void init_heights(void)
{
ProgramUniformSampler(display_prog, "Heights").Set(1);
ProgramUniformSampler(shadow_prog, "Heights").Set(1);
heights.target = Texture::Target::_2D;
heights.BindMulti(1, Texture::Target::_2D);
heights.Image2D(
0,
PixelDataInternalFormat::DepthComponent32,
side, side,
0,
PixelDataFormat::DepthComponent,
PixelDataType::Float,
nullptr
);
heights.BorderColor(Vec4f(1,1,1,1));
heights.MinFilter(TextureMinFilter::Nearest);
heights.MagFilter(TextureMagFilter::Nearest);
heights.WrapS(TextureWrap::ClampToBorder);
heights.WrapT(TextureWrap::ClampToBorder);
heights_fbo.target = Framebuffer::Target::Draw;
heights_fbo.AttachTexture(FramebufferAttachment::Depth, heights, 0);
heights_fbo.Complete();
}
CubeExample(void)
: n(16)
, screen_prog()
, draw_prog()
, screen(List("Position")("TexCoord").Get(), shapes::Screen(), screen_prog)
, cube(List("Position").Get(), shapes::Cube(), draw_prog)
{
draw_prog.Use();
UniformBlock(draw_prog, "OffsetBlock").Binding(0);
cube_pos<< BufferIndexedTarget::Uniform << 0
<< BufferUsage::StaticDraw
<< OffsetData(n);
ProgramUniformSampler(screen_prog, "Palette").Set(0);
Texture::Active(0);
palette << Texture::Target::_1D
<< TextureFilter::Nearest
<< TextureWrap::ClampToEdge
<< images::LinearGradient(
16,
Vec3f(0, 0, 0),
std::map<GLfloat, Vec3f>({
{ 0.0/16.0, Vec3f(0.0, 0.0, 0.0)},
{ 1.0/16.0, Vec3f(0.5, 0.0, 1.0)},
{ 3.0/16.0, Vec3f(0.0, 0.0, 1.0)},
{ 6.0/16.0, Vec3f(0.0, 0.6, 0.6)},
{ 8.0/16.0, Vec3f(0.0, 1.0, 0.0)},
{ 11.0/16.0, Vec3f(0.6, 0.6, 0.0)},
{ 13.0/16.0, Vec3f(1.0, 0.1, 0.0)},
{ 16.0/16.0, Vec3f(0.7, 0.0, 0.0)}
})
);
ProgramUniformSampler(screen_prog, "Tex").Set(1);
Texture::Active(1);
tex << Texture::Target::Rectangle
<< TextureMinFilter::Nearest
<< TextureMagFilter::Nearest
<< TextureWrap::ClampToEdge
<< images::ImageSpec(
64, 64,
Format::Red,
InternalFormat::R8,
DataType::UnsignedByte
);
rbo << Renderbuffer::Target::Renderbuffer
<< images::ImageSpec(64, 64, InternalFormat::DepthComponent);
fbo << Framebuffer::Target::Draw
<< FramebufferAttachment::Color << tex
<< FramebufferAttachment::Depth << rbo
<< FramebufferComplete();
gl.ClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::CullFace);
}
void init_offsets(void)
{
std::vector<GLfloat> offset_data(side*side*2);
auto p = offset_data.begin();
for(GLuint j=0; j!=side; ++j)
{
GLfloat v = j/GLfloat(side-1) - 0.5f;
for(GLuint i=0; i!=side; ++i)
{
GLfloat u = i/GLfloat(side-1) - 0.5f;
*p++ = u*side;
*p++ = v*side;
}
}
ProgramUniformSampler(display_prog, "Offsets").Set(0);
ProgramUniformSampler(shadow_prog, "Offsets").Set(0);
offsets.target = Texture::Target::_2D;
offsets.BindMulti(0, Texture::Target::_2D);
offsets.Image2D(
0,
PixelDataInternalFormat::RG32F,
side, side,
0,
PixelDataFormat::RG,
PixelDataType::Float,
offset_data.data()
);
offsets.MinFilter(TextureMinFilter::Nearest);
offsets.MagFilter(TextureMagFilter::Nearest);
offsets.WrapS(TextureWrap::ClampToBorder);
offsets.WrapT(TextureWrap::ClampToBorder);
}
LiquidExample(const ExampleParams& params)
: liquid_prog()
, grid(liquid_prog, params.quality)
, grid_repeat(int(1 + params.quality*2))
{
Texture::Active(1);
{
