double Draw(double time)
{
assert(!shapes.empty());
assert(ishape != shapes.end());
shapes::ShapeWrapper& shape = *ishape;
const double interval = 11.0;
double segment = time - shape_time;
double fade = segment*(interval-segment);
fade -= 1.0;
if(fade < 0.0) fade = 0.0;
fade = std::sqrt(fade/interval);
if(fade > 1.0) fade = 1.0;
if(segment > interval)
{
if(++ishape == shapes.end())
{
ishape = shapes.begin();
}
shape_time = time;
}
gl.Clear().DepthBuffer();
float dist = (1.0+SineWave(time / 13.0))*2.5;
projection_matrix.Set(
CamMatrixf::PerspectiveX(
Degrees(45),
1.0,
1.0+dist,
shape.BoundingSphere().Radius()*2.0+1.0+dist
)
);
camera_matrix.Set(
CamMatrixf::Orbiting(
Vec3f(),
shape.BoundingSphere().Radius()+1.5+dist,
FullCircles(time / 27.0),
Degrees(SineWave(time / 23.0) * 89)
)
);
model_matrix.Set(
ModelMatrixf::RotationA(
Vec3f(1,1,1),
FullCircles(time /-37.0)
)
);
prog.Use();
shape.Use();
shape.Draw();
return fade;
}
void Render(double time)
{
fbo.Bind(Framebuffer::Target::Draw);
gl.Clear().ColorBuffer().DepthBuffer();
main_prog.Use();
cube.Bind();
camera_matrix.Set(
CamMatrixf::Orbiting(
Vec3f(),
20.5,
FullCircles(time / 20.0),
Degrees(SineWave(time / 25.0) * 30)
)
);
auto i = cube_matrices.begin(), e = cube_matrices.end();
while(i != e)
{
model_matrix.Set(*i);
ambient_color.Set(0.7f, 0.6f, 0.2f);
diffuse_color.Set(1.0f, 0.8f, 0.3f);
face_instr.Draw(face_indices);
ambient_color.Set(0.1f, 0.1f, 0.1f);
diffuse_color.Set(0.3f, 0.3f, 0.3f);
edge_instr.Draw(edge_indices);
++i;
}
dfb.Bind(Framebuffer::Target::Draw);
gl.Clear().ColorBuffer().DepthBuffer();
dof_prog.Use();
screen.Bind();
focus_depth.Set(0.6 + SineWave(time / 9.0)*0.3);
gl.Enable(Capability::Blend);
gl.DrawArrays(PrimitiveType::TriangleStrip, 0, 4);
gl.Disable(Capability::Blend);
}
void RenderPlane(std::size_t p)
{
gl.Enable(Capability::Blend);
plane_prog.Use();
plane_normal.Set(make_plane[p].Normal());
plane[p].Bind();
plane_instr.Draw(plane_indices);
gl.Disable(Capability::Blend);
}
void Reshape(GLuint vp_width, GLuint vp_height)
{
width = vp_width;
height = vp_height;
tex_side = width < height ? width : height;
gl.Viewport(width, height);
Mat4f projection = CamMatrixf::PerspectiveX(
Degrees(48),
float(width)/height,
1, 15
);
plane_prog.Use();
plane_proj_matrix.Set(projection);
shape_prog.Use();
shape_proj_matrix.Set(projection);
}
void Render(const Mat4f& model)
{
prog.Use();
model_matrix.Set(model);
// bind the VAO
sphere.Bind();
// use the instructions to draw the sphere
// (this basically calls glDrawArrays* or glDrawElements*)
sphere_instr.Draw(sphere_indices);
}
static Program make_prog(void)
{
VertexShader vs;
vs.Source(
"#version 130\n"
"uniform mat4 ProjectionMatrix, ModelMatrix, CameraMatrix;"
"uniform vec4 ClipPlane;"
"attribute vec4 Position;"
"attribute vec2 TexCoord;"
"varying vec2 vertTexCoord;"
"void main(void)"
"{"
" vertTexCoord = TexCoord;"
" gl_Position = "
" ModelMatrix *"
" Position;"
" gl_ClipDistance[0] = dot(ClipPlane, gl_Position);"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" gl_Position;"
"}"
);
vs.Compile();
FragmentShader fs;
fs.Source(
"#version 130\n"
"varying vec2 vertTexCoord;"
"void main(void)"
"{"
" float i = ("
" int(vertTexCoord.x*36) % 2+"
" int(vertTexCoord.y*24) % 2"
" ) % 2;"
" if(gl_FrontFacing)"
" {"
" gl_FragColor = vec4(1-i/2, 1-i/2, 1-i/2, 1.0);"
" }"
" else"
" {"
" gl_FragColor = vec4(0+i/2, 0+i/2, 0+i/2, 1.0);"
" }"
"}"
);
fs.Compile();
Program prog;
prog.AttachShader(vs);
prog.AttachShader(fs);
prog.Link();
prog.Use();
return prog;
}
void Reshape(GLuint width, GLuint height)
{
gl.Viewport(width, height);
auto projection = CamMatrixf::PerspectiveX(
Degrees(60),
double(width)/height,
1, 20
);
prog.Use();
projection_matrix.Set(projection);
}
void Reshape(GLuint width, GLuint height)
{
gl.Viewport(width, height);
prog.Use();
projection_matrix.Set(
CamMatrixf::PerspectiveX(
Degrees(75),
double(width)/height,
1, 30
)
);
}
void Reshape(GLuint width, GLuint height)
{
gl.Viewport(width, height);
prog.Use();
Uniform<Mat4f>(prog, "ProjectionMatrix").Set(
CamMatrixf::PerspectiveX(
Degrees(70),
double(width)/height,
1, 20
)
);
}
void Render(double time)
{
gl.Clear().ColorBuffer().DepthBuffer();
auto camera = CamMatrixf::Orbiting(
Vec3f(),
8.5,
FullCircles(time / 5.0),
Degrees(15 + (-SineWave(time/10.0)+1.0)* 0.5 * 75)
);
ModelMatrixf model =
ModelMatrixf::Translation(0.0f, 2.5f, 0.0) *
ModelMatrixf::RotationA(
