mirror of https://github.com/AxioDL/zeus.git
130 lines
4.1 KiB
C++
130 lines
4.1 KiB
C++
#ifndef CFRUSTUM_HPP
|
|
#define CFRUSTUM_HPP
|
|
|
|
#include "CPlane.hpp"
|
|
#include "CAABox.hpp"
|
|
|
|
namespace Zeus
|
|
{
|
|
class CFrustum
|
|
{
|
|
CPlane m_planes[6];
|
|
public:
|
|
|
|
inline void updatePlanes