auto image = images::Squares(512, 512, 0.9f, 8, 8);
auto bound_tex = gl.Bound(Texture::Target::CubeMap, env_map);
for(int i=0; i!=6; ++i)
Texture::ImageCM(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);
}
ProgramUniformSampler(liquid_prog, "EnvMap").Set(1);
const Vec3f light_position(12.0, 1.0, 8.0);
liquid_prog.light_position.Set(light_position);
gl.ClearColor(0.7f, 0.65f, 0.55f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(FaceOrientation::CW);
gl.CullFace(Face::Back);
}
void init_shadows(void)
{
ProgramUniformSampler(display_prog, "Shadows").Set(2);
shadows.target = Texture::Target::_2D;
shadows.BindMulti(2, Texture::Target::_2D);
shadows.Image2D(
0,
PixelDataInternalFormat::DepthComponent32,
shadow_size, shadow_size,
0,
PixelDataFormat::DepthComponent,
PixelDataType::Float,
nullptr
);
shadows.BorderColor(Vec4f(1,1,1,1));
shadows.MinFilter(TextureMinFilter::Linear);
shadows.MagFilter(TextureMagFilter::Linear);
shadows.WrapS(TextureWrap::ClampToBorder);
shadows.WrapT(TextureWrap::ClampToBorder);
shadows.CompareMode(TextureCompareMode::CompareRefToTexture);
shadows_fbo.target = Framebuffer::Target::Draw;
shadows_fbo.AttachTexture(FramebufferAttachment::Depth, shadows, 0);
shadows_fbo.Complete();
}
AmbiOcclMaps(const images::Image& smaps, const Program& prog)
{
ProgramUniformSampler(prog, "AmbiOcclMaps").Set(0);
this->BindMulti(0, Texture::Target::_2DArray);
this->Image3D(smaps);
this->MinFilter(TextureMinFilter::Linear);
this->MagFilter(TextureMagFilter::Linear);
this->WrapS(TextureWrap::ClampToEdge);
this->WrapT(TextureWrap::ClampToEdge);
}
LiquidExample(const ExampleParams& params)
: liquid_prog()
, grid(liquid_prog, params.quality)
, grid_repeat(1 + params.quality*2)
{
Texture::Active(0);
{
auto image = images::NewtonFractal(
256, 256,
Vec3f(0.1f, 0.1f, 0.1f),
Vec3f(1.0f, 1.0f, 1.0f),
Vec2f(-1.0f, -1.0f),
Vec2f( 1.0f, 1.0f),
images::NewtonFractal::X4Minus1(),
images::NewtonFractal::DefaultMixer()
);
auto bound_tex = oglplus::Context::Bound(
Texture::Target::CubeMap,
env_map
);
for(int i=0; i!=6; ++i)
Texture::ImageCM(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);
}
ProgramUniformSampler(liquid_prog, "EnvMap").Set(0);
const Vec3f light_position(12.0, 1.0, 8.0);
liquid_prog.light_position.Set(light_position);
gl.ClearColor(0.7f, 0.65f, 0.55f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(FaceOrientation::CW);
gl.CullFace(Face::Back);
}
DataBuffer(const Program& prog, GLuint tex_unit, GLuint width, GLuint height)
{
Texture::Active(tex_unit);
ProgramUniformSampler(prog, "DataMap").Set(tex_unit);
tex << Texture::Target::Rectangle
<< TextureFilter::Linear
<< TextureWrap::ClampToEdge
<< images::ImageSpec(
width, height,
Format::RGBA,
InternalFormat::RGBA32F,
PixelDataType::Float
);
rbo << Renderbuffer::Target::Renderbuffer
<< images::ImageSpec(width, height, InternalFormat::DepthComponent32);
fbo << Framebuffer::Target::Draw
<< FramebufferAttachment::Color << tex
<< FramebufferAttachment::Depth << rbo
<< FramebufferComplete();
}
DepthBuffer(const Program& prog, GLuint tex_unit, GLuint tex_side)
: side(tex_side)
{
Texture::Active(tex_unit);
ProgramUniformSampler(prog, "DepthMap").Set(tex_unit);