Vec3f(1.0f, 1.0f, 1.0f),
FullCircles(time / 7.0)
);
plane_prog.Use();
plane_camera_matrix.Set(camera);
plane.Bind();
gl.DrawArrays(PrimitiveType::TriangleStrip, 0, 4);
shape_prog.Use();
shape_camera_matrix.Set(camera);
shape_model_matrix.Set(model);
shape.Bind();
shape_instr.Draw(shape_indices);
halo_prog.Use();
halo_camera_matrix.Set(camera);
halo_model_matrix.Set(model);
gl.DepthMask(false);
gl.Enable(Capability::Blend);
shape_instr.Draw(shape_indices);
gl.Disable(Capability::Blend);
gl.DepthMask(true);
}
void Render(double time)
{
gl.Clear().ColorBuffer().DepthBuffer();
auto cameraMatrix = CamMatrixf::Orbiting(
Vec3f(0.0f, 3.0f, 0.0f),
8.0f,
FullCircles(time / 12.0),
Degrees(SineWave(time / 20.0) * 80)
);
plane.Bind();
plane_prog.Use();
Uniform<Mat4f>(plane_prog, "CameraMatrix").Set(cameraMatrix);
gl.DrawArrays(PrimitiveType::TriangleStrip, 0, 4);
gl.Enable(Capability::Blend);
volume.Bind();
volume_prog.Use();
Uniform<Mat4f>(volume_prog, "CameraMatrix").Set(cameraMatrix);
Uniform<Vec3f>(volume_prog, "ViewX").Set(
cameraMatrix.Row(0).xyz()
);
Uniform<Vec3f>(volume_prog, "ViewY").Set(
cameraMatrix.Row(1).xyz()
);
Uniform<Vec3f>(volume_prog, "ViewZ").Set(
cameraMatrix.Row(2).xyz()
);
gl.DrawArraysInstanced(
PrimitiveType::Points,
0, 1,
samples
);
gl.Disable(Capability::Blend);
}
void Render(double time)
{
gl.Clear().ColorBuffer().DepthBuffer();
auto lightPos = light_path.Position(time * 0.05);
auto cameraMatrix = CamMatrixf::Orbiting(
Vec3f(),
4.5f,
Degrees(0),
Degrees(SineWave(time / 20.0) * 80)
);
light.Bind();
light_prog.Use();
Uniform<Vec3f>(light_prog, "LightPos").Set(lightPos);
Uniform<Mat4f>(light_prog, "CameraMatrix").Set(cameraMatrix);
sphere_instr.Draw(sphere_indices);
clouds.Bind();
cloud_prog.Use();
Uniform<Vec3f>(cloud_prog, "LightPos").Set(lightPos);
Uniform<Mat4f>(cloud_prog, "CameraMatrix").Set(cameraMatrix);
Uniform<Vec4f>(cloud_prog, "ViewX").Set(cameraMatrix.Row(0));
Uniform<Vec4f>(cloud_prog, "ViewY").Set(cameraMatrix.Row(1));
Uniform<Vec4f>(cloud_prog, "ViewZ").Set(cameraMatrix.Row(2));
for(std::size_t i=0, n=positions.size(); i!=n; ++i)
{
cloud_tex[i].Bind(Texture::Target::_3D);
gl.DrawArraysInstanced(
PrimitiveType::Points,
i, 1,
samples
);
}
}
Particle(const VertexShader& vs, FragmentShader&& frag)
: sphere_instr(make_sphere.Instructions())
, sphere_indices(make_sphere.Indices())
, fs(std::forward<FragmentShader>(frag))
{
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
projection_matrix = (prog/"ProjectionMatrix");
camera_matrix = (prog/"CameraMatrix");
model_matrix = (prog/"ModelMatrix");
light_pos = (prog/"LightPos");
// bind the VAO for the sphere
sphere.Bind();
const GLuint n_attr = 2;
// pointers to the vertex attribute data build functions
typedef GLuint (shapes::Sphere::*Func)(std::vector<GLfloat>&) const;
Func func[n_attr] = {
&shapes::Sphere::Positions,
&shapes::Sphere::Normals,
};
// managed references to the VBOs
Reference<Buffer> vbo[n_attr] = {verts, normals};
// vertex attribute identifiers from the shaders
const GLchar* ident[n_attr] = {"Position", "Normal"};
for(GLuint i=0; i!=n_attr; ++i)
{
// bind the VBO
vbo[i].Bind(Buffer::Target::Array);
// make the data
std::vector<GLfloat> data;
GLuint n_per_vertex = (make_sphere.*func[i])(data);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
// setup the vertex attrib
VertexArrayAttrib attr(prog, ident[i]);
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
}
void Use(void)
{
gl.ClearDepth(1.0f);
gl.ClearColor(0.8f, 0.8f, 0.8f, 0.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.CullFace(Face::Back);
dfb.Bind(Framebuffer::Target::Draw);
gl.Viewport(width, height);
prog.Use();
cube.Use();
SetProjection();
}
void Use(void)
{
gl.ClearDepth(1.0f);
gl.ClearColor(0.9f, 0.4f, 0.4f, 1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.CullFace(Face::Back);
fbo.Bind(Framebuffer::Target::Draw);
gl.Viewport(tex_side, tex_side);
prog.Use();
shape.Use();
projection_matrix.Set(CamMatrixf::PerspectiveX(Degrees(48), 1.0, 1, 100));
}
void Render(
const Vec3f& light,
const Mat4f& camera,
const Mat4f& model
)
{
// use the shading program
prog.Use();
// set the uniforms
light_pos.Set(light);
camera_matrix.Set(camera);
model_matrix.Set(model);
// bind the VAO
shape.Bind();
// use the instructions to draw the shape
// (this basically calls glDrawArrays* or glDrawElements*)
shape_instr.Draw(shape_indices);
}
