image),
Mat4d(
Vec4d(1.0, 0.0, 0.0, 0.0),
Vec4d(0.0, 0.0, 1.0, 0.0),
Vec4d(0.0,-1.0, 0.0, 0.0),
Vec4d(0.0, 0.0, 0.0, 1.0)
)
)
);
norm_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
norm_tex.MagFilter(TextureMagFilter::Linear);
norm_tex.Wrap(TextureWrap::Repeat);
norm_tex.GenerateMipmap();
Texture::Active(3);
UniformSampler(plane_prog, "NormTex").Set(3);
norm_tex.Bind();
//
reflect_tex.target = Texture::Target::_2D;
reflect_tex.Image2D(
0,
PixelDataInternalFormat::RGB,
refl_tex_side, refl_tex_side,
0,
PixelDataFormat::RGB,
PixelDataType::UnsignedByte,
nullptr
);
reflect_tex.Filter(TextureFilter::Linear);
reflect_tex.Wrap(TextureWrap::ClampToEdge);
Texture::Active(4);
UniformSampler(plane_prog, "ReflectTex").Set(4);
reflect_tex.Bind();
rbo.Storage(
PixelDataInternalFormat::DepthComponent,
refl_tex_side,
refl_tex_side
);
fbo.target = Framebuffer::Target::Draw;
fbo.AttachTexture(
FramebufferAttachment::Color,
reflect_tex,
0
);
fbo.AttachRenderbuffer(
FramebufferAttachment::Depth,
rbo
);
shape_vs.Source(
"#version 140\n"
"uniform vec3 LightPosition;"
"uniform mat4 ProjectionMatrix, ModelMatrix, CameraMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertNormal;"
"out vec3 vertLightDir;"
"out vec3 vertLightRefl;"
"out vec3 vertViewDir;"
"out vec3 vertViewRefl;"
"out vec3 vertColor;"
"void main(void)"
"{"
" gl_Position = "
" ModelMatrix *"
" Position;"
" vertLightDir = LightPosition - gl_Position.xyz;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertLightRefl = reflect("
" -normalize(vertLightDir),"
" normalize(vertNormal)"
" );"
" vertViewDir = ("
" vec4(0.0, 0.0, 1.0, 1.0)*"
" CameraMatrix"
" ).xyz;"
" vertViewRefl = reflect("
" -normalize(vertViewDir),"
" normalize(vertNormal)"
" );"
" vertColor = vec3(0.3, 0.3, 0.7);"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" gl_Position;"
"}"
);
shape_vs.Compile();
shape_fs.Source(
"#version 140\n"
"uniform sampler2D PictTex, TileTex;"
"uniform uint TileCount;"
"in vec3 vertNormal;"
"in vec3 vertLightDir;"
"in vec3 vertLightRefl;"
"in vec3 vertViewDir;"
"in vec3 vertViewRefl;"
"in vec3 vertColor;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float LtDist = length(vertLightDir);"
" float Diffuse = dot("
" normalize(vertNormal), "
" normalize(vertLightDir)"
" ) / LtDist;"
" float Specular = dot("
" normalize(vertLightRefl),"
" normalize(vertViewDir)"
" );"
" vec3 LightColor = vec3(1.0, 1.0, 1.0);"
" vec2 ReflTexCoord = -vec2("
" vertViewRefl.x,"
" vertViewRefl.z "
" );"
" ReflTexCoord *= 0.25;"
" ReflTexCoord += vec2(0.5, 0.5);"
" float Pict = texture(PictTex, ReflTexCoord).r;"
" float LightVsDark = mix( 0.1, 0.9, Pict);"
" vec3 TileColor = mix("
" vec3(0.2, 0.2, 0.6),"
" vec3(0.5, 0.5, 0.9),"
" LightVsDark"
" );"
" vec3 PlasterColor = vec3(0.7, 0.7, 0.7);"
" vec3 FloorColor = mix("
" PlasterColor, "
" TileColor, "
" texture(TileTex, ReflTexCoord*TileCount).b"
" );"
" vec3 ReflColor = mix("
" vec3(0.5, 0.5, 0.4), "
" FloorColor, "
" pow(max((-vertViewRefl.y-0.5)*2.0, 0.0), 2.0)"
" );"
" fragColor = vec4("
" vertColor * 0.4 + "
" ReflColor * 0.3 + "
" (LightColor + vertColor)*pow(max(2.5*Diffuse, 0.0), 3) + "
" LightColor * pow(max(Specular, 0.0), 64), "
" 1.0"
" );"
"}"
);
shape_fs.Compile();
shape_prog.AttachShader(shape_vs);
shape_prog.AttachShader(shape_fs);
shape_prog.Link();
shape_prog.Use();
Uniform<Vec3f>(shape_prog, "LightPosition").Set(lightPos);
Uniform<Mat4f>(shape_prog, "ModelMatrix").Set(
ModelMatrixf::Translation(0.0f, 0.6f, 0.0f)
);
UniformSampler(shape_prog, "PictTex").Set(0);
UniformSampler(shape_prog, "TileTex").Set(1);
Uniform<GLuint>(shape_prog, "TileCount").Set(tile_tex_side);
n_per_vertex = make_shape.Positions(data);
shape_verts.Data(data);
DSAVertexArrayAttribEXT(shape, shape_prog, "Position")
.Setup<GLfloat>(shape_verts, n_per_vertex)
.Enable();
n_per_vertex = make_shape.Normals(data);
shape_normals.Data(data);
DSAVertexArrayAttribEXT(shape, shape_prog, "Normal")
.Setup<GLfloat>(shape_normals, n_per_vertex)
.Enable();
//
gl.ClearColor(0.5f, 0.5f, 0.4f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
SmokeExample(void)
: emitters(
{
{
{
{-20.0f, -10.0f, 10.0f},
{ 20.0f, 0.0f, -20.0f},
{ 20.0f, 10.0f, 20.0f},
{-20.0f, 0.0f, -10.0f}
}, 15.0, 200.0
},
{
{
{ 30.0f, 0.0f, 5.0f},
{-30.0f, 0.0f, -5.0f},
{-20.0f, 20.0f, 5.0f},
{ 20.0f, -10.0f, -5.0f}
}, 17.0, 200.0
},
}
), vs(ShaderType::Vertex, "Vertex")
, gs(ShaderType::Geometry, "Geometry")
, fs(ShaderType::Fragment, "Fragment")
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, light_cam_pos(prog, "LightCamPos")
{
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 CameraMatrix;"
"in vec4 Position;"
"in float Age;"
"in int Id;"
"out float vertAge;"
"out int vertId;"
"void main(void)"
"{"
" gl_Position = CameraMatrix * Position;"
" vertAge = Age;"
" vertId = Id;"
"}"
);
// compile it
vs.Compile();
// Set the geometry shader source
gs.Source(
"#version 330\n"
"layout(points) in;"
"layout(triangle_strip, max_vertices = 4) out;"
"uniform vec3 LightCamPos;"
"uniform mat4 ProjectionMatrix;"
"in float vertAge[];"
"in int vertId[];"
"out vec2 geomTexCoord;"
"out float geomAge;"
"out float geomLightVal;"
"out float geomLightBias;"
"void main(void)"
"{"
" if(vertAge[0] > 1.0) return;"
" vec3 pos = gl_in[0].gl_Position.xyz;"
" vec3 lightDir = normalize(LightCamPos - pos);"
" float s = 0.8, g = 3.0;"
" float yo[2] = float[2](-1.0, 1.0);"
" float xo[2] = float[2](-1.0, 1.0);"
" float angle = vertId[0];"
" float cx = cos(angle), sx = sin(angle);"