tex << Texture::Target::_2D
<< TextureFilter::Nearest
<< TextureWrap::ClampToEdge
<< images::ImageSpec(
side, side,
Format::DepthComponent,
InternalFormat::DepthComponent32,
PixelDataType::Float
);
rbo << Renderbuffer::Target::Renderbuffer
<< images::ImageSpec(side, side, InternalFormat::R8);
fbo << Framebuffer::Target::Draw
<< FramebufferAttachment::Color << rbo
<< FramebufferAttachment::Depth << tex
<< FramebufferComplete();
}
ReflectionExample()
: make_plane(
Vec3f(), Vec3f(3.0f, 0.0f, 0.0f), Vec3f(0.0f, 0.0f, -3.0f), 15, 15)
, 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_projection_matrix(plane_prog)
, plane_camera_matrix(plane_prog)
, plane_model_matrix(plane_prog)
, shape_projection_matrix(shape_prog)
, shape_camera_matrix(shape_prog)
, shape_model_matrix(shape_prog)
, width(800)
, height(600)
, tex_size_div(2) {
plane_vs.Source(
"#version 140\n"
"uniform vec3 LightPosition;"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"out vec3 vertLightDir;"
"out vec4 vertTexCoord;"
"void main()"
"{"
" gl_Position = ModelMatrix*Position;"
" vertLightDir = LightPosition - gl_Position.xyz;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
" vertTexCoord = gl_Position;"
"}");
plane_vs.Compile();
plane_fs.Source(
"#version 140\n"
"uniform sampler2DRect ReflectTex;"
"uniform vec3 Normal;"
"in vec3 vertLightDir;"
"in vec4 vertTexCoord;"
"out vec3 fragColor;"
"const int n = 5;"
"const int ns = (n*n);"
"const float blur = 0.15/n;"
"void main()"
"{"
" float d = dot(Normal, normalize(vertLightDir));"
" float intensity = 0.5 + pow(1.4*d, 2.0);"
" vec3 color = vec3(0.0, 0.0, 0.0);"
" int n = 2;"
" float pct = 0.5/vertTexCoord.w;"
" for(int y=-n; y!=(n+1); ++y)"
" for(int x=-n; x!=(n+1); ++x)"
" {"
" vec2 coord = vertTexCoord.xy;"
" coord += vec2(blur*x, blur*y);"
" coord *= pct;"
" coord += vec2(0.5, 0.5);"
" coord *= textureSize(ReflectTex);"
" color += texture(ReflectTex, coord).rgb/ns;"
" }"
" fragColor = color*intensity;"
"}");
plane_fs.Compile();
plane_prog.AttachShader(plane_vs);
plane_prog.AttachShader(plane_fs);
plane_prog.Link();
plane_prog.Use();
plane_projection_matrix.BindTo("ProjectionMatrix");
plane_camera_matrix.BindTo("CameraMatrix");
plane_model_matrix.BindTo("ModelMatrix");
Vec3f lightPos(3.0f, 0.5f, 2.0f);
Uniform<Vec3f>(plane_prog, "LightPosition").Set(lightPos);
Uniform<Vec3f>(plane_prog, "Normal").Set(make_plane.Normal());
plane.Bind();
plane_verts.Bind(Buffer::Target::Array);
{
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();
}
//
Texture::Active(1);
gl.Bound(Texture::Target::Rectangle, depth_tex)
.MinFilter(TextureMinFilter::Linear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::ClampToEdge)
.WrapT(TextureWrap::ClampToEdge);
Texture::Active(0);
ProgramUniformSampler(plane_prog, "ReflectTex").Set(0);
gl.Bound(Texture::Target::Rectangle, reflect_tex)
.MinFilter(TextureMinFilter::Linear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::ClampToEdge)
.WrapT(TextureWrap::ClampToEdge);
gl.Bound(Framebuffer::Target::Draw, fbo)
.AttachTexture(FramebufferAttachment::Color, reflect_tex, 0)
.AttachTexture(FramebufferAttachment::Depth, depth_tex, 0);