void Uniform::Bind(const Program& program, const std::string& name, const Vector4& value)
{
GLint location = program[name];
if (location != -1)
{
if (Program::msCurrentlyInUse == program.mProgram)
glUniform4fv(location, 1, value);
else
{
GLint current;
glGetIntegerv(GL_CURRENT_PROGRAM, ¤t);
program.Use();
glUniform3fv(location, 1, value);
glUseProgram(current);
Program::msCurrentlyInUse = current;
}
}
checkOpenGLError("Failed to bind uniform " + name);
}
void Game::SwapBuffers() {
Program* p = this->_blitProgram;
if (this->_paused) {
p = this->_blitProgramMap["Sepia"];
}
if (p != NULL && p->ProgramId != 0) {
p->Use();
p->BindTextures();
if (this->_paused) {
p->SetUniform("sepiaRgb", vec3(1.2f, 1.0f, 0.8f));
}
p->SetUniform("iGlobalTime", (float)this->_totalTicks);
p->SetUniform("MVP", GLFuncs::GetInstance()->StaticProjection);
p->SetUniform("iResolution", vec2(this->_g->DisplayWidth, this->_g->DisplayHeight));
}
this->_g->SwapBuffers();
}
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);
}
ReflectionExample(void)
: torus_indices(make_torus.Indices())
, torus_instr(make_torus.Instructions())
, vs_norm(ObjectDesc("Vertex-Normal"))
, vs_refl(ObjectDesc("Vertex-Reflection"))
, gs_refl(ObjectDesc("Geometry-Reflection"))
{
namespace se = oglplus::smart_enums;
// Set the normal object vertex shader source
vs_norm.Source(
"#version 330\n"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 geomColor;"
"out vec3 geomNormal;"
"out vec3 geomLight;"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" geomColor = Normal;"
" geomNormal = mat3(ModelMatrix)*Normal;"
" geomLight = LightPos-gl_Position.xyz;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
// compile it
vs_norm.Compile();
// Set the reflected object vertex shader source
// which just passes data to the geometry shader
vs_refl.Source(
"#version 330\n"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertNormal;"
"void main(void)"
"{"
" gl_Position = Position;"
" vertNormal = Normal;"
"}"
);
// compile it
vs_refl.Compile();
// Set the reflected object geometry shader source
// This shader creates a reflection matrix that
// relies on the fact that the reflection is going
// to be done by the y-plane
gs_refl.Source(
"#version 330\n"
"layout(triangles) in;"
"layout(triangle_strip, max_vertices = 6) out;"
"in vec3 vertNormal[];"
"uniform mat4 ProjectionMatrix;"
"uniform mat4 CameraMatrix;"
"uniform mat4 ModelMatrix;"
"out vec3 geomColor;"
"out vec3 geomNormal;"
"out vec3 geomLight;"
"uniform vec3 LightPos;"
"mat4 ReflectionMatrix = 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(int v=0; v!=gl_in.length(); ++v)"
" {"
" vec4 Position = gl_in[v].gl_Position;"
" gl_Position = ModelMatrix * Position;"
" geomColor = vertNormal[v];"
" geomNormal = mat3(ModelMatrix)*vertNormal[v];"
" geomLight = LightPos - gl_Position.xyz;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" ReflectionMatrix *"
" gl_Position;"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
);
// compile it
gs_refl.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"in vec3 geomColor;"
"in vec3 geomNormal;"
"in vec3 geomLight;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = length(geomLight);"
" float d = l > 0.0 ? dot("
" geomNormal, "
" normalize(geomLight)"
" ) / l : 0.0;"
" float i = 0.2 + max(d, 0.0) * 2.0;"
" fragColor = vec4(abs(geomNormal)*i, 1.0);"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the normal rendering program
prog_norm.AttachShader(vs_norm);
prog_norm.AttachShader(fs);
// link it
prog_norm.Link();
// attach the shaders to the reflection rendering program
prog_refl.AttachShader(vs_refl);
prog_refl.AttachShader(gs_refl);
prog_refl.AttachShader(fs);
// link it
prog_refl.Link();
// bind the VAO for the torus
torus.Bind();
// bind the VBO for the torus vertices
torus_verts.Bind(se::Array());
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.Positions(data);
// upload the data
Buffer::Data(se::Array(), data);
// setup the vertex attribs array for the vertices
typedef VertexAttribArray VAA;
VertexAttribSlot
loc_norm = VAA::GetLocation(prog_norm, "Position"),
loc_refl = VAA::GetLocation(prog_refl, "Position");
assert(loc_norm == loc_refl);
VertexAttribArray attr(loc_norm);
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// bind the VBO for the torus normals
torus_normals.Bind(se::Array());
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.Normals(data);