" mat2 rot = mat2(cx, sx, -sx, cx);"
" for(int j=0;j!=2;++j)"
" for(int i=0;i!=2;++i)"
" {"
" float xoffs = xo[i]*(1.0+vertAge[0]*g)*s;"
" float yoffs = yo[j]*(1.0+vertAge[0]*g)*s;"
" vec2 offs = rot*vec2(xoffs, yoffs);"
" gl_Position = ProjectionMatrix * vec4("
" pos.x-offs.x,"
" pos.y-offs.y,"
" pos.z,"
" 1.0"
" );"
" geomTexCoord = vec2(float(i), float(j));"
" geomAge = vertAge[0];"
" geomLightVal = lightDir.z;"
" geomLightBias = -dot("
" normalize(vec3(offs, 0.0)),"
" lightDir"
" );"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
);
// compile it
gs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"uniform sampler2D SmokeTex;"
"in vec2 geomTexCoord;"
"in float geomAge;"
"in float geomLightVal;"
"in float geomLightBias;"
"out vec4 fragColor;"
"void main(void)"
"{"
" vec3 c = texture(SmokeTex, geomTexCoord).rgb;"
" float depth = c.g - c.r;"
" if(depth == 0.0) discard;"
" float density = min(depth * c.b * 2.0, 1.0);"
" float intensity = min("
" max("
" geomLightVal*0.5+"
" geomLightBias,"
" 0.0"
" )+max("
" -geomLightVal*"
" (1.0 - density)*"
" geomLightBias * 5.0,"
" 0.0"
" ),"
" 1.0"
" ) + 0.1;"
" fragColor = vec4("
" intensity,"
" intensity,"
" intensity,"
" (1.0 - geomAge)*density"
" );"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(gs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the particles
particles.Bind();
// bind the VBO for the particle positions
pos_buf.Bind(Buffer::Target::Array);
{
Buffer::Data(Buffer::Target::Array, positions);
VertexAttribArray attr(prog, "Position");
attr.Setup<Vec3f>();
attr.Enable();
}
// bind the VBO for the particle ages
age_buf.Bind(Buffer::Target::Array);
{
Buffer::Data(Buffer::Target::Array, ages);
VertexAttribArray attr(prog, "Age");
attr.Setup<GLfloat>();
attr.Enable();
}
// bind the VBO for the particle identifiers
id_buf.Bind(Buffer::Target::Array);
{
Buffer::Data(Buffer::Target::Array, ids);
VertexAttribArray attr(prog, "Id");
attr.Setup<GLint>();
attr.Enable();
}
Texture::Active(0);
UniformSampler(prog, "SmokeTex").Set(0);
{
auto bound_tex = Bind(smoke_tex, Texture::Target::_2D);
bound_tex.Image2D(
images::Cloud2D(
images::Cloud(
128, 128, 128,
Vec3f(0.1f, -0.5f, 0.3f),
0.5f
)
)
);
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.BorderColor(Vec4f(0.0f, 0.0f, 0.0f, 0.0f));
bound_tex.WrapS(TextureWrap::ClampToBorder);
bound_tex.WrapT(TextureWrap::ClampToBorder);
}
//
gl.ClearColor(0.0f, 0.1f, 0.2f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::Blend);
gl.BlendFunc(BlendFn::SrcAlpha, BlendFn::OneMinusSrcAlpha);
}
CubeExample(void)
: cube_instr(make_cube.Instructions())
, cube_indices(make_cube.Indices())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
, light_pos(prog, "LightPos")
{
namespace se = oglplus::smart_enums;
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"in vec3 Tangent;"
"in vec2 TexCoord;"
"out vec3 vertLight;"
"out vec2 vertTexCoord;"
"out mat3 NormalMatrix;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" vec3 fragNormal = mat3(ModelMatrix) * Normal;"
" vec3 fragTangent = mat3(ModelMatrix) * Tangent;"
" NormalMatrix[0] = fragTangent;"
" NormalMatrix[1] = cross(fragNormal, fragTangent);"
" NormalMatrix[2] = fragNormal;"
" gl_Position = ModelMatrix * Position;"
" vertLight = LightPos - gl_Position.xyz;"
" vertTexCoord = TexCoord;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
// compile it
vs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"uniform sampler2D ColorTex, NormalTex;"
"in mat3 NormalMatrix;"
"in vec3 vertLight;"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = dot(vertLight, vertLight);"
" vec3 n = texture(NormalTex, vertTexCoord).xyz;"
" vec3 finalNormal = NormalMatrix * n;"
" float d = (l > 0.0) ? dot("
" normalize(vertLight), "
" finalNormal"
" ) / l : 0.0;"
" float i = 0.2 + 4.5*max(d, 0.0);"
" vec4 t = texture(ColorTex, vertTexCoord);"
" fragColor = vec4(t.rgb*i, 1.0);"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the cube
cube.Bind();
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Positions(data);
Buffer::Data(se::Array(), data);
VertexAttribArray attr(prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Normals(data);
Buffer::Data(se::Array(), data);
VertexAttribArray attr(prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
tangents.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Tangents(data);
Buffer::Data(se::Array(), data);
VertexAttribArray attr(prog, "Tangent");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
texcoords.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.TexCoordinates(data);
Buffer::Data(se::Array(), data);
VertexAttribArray attr(prog, "TexCoord");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// setup the textures
{
Texture::Active(0);
UniformSampler(prog, "ColorTex").Set(0);
auto bound_tex = Bind(colorTex, se::_2D());
bound_tex.Image2D(images::LoadTexture("wooden_crate"));
bound_tex.GenerateMipmap();
bound_tex.MinFilter(se::LinearMipmapLinear());
bound_tex.MagFilter(se::Linear());
bound_tex.WrapS(se::Repeat());
bound_tex.WrapT(se::Repeat());
}
{
Texture::Active(1);
UniformSampler(prog, "NormalTex").Set(1);
auto bound_tex = Bind(normalTex, se::_2D());
bound_tex.Image2D(
images::NormalMap(
images::LoadTexture("wooden_crate-hmap"),
images::NormalMap::FromRed()
)
);
bound_tex.GenerateMipmap();
bound_tex.MinFilter(se::LinearMipmapLinear());
bound_tex.MagFilter(se::Linear());
bound_tex.WrapS(se::Repeat());
bound_tex.WrapT(se::Repeat());
}
//
