void BSP(const Mat4f& camera, std::size_t p)
{
assert(p < std::size_t(plane.size()));
// the normal vector of the plane
Vec4f normal(make_plane[p].Normal(), 0.0);
// check if we are seeing the front or the back face
GLfloat sign = ((camera*normal).z() >= 0.0f)? 1.0f: -1.0f;
bool at_leaf = p+1 == plane.size();
gl.Enable(Functionality::ClipDistance, p);
torus_clip_signs[p].Set(-sign);
plane_clip_signs[p].Set(-sign);
if(at_leaf) RenderTorus();
else BSP(camera, p+1);
gl.Disable(Functionality::ClipDistance, p);
RenderPlane(p);
gl.Enable(Functionality::ClipDistance, p);
torus_clip_signs[p].Set(+sign);
plane_clip_signs[p].Set(+sign);
if(at_leaf) RenderTorus();
else BSP(camera, p+1);
gl.Disable(Functionality::ClipDistance, p);
}
/*******************************************************************************
* 函数名称: main
* 输入参数:
* 输出参数:
* --返回值:
* 函数功能: --
*******************************************************************************/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f10x_xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f10x.c file
*/
BSP();
loop();
return 0u;
}
void Render(double time)
{
gl.Clear().ColorBuffer().DepthBuffer();
auto camera = CamMatrixf::Orbiting(
Vec3f(),
6.0,
FullCircles(time / 10.0),
Degrees(45.0 + SineWave(time / 7.0)*30.0)
);
auto model = ModelMatrixf::RotationX(FullCircles(time / 12.0));
plane_camera_matrix.Set(camera);
torus_camera_matrix.Set(camera);
torus_model_matrix.Set(model);
BSP(camera, 0);
}