// upload the data
Buffer::Data(se::Array(), data);
// setup the vertex attribs array for the normals
typedef VertexAttribArray VAA;
VertexAttribSlot
loc_norm = VAA::GetLocation(prog_norm, "Normal"),
loc_refl = VAA::GetLocation(prog_refl, "Normal");
assert(loc_norm == loc_refl);
VertexAttribArray attr(loc_norm);
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// bind the VAO for the plane
plane.Bind();
// bind the VBO for the plane vertices
plane_verts.Bind(se::Array());
{
GLfloat data[4*3] = {
-2.0f, 0.0f, 2.0f,
-2.0f, 0.0f, -2.0f,
2.0f, 0.0f, 2.0f,
2.0f, 0.0f, -2.0f
};
// upload the data
Buffer::Data(se::Array(), 4*3, data);
// setup the vertex attribs array for the vertices
prog_norm.Use();
VertexAttribArray attr(prog_norm, "Position");
attr.Setup<Vec3f>();
attr.Enable();
}
// bind the VBO for the torus normals
plane_normals.Bind(se::Array());
{
GLfloat data[4*3] = {
-0.1f, 1.0f, 0.1f,
-0.1f, 1.0f, -0.1f,
0.1f, 1.0f, 0.1f,
0.1f, 1.0f, -0.1f
};
// upload the data
Buffer::Data(se::Array(), 4*3, data);
// setup the vertex attribs array for the normals
prog_norm.Use();
VertexAttribArray attr(prog_norm, "Normal");
attr.Setup<Vec3f>();
attr.Enable();
}
VertexArray::Unbind();
Vec3f lightPos(2.0f, 2.0f, 3.0f);
prog_norm.Use();
SetUniform(prog_norm, "LightPos", lightPos);
prog_refl.Use();
SetUniform(prog_refl, "LightPos", lightPos);
//
gl.ClearColor(0.2f, 0.2f, 0.2f, 0.0f);
gl.ClearDepth(1.0f);
gl.ClearStencil(0);
}
CubeExample(void)
: cube_instr(make_cube.Instructions())
, cube_indices(make_cube.Indices())
{
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"in vec4 Position;"
"in vec2 TexCoord;"
"out vec2 vertTexCoord;"
"void main(void)"
"{"
" vertTexCoord = TexCoord;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" Position;"
"}"
);
// compile it
vs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float i = ("
" 1 +"
" int(vertTexCoord.x*8) % 2+"
" int(vertTexCoord.y*8) % 2"
" ) % 2;"
" fragColor = vec4(i, i, 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();
// bind the VBO for the cube vertices
verts.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(prog, "Position");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
// bind the VBO for the cube texture-coordinates
texcoords.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.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(n_per_vertex, DataType::Float);
attr.Enable();
}
//
gl.ClearColor(0.8f, 0.8f, 0.7f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
LandscapeExample(void)
: grid_side(8)
, make_plane(
Vec3f(0.0f, 0.0f, 0.0f),
Vec3f(1.0f, 0.0f, 0.0f),
Vec3f(0.0f, 0.0f,-1.0f),
grid_side, grid_side
), plane_instr(make_plane.Instructions())
, plane_indices(make_plane.Indices())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, vc_int(prog, "vc_int")
, gc_int(prog, "gc_int")
, fc_int(prog, "fc_int")
{
VertexShader vs;
vs.Source(StrLit(
"#version 420\n"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"layout(binding = 0, offset = 0) uniform atomic_uint vc;"
"const float mult = 1.0/128.0;"
"uniform float vc_int;"
"in vec4 Position;"
"out vec3 vertColor;"
"void main(void)"
"{"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" Position;"
" vertColor = vec3("
" fract(atomicCounterIncrement(vc)*mult),"
" 0.0,"
" 0.0 "
" )*max(vc_int, 0.0);"
"}"
));
vs.Compile();
prog.AttachShader(vs);
GeometryShader gs;
gs.Source(StrLit(
"#version 420\n"
"layout (triangles) in;"
"layout (triangle_strip, max_vertices = 3) out;"
"layout(binding = 0, offset = 4) uniform atomic_uint gc;"
"const float mult = 1.0/128.0;"
"uniform float gc_int;"
"in vec3 vertColor[3];"
"out vec3 geomColor;"
"void main(void)"
"{"
" vec3 Color = vec3("
" 0.0,"
" fract(atomicCounterIncrement(gc)*mult),"
" 0.0 "
" )*max(gc_int, 0.0);"
" for(int v=0; v!=3; ++v)"
" {"
" gl_Position = gl_in[v].gl_Position;"
" geomColor = vertColor[v] + Color;"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
));
gs.Compile();
prog.AttachShader(gs);
FragmentShader fs;
fs.Source(StrLit(
"#version 420\n"
"layout(binding = 0, offset = 8) uniform atomic_uint fc;"
"const float mult = 1.0/4096.0;"
"uniform float fc_int;"
"in vec3 geomColor;"
"out vec3 fragColor;"
"void main(void)"
"{"
" vec3 Color = vec3("
" 0.0,"
" 0.0,"
" sqrt(fract(atomicCounterIncrement(fc)*mult))"
" )*max(fc_int, 0.0);"
" fragColor = geomColor + Color;"
"}"
));
fs.Compile();
prog.AttachShader(fs);
prog.Link();