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(se::DepthTest());
gl.Enable(se::CullFace());
gl.FrontFace(make_cube.FaceWinding());
}
CloudExample(void)
: projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
{
// Set the vertex shader source
vs.Source(
"#version 330\n"
"in vec4 Position;"
"uniform mat4 CameraMatrix;"
"void main(void)"
"{"
" gl_Position = "
" CameraMatrix *"
" Position;"
"}"
);
// compile it
vs.Compile();
// Set the geometry shader source
gs.Source(
"#version 330\n"
"layout(points) in;"
"layout(triangle_strip, max_vertices = 100) out;"
"const int p = 25;"
"const float hp = (p-1)*0.5;"
"uniform vec3 LightPos;"
"uniform mat4 CameraMatrix, ProjectionMatrix;"
"out vec3 geomTexCoord;"
"out vec3 geomLightDir;"
"void main(void)"
"{"
" float s = 0.6;"
" float yo[2] = float[2](-1.0, 1.0);"
" float xo[2] = float[2](-1.0, 1.0);"
" vec3 cx = vec3("
" CameraMatrix[0][0],"
" CameraMatrix[1][0],"
" CameraMatrix[2][0] "
" );"
" vec3 cy = vec3("
" CameraMatrix[0][1],"
" CameraMatrix[1][1],"
" CameraMatrix[2][1] "
" );"
" vec3 cz = vec3("
" CameraMatrix[0][2],"
" CameraMatrix[1][2],"
" CameraMatrix[2][2] "
" );"
" for(int k=0;k!=p;++k)"
" {"
" for(int j=0;j!=2;++j)"
" for(int i=0;i!=2;++i)"
" {"
" float zo = ((k - hp) / hp);"
" float xoffs = xo[i]*s;"
" float yoffs = yo[j]*s;"
" float zoffs = zo *s;"
" vec4 v = vec4("
" gl_in[0].gl_Position.x+xoffs,"
" gl_in[0].gl_Position.y+yoffs,"
" gl_in[0].gl_Position.z+zoffs,"
" 1.0"
" );"
" gl_Position = ProjectionMatrix * v;"
" geomLightDir = LightPos - v.xyz;"
" geomTexCoord = "
" vec3(0.5, 0.5, 0.5)+"
" cx*(xo[i])*0.707+"
" cy*(yo[j])*0.707+"
" cz*(zo )*0.707;"
" EmitVertex();"
" }"
" EndPrimitive();"
" }"
"}"
);
// compile it
gs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"uniform sampler3D cloudTex;"
"in vec3 geomTexCoord;"
"in vec3 geomLightDir;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float d = texture(cloudTex, geomTexCoord).r;"
" float o = 1.0;"
" float s = 2.0/128.0;"
" float r = s * 8.0;"
" vec3 sampleOffs = normalize(geomLightDir) * s;"
" vec3 samplePos = geomTexCoord;"
" if(d > 0.01) while(o > 0.0)"
" {"
" if(samplePos.x<0.0 || samplePos.x>1.0)"
" break;"
" if(samplePos.y<0.0 || samplePos.y>1.0)"
" break;"
" if(samplePos.z<0.0 || samplePos.z>1.0)"
" break;"
" o -= texture(cloudTex, samplePos).r*r;"
" samplePos += sampleOffs;"
" }"
" float a = 0.2 * d;"
" float i = mix(0.4, 1.0, o);"
" fragColor = vec4(i, i, i, a);"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(gs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the clouds
clouds.Bind();
// bind the VBO for the cloud positions
buffer.Bind(Buffer::Target::Array);
{
GLfloat positions[3] = {0.5f, 0.1f, 0.2f};
Buffer::Data(Buffer::Target::Array, 3, positions);
VertexAttribArray attr(prog, "Position");
attr.Setup(3, DataType::Float);
attr.Enable();
}
{
Texture::Active(0);
UniformSampler(prog, "cloudTex").Set(0);
auto bound_tex = Bind(cloud_tex, Texture::Target::_3D);
bound_tex.Image3D(images::Cloud(128, 128, 128));
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.BorderColor(Vec4f(0.0f, 0.0f, 0.0f, 0.0f));
bound_tex.WrapS(TextureWrap::ClampToBorder);
bound_tex.WrapT(TextureWrap::ClampToBorder);
bound_tex.WrapR(TextureWrap::ClampToBorder);
}
Uniform<Vec3f>(prog, "LightPos").Set(Vec3f(10.0f, 1.0f, 5.0f));
gl.ClearColor(0.2f, 0.3f, 0.4f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::Blend);
gl.BlendFunc(BlendFn::SrcAlpha, BlendFn::OneMinusSrcAlpha);
}
SkyBoxExample(void)
: prog()
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
{
VertexShader vs;
vs.Source(StrLit(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"mat4 Matrix = ProjectionMatrix*CameraMatrix;"
"in vec3 Corner;"
"out vec3 vertTexCoord;"
"void main(void)"
"{"
" gl_Position = Matrix * vec4(Corner * 10.0, 1.0);"
" vertTexCoord = Corner;"
"}"
));
vs.Compile();
prog.AttachShader(vs);
FragmentShader fs;
fs.Source(StrLit(
"#version 330\n"
"uniform samplerCube EnvMap;"
"in vec3 vertTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" fragColor = vec4(texture(EnvMap, normalize(vertTexCoord)).rgb, 1.0);"
"}"
));
fs.Compile();
prog.AttachShader(fs);
prog.Link();
prog.Use();
sky_box.Bind();
GLfloat sky_box_corners[8*3] = {
-1.0f,-1.0f,-1.0f,
+1.0f,-1.0f,-1.0f,
-1.0f,+1.0f,-1.0f,
+1.0f,+1.0f,-1.0f,
-1.0f,-1.0f,+1.0f,
+1.0f,-1.0f,+1.0f,
-1.0f,+1.0f,+1.0f,
+1.0f,+1.0f,+1.0f
};
corners.Bind(Buffer::Target::Array);
Buffer::Data(Buffer::Target::Array, sky_box_corners);
VertexAttribArray vert_attr(prog, "Corner");
vert_attr.Setup(3, DataType::Float).Enable();
GLuint sky_box_indices[6*5] = {
1, 3, 5, 7, 9,
4, 6, 0, 2, 9,
2, 6, 3, 7, 9,
4, 0, 5, 1, 9,
5, 7, 4, 6, 9,
0, 2, 1, 3, 9
};
indices.Bind(Buffer::Target::ElementArray);
Buffer::Data(Buffer::Target::ElementArray, 6*5, sky_box_indices);
gl.Enable(Capability::PrimitiveRestart);
gl.PrimitiveRestartIndex(9);
{
UniformSampler(prog, "EnvMap").Set(0);
Texture::Active(0);
auto bound_tex = oglplus::Bind(env_map, Texture::Target::CubeMap);
bound_tex.MinFilter(TextureMinFilter::Linear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::ClampToEdge);
bound_tex.WrapT(TextureWrap::ClampToEdge);
bound_tex.WrapR(TextureWrap::ClampToEdge);
Texture::Image2D(
Texture::CubeMapFace(0),
images::LoadTexture("cloudy_day-cm_0", false, false)
);
Texture::Image2D(
Texture::CubeMapFace(1),
images::LoadTexture("cloudy_day-cm_1", false, false)
);
Texture::Image2D(
Texture::CubeMapFace(2),
images::LoadTexture("cloudy_day-cm_2", false, false)
);
Texture::Image2D(
Texture::CubeMapFace(3),
