//! \brief Set view frustum from matrix information
//! \param viewProjection view * projection matrix
void Frustum::Set(const Matrix4 & viewProjection)
{
planeArray.resize(6);
#define SETUP_PLANE(plane, x1, x2, x3, x4) \
planeArray[plane].n.x = -(x1); planeArray[plane].n.y = -(x2); \
planeArray[plane].n.z = -(x3); planeArray[plane].d = -(x4); \
planeArray[plane].Normalize();
// left
SETUP_PLANE(EFP_LEFT,
viewProjection._03 + viewProjection._00,
viewProjection._13 + viewProjection._10,
viewProjection._23 + viewProjection._20,
viewProjection._33 + viewProjection._30);
// right
SETUP_PLANE(EFP_RIGHT,
viewProjection._03 - viewProjection._00,
viewProjection._13 - viewProjection._10,
viewProjection._23 - viewProjection._20,
viewProjection._33 - viewProjection._30);
// bottom
SETUP_PLANE(EFP_BOTTOM,
viewProjection._03 + viewProjection._01,
viewProjection._13 + viewProjection._11,
viewProjection._23 + viewProjection._21,
viewProjection._33 + viewProjection._31);
// top
SETUP_PLANE(EFP_TOP,
viewProjection._03 - viewProjection._01,
viewProjection._13 - viewProjection._11,
viewProjection._23 - viewProjection._21,
viewProjection._33 - viewProjection._31);
// DirectX version
// near
SETUP_PLANE(EFP_NEAR,
viewProjection._02,
viewProjection._12,
viewProjection._22,
viewProjection._32);
// SETUP_PLANE(EFP_NEAR,
// viewProjection._03 + viewProjection._02,
// viewProjection._13 + viewProjection._12,
// viewProjection._23 + viewProjection._22,
// viewProjection._33 + viewProjection._32);
// far
SETUP_PLANE(EFP_FAR,
viewProjection._03 - viewProjection._02,
viewProjection._13 - viewProjection._12,
viewProjection._23 - viewProjection._22,
viewProjection._33 - viewProjection._32);
planeCount = 6;
#undef SETUP_PLANE
}
//! \brief Set view frustum from matrix information
//! \param viewProjection view * projection matrix
void Frustum::Build(const Matrix4 & viewProjection)
{
planeArray.resize(6);
#define SETUP_PLANE(plane, x1, x2, x3, x4) \
planeArray[plane].n.x = -(x1); planeArray[plane].n.y = -(x2); \
planeArray[plane].n.z = -(x3); planeArray[plane].d = -(x4); \
planeArray[plane].Normalize();
// left
SETUP_PLANE(EFP_LEFT,
viewProjection._03 + viewProjection._00,
viewProjection._13 + viewProjection._10,
viewProjection._23 + viewProjection._20,
viewProjection._33 + viewProjection._30);
// right
SETUP_PLANE(EFP_RIGHT,
viewProjection._03 - viewProjection._00,
viewProjection._13 - viewProjection._10,
viewProjection._23 - viewProjection._20,
viewProjection._33 - viewProjection._30);
// bottom
SETUP_PLANE(EFP_BOTTOM,
viewProjection._03 + viewProjection._01,
viewProjection._13 + viewProjection._11,
viewProjection._23 + viewProjection._21,
viewProjection._33 + viewProjection._31);
// top
SETUP_PLANE(EFP_TOP,
viewProjection._03 - viewProjection._01,
viewProjection._13 - viewProjection._11,
viewProjection._23 - viewProjection._21,
viewProjection._33 - viewProjection._31);
// DirectX version
#ifdef __DAVAENGINE_DIRECTX9__
SETUP_PLANE(EFP_NEAR,
viewProjection._02,
viewProjection._12,
viewProjection._22,
viewProjection._32);
#else //opengl
SETUP_PLANE(EFP_NEAR,
viewProjection._03 + viewProjection._02,
viewProjection._13 + viewProjection._12,
viewProjection._23 + viewProjection._22,
viewProjection._33 + viewProjection._32);
#endif //__DAVAENGINE_DIRECTX9__
// far
SETUP_PLANE(EFP_FAR,
viewProjection._03 - viewProjection._02,
viewProjection._13 - viewProjection._12,
viewProjection._23 - viewProjection._22,
viewProjection._33 - viewProjection._32);
planeCount = 6;
#undef SETUP_PLANE
}