prog.Use();
// bind the VAO for the plane
plane.Bind();
// bind the VBO for the plane vertices
positions.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();
}
counters.Bind(Buffer::Target::AtomicCounter);
{
const GLuint tmp[3] = {0u, 0u, 0u};
Buffer::Data(
Buffer::Target::AtomicCounter,
3, tmp,
BufferUsage::DynamicDraw
);
}
counters.BindBase(Buffer::IndexedTarget::AtomicCounter, 0);
gl.ClearColor(0.2f, 0.2f, 0.2f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
plane.Bind();
}
SphereExample(void)
: sphere_instr(make_sphere.Instructions())
, sphere_indices(make_sphere.Indices())
, hole_count(50)
, hole_diameter(0.30f)
{
// This shader will be used in transform fedback mode
// to transform the vertices used to "cut out the holes"
// the same way the sphere is transformed
vs_tfb.Source(
"#version 330\n"
"uniform mat4 CameraMatrix, ModelMatrix;"
"uniform float Diameter;"
"in vec3 Hole;"
"out vec3 vertTransfHole;"
"void main(void)"
"{"
" vertTransfHole = ("
" CameraMatrix *"
" ModelMatrix *"
" vec4(Hole * (1.0 + 0.5 * Diameter), 0.0)"
" ).xyz;"
"}"
);
// compile, setup transform feedback output variables
// link and use the program
vs_tfb.Compile();
prog_tfb.AttachShader(vs_tfb);
const GLchar* var_name = "vertTransfHole";
prog_tfb.TransformFeedbackVaryings(
1, &var_name,
TransformFeedbackMode::InterleavedAttribs
);
prog_tfb.Link();
prog_tfb.Use();
Uniform<GLfloat> diameter(prog_tfb, "Diameter");
diameter.Set(hole_diameter);
// bind the VAO for the holes
holes.Bind();
// bind the VBO for the hole vertices
hole_verts.Bind(Buffer::Target::Array);
// and the VBO for the transformed hole vertices captured by tfb
transf_hole_verts.Bind(Buffer::Target::TransformFeedback);
{
std::vector<GLfloat> data;
make_hole_data(data, hole_count);
Buffer::Data(Buffer::Target::TransformFeedback, data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(prog_tfb, "Hole");
attr.Setup<Vec3f>();
attr.Enable();
}
transf_hole_verts.BindBase(
Buffer::IndexedTarget::TransformFeedback,
0
);
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertNormal;"
"out vec3 vertLight;"
"const vec3 LightPos = vec3(2.0, 3.0, 3.0);"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertLight = LightPos-gl_Position.xyz;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
// compile it
vs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"in vec3 vertNormal;"
"in vec3 vertLight;"
"out vec4 fragColor;"
"const int HoleCount = 50;"
"uniform vec3 TransfHole[50];"
"uniform float Diameter;"
"void main(void)"
"{"
" int imax = 0;"
" float dmax = -1.0;"
" for(int i=0; i!=HoleCount; ++i)"
" {"
" float d = dot(vertNormal, TransfHole[i]);"
" if(dmax < d)"
" {"
" dmax = d;"
" imax = i;"
" }"
" }"
" float l = length(vertLight);"
" vec3 FragDiff = TransfHole[imax] - vertNormal;"
" vec3 FinalNormal = "
" length(FragDiff) > Diameter?"
" vertNormal:"
" normalize(FragDiff+vertNormal*Diameter);"
" float i = (l > 0.0) ? dot("
" FinalNormal, "
" normalize(vertLight)"
" ) / l : 0.0;"
" i = 0.2+max(i*2.5, 0.0);"
" fragColor = vec4(i, i, 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();
diameter.Set(hole_diameter);
// bind the VAO for the sphere
sphere.Bind();
// bind the VBO for the sphere vertices
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_sphere.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 sphere normals
normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_sphere.Normals(data);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
// setup the vertex attribs array for the vertices
VertexAttribArray attr(prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
gl.ClearColor(0.8f, 0.8f, 0.7f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
void Use(void)
{
_program.Use();
}
TessellationExample(void)
: shape_instr(make_shape.Instructions(PrimitiveType::Patches))
, shape_indices(make_shape.Indices())
, vs(ObjectDesc("Vertex"))
, cs(ObjectDesc("Tessellation Control"))
, es(ObjectDesc("Tessellation Evaluation"))
, gs(ObjectDesc("Geometry"))
, fs(ObjectDesc("Fragment"))
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
, offset(prog, "Offset")
, view_position(prog, "ViewPosition")
, viewport_dimensions(prog, "ViewportDimensions")
{
vs.Source(
"#version 330\n"
"uniform vec3 ViewPosition;"
"in vec3 Position;"
"out vec3 vertPosition;"
"out float vertDistance;"
"void main(void)"
"{"
" vertPosition = Position;"