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 vertColor;"
"void main()"
"{"
" 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;"
" vertColor = vec3(1, 1, 1) - vertNormal;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}");
shape_vs.Compile();
shape_fs.Source(
"#version 140\n"
"in vec3 vertNormal;"
"in vec3 vertLightDir;"
"in vec3 vertLightRefl;"
"in vec3 vertViewDir;"
"in vec3 vertColor;"
"out vec3 fragColor;"
"void main()"
"{"
" 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);"
" fragColor = "
" vertColor * 0.4 + "
" (lt + vertColor)*pow(max(2.5*d, 0.0), 3) + "
" lt * pow(max(s, 0.0), 64);"
"}");
shape_fs.Compile();
shape_prog.AttachShader(shape_vs);
shape_prog.AttachShader(shape_fs);
shape_prog.Link();
shape_prog.Use();
shape_projection_matrix.BindTo("ProjectionMatrix");
shape_camera_matrix.BindTo("CameraMatrix");
shape_model_matrix.BindTo("ModelMatrix");
Uniform<Vec3f>(shape_prog, "LightPosition").Set(lightPos);
shape.Bind();
shape_verts.Bind(Buffer::Target::Array);
{
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();
}
shape_normals.Bind(Buffer::Target::Array);
{
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();
}
//
gl.ClearColor(0.5f, 0.5f, 0.4f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
}
Field(const images::Image& map, const Program& prog)
: gl()
{
const GLuint w = map.Width();
const GLuint h = map.Height();
const GLuint d = map.Depth();
const GLuint c = 3;
radius = std::sqrt(GLfloat(w*w+h*h+d*d))*0.5f;
vert_count = w*h*d;
std::vector<GLfloat> pos_data(w*h*d*c);
std::vector<GLuint> tec_data(w*h*d*c);
GLfloat xo = w * 0.5f;
GLfloat yo = h * 0.5f;
GLfloat zo = d * 0.5f;
for(GLuint z=0; z!=d; ++z)
{
for(GLuint y=0; y!=h; ++y)
{
for(GLuint x=0; x!=w; ++x)
{
GLuint k = z*w*h*c+y*w*c+x*c;
pos_data[k+0] = x-xo;
pos_data[k+1] = y-yo;
pos_data[k+2] = z-zo;
tec_data[k+0] = x;
tec_data[k+1] = y;
tec_data[k+2] = z;
}
}
}
positions.Data(pos_data);
texcoords.Data(tec_data);
DSAVertexArrayAttribEXT(vao, prog, "Position")
.Setup<Vector<GLfloat, 3>>(positions)
.Enable();
DSAVertexArrayAttribEXT(vao, prog, "TexCoord")
.Setup<Vector<GLuint, 3>>(texcoords)
.Enable();
ProgramUniformSampler(prog, "Pattern").Set(1);
pattern.BindMulti(1, Texture::Target::_3D);
pattern.Image3D(map);
pattern.MinFilter(TextureMinFilter::Nearest);
pattern.MagFilter(TextureMagFilter::Nearest);
pattern.WrapS(TextureWrap::ClampToBorder);
pattern.WrapT(TextureWrap::ClampToBorder);
pattern.WrapR(TextureWrap::ClampToBorder);
pattern.BorderColor(Vec4f(0,0,0,1));
ProgramUniformSampler(prog, "FadeMap").Set(2);
fademap.BindMulti(2, Texture::Target::_3D);
fademap.Image3D(images::RandomRedUByte(
map.Width(),
map.Height(),
map.Depth()
));
fademap.MinFilter(TextureMinFilter::Nearest);
fademap.MagFilter(TextureMagFilter::Nearest);
fademap.WrapS(TextureWrap::ClampToBorder);
fademap.WrapT(TextureWrap::ClampToBorder);
fademap.WrapR(TextureWrap::ClampToBorder);
fademap.BorderColor(Vec4f(0,0,0,1));
}
SortProg(void)
: Program(make())
, pass(self(), "Pass")
{
ProgramUniformSampler(self(), "SortNW").Set(0);
}
VolLightExample(void)
: volume_vs(ShaderType::Vertex, ObjectDesc("Volume vertex"))
