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
);
}
}
void Render(double time)
{
//
// the camera matrix
Mat4f camera = CamMatrixf::Orbiting(
Vec3f(),
6.5 + SineWave(time / 16.0) * 1.5,
FullCircles(time / 12.0),
Degrees(SineWave(time / 30.0) * 90)
);
//
// the model matrix
Mat4f model = ModelMatrixf::RotationA(
Vec3f(1.0f, 1.0f, 1.0f),
FullCircles(time / 10.0)
);
// the light position
Vec3f lightPos(0.0f, SineWave(time / 7.0) * 0.5, 0.0f);
//
SetProgramUniform(shape_prog, "LightPos", lightPos);
SetProgramUniform(depth_prog, "LightPos", lightPos);
SetProgramUniform(light_prog, "LightPos", lightPos);
//
SetProgramUniform(shape_prog, "CameraMatrix", camera);
SetProgramUniform(light_prog, "CameraMatrix", camera);
SetProgramUniform(shape_prog, "ModelMatrix", model);
SetProgramUniform(depth_prog, "ModelMatrix", model);
// render the shadow map
depth_fbo.Bind(Framebuffer::Target::Draw);
gl.DrawBuffer(ColorBuffer::None);
gl.Viewport(tex_side, tex_side);
gl.Clear().DepthBuffer();
depth_prog.Use();
shape.Bind();
shape_instr.Draw(shape_indices);
// render the output frame
Framebuffer::BindDefault(Framebuffer::Target::Draw);
gl.DrawBuffer(ColorBuffer::Back);
gl.Viewport(width, height);
gl.Clear().ColorBuffer().DepthBuffer();
shape_prog.Use();
shape.Bind();
shape_instr.Draw(shape_indices);
gl.Enable(Capability::Blend);
light_prog.Use();
SetUniform(light_prog, "ViewX", camera.Row(0).xyz());
SetUniform(light_prog, "ViewY", camera.Row(1).xyz());
SetUniform(light_prog, "ViewZ", camera.Row(2).xyz());
light.Bind();
gl.DrawArraysInstanced(
PrimitiveType::Points,
0, 1,
sample_count
);
gl.Disable(Capability::Blend);
}