void Frustum::RecalculatePlanesEx(glm::mat4x4& p_view, glm::mat4x4& p_proj)
{
glm::mat4 matrix;
float a = -(m_far + m_near) / (m_far - m_near);
float b = -(2 * m_far * m_near) / (m_far - m_near);
float c = p_proj[2][2];
float d = p_proj[3][2];
matrix = p_proj * p_view;
m_planesEx[NEARP].a = matrix[0][3] + matrix[0][2];
m_planesEx[NEARP].b = matrix[1][3] + matrix[1][2];
m_planesEx[NEARP].c = matrix[2][3] + matrix[2][2];
m_planesEx[NEARP].d = matrix[3][3] + matrix[3][2];
NormalizePlane(m_planesEx[NEARP]);
m_planesEx[FARP].a = matrix[0][3] - matrix[0][2];
m_planesEx[FARP].b = matrix[1][3] - matrix[1][2];
m_planesEx[FARP].c = matrix[2][3] - matrix[2][2];
m_planesEx[FARP].d = matrix[3][3] - matrix[3][2];
NormalizePlane(m_planesEx[FARP]);
m_planesEx[LEFT].a = matrix[0][3] + matrix[0][0];
m_planesEx[LEFT].b = matrix[1][3] + matrix[1][0];
m_planesEx[LEFT].c = matrix[2][3] + matrix[2][0];
m_planesEx[LEFT].d = matrix[3][3] + matrix[3][0];
NormalizePlane(m_planesEx[LEFT]);
m_planesEx[RIGHT].a = matrix[0][3] - matrix[0][0];
m_planesEx[RIGHT].b = matrix[1][3] - matrix[1][0];
m_planesEx[RIGHT].c = matrix[2][3] - matrix[2][0];
m_planesEx[RIGHT].d = matrix[3][3] - matrix[3][0];
NormalizePlane(m_planesEx[RIGHT]);
m_planesEx[TOP].a = matrix[0][3] - matrix[0][1];
m_planesEx[TOP].b = matrix[1][3] - matrix[1][1];
m_planesEx[TOP].c = matrix[2][3] - matrix[2][1];
m_planesEx[TOP].d = matrix[3][3] - matrix[3][1];
NormalizePlane(m_planesEx[TOP]);
m_planesEx[BOTTOM].a = matrix[0][3] + matrix[0][1];
m_planesEx[BOTTOM].b = matrix[1][3] + matrix[1][1];
m_planesEx[BOTTOM].c = matrix[2][3] + matrix[2][1];
m_planesEx[BOTTOM].d = matrix[3][3] + matrix[3][1];
NormalizePlane(m_planesEx[BOTTOM]);
ftl = Intersect3Planes(m_planesEx[LEFT], m_planesEx[TOP], m_planesEx[FARP]);
fbl = Intersect3Planes(m_planesEx[LEFT], m_planesEx[BOTTOM], m_planesEx[FARP]);
fbr = Intersect3Planes(m_planesEx[RIGHT], m_planesEx[BOTTOM], m_planesEx[FARP]);
ftr = Intersect3Planes(m_planesEx[RIGHT], m_planesEx[TOP], m_planesEx[FARP]);
ntl = Intersect3Planes(m_planesEx[LEFT], m_planesEx[TOP], m_planesEx[NEARP]);
nbl = Intersect3Planes(m_planesEx[LEFT], m_planesEx[BOTTOM], m_planesEx[NEARP]);
nbr = Intersect3Planes(m_planesEx[RIGHT], m_planesEx[BOTTOM], m_planesEx[NEARP]);
ntr = Intersect3Planes(m_planesEx[RIGHT], m_planesEx[TOP], m_planesEx[NEARP]);
}
void FrustumPlanes::GetPoints(VEC3* points) const
{
assert(points);
Intersect3Planes(Planes[4], Planes[0], Planes[3], &points[0]);
Intersect3Planes(Planes[4], Planes[1], Planes[3], &points[1]);
Intersect3Planes(Planes[4], Planes[0], Planes[2], &points[2]);
Intersect3Planes(Planes[4], Planes[1], Planes[2], &points[3]);
Intersect3Planes(Planes[5], Planes[0], Planes[3], &points[4]);
Intersect3Planes(Planes[5], Planes[1], Planes[3], &points[5]);
Intersect3Planes(Planes[5], Planes[0], Planes[2], &points[6]);
Intersect3Planes(Planes[5], Planes[1], Planes[2], &points[7]);
}