, plane_vs(ShaderType::Vertex, ObjectDesc("Plane vertex"))
, volume_gs(ShaderType::Geometry, ObjectDesc("Volume geometry"))
, volume_fs(ShaderType::Fragment, ObjectDesc("Volume fragment"))
, plane_fs(ShaderType::Fragment, ObjectDesc("Plane fragment"))
, volume_prog(ObjectDesc("Volume"))
, plane_prog(ObjectDesc("Plane"))
, samples(150)
{
volume_vs.Source(
"#version 330\n"
"in vec4 Position;"
"out float vertZOffs;"
"uniform int SampleCount;"
"uniform mat4 CameraMatrix;"
"uniform vec3 ViewZ;"
"uniform float Size;"
"void main(void)"
"{"
" float hp = (SampleCount-1) * 0.5;"
" vertZOffs = (gl_InstanceID - hp)/hp;"
" gl_Position = vec4("
" Position.xyz +"
" ViewZ*vertZOffs*Size*0.5,"
" 1.0"
" );"
"}"
);
volume_vs.Compile();
volume_gs.Source(
"#version 330\n"
"layout(points) in;"
"layout(triangle_strip, max_vertices = 4) out;"
"uniform mat4 CameraMatrix, ProjectionMatrix;"
"uniform mat4 TexProjectionMatrix;"
"uniform vec3 ViewX, ViewY;"
"uniform float Size;"
"in float vertZOffs[];"
"out vec4 geomTexCoord;"
"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)"
" {"
" vec4 v = vec4("
" gl_in[0].gl_Position.xyz+"
" ViewX * xo[i] * Size+"
" ViewY * yo[j] * Size,"
" 1.0"
" );"
" geomTexCoord = "
" TexProjectionMatrix *"
" v;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix * v;"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
);
volume_gs.Compile();
volume_fs.Source(
"#version 330\n"
"uniform sampler2D LightTex;"
"uniform int SampleCount;"
"in vec4 geomTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" vec2 coord = geomTexCoord.st/geomTexCoord.q;"
" float depth = geomTexCoord.z;"
" if(depth < 0.0) discard;"
" vec4 t = texture(LightTex, coord*0.5 + 0.5);"
" if(t.a == 0.0) discard;"
" float alpha = 10.0*(1.0-t.a)/SampleCount;"
" alpha *= (t.r+t.g+t.b)*0.3333;"
" alpha /= sqrt(depth);"
" fragColor = vec4(t.rgb, alpha);"
"}"
);
volume_fs.Compile();
volume_prog.AttachShader(volume_vs);
volume_prog.AttachShader(volume_gs);
volume_prog.AttachShader(volume_fs);
volume_prog.Link();
volume_prog.Use();
// bind the VAO for the volumes
volume.Bind();
// bind the VBO for the volume positions
volume_pos.Bind(Buffer::Target::Array);
{
GLfloat position[3] = {0.0, 0.0, 0.0};
Buffer::Data(Buffer::Target::Array, 3, position);
VertexArrayAttrib attr(volume_prog, "Position");
attr.Setup<Vec3f>();
attr.Enable();
}
Vec3f lightPos(2.0f, 4.0f, -3.0f);
auto texProjMat =
CamMatrixf::PerspectiveX(Degrees(30), 1.0, 0.3, 20.0) *
CamMatrixf::LookingAt(lightPos, Vec3f(0, 0, 0));
Uniform<GLint>(volume_prog, "SampleCount").Set(samples);
Uniform<GLfloat>(volume_prog, "Size").Set(Length(lightPos));
Uniform<Mat4f>(volume_prog, "TexProjectionMatrix").Set(texProjMat);
plane_vs.Source(
"#version 330\n"
"in vec4 Position;"
"uniform mat4 CameraMatrix, ProjectionMatrix;"
"uniform mat4 TexProjectionMatrix;"
"out vec2 vertChecker;"
"out vec4 vertTexCoord;"
"void main(void)"
"{"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" Position;"
" vertTexCoord = "
" TexProjectionMatrix *"
" Position;"
" vertChecker = Position.xz;"
"}"
);
plane_vs.Compile();
plane_fs.Source(
"#version 330\n"
"uniform sampler2D LightTex;"