" vertDistance = length(ViewPosition - vertPosition);"
"}"
);
vs.Compile();
cs.Source(
"#version 330\n"
"#extension ARB_tessellation_shader : enable\n"
"layout(vertices = 3) out;"
"in vec3 vertPosition[];"
"in float vertDistance[];"
"out vec3 tecoPosition[];"
"int tessLevel(float dist)"
"{"
" return int(9.0 / sqrt(dist+0.1));"
"}"
"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();
es.Source(
"#version 330\n"
"#extension ARB_tessellation_shader : enable\n"
"layout(triangles, equal_spacing, ccw) in;"
"const vec3 LightPosition = vec3(12.0, 10.0, 7.0);"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec3 tecoPosition[];"
"out vec3 teevNormal;"
"out vec3 teevLightDir;"
"void main(void)"
"{"
" vec3 p0 = gl_TessCoord.x * tecoPosition[0];"
" vec3 p1 = gl_TessCoord.y * tecoPosition[1];"
" vec3 p2 = gl_TessCoord.z * tecoPosition[2];"
" vec4 tempPosition = vec4(normalize(p0+p1+p2), 0.0);"
" teevNormal = (ModelMatrix * tempPosition).xyz;"
" tempPosition.w = 1.0;"
" tempPosition = ModelMatrix * tempPosition;"
" teevLightDir = LightPosition - tempPosition.xyz;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" tempPosition;"
"}"
);
es.Compile();
gs.Source(
"#version 330\n"
"layout (triangles) in;"
"layout (triangle_strip, max_vertices = 3) out;"
"uniform vec3 Offset;"
"uniform vec2 ViewportDimensions;"
"in vec3 teevNormal[], teevLightDir[];"
"noperspective out vec3 geomDist;"
"flat out vec3 geomNormal;"
"out vec3 geomColor;"
"out vec3 geomLightDir;"
"void main(void)"
"{"
" geomNormal = normalize("
" teevNormal[0]+"
" teevNormal[1]+"
" teevNormal[2]"
" );"
" vec2 ScreenPos[3];"
" for(int i=0; i!=3; ++i)"
" {"
" ScreenPos[i] = "
" ViewportDimensions*"
" gl_in[i].gl_Position.xy/"
" gl_in[i].gl_Position.w;"
" }"
" vec2 TmpVect[3];"
" for(int i=0; i!=3; ++i)"
" {"
" TmpVect[i] = "
" ScreenPos[(i+2)%3]-"
" ScreenPos[(i+1)%3];"
" }"
" const vec3 EdgeMask[3] = vec3[3]("
" vec3(1.0, 0.0, 0.0),"
" vec3(0.0, 1.0, 0.0),"
" vec3(0.0, 0.0, 1.0) "
" );"
" for(int i=0; i!=3; ++i)"
" {"
" float Dist = abs("
" TmpVect[(i+1)%3].x*TmpVect[(i+2)%3].y-"
" TmpVect[(i+1)%3].y*TmpVect[(i+2)%3].x "
" ) / length(TmpVect[i]);"
" vec3 DistVect = vec3(Dist, Dist, Dist);"
" gl_Position = gl_in[i].gl_Position;"
" geomColor = normalize(abs("
" vec3(2.0, 2.0, 2.0)-"
" teevNormal[i]-"
" Offset"
" ));"
" geomLightDir = teevLightDir[i];"
" geomDist = EdgeMask[i] * DistVect;"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
);
gs.Compile();
fs.Source(
"#version 330\n"
"noperspective in vec3 geomDist;"
"flat in vec3 geomNormal;"
"in vec3 geomColor;"
"in vec3 geomLightDir;"
"out vec3 fragColor;"
"void main(void)"
"{"
" float MinDist = min(min(geomDist.x,geomDist.y),geomDist.z);"
" float EdgeAlpha = exp2(-pow(MinDist, 2.0));"
" const float Ambient = 0.8;"
" float Diffuse = max(dot("
" normalize(geomNormal),"
" normalize(geomLightDir)"
" ), 0.0);"
" vec3 FaceColor = geomColor * (Diffuse + Ambient);"
" const vec3 EdgeColor = vec3(0.0, 0.0, 0.0);"
" fragColor = mix(FaceColor, EdgeColor, EdgeAlpha);"
"}"
);
fs.Compile();
prog.AttachShader(vs);
prog.AttachShader(cs);
prog.AttachShader(es);
prog.AttachShader(gs);
prog.AttachShader(fs);
prog.Link();
prog.Use();
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();
indices.Bind(Buffer::Target::ElementArray);
Buffer::Data(Buffer::Target::ElementArray, shape_indices);
shape_indices.clear();
}
//
gl.ClearColor(0.8f, 0.8f, 0.8f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
prog.Use();
}
HaloExample(void)
: make_shape()
, shape_indices(make_shape.Indices())
, shape_instr(make_shape.Instructions())
, vs_shape(ObjectDesc("Shape VS"))
, vs_plane(ObjectDesc("Plane VS"))
, fs_shape(ObjectDesc("Shape FS"))
, fs_plane(ObjectDesc("Plane FS"))
, vs_halo(ObjectDesc("Halo VS"))
, gs_halo(ObjectDesc("Halo GS"))
, fs_halo(ObjectDesc("Halo FS"))
, shape_projection_matrix(shape_prog, "ProjectionMatrix")
, shape_camera_matrix(shape_prog, "CameraMatrix")
, shape_model_matrix(shape_prog, "ModelMatrix")
, plane_projection_matrix(plane_prog, "ProjectionMatrix")
, plane_camera_matrix(plane_prog, "CameraMatrix")
, halo_projection_matrix(halo_prog, "ProjectionMatrix")
, halo_camera_matrix(halo_prog, "CameraMatrix")
, halo_model_matrix(halo_prog, "ModelMatrix")
{
vs_shape.Source(
"#version 140\n"
"in vec4 Position;"
"in vec3 Normal;"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"uniform vec3 LightPos;"
"out vec3 vertNormal;"
"out vec3 vertViewNormal;"
