void Render(double time)
{
gl.ClearDepth(0.0f);
gl.Clear().DepthBuffer();
auto camera =
CamMatrixf::Orbiting(
objects.BoundingSphere().Center(),
objects.BoundingSphere().Radius()*2.8,
FullCircles(time / 19.0),
Degrees(SineWave(time / 17.0) * 90)
);
depth_prog.Use();
gl.DepthFunc(CompareFn::Greater);
gl.CullFace(Face::Front);
depth_prog.camera_matrix.Set(camera);
depth_prog.model_matrix.Set(Mat4f());
objects.Draw();
Texture::CopyImage2D(
Texture::Target::Rectangle,
0,
PixelDataInternalFormat::DepthComponent,
0, 0,
width,
height,
0
);
gl.ClearDepth(1.0f);
gl.Clear().ColorBuffer().DepthBuffer();
draw_prog.Use();
gl.DepthFunc(CompareFn::Less);
gl.CullFace(Face::Back);
draw_prog.camera_matrix.Set(camera);
draw_prog.model_matrix.Set(Mat4f());
objects.Draw();
}
TorusExample(void)
: make_torus(1.0, 0.5, 18, 36)
, torus_instr(make_torus.Instructions())
, torus_indices(make_torus.Indices())
, transf_prog(make_transf_prog())
, face_prog(make_face_prog())
, frame_prog(make_frame_prog())
, projection_matrix(transf_prog, "ProjectionMatrix")
, camera_matrix(transf_prog, "CameraMatrix")
, model_matrix(transf_prog, "ModelMatrix")
, transf_time(transf_prog, "Time")
{
transf_prog.Use();
torus.Bind();
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(transf_prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(transf_prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
texcoords.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.TexCoordinates(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(transf_prog, "TexCoord");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
face_pp.Bind();
face_prog.Use();
face_pp.UseStages(transf_prog).Vertex().Geometry();
face_pp.UseStages(face_prog).Fragment();
frame_pp.Bind();
frame_prog.Use();
frame_pp.UseStages(transf_prog).Vertex().Geometry();
frame_pp.UseStages(frame_prog).Fragment();
gl.Bind(NoProgramPipeline());
gl.Use(NoProgram());
gl.ClearColor(0.7f, 0.6f, 0.5f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.DepthFunc(CompareFn::Less);
gl.FrontFace(make_torus.FaceWinding());
}
SketchExample(void)
: transf_prog()
, sketch_prog()
, plane(
transf_prog,
shapes::Plane(
Vec3f(0, 0, 0),
Vec3f(9, 0, 0),
Vec3f(0, 0,-9),
9, 9
)
), torus(transf_prog, shapes::WickerTorus())
, sketch_tex_layers(8)
, shadow_tex_side(1024)
{
NoProgram().Use();
shadow_pp.Bind();
shadow_pp.UseStages(transf_prog).Vertex();
shadow_pp.UseStages(shadow_prog).Fragment();
sketch_pp.Bind();
sketch_pp.UseStages(transf_prog).Vertex();
sketch_pp.UseStages(sketch_prog).Fragment();
line_pp.Bind();
line_pp.UseStages(transf_prog).Vertex();
line_pp.UseStages(line_prog).Geometry().Fragment();
Texture::Active(0);
sketch_prog.sketch_tex.Set(0);
{
auto bound_tex = gl.Bound(Texture::Target::_3D, sketch_texture);
for(GLuint i=0; i<sketch_tex_layers; ++i)
{
auto image = images::BrushedMetalUByte(
512, 512,
64 + i*128,
-(2+i*4), +(2+i*4),
64, 256-i*4
);
if(i == 0)
{
bound_tex.Image3D(
0,
PixelDataInternalFormat::RGB,
image.Width(),
image.Height(),
sketch_tex_layers,
0,
image.Format(),
image.Type(),
nullptr
);
}
bound_tex.SubImage3D(
0,
0, 0, i,
image.Width(),
image.Height(),
1,
image.Format(),
image.Type(),
image.RawData()
);
}
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::Repeat);
bound_tex.WrapT(TextureWrap::Repeat);
bound_tex.WrapR(TextureWrap::ClampToEdge);
}
Texture::Active(1);
sketch_prog.shadow_tex.Set(1);
gl.Bound(Texture::Target::_2D, shadow_tex)
.MinFilter(TextureMinFilter::Linear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::ClampToEdge)
.WrapT(TextureWrap::ClampToEdge)
.CompareMode(TextureCompareMode::CompareRefToTexture)
.Image2D(
0,
