void Render(double time)
{
static const Mat4f reflection(
Vec4f( 1.0, 0.0, 0.0, 0.0),
Vec4f( 0.0,-1.0, 0.0, 0.0),
Vec4f( 0.0, 0.0, 1.0, 0.0),
Vec4f( 0.0, 0.0, 0.0, 1.0)
);
auto camera = CamMatrixf::Orbiting(
Vec3f(),
GLfloat(7.0 + SineWave(time / 12.0)*2.5),
FullCircles(time / 10.0),
Degrees(45.0 - SineWave(time / 7.0)*35.0)
);
shape_prog.Use();
shape.Bind();
gl.Enable(Capability::CullFace);
gl.FrontFace(make_shape.FaceWinding());
// render into the off-screen framebuffer
fbo.Bind(Framebuffer::Target::Draw);
gl.Viewport(
(width - refl_tex_side) / 2,
(height - refl_tex_side) / 2,
refl_tex_side, refl_tex_side
);
gl.Clear().ColorBuffer().DepthBuffer();
shape_camera_matrix.Set(
camera *
ModelMatrixf::Translation(0.0f, -1.0f, 0.0f) *
reflection
);
gl.CullFace(Face::Front);
shape_instr.Draw(shape_indices);
gl.Bind(Framebuffer::Target::Draw, DefaultFramebuffer());
gl.Viewport(width, height);
gl.Clear().ColorBuffer().DepthBuffer();
shape_camera_matrix.Set(camera);
gl.CullFace(Face::Back);
shape_instr.Draw(shape_indices);
gl.Disable(Capability::CullFace);
// Render the plane
plane_prog.Use();
plane.Bind();
plane_camera_matrix.Set(camera);
plane_camera_position.Set(camera.Position());
plane_instr.Draw(plane_indices);
}
void Use(void)
{
vao.Bind();
}