images::LoadTexture("cloudy_day-cm_3", false, false)
);
Texture::Image2D(
Texture::CubeMapFace(4),
images::LoadTexture("cloudy_day-cm_4", false, false)
);
Texture::Image2D(
Texture::CubeMapFace(5),
images::LoadTexture("cloudy_day-cm_5", false, false)
);
}
gl.ClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.ClearDepth(1.0f);
}
LandscapeExample(void)
: grid_side(128)
, make_plane(
Vec3f(0.0f, 0.0f, 0.0f),
Vec3f(9.0f, 0.0f, 0.0f),
Vec3f(0.0f, 0.0f,-9.0f),
grid_side*3, grid_side*3
), plane_instr(make_plane.Instructions())
, plane_indices(make_plane.Indices())
, light_pos(prog, "LightPos")
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, light_path(
ListOf<Vec3f>
(Vec3f(-3.0f, 2.0f, -3.5f))
(Vec3f( 0.0f, 5.0f, 0.5f))
(Vec3f( 3.0f, 3.0f, 3.0f))
(Vec3f( 3.0f, 3.0f, -3.0f))
(Vec3f( 0.0f, 5.0f, 0.5f))
(Vec3f(-3.2f, 2.0f, 3.0f))
.Get()
)
{
VertexShader vs;
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"uniform sampler2D TexUnit;"
"in vec4 Position;"
"in vec2 TexCoord;"
"out vec3 vertLight;"
"out vec3 vertNormal;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" gl_Position = Position;"
" float o = 0.0;"
" float s[9];"
" int k=0;"
" for(int y=-1; y!=2; ++y)"
" for(int x=-1; x!=2; ++x)"
" {"
" s[k] = sqrt(texture("
" TexUnit, "
" TexCoord*3.0+"
" vec2(x, y)/128.0"
" ).r);"
" o += s[k++];"
" }"
" gl_Position.y += o*0.5;"
" vec3 c = vec3( 0.0, s[4], 0.0);"
" float d = 1.0/32.0;"
" vertNormal = normalize("
" cross("
" vec3( 0.0, s[1], -d) - c,"
" vec3( -d, s[3], 0.0) - c"
" )+"
" cross("
" vec3( d, s[5], 0.0) - c,"
" vec3( 0.0, s[1], -d) - c"
" )+"
" cross("
" vec3( 0.0, s[7], d) - c,"
" vec3( d, s[5], 0.0) - c"
" )+"
" cross("
" vec3( -d, s[3], 0.0) - c,"
" vec3( 0.0, s[7], d) - c"
" )"
" );"
" vertLight = LightPos - gl_Position.xyz;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" gl_Position;"
"}"
);
vs.Compile();
FragmentShader fs;
fs.Source(
"#version 330\n"
"in vec3 vertNormal;"
"in vec3 vertLight;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = length(vertLight);"
" float d = l > 0? dot("
" normalize(vertNormal), "
" normalize(vertLight)"
" ) / l : 0.0;"
" float i = 0.1 + 1.2*max(d, 0.0) + 4.2*pow(d, 2.0);"
" fragColor = vec4(i*0.7, i*0.7, i*0.3, 1.0);"
"}"
);
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the plane
plane.Bind();
// bind the VBO for the plane vertices
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_plane.Positions(data);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
// setup the vertex attribs array for the vertices
VertexAttribArray attr(prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// bind the VBO for the plane texture coordinates
texcoords.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_plane.TexCoordinates(data);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
// setup the vertex attribs array for the vertices
VertexAttribArray attr(prog, "TexCoord");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// setup the texture
Texture::Target tex_tgt = Texture::Target::_2D;
tex.Bind(tex_tgt);
{
auto image = images::NewtonFractal(
grid_side, grid_side,
Vec3f(0.0f, 0.1f, 0.2f),
Vec3f(1.0f, 0.8f, 0.9f),
Vec2f(-1.0f, -1.0f),
Vec2f( 1.0f, 1.0f),
images::NewtonFractal::X3Minus1(),
images::NewtonFractal::DefaultMixer()
);
Texture::Image2D(tex_tgt, image);
Texture::MinFilter(tex_tgt, TextureMinFilter::Linear);
Texture::MagFilter(tex_tgt, TextureMagFilter::Linear);
Texture::WrapS(tex_tgt, TextureWrap::MirroredRepeat);
Texture::WrapT(tex_tgt, TextureWrap::MirroredRepeat);
}
//
UniformSampler(prog, "TexUnit").Set(0);
gl.ClearColor(0.8f, 0.8f, 0.7f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_plane.FaceWinding());
gl.CullFace(Face::Back);
}
MultiViewportExample(void)
: make_shape(1.0, 0.1, 8, 4, 48)
, shape_instr(make_shape.Instructions())
, shape_indices(make_shape.Indices())
, camera_position_3(prog, "CameraPosition[3]")
, camera_matrix_0(prog, "CameraMatrix[0]")
, camera_matrix_1(prog, "CameraMatrix[1]")
, camera_matrix_2(prog, "CameraMatrix[2]")
, camera_matrix_3(prog, "CameraMatrix[3]")
, model_matrix(prog, "ModelMatrix")
{
VertexShader vs;
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 ModelMatrix;"
"uniform vec3 LightPos;"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertNormal;"
"out vec3 vertTexCoord;"
"out vec3 vertLightDir;"
"out vec3 vertLightRefl;"
"void main(void)"
"{"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertTexCoord = Normal;"
" gl_Position = ModelMatrix * Position;"
" vertLightDir = LightPos-gl_Position.xyz;"
" vertLightRefl = reflect(-vertLightDir, vertNormal);"
"}"
);
vs.Compile();
GeometryShader gs;
// Set the geometry shader source
gs.Source(
"#version 330\n"
"#extension GL_ARB_viewport_array : enable\n"
"layout(triangles) in;"
"layout(triangle_strip, max_vertices = 12) out;"
"uniform mat4 CameraMatrix[4];"
"uniform vec3 CameraPosition[4];"
"in vec3 vertNormal[];"
"in vec3 vertTexCoord[];"
"in vec3 vertLightDir[];"
"in vec3 vertLightRefl[];"
"out vec3 geomNormal;"
"out vec3 geomTexCoord;"
"out vec3 geomLightDir;"
"out vec3 geomLightRefl;"
"out vec3 geomViewDir;"
"out vec3 geomViewRefl;"
"void main(void)"
"{"
" for(int vp=0; vp!=4; ++vp)"
" {"
" gl_ViewportIndex = vp;"
" for(int v=0; v!=3; ++v)"
" {"
" geomNormal = vertNormal[v];"
" geomTexCoord = vertTexCoord[v];"
" geomLightDir = vertLightDir[v];"
" geomLightRefl = vertLightRefl[v];"
" geomViewDir = "
" CameraPosition[vp] - "
" gl_in[v].gl_Position.xyz;"
" geomViewRefl = reflect("
" -geomViewDir,"