PixelDataInternalFormat::DepthComponent32,
shadow_tex_side, shadow_tex_side,
0,
PixelDataFormat::DepthComponent,
PixelDataType::Float,
nullptr
);
gl.Bound(Framebuffer::Target::Draw, frame_shadow_fbo)
.AttachTexture(
FramebufferAttachment::Depth,
shadow_tex,
0
);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.DepthFunc(CompareFn::LEqual);
gl.BlendFunc(BlendFn::SrcAlpha, BlendFn::OneMinusSrcAlpha);
gl.PolygonOffset(1.0, 1.0);
gl.LineWidth(1.5);
}
TorusExample(void)
: make_torus(1.0, 0.5, 18, 36)
, torus_instr(make_torus.Instructions())
, torus_indices(make_torus.Indices())
, vs(ObjectDesc("Vertex"))
, gs(ObjectDesc("Geometry"))
, face_fs(ObjectDesc("Face fragment"))
, frame_fs(ObjectDesc("Frame fragment"))
, transf_prog(ObjectDesc("Transformation"))
, face_prog(ObjectDesc("Face"))
, frame_prog(ObjectDesc("Frame"))
, projection_matrix(transf_prog, "ProjectionMatrix")
, camera_matrix(transf_prog, "CameraMatrix")
, model_matrix(transf_prog, "ModelMatrix")
, transf_time(transf_prog, "Time")
{
vs.Source(
"#version 330\n"
"uniform mat4 ModelMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"in vec2 TexCoord;"
"out gl_PerVertex {"
" vec4 gl_Position;"
"};"
"out vec3 vertNormal;"
"out vec2 vertTexCoord;"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" vertNormal = (ModelMatrix*vec4(Normal,0.0)).xyz;"
" vertTexCoord = TexCoord;"
"}"
);
vs.Compile();
gs.Source(
"#version 330\n"
"layout(triangles) in;"
"layout(triangle_strip, max_vertices = 15) out;"
"uniform mat4 CameraMatrix, ProjectionMatrix;"
"uniform vec3 LightPos;"
"uniform float Time;"
"in gl_PerVertex {"
" vec4 gl_Position;"
"} gl_in[];"
"in vec3 vertNormal[];"
"in vec2 vertTexCoord[];"
"out gl_PerVertex {"
" vec4 gl_Position;"
"};"
"out vec3 geomNormal;"
"out vec3 geomLight;"
"out float geomGlow;"
"flat out int geomTop;"
"void main(void)"
"{"
" vec3 FaceNormal = normalize("
" vertNormal[0]+"
" vertNormal[1]+"
" vertNormal[2] "
" );"
" vec2 FaceCoord = 0.33333 * ("
" vertTexCoord[0]+"
" vertTexCoord[1]+"
" vertTexCoord[2] "
" );"
" float Offs = (sin((FaceCoord.s + Time/10.0)* 3.14 * 2.0 * 10)*0.5 + 0.5)*0.4;"
" Offs *= cos(FaceCoord.t * 3.1415 * 2.0)*0.5 + 0.51;"
" vec3 pos[3], norm[3];"
" for(int i=0; i!=3; ++i)"
" pos[i] = gl_in[i].gl_Position.xyz;"
" for(int i=0; i!=3; ++i)"
" norm[i] = cross("
" FaceNormal, "
" normalize(pos[(i+1)%3] - pos[i])"
" );"
" vec3 pofs = FaceNormal * Offs;"
" geomTop = 0;"
" for(int i=0; i!=3; ++i)"
" {"
" geomNormal = norm[i];"
" for(int j=0; j!=2; ++j)"
" {"
" vec3 tpos = pos[(i+j)%3];"
" geomLight = LightPos-tpos;"
" geomGlow = 1.0;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" vec4(tpos, 1.0);"
" EmitVertex();"
" geomGlow = 0.7;"
" geomLight = LightPos-tpos+pofs;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" vec4(tpos + pofs, 1.0);"
" EmitVertex();"
" }"
" EndPrimitive();"
" }"
" geomGlow = 0.0;"
" geomTop = 1;"
" for(int i=0; i!=3; ++i)"
" {"
" geomLight = LightPos - (pos[i]+pofs);"
" geomNormal = vertNormal[i];"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" vec4(pos[i] + pofs, 1.0);"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
);
gs.Compile();
transf_prog.AttachShader(vs);
transf_prog.AttachShader(gs);
transf_prog.MakeSeparable();
transf_prog.Link();
transf_prog.Use();
ProgramUniform<Vec3f>(transf_prog, "LightPos").Set(4, 4, -8);
torus.Bind();
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(transf_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_torus.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(transf_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_torus.TexCoordinates(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(transf_prog, "TexCoord");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