"in vec4 vertTexCoord;"
"in vec2 vertChecker;"
"out vec4 fragColor;"
"void main(void)"
"{"
" vec2 coord = vertTexCoord.st/vertTexCoord.q;"
" vec4 t = texture(LightTex, coord*0.5 + 0.5);"
" float i = ("
" 1 +"
" int(vertChecker.x+10) % 2+"
" int(vertChecker.y+10) % 2"
" ) % 2;"
" vec3 color = vec3(0.1, 0.1, 0.1);"
" color += t.rgb * (1.0 - t.a);"
" color *= mix("
" vec3(0.9, 0.9, 1.0), "
" vec3(0.4, 0.4, 0.9), "
" i"
" );"
" fragColor = vec4(color, 1.0);"
"}"
);
plane_fs.Compile();
plane_prog.AttachShader(plane_vs);
plane_prog.AttachShader(plane_fs);
plane_prog.Link();
plane_prog.Use();
Uniform<Mat4f>(plane_prog, "TexProjectionMatrix").Set(texProjMat);
plane.Bind();
// bind the VBO for the plane vertices
plane_pos.Bind(Buffer::Target::Array);
{
GLfloat data[4*3] = {
-9.0f, -4.0f, 9.0f,
-9.0f, -4.0f, -9.0f,
9.0f, -4.0f, 9.0f,
9.0f, -4.0f, -9.0f
};
Buffer::Data(Buffer::Target::Array, 4*3, data);
plane_prog.Use();
VertexArrayAttrib attr(plane_prog, "Position");
attr.Setup<Vec3f>();
attr.Enable();
}
Texture::Active(0);
ProgramUniformSampler(volume_prog, "LightTex").Set(0);
light_tex
<< Texture::Target::_2D
<< TextureMinFilter::LinearMipmapLinear
<< TextureMagFilter::Linear
<< TextureWrap::ClampToBorder
<< Vec4f(0.0f, 0.0f, 0.0f, 0.0f)
<< images::LoadTexture("flower_glass")
<< TextureMipmap();
gl.ClearColor(0.0f, 0.05f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.BlendFunc(BlendFn::SrcAlpha, BlendFn::One);
}
SkyBoxExample()
: sky_box(List("Position").Get(), shapes::SkyBox())
, shape(List("Position")("Normal").Get(), shapes::WickerTorus())
, sky_box_prog()
, sky_box_projection_matrix(sky_box_prog, "ProjectionMatrix")
, sky_box_camera_matrix(sky_box_prog, "CameraMatrix")
, shape_projection_matrix(shape_prog, "ProjectionMatrix")
, shape_camera_matrix(shape_prog, "CameraMatrix")
, shape_model_matrix(shape_prog, "ModelMatrix")
, sky_box_sun_position(sky_box_prog, "SunPosition")
, shape_sun_position(shape_prog, "SunPosition")
, shape_camera_position(shape_prog, "CameraPosition") {
VertexShader sky_box_vs;
sky_box_vs.Source(
"#version 140\n"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"mat4 Matrix = ProjectionMatrix*CameraMatrix;"
"in vec3 Position;"
"out vec3 vertTexCoord;"
"void main()"
"{"
" gl_Position = Matrix * vec4(Position * 100.0, 1.0);"
" vertTexCoord = Position;"
"}");
sky_box_vs.Compile();
sky_box_prog.AttachShader(sky_box_vs);
VertexShader shape_vs;
shape_vs.Source(
"#version 140\n"
"uniform vec3 SunPosition;"
"uniform vec3 CameraPosition;"
"uniform mat4 ProjectionMatrix,CameraMatrix,ModelMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertNormal, vertViewRefl, vertLightDir;"
"void main()"
"{"
" gl_Position = ModelMatrix * Position;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertViewRefl = reflect("
" gl_Position.xyz - CameraPosition,"
" vertNormal"
" );"
" vertLightDir = SunPosition - gl_Position.xyz;"
" gl_Position = ProjectionMatrix*CameraMatrix*gl_Position;"
"}");
shape_vs.Compile();
shape_prog.AttachShader(shape_vs);
FragmentShader sky_box_fs;
sky_box_fs.Source(
"#version 140\n"
"in vec3 vertTexCoord;"
"out vec3 fragColor;"
"vec3 sky_color(vec3 vd);"