" geomNormal"
" );"
" gl_Position = "
" CameraMatrix[vp] *"
" gl_in[v].gl_Position;"
" EmitVertex();"
" }"
" EndPrimitive();"
" }"
"}"
);
gs.Compile();
FragmentShader fs;
// set the fragment shader source
fs.Source(
"#version 330\n"
"uniform samplerCube TexUnit;"
"in vec3 geomNormal;"
"in vec3 geomTexCoord;"
"in vec3 geomLightDir;"
"in vec3 geomLightRefl;"
"in vec3 geomViewDir;"
"in vec3 geomViewRefl;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = length(geomLightDir);"
" float d = dot("
" normalize(geomNormal), "
" normalize(geomLightDir)"
" ) / l;"
" float s = dot("
" normalize(geomLightRefl),"
" normalize(geomViewDir)"
" );"
" vec3 lt = vec3(1.0, 1.0, 1.0);"
" vec3 tex = texture(TexUnit, geomTexCoord).rgb;"
" fragColor = vec4("
" tex * 0.4 + "
" (lt + tex) * 1.5 * max(d, 0.0) + "
" lt * pow(max(s, 0.0), 64), "
" 1.0"
" );"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(gs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the shape
shape.Bind();
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// setup the texture
{
GLuint tex_side = 512;
auto image = images::NewtonFractal(
tex_side, tex_side,
Vec3f(0.8f, 0.8f, 1.0f),
Vec3f(0.1f, 0.0f, 0.2f),
Vec2f(-0.707f, -0.707f),
Vec2f( 0.707f, 0.707f),
images::NewtonFractal::X4Minus1(),
[](double x) -> double
{
return pow(SineWave(pow(x,0.5)), 4.0);
}
);
auto bound_tex = Bind(tex, Texture::Target::CubeMap);
bound_tex.MinFilter(TextureMinFilter::Linear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::ClampToEdge);
bound_tex.WrapT(TextureWrap::ClampToEdge);
bound_tex.WrapR(TextureWrap::ClampToEdge);
for(int i=0; i!=6; ++i)
Texture::Image2D(Texture::CubeMapFace(i), image);
}
//
UniformSampler(prog, "TexUnit").Set(0);
Uniform<Vec3f>(prog, "LightPos").Set(Vec3f(3.0f, 5.0f, 4.0f));
//
gl.ClearColor(0.1f, 0.05f, 0.2f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_shape.FaceWinding());
gl.CullFace(Face::Back);
Uniform<Vec3f> camera_position(prog, "CameraPosition");
camera_position[0].Set(Vec3f(2, 0, 0));
camera_position[1].Set(Vec3f(0, 2, 0));
camera_position[2].Set(Vec3f(0, 0, 2));
}
FlareExample(void)
: shape(shape_prog, shapes::SpiralSphere())
, n_flares(32)
, queries(n_flares)
{
std::vector<Vec3f> light_positions(n_flares);
for(GLuint i=0; i!=n_flares; ++i)
{
const float rand_max = float(RAND_MAX);
auto angle = FullCircles(std::rand()/rand_max);
light_positions[i] = Vec3f(
7.0f*Cos(angle),
0.2f*(std::rand()/rand_max)-0.1f,
7.0f*Sin(angle)
);
}
shape_prog.light_position.Set(light_positions);
shape_prog.color_1 = Vec3f(0.3f, 0.3f, 0.5f);
shape_prog.color_2 = Vec3f(0.8f, 0.8f, 1.0f);
Texture::Active(0);
shape_prog.metal_tex.Set(0);
metal_texture
<< TextureTarget::_2D
<< TextureMinFilter::LinearMipmapLinear
<< TextureMagFilter::Linear
<< TextureWrap::Repeat
<< images::BrushedMetalUByte(
512, 512,
5120,
-12, +12,
32, 64
)
<< TextureMipmap();
Texture::Active(1);
UniformSampler(flare_prog, "FlareTex").Set(1);
flare_texture
<< TextureTarget::_2D
<< TextureMinFilter::LinearMipmapLinear
<< TextureMagFilter::Linear
<< images::LoadTexture("flare_1")
<< TextureMipmap();
(TextureTarget::_2D|0) << TextureWrap::MirroredRepeat;
(TextureTarget::_2D|1) << TextureWrap::Repeat;
lights.Bind();
try
{
light_pos.Bind(Buffer::Target::Array);
Buffer::Data(Buffer::Target::Array, light_positions);
light_prog.Use();
VertexArrayAttrib light_attr(light_prog, "Position");
light_attr.Setup<Vec3f>();
light_attr.Enable();
flare_prog.Use();
VertexArrayAttrib flare_attr(flare_prog, "Position");
flare_attr.Setup<Vec3f>();
flare_attr.Enable();
}
catch(Error&)
{ }
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::ProgramPointSize);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.CullFace(Face::Back);
gl.BlendFunc(BlendFn::SrcAlpha, BlendFn::One);
}
WavesExample(void)
: make_plane(
Vec3f( 0.0f, 0.0f, 0.0f),
Vec3f(100.0f, 0.0f, 0.0f),
Vec3f( 0.0f, 0.0f,-100.0f),
50, 50
), plane_instr(make_plane.PatchInstructions())
, plane_indices(make_plane.PatchIndices())
, camera_matrix(prog, "CameraMatrix")
, camera_position(prog, "CameraPosition")
, anim_time(prog, "Time")
, prev_period(-1)
{
VertexShader vs(ObjectDesc("Vertex"));
vs.Source(StrLit(
"#version 410\n"
"uniform vec3 CameraPosition;"
"in vec3 Position;"
"out vec3 vertPosition;"
"out float vertDistance;"
"void main(void)"
"{"
" vertPosition = Position;"
" vertDistance = distance(CameraPosition, Position);"
"}"
));
vs.Compile();
prog.AttachShader(vs);
TessControlShader cs(ObjectDesc("TessControl"));
cs.Source(
"#version 410\n"
"layout(vertices = 3) out;"
"in vec3 vertPosition[];"
"in float vertDistance[];"
"out vec3 tecoPosition[];"
"int tessLevel(float dist)"
"{"
" return clamp(int(150.0 / (dist+0.1)), 1, 10);"
"}"
"void main(void)"
"{"
" tecoPosition[gl_InvocationID] ="
" vertPosition[gl_InvocationID];"
" if(gl_InvocationID == 0)"
" {"
" gl_TessLevelInner[0] = tessLevel(("
" vertDistance[0]+"
" vertDistance[1]+"
" vertDistance[2] "
" )*0.333);"
" gl_TessLevelOuter[0] = tessLevel(("
" vertDistance[1]+"
" vertDistance[2] "
" )*0.5);"
" gl_TessLevelOuter[1] = tessLevel(("
" vertDistance[2]+"
" vertDistance[0] "
" )*0.5);"
" gl_TessLevelOuter[2] = tessLevel(("
" vertDistance[0]+"
" vertDistance[1] "
" )*0.5);"
" }"
"}"
);
cs.Compile();
prog.AttachShader(cs);
TessEvaluationShader es(ObjectDesc("TessEvaluation"));
es.Source(
"#version 410\n"
"#define MaxWaves 5\n"
"layout(triangles, equal_spacing, ccw) in;"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"uniform vec3 LightPosition;"