face_fs.Source(
"#version 330\n"
"in vec3 geomNormal;"
"in vec3 geomLight;"
"in float geomGlow;"
"flat in int geomTop;"
"uniform vec3 TopColor, SideColor;"
"const vec3 LightColor = vec3(1.0, 1.0, 1.0);"
"out vec4 fragColor;"
"void main(void)"
"{"
" float d = max(dot("
" normalize(geomLight),"
" normalize(geomNormal)"
" ), 0.0);"
" vec3 color;"
" if(geomTop != 0)"
" {"
" color = TopColor * d +"
" LightColor * pow(d, 8.0);"
" }"
" else"
" {"
" color = SideColor * geomGlow +"
" LightColor *"
" pow(d, 2.0) * 0.2;"
" }"
" fragColor = vec4(color, 1.0);"
"}"
);
face_fs.Compile();
face_prog.AttachShader(face_fs);
face_prog.MakeSeparable();
face_prog.Link();
ProgramUniform<Vec3f>(face_prog, "TopColor").Set(0.2f, 0.2f, 0.2f);
ProgramUniform<Vec3f>(face_prog, "SideColor").Set(0.9f, 0.9f, 0.2f);
face_pp.Bind();
face_prog.Use();
face_pp.UseStages(transf_prog).Vertex().Geometry();
face_pp.UseStages(face_prog).Fragment();
frame_fs.Source(
"#version 330\n"
"out vec4 fragColor;"
"void main(void)"
"{"
" fragColor = vec4(0.2, 0.1, 0.0, 1.0);"
"}"
);
frame_fs.Compile();
frame_prog.AttachShader(frame_fs);
frame_prog.MakeSeparable();
frame_prog.Link();
frame_pp.Bind();
frame_prog.Use();
frame_pp.UseStages(transf_prog).Vertex().Geometry();
frame_pp.UseStages(frame_prog).Fragment();
ProgramPipeline::Unbind();
Program::UseNone();
gl.ClearColor(0.7f, 0.6f, 0.5f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.DepthFunc(CompareFn::Less);
gl.FrontFace(make_torus.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);
}
TorusExample(void)
: make_torus(1.0, 0.5, 12, 12)
, torus_instr(make_torus.Instructions())
, torus_indices(make_torus.Indices())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
, light_pos_cam(prog, "LightPosCam")
, front_color(prog, "FrontColor")
, back_color(prog, "BackColor")
{
vs.Source(
"#version 330\n"
"uniform mat4 ModelMatrix, CameraMatrix;"
"in vec4 Position;"
"void main(void)"
"{"
" gl_Position = CameraMatrix *"
" ModelMatrix * Position;"
"}"
);
vs.Compile();
gs.Source(
"#version 330\n"
"layout(triangles) in;"
"layout(triangle_strip, max_vertices = 8) out;"
"uniform mat4 ProjectionMatrix;"
"uniform vec4 LightPosCam;"
"out vec3 geomLightDir;"
"out float geomOpacity;"
"void main(void)"
"{"
" vec4 c = vec4(("
" gl_in[0].gl_Position.xyz+"
" gl_in[1].gl_Position.xyz+"
" gl_in[2].gl_Position.xyz "
" ) * 0.333333, 1.0);"
" for(int v = 0; v != 4; ++v)"
" {"
" vec4 b = gl_in[v%3].gl_Position;"
" vec4 a = vec4("
" b.xyz + (c.xyz - b.xyz)*0.3,"
" 1.0"
" );"
" gl_Position = ProjectionMatrix * a;"
" geomLightDir = (LightPosCam - a).xyz;"
" geomOpacity = 1.0;"
" EmitVertex();"
" gl_Position = ProjectionMatrix * b;"
" geomLightDir = (LightPosCam - b).xyz;"
" geomOpacity = 0.0;"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
);
gs.Compile();
fs.Source(
"#version 330\n"
"in vec3 geomLightDir;"
"in float geomOpacity;"
"uniform vec3 FrontColor, BackColor;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = length(geomLightDir);"
" vec3 color = gl_FrontFacing?"
" FrontColor:"
" BackColor;"
" fragColor = vec4(color*(4.0/l), geomOpacity);"
"}"
);
fs.Compile();
prog.AttachShader(vs);
prog.AttachShader(gs);
prog.AttachShader(fs);
prog.Link();
torus.Bind();
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
prog.Use();
VertexAttribArray attr(prog, "Position");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
gl.ClearColor(0.8f, 0.7f, 0.6f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.DepthFunc(CompareFn::LEqual);
gl.FrontFace(make_torus.FaceWinding());
}