"void main()"
"{"
" fragColor = sky_color(normalize(vertTexCoord));"
"}");
sky_box_fs.Compile();
sky_box_prog.AttachShader(sky_box_fs);
FragmentShader shape_fs;
shape_fs.Source(
"#version 140\n"
"in vec3 vertNormal, vertViewRefl, vertLightDir;"
"out vec3 fragColor;"
"vec3 sky_color(vec3 vd);"
"void main()"
"{"
" float l = max(dot(normalize(vertNormal), "
"normalize(vertLightDir))+0.1, 0.0);"
" float a = 0.1;"
" fragColor = "
" 0.1*vec3(1.0, 1.0, 1.0)*(a+l)+"
" 0.9*sky_color(normalize(vertViewRefl));"
"}");
shape_fs.Compile();
shape_prog.AttachShader(shape_fs);
FragmentShader sky_fs;
sky_fs.Source(
"#version 140\n"
"const float WorldRadius = 6371000;"
"const float AtmThickness = 50000;"
"const vec3 AirColor = vec3(0.32, 0.36, 0.45);"
"const vec3 LightColor = vec3(1.0, 1.0, 1.0);"
"uniform vec3 SunPosition;"
"uniform samplerCube EnvMap;"
"float atm_intersection(vec3 v)"
"{"
" const vec3 c = vec3(0.0, -WorldRadius, 0.0);"
" const float r = WorldRadius + AtmThickness;"
" const float c_c = dot(-c, -c);"
" float v_c = dot( v, -c);"
" return (-v_c + sqrt(v_c*v_c - c_c + r*r))/AtmThickness;"
"}"
"vec3 sky_color(vec3 vd)"
"{"
" vec3 up = vec3(0.0, 1.0, 0.0);"
" vec3 ld = normalize(SunPosition);"
" vec4 cl = texture(EnvMap, vd);"
" float ai = atm_intersection(vd);"
" float al = max(dot(ld, up) + 0.12, 0.0);"
" float vl = max(dot(vd, ld), 0.0);"
" float ct = (1.0-cl.a)*cl.b;"
" vec3 ac = max(LightColor-AirColor*pow(ai, 0.33), vec3(0.0, 0.0, "
"0.0));"
" vec3 Sun = "
" ac*(vl>0.995+0.004*al ? 1.0:0.0);"
" vec3 Air = "
" min(AirColor*sqrt(pow(al,0.25)*ai), vec3(al, al, al)*1.5)+"
" ac*pow(min(vl+0.001*ai, 1.0), 1024.0/pow(ai, 2.0))+"
" ac*(vl/(1.0+pow(3.0*al, 8.0)))*pow(ai, 0.6)*0.5;"
" vec3 Clouds ="
" ac*pow(min(vl*(cl.g+cl.b), 1.015), 64.0)*pow(ct, 2.0)+"
" ac*pow(min(vl*cl.g+cl.b, 1.020), 32.0)*ct+"
" ac*pow(min(vl*cl.g*cl.b, 1.010), 16.0)*pow(ct, 0.5)+"
" ac*0.7*min(cl.g + cl.b*0.5, 1.0)*al+"
" ac*(cl.g*(1.0-cl.b*0.2)*5.0)*pow(1.0-al, 2.0)*(al)+"
" LightColor*0.5*min(al + cl.g*0.4+cl.b*0.1, 1.0)*sqrt(al);"
" return mix(Air, Clouds, cl.a*(1.0-cl.r*0.8))+Sun*(1.0-cl.a);"
"}");
sky_fs.Compile();
sky_box_prog.AttachShader(sky_fs);
shape_prog.AttachShader(sky_fs);
sky_box_prog.Link();
sky_box.UseInProgram(sky_box_prog);
shape_prog.Link();
shape.UseInProgram(shape_prog);
{
ProgramUniformSampler(sky_box_prog, "EnvMap").Set(0);
ProgramUniformSampler(shape_prog, "EnvMap").Set(0);
Texture::Active(0);
gl.Bound(Texture::Target::CubeMap, env_map)
.MinFilter(TextureMinFilter::Linear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::ClampToEdge)
.WrapT(TextureWrap::ClampToEdge)
.WrapR(TextureWrap::ClampToEdge);
Texture::ImageCM(
0, images::LoadTexture("clouds01-cm_0", false, false));
Texture::ImageCM(
1, images::LoadTexture("clouds01-cm_1", false, false));
Texture::ImageCM(
2, images::LoadTexture("clouds01-cm_2", false, false));
Texture::ImageCM(
3, images::LoadTexture("clouds01-cm_3", false, false));
Texture::ImageCM(
4, images::LoadTexture("clouds01-cm_4", false, false));
Texture::ImageCM(
5, images::LoadTexture("clouds01-cm_5", false, false));
}
gl.ClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}