"out vec3 vertLight;"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertViewNormal = mat3(CameraMatrix)*vertNormal;"
" vertLight = LightPos - gl_Position.xyz;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
vs_shape.Compile();
fs_shape.Source(
"#version 140\n"
"in vec3 vertNormal;"
"in vec3 vertViewNormal;"
"in vec3 vertLight;"
"uniform mat4 CameraMatrix;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float ltlen = sqrt(length(vertLight));"
" float ltexp = dot("
" normalize(vertNormal),"
" normalize(vertLight)"
" );"
" float lview = dot("
" normalize(vertLight),"
" normalize(vec3("
" CameraMatrix[0][2],"
" CameraMatrix[1][2],"
" CameraMatrix[2][2] "
" ))"
" );"
" float depth = normalize(vertViewNormal).z;"
" vec3 ftrefl = vec3(0.9, 0.8, 0.7);"
" vec3 scatter = vec3(0.9, 0.6, 0.1);"
" vec3 bklt = vec3(0.8, 0.6, 0.4);"
" vec3 ambient = vec3(0.5, 0.4, 0.3);"
" fragColor = vec4("
" pow(max(ltexp, 0.0), 8.0)*ftrefl+"
" ( ltexp+1.0)/ltlen*pow(depth,2.0)*scatter+"
" (-ltexp+1.0)/ltlen*(1.0-depth)*scatter+"
" (-lview+1.0)*0.6*(1.0-abs(depth))*bklt+"
" 0.2*ambient,"
" 1.0"
" );"
"}"
);
fs_shape.Compile();
shape_prog.AttachShader(vs_shape);
shape_prog.AttachShader(fs_shape);
shape_prog.Link();
vs_plane.Source(
"#version 140\n"
"in vec4 Position;"
"in vec3 Normal;"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"uniform vec3 LightPos;"
"out vec3 vertNormal;"
"out vec3 vertLight;"
"void main(void)"
"{"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" Position;"
" vertNormal = Normal;"
" vertLight = LightPos-Position.xyz;"
"}"
);
vs_plane.Compile();
fs_plane.Source(
"#version 140\n"
"in vec3 vertNormal;"
"in vec3 vertLight;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = sqrt(length(vertLight));"
" float e = dot("
" vertNormal,"
" normalize(vertLight)"
" );"
" float d = l > 0.0 ? e / l : 0.0;"
" float i = 0.2 + 2.5 * d;"
" fragColor = vec4(0.8*i, 0.7*i, 0.4*i, 1.0);"
"}"
);
fs_plane.Compile();
plane_prog.AttachShader(vs_plane);
plane_prog.AttachShader(fs_plane);
plane_prog.Link();
vs_halo.Source(
"#version 150\n"
"in vec4 Position;"
"in vec3 Normal;"
"uniform mat4 ModelMatrix, CameraMatrix;"
"out vec3 vertNormal;"
"out float vd;"
"void main(void)"
"{"
" gl_Position = "
" CameraMatrix *"
" ModelMatrix *"
" Position;"
" vertNormal = ("
" CameraMatrix *"
" ModelMatrix *"
" vec4(Normal, 0.0)"
" ).xyz;"
" vd = vertNormal.z;"
"}"
);
vs_halo.Compile();
gs_halo.Source(
"#version 150\n"
"layout(triangles) in;"
"layout(triangle_strip, max_vertices = 12) out;"
"in vec3 vertNormal[];"
"in float vd[];"
"uniform mat4 CameraMatrix, ProjectionMatrix;"
"uniform vec3 LightPos;"
"out float geomAlpha;"
"void main(void)"
"{"
" for(int v=0; v!=3; ++v)"
" {"
" int a = v, b = (v+1)%3, c = (v+2)%3;"
" vec4 pa = gl_in[a].gl_Position;"
" vec4 pb = gl_in[b].gl_Position;"
" vec4 pc = gl_in[c].gl_Position;"
" vec4 px, py;"
" vec3 na = vertNormal[a];"
" vec3 nb = vertNormal[b];"
" vec3 nc = vertNormal[c];"
" vec3 nx, ny;"
" if(vd[a] == 0.0 && vd[b] == 0.0)"
" {"
" px = pa;"
" nx = na;"
" py = pb;"
" ny = nb;"
" }"
" else if(vd[a] > 0.0 && vd[b] < 0.0)"
" {"
" float x = vd[a]/(vd[a]-vd[b]);"
" float y;"
" px = mix(pa, pb, x);"
" nx = mix(na, nb, x);"
" if(vd[c] < 0.0)"
" {"
" y = vd[a]/(vd[a]-vd[c]);"
" py = mix(pa, pc, y);"
" ny = mix(na, nc, y);"
" }"
" else"
" {"
" y = vd[c]/(vd[c]-vd[b]);"
" py = mix(pc, pb, y);"
" ny = mix(nc, nb, y);"
" }"
" }"
" else continue;"
" vec4 gx1 = vec4(px.xyz, 1.0);"
" vec4 gy1 = vec4(py.xyz, 1.0);"
" vec4 gx2 = vec4(px.xyz + nx*0.3, 1.0);"
" vec4 gy2 = vec4(py.xyz + ny*0.3, 1.0);"
" gl_Position = ProjectionMatrix * gy1;"
" geomAlpha = 1.0;"
" EmitVertex();"
" gl_Position = ProjectionMatrix * gx1;"
" geomAlpha = 1.0;"
" EmitVertex();"
" gl_Position = ProjectionMatrix * gy2;"
" geomAlpha = 0.0;"
" EmitVertex();"
" gl_Position = ProjectionMatrix * gx2;"
" geomAlpha = 0.0;"
" EmitVertex();"
" EndPrimitive();"
" break;"
" }"
"}"
);
gs_halo.Compile();
fs_halo.Source(
"#version 150\n"
"in float geomAlpha;"
"out vec4 fragColor;"
"void main(void)"
"{"
" fragColor = vec4("
" 0.5, 0.4, 0.3,"
" pow(geomAlpha, 2.0)"
" );"
"}"
);
fs_halo.Compile();
halo_prog.AttachShader(vs_halo);
halo_prog.AttachShader(gs_halo);
halo_prog.AttachShader(fs_halo);
halo_prog.Link();
// bind the VAO for the shape
shape.Bind();
// bind the VBO for the shape vertices