"uniform vec3 CameraPosition;"
"uniform float Time;"
"uniform int WaveCount;"
"uniform vec3 WaveDirections[MaxWaves];"
"uniform vec3 WaveDimensions[MaxWaves];"
"in vec3 tecoPosition[];"
"out vec3 teevNormal;"
"out vec3 teevLightDir;"
"out vec3 teevViewDir;"
"out float teevDistance;"
"void main(void)"
"{"
" const vec3 Up = vec3(0.0, 1.0, 0.0);"
" vec3 Position ="
" gl_TessCoord.x * tecoPosition[0]+"
" gl_TessCoord.y * tecoPosition[1]+"
" gl_TessCoord.z * tecoPosition[2];"
" vec3 Pos = Position;"
" vec3 Nml = Up;"
" for(int w=0; w!=WaveCount; ++w)"
" {"
" vec3 Dir = WaveDirections[w];"
" vec3 Dim = WaveDimensions[w];"
" float Dist = dot(Position, Dir);"
" float u = Dim.y*sin(Dist/Dim.x + Time*Dim.z);"
" Pos += Up * u;"
" float w = (Dim.y/Dim.x)*cos(Dist/Dim.x + Time*Dim.z);"
" Nml -= Dir * w;"
" float d = -0.125*Dim.x*sin(2.0*Dist/Dim.x + Time*Dim.z);"
" Pos += Dir * d;"
" }"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" vec4(Pos, 1.0);"
" teevNormal = normalize(Nml);"
" teevLightDir = normalize(LightPosition - Pos);"
" teevViewDir = normalize(CameraPosition - Pos);"
" teevDistance = distance(CameraPosition, Pos);"
"}"
);
es.Compile();
prog.AttachShader(es);
FragmentShader fs(ObjectDesc("Fragment"));
fs.Source(StrLit(
"#version 410\n"
"uniform samplerCube EnvMap;"
"in vec3 teevNormal;"
"in vec3 teevLightDir;"
"in vec3 teevViewDir;"
"in float teevDistance;"
"out vec3 fragColor;"
"void main(void)"
"{"
" float Dim = clamp(30.0/teevDistance, 0.0, 1.0);"
" float LightRefl = dot(reflect(-teevLightDir, teevNormal), teevViewDir);"
" float LightHit = dot(teevNormal, teevLightDir);"
" float Diffuse = clamp(LightHit+0.1, 0.0, 1.0);"
" float Specular = pow(clamp(LightRefl, 0.0, 0.91), 32);"
" vec3 Environ=texture(EnvMap,reflect(-teevViewDir, teevNormal)).rgb;"
" vec3 WaterColor = vec3(0.4, 0.5, 0.5);"
" vec3 LightColor = vec3(1.0, 1.0, 1.0);"
" vec3 FogColor = vec3(0.9, 0.9, 0.9);"
" vec3 WaveColor ="
" LightColor*Specular+"
" WaterColor*Diffuse+"
" Environ*0.02;"
" fragColor = mix(WaveColor, FogColor, 1.0-Dim);"
"}"
));
fs.Compile();
prog.AttachShader(fs);
prog.Link();
prog.Use();
plane.Bind();
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_plane.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(prog, "Position");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
Uniform<Vec3f>(prog, "LightPosition").Set(-100.0, 100.0, 20.0);
Uniform<Vec3f> wave_directions(prog, "WaveDirections");
Uniform<Vec3f> wave_dimensions(prog, "WaveDimensions");
Uniform<GLint>(prog, "WaveCount").Set(5);
wave_directions[0] = Normalized(Vec3f(1.0f, 0.0f, 1.0f));
wave_dimensions[0] = Vec3f(5.0f, 1.5f, 1.2f);
wave_directions[1] = Normalized(Vec3f(1.0f, 0.0f, 0.5f));
wave_dimensions[1] = Vec3f(4.0f, 0.8f, 1.2f);
wave_directions[2] = Normalized(Vec3f(1.0f, 0.0f, 0.1f));
wave_dimensions[2] = Vec3f(2.0f, 0.5f, 2.4f);
wave_directions[3] = Normalized(Vec3f(1.0f, 0.0f,-0.1f));
wave_dimensions[3] = Vec3f(1.5f, 0.2f, 3.7f);
wave_directions[4] = Normalized(Vec3f(1.0f, 0.0f, 0.4f));
wave_dimensions[4] = Vec3f(1.1f, 0.2f, 4.7f);
Texture::Active(0);
{
auto image = images::Squares(512, 512, 0.9f, 16, 16);
auto bound_tex = Bind(env_map, Texture::Target::CubeMap);
for(int i=0; i!=6; ++i)
Texture::Image2D(Texture::CubeMapFace(i), image);
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::ClampToEdge);
bound_tex.WrapT(TextureWrap::ClampToEdge);
bound_tex.WrapR(TextureWrap::ClampToEdge);
bound_tex.SwizzleG(TextureSwizzle::Red);
bound_tex.SwizzleB(TextureSwizzle::Red);
}
UniformSampler(prog, "EnvMap").Set(0);
gl.ClearColor(0.9f, 0.9f, 0.9f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
MetaballExample(void)
{
for(GLuint i=0; i!=64; ++i)
{
GLuint j = 0, n = 3+std::rand()%3;
std::vector<Vec4f> points(n);
while(j != n)
{
points[j] = Vec4f(
1.4*std::rand()/GLdouble(RAND_MAX) - 0.7,
1.4*std::rand()/GLdouble(RAND_MAX) - 0.7,
0.0,
0.1*std::rand()/GLdouble(RAND_MAX) + 0.1
);
++j;
}
ball_paths.push_back(CubicBezierLoop<Vec4f, double>(points));
++i;
}
// Set the vertex shader source
vs.Source(StrLit(
"#version 330\n"
"in vec2 Position;"
"out vec3 vertPosition;"
"void main(void)"
"{"
" vertPosition = vec3(Position, 0.0);"
" gl_Position = vec4(vertPosition, 1.0);"
"}"
));
// compile it
vs.Compile();
// set the fragment shader source
fs.Source(StrLit(
"#version 330\n"
"uniform sampler1D Metaballs;"
"in vec3 vertPosition;"
"out vec3 fragColor;"
"const vec3 AmbientColor = vec3(0.3, 0.4, 0.9);"
"const vec3 DiffuseColor = vec3(0.5, 0.6, 1.0);"
"const vec3 LightDir = normalize(vec3(1.0, 1.0, 1.0));"
"void main(void)"
"{"
" int i = 0, n = textureSize(Metaballs, 0);"
" float InvN = 1.0/n;"
" float Value = 0.0;"
" vec3 Normal = vec3(0.0, 0.0, 0.0);"
" while(i != n)"
" {"
" vec4 Metaball = texelFetch(Metaballs, i, 0);"
" float Radius = Metaball.w;"
" vec3 Vect = vertPosition - Metaball.xyz;"
" float Tmp = pow(Radius,2.0)/dot(Vect, Vect)-0.25;"
" Value += Tmp;"
" float Mul = max(Tmp, 0.0);"
" Normal += Mul*vec3(Vect.xy, Mul*InvN/Radius);"
" ++i;"
" }"
" if(Value > 0.0)"
" {"
" float Diffuse = 1.4*max(dot("
" LightDir,"
" normalize(Normal)"
" ), 0.0);"
" float Ambient = 0.3;"
" fragColor = "
" Ambient*AmbientColor+"
" Diffuse*DiffuseColor;"
" }"
" else fragColor = vec3(0.4, 0.4, 0.4);"
"}"
));
// compile it
fs.Compile();
// attach the shaders to the program
prog << vs << fs;
// link and use it
prog.Link().Use();
// bind the VAO for the rectangle
rectangle.Bind();
GLfloat rectangle_verts[8] = {
-1.0f, -1.0f,
-1.0f, 1.0f,
1.0f, -1.0f,
1.0f, 1.0f
