void Render(double time)
{
const GLfloat clear_color[4] = {0.8f, 0.8f, 0.7f, 0.0f};
gl.ClearColorBuffer(0, clear_color);
gl.ClearDepthBuffer(1.0f);
//
// set the matrix for camera orbiting the origin
camera_matrix.Set(
CamMatrixf::Orbiting(
Vec3f(),
3.5,
Degrees(time * 15),
Degrees(SineWave(time / 6.3) * 45)
)
);
model_matrix.Set(
ModelMatrixf::Translation(-1.0, 0.0, 0.0) *
ModelMatrixf::RotationZ(Degrees(time * 180))
);
cube_instr.Draw(cube_indices);
model_matrix.Set(
ModelMatrixf::Translation(+1.0, 0.0, 0.0) *
ModelMatrixf::RotationY(Degrees(time * 90))
);
cube_instr.Draw(cube_indices);
}
void RenderGlassShadowMap(
const Vec3f& light_position,
const Vec3f& torus_center,
const Mat4f& torus_matrix,
const Mat4f& light_proj_matrix
)
{
glass_shadow_fbo.Bind(Framebuffer::Target::Draw);
gl.Viewport(shadow_tex_side, shadow_tex_side);
const GLfloat clear_color[4] = {1.0f, 1.0f, 1.0f, 0.0f};
gl.ClearColorBuffer(0, clear_color);
transf_prog.camera_matrix.Set(light_proj_matrix);
transf_prog.camera_position.Set(light_position);
transf_prog.light_proj_matrix.Set(light_proj_matrix);
transf_prog.light_position.Set(light_position);
// Render the torus' frame
transf_prog.model_matrix.Set(torus_matrix);
// setup the view clipping plane
Planef clip_plane = Planef::FromPointAndNormal(
torus_center,
Normalized(light_position-torus_center)
);
transf_prog.clip_plane.Set(clip_plane.Equation());
light_pp.Bind();
light_prog.color = Vec3f(0.6f, 0.4f, 0.1f);
gl.Disable(Capability::DepthTest);
gl.Enable(Functionality::ClipDistance, 0);
gl.Enable(Capability::Blend);
for(int c=0; c!=2; ++c)
{
transf_prog.clip_direction.Set((c == 0)?1:-1);
for(int p=3; p>=0; --p)
{
if(p % 2 == 0) gl.CullFace(Face::Front);
else gl.CullFace(Face::Back);
torus.Draw(
[&p](GLuint phase) -> bool
{
if(p == 0 || p == 3)
{
return (phase == 4);
}
else return (phase > 4);
}
);
}
}
gl.Disable(Capability::Blend);
gl.Disable(Functionality::ClipDistance, 0);
gl.Enable(Capability::DepthTest);
}