shape_verts.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(VertexArrayAttrib::QueryCommonLocation(
MakeGroup(shape_prog, halo_prog),
"Position",
location
))
{
VertexArrayAttrib attr(location);
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
else OGLPLUS_ABORT("Inconsistent 'Position' location");
}
// bind the VBO for the shape normals
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();
VertexArrayAttrib attr(shape_prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// bind the VAO for the plane
plane.Bind();
// bind the VBO for the plane vertices
plane_verts.Bind(Buffer::Target::Array);
{
GLfloat data[4*3] = {
-9.0f, 0.0f, 9.0f,
-9.0f, 0.0f, -9.0f,
9.0f, 0.0f, 9.0f,
9.0f, 0.0f, -9.0f
};
Buffer::Data(Buffer::Target::Array, 4*3, data);
plane_prog.Use();
VertexArrayAttrib attr(plane_prog, "Position");
attr.Setup<Vec3f>();
attr.Enable();
}
// bind the VBO for the plane normals
plane_normals.Bind(Buffer::Target::Array);
{
GLfloat data[4*3] = {
-0.1f, 1.0f, 0.1f,
-0.1f, 1.0f, -0.1f,
0.1f, 1.0f, 0.1f,
0.1f, 1.0f, -0.1f
};
Buffer::Data(Buffer::Target::Array, 4*3, data);
plane_prog.Use();
VertexArrayAttrib attr(plane_prog, "Normal");
attr.Setup<Vec3f>();
attr.Enable();
}
Vec3f lightPos(2.0f, 2.5f, 9.0f);
ProgramUniform<Vec3f>(shape_prog, "LightPos").Set(lightPos);
ProgramUniform<Vec3f>(plane_prog, "LightPos").Set(lightPos);
gl.ClearColor(0.2f, 0.2f, 0.2f, 0.0f);
gl.ClearDepth(1.0f);
gl.ClearStencil(0);
gl.Enable(Capability::DepthTest);
gl.BlendFunc(BlendFn::SrcAlpha, BlendFn::One);
}
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);
}
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());
}
CubeExample(void)
: cube_instr(make_cube.Instructions())
, cube_indices(make_cube.Indices())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
, front_facing(prog, "FrontFacing")
, inst_count(32)
{
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"uniform vec3 LightPos;"
"uniform int InstCount;"
"uniform int FrontFacing;"
"in vec4 Position;"
"in vec3 Normal;"
"out float vertMult;"
"out vec3 vertColor;"
"out vec3 vertWrapNormal;"
"out vec3 vertNormal;"
"out vec3 vertLight;"
"void main(void)"
"{"
" int inst = (FrontFacing != 0) ? "
" (InstCount - gl_InstanceID - 1):"
" gl_InstanceID;"
" vertMult = float(inst) / float(InstCount-1);"
" float sca = 1.0 - 0.3 * pow(vertMult, 2);"
" mat4 ScaleMatrix = mat4("
" sca, 0.0, 0.0, 0.0,"
" 0.0, sca, 0.0, 0.0,"
" 0.0, 0.0, sca, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" );"
" gl_Position = ModelMatrix * Position;"
" vertColor = Normal;"
" vec3 wrap = Position.xyz - Normal;"
" vertWrapNormal = "
" mat3(ModelMatrix)*"
" normalize(mix("
" Normal,"
" wrap,"
" mix(0.5, 1.0, vertMult)"
" ));"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertLight = LightPos-gl_Position.xyz;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" ScaleMatrix *"
" gl_Position;"
"}"
);
// compile it
vs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"in float vertMult;"
"in vec3 vertColor;"
"in vec3 vertWrapNormal;"
"in vec3 vertNormal;"
"in vec3 vertLight;"
"out vec4 fragColor;"
"uniform int InstCount;"
"void main(void)"
"{"
" float l = dot(vertLight, vertLight);"
" float d = l > 0.0 ? dot("
" vertNormal, "
" normalize(vertLight)"
" ) / l : 0.0;"
" float s = max("
" dot(vertWrapNormal, vertLight)/l,"
" 0.0"
" );"
" float intensity = clamp("
" 0.2 + d * 3.0 + s * 5.5,"
" 0.0,"
" 1.0"
" );"
" fragColor = vec4("
" abs(vertColor) * intensity,"
" (2.5 + 1.5*d + 1.5*s) / InstCount"
" );"
"}"
);
// 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();
// bind the VBO for the cube vertices
verts.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
VertexArrayAttrib attr(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);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// the light position
Uniform<Vec3f>(prog, "LightPos").Set(Vec3f(-3.0f, -2.0f, -3.0f));
// and the instance count
Uniform<GLint>(prog, "InstCount").Set(inst_count);
//
gl.ClearColor(0.5f, 0.6f, 0.5f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_cube.FaceWinding());
gl.Enable(Capability::Blend);
gl.BlendFunc(BlendFn::SrcAlpha, BlendFn::OneMinusSrcAlpha);
}
static Program make_prog(void)
{
Program prog;
VertexShader vs;
vs.Source(StrCRef(
"#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(StrCRef(
"#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(StrCRef(
"#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();
return prog;
}