};
// bind the VBO for the rectangle vertices
verts.Bind(Buffer::Target::Array);
// upload the data
Buffer::Data(Buffer::Target::Array, rectangle_verts);
// setup the vertex attribs array for the vertices
VertexAttribArray vert_attr(prog, "Position");
vert_attr.Setup(2, DataType::Float).Enable();
//
Texture::Active(0);
UniformSampler(prog, "Metaballs").Set(0);
{
auto bound_tex = Bind(metaballs_tex, Texture::Target::_1D);
bound_tex.Image1D(
0,
PixelDataInternalFormat::RGBA32F,
ball_paths.size(),
0,
PixelDataFormat::RGBA,
PixelDataType::Float,
nullptr
);
bound_tex.MinFilter(TextureMinFilter::Nearest);
bound_tex.MagFilter(TextureMagFilter::Nearest);
bound_tex.WrapS(TextureWrap::MirroredRepeat);
}
gl.ClearDepth(1.0f);
}
TriangleExample(void)
: projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, camera_position(prog, "CameraPosition")
, light_position(prog, "LightPosition")
, shape(
List("Position")("TexCoord").Get(),
shapes::Plane(
Vec3f(),
Vec3f(1.0f, 0.0f, 0.0f),
Vec3f(0.0f, 0.0f,-1.0f),
32, 32
)
)
{
VertexShader vs;
vs.Source(StrLit(
"#version 330\n"
"in vec3 Position;"
"in vec2 TexCoord;"
"out vec2 vertTexCoord;"
"void main(void)"
"{"
" gl_Position = vec4(Position, 1.0);"
" vertTexCoord = TexCoord;"
"}"
)).Compile();
prog.AttachShader(vs);
GeometryShader gs;
gs.Source(StrLit(
"#version 330\n"
"#extension GL_ARB_gpu_shader5 : enable\n"
"layout(triangles, invocations = 7) in;"
"layout(triangle_strip, max_vertices = 21) out;"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"mat4 Matrix = ProjectionMatrix * CameraMatrix;"
"uniform vec3 CameraPosition;"
"in vec2 vertTexCoord[3];"
"out gl_PerVertex {"
" vec4 gl_Position;"
" float gl_ClipDistance[3];"
"};"
"flat out mat3 geomPositionFront;"
"flat out mat3 geomTexCoordFront;"
"flat out vec3 geomWFront;"
"noperspective out vec3 geomBarycentric;"
"out vec3 geomPosition;"
"out vec3 geomTexCoord;"
"void main(void)"
"{"
" vec4 world_pos[8*3];"
" vec3 tex_coord[8*3];"
" vec4 view_pos[8*3];"
" vec3 screen_pos[8*3];"
" bool front_facing[8];"
" int ft = gl_InvocationID+1;"
" for(int pass=0; pass!=2; ++pass)"
" {"
" bool first = pass == 0;"
" if(((ft == 0) && first) || (((ft != 0) && !first)))"
" {"
" for(int v=0; v!=3; ++v)"
" {"
" int w = 2-v;"
" world_pos[0+v] = gl_in[w].gl_Position;"
" tex_coord[0+v] = vec3(vertTexCoord[w], 0.0);"
" }"
" }"
" vec4 n = vec4(-0.15 * normalize(cross("
" gl_in[1].gl_Position.xyz-gl_in[0].gl_Position.xyz,"
" gl_in[2].gl_Position.xyz-gl_in[0].gl_Position.xyz "
" )), 0.0);"
" if(((ft == 1) && first) || (((ft != 1) && !first)))"
" {"
" for(int v=0; v!=3; ++v)"
" {"
" world_pos[3+v] = gl_in[v].gl_Position + n;"
" tex_coord[3+v] = vec3(vertTexCoord[v], 1.0);"
" }"
" }"
" for(int v=0; v!=3; ++v)"
" {"
" int w = (v+1)%3;"
" int k = 2+2*v;"
" if(((ft == k) && first) || (((ft != k) && !first)))"
" {"
" world_pos[6+0+v*6] = gl_in[v].gl_Position;"
" tex_coord[6+0+v*6] = vec3(vertTexCoord[v], 0.0);"
" world_pos[6+1+v*6] = gl_in[w].gl_Position;"
" tex_coord[6+1+v*6] = vec3(vertTexCoord[w], 0.0);"
" world_pos[6+2+v*6] = gl_in[v].gl_Position + n;"
" tex_coord[6+2+v*6] = vec3(vertTexCoord[v], 1.0);"
" }"
" k = 3+2*v;"
" if(((ft == k) && first) || (((ft != k) && !first)))"
" {"
" world_pos[6+3+v*6] = gl_in[w].gl_Position;"
" tex_coord[6+3+v*6] = vec3(vertTexCoord[w], 0.0);"
" world_pos[6+4+v*6] = gl_in[w].gl_Position + n;"
" tex_coord[6+4+v*6] = vec3(vertTexCoord[w], 1.0);"
" world_pos[6+5+v*6] = gl_in[v].gl_Position + n;"
" tex_coord[6+5+v*6] = vec3(vertTexCoord[v], 1.0);"
" }"
" }"
" for(int t=first?ft:0; t!=8; ++t)"
" {"
" if(!first && (t == ft)) continue;"
" int o = t*3;"
" for(int v=0; v!=3; ++v)"
" {"
" int w = o+v;"
" view_pos[w] = Matrix * world_pos[w];"
" screen_pos[w] = view_pos[w].xyz/view_pos[w].w;"
" }"
" front_facing[t] = cross("
" screen_pos[o+1]-screen_pos[o+0],"
" screen_pos[o+2]-screen_pos[o+0] "
" ).z < 0.0;"
" if(first) break;"
" }"
" if(first && !front_facing[ft]) return;"
" }"
" int o = ft*3;"
" vec4 clip_plane[3];"
" for(int v=0; v!=3; ++v)"
" {"
" int w = (v+1)%3;"
" vec3 p0 = world_pos[o+v].xyz;"
" vec3 p1 = world_pos[o+w].xyz;"
" vec3 p2 = CameraPosition;"
" vec3 pv = normalize(cross(p1-p0, p2-p0));"
" clip_plane[v] = vec4(pv, -dot(pv, p0));"
" }"
" vec3 lo = CameraPosition;"
" vec3 p0 = world_pos[o+0].xyz;"
" vec3 pu = world_pos[o+1].xyz-p0;"
" vec3 pv = world_pos[o+2].xyz-p0;"
" vec3 lp = lo-p0;"
" float w0 = view_pos[o+0].w;"
" float wu = view_pos[o+1].w-w0;"
" float wv = view_pos[o+2].w-w0;"
" vec3 t0 = tex_coord[o+0];"
" vec3 tu = tex_coord[o+1]-t0;"
" vec3 tv = tex_coord[o+2]-t0;"
" for(int bt=0; bt!=8; ++bt)"
" {"
" int k = bt*3;"
" if((ft != bt) && !front_facing[bt])"
" {"
" for(int v=0; v!=3; ++v)"
" {"
" vec3 lt = world_pos[k+v].xyz;"
" mat3 im = mat3(lo-lt, pu, pv);"
" vec3 ic = inverse(im)*lp;"
" float s = ic.y;"
" float t = ic.z;"
" geomPositionFront[v] = p0+pu*s+pv*t;"
" geomTexCoordFront[v] = t0+tu*s+tv*t;"
" geomWFront[v] = w0+wu*s+wv*t;"
" }"
" for(int v=0; v!=3; ++v)"
" {"
" int w = k+v;"
" gl_Position = view_pos[w];"
" for(int c=0; c!=3; ++c)"
" {"
" gl_ClipDistance[c] = dot("
" clip_plane[c],"
" world_pos[w]"
" );"
" }"
" geomPosition = world_pos[w].xyz;"
" geomTexCoord = tex_coord[w];"
" geomBarycentric = vec3(0.0);"
" geomBarycentric[v] = 1.0;"
" EmitVertex();"
" }"
" EndPrimitive();"
" }"
" }"
"}"
)).Compile();
prog.AttachShader(gs);
FragmentShader fs;
fs.Source(StrLit(
"#version 330\n"
"uniform float Time;"
"uniform sampler2D ColorMap;"
"uniform sampler2D BumpMap;"
"uniform vec3 LightPosition;"
"flat in mat3 geomPositionFront;"
"flat in mat3 geomTexCoordFront;"
"flat in vec3 geomWFront;"
"noperspective in vec3 geomBarycentric;"
"in vec3 geomPosition;"
"in vec3 geomTexCoord;"
"out vec3 fragColor;"
"vec3 vcdiv(vec3 a, vec3 b)"
"{"
" return vec3(a.x/b.x, a.y/b.y, a.z/b.z);"
"}"
"void main(void)"
"{"
" const vec3 one = vec3(1.0, 1.0, 1.0);"
" vec3 bzfv = vcdiv(geomBarycentric,geomWFront);"
" vec3 p0 = geomPosition;"
" vec3 p1 = (geomPositionFront*bzfv)/dot(one,bzfv);"
" vec3 tc0 = geomTexCoord;"
" vec3 tc1 = (geomTexCoordFront*bzfv)/dot(one,bzfv);"
" ivec2 ts = textureSize(BumpMap, 0);"
" int mts = max(ts.x, ts.y);"
" vec2 dtc = tc1.xy - tc0.xy;"
" float mdtc = max(abs(dtc.x), abs(dtc.y));"
" int nsam = max(min(int(mdtc*mts), mts/2), 1);"
" float step = 1.0 / nsam;"
" for(int s=0; s<=nsam; ++s)"
" {"
" vec3 tc = mix(tc1, tc0, s*step);"
" vec4 bm = texture(BumpMap, tc.xy);"
" if(tc.z <= bm.w)"
" {"
" vec3 p = mix(p1, p0, s*step);"
" vec3 ldir = normalize(LightPosition - p);"
" float l = max(dot(ldir, bm.xzy), 0.0)*1.3;"
" fragColor = texture(ColorMap, tc.xy).rgb*l;"
" return;"
" }"
" }"
" discard;"
"}"
)).Compile();
prog.AttachShader(fs);
prog.Link();
prog.Use();
shape.UseInProgram(prog);
auto tex_image = images::LoadTexture("stones_color_hmap");
Texture::Active(0);
try
{
UniformSampler(prog, "ColorMap").Set(0);
auto bound_tex = Bind(color_tex, Texture::Target::_2D);
bound_tex.Image2D(tex_image);
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::Repeat);
bound_tex.WrapT(TextureWrap::Repeat);
}
catch(Error&){ }
Texture::Active(1);
try
{
UniformSampler(prog, "BumpMap").Set(1);
auto bound_tex = Bind(bump_tex, Texture::Target::_2D);
bound_tex.Image2D(
images::NormalMap(
tex_image,
images::NormalMap::FromAlpha()
)
);
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::Repeat);
bound_tex.WrapT(TextureWrap::Repeat);
}
catch(Error&){ }
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Disable(Capability::CullFace);
gl.Enable(Functionality::ClipDistance, 0);
gl.Enable(Functionality::ClipDistance, 1);
gl.Enable(Functionality::ClipDistance, 2);
}
CubeExample()
: cube_instr(make_cube.Instructions())
, cube_indices(make_cube.Indices())
, prog(make())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
, light_pos(prog, "LightPos") {
// bind the VAO for the cube
gl.Bind(cube);
gl.Bind(Buffer::Target::Array, verts);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
(prog | "Position").Setup<GLfloat>(n_per_vertex).Enable();
}
gl.Bind(Buffer::Target::Array, normals);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
(prog | "Normal").Setup<GLfloat>(n_per_vertex).Enable();
}
gl.Bind(Buffer::Target::Array, tangents);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Tangents(data);
Buffer::Data(Buffer::Target::Array, data);
(prog | "Tangent").Setup<GLfloat>(n_per_vertex).Enable();
}
gl.Bind(Buffer::Target::Array, texcoords);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.TexCoordinates(data);
Buffer::Data(Buffer::Target::Array, data);
(prog | "TexCoord").Setup<GLfloat>(n_per_vertex).Enable();
}
{
auto img = images::SphereBumpMap(512, 512, 2, 2);
Uniform<GLsizei>(prog, "BumpTexWidth").Set(img.Width());
Uniform<GLsizei>(prog, "BumpTexHeight").Set(img.Height());
UniformSampler(prog, "BumpTex").Set(0);
Texture::Active(0);
gl.Bound(Texture::Target::_2D, bumpTex)
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::Repeat)
.WrapT(TextureWrap::Repeat)
.Image2D(img)
.GenerateMipmap();
}
//
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_cube.FaceWinding());
}
CubeExample(void)
: cube_instr(make_cube.Instructions())
, cube_indices(make_cube.Indices())
, prog(make_prog())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
, light_pos(prog, "LightPos")
{
gl.Bind(cube);
gl.Bind(Buffer::Target::Array, verts);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Positions(data);
gl.Current(Buffer::Target::Array).Data(data);
VertexArrayAttrib attr(prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
gl.Bind(Buffer::Target::Array, normals);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Normals(data);
gl.Current(Buffer::Target::Array).Data(data);
VertexArrayAttrib attr(prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
gl.Bind(Buffer::Target::Array, tangents);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Tangents(data);
gl.Current(Buffer::Target::Array).Data(data);
VertexArrayAttrib attr(prog, "Tangent");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
gl.Bind(Buffer::Target::Array, texcoords);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.TexCoordinates(data);
gl.Current(Buffer::Target::Array).Data(data);
VertexArrayAttrib attr(prog, "TexCoord");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// setup the textures
{
Texture::Active(0);
UniformSampler(prog, "ColorTex").Set(0);
gl.Bind(Texture::Target::_2D, colorTex);
gl.Current(Texture::Target::_2D)
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::Repeat)
.WrapT(TextureWrap::Repeat)
.Image2D(images::LoadTexture("wooden_crate"))
.GenerateMipmap();
}
{
Texture::Active(1);
UniformSampler(prog, "NormalTex").Set(1);
gl.Bind(Texture::Target::_2D, normalTex);
gl.Current(Texture::Target::_2D)
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::Repeat)
.WrapT(TextureWrap::Repeat)
.Image2D(
images::NormalMap(
images::LoadTexture("wooden_crate-hmap")
)
).GenerateMipmap();
}
//
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_cube.FaceWinding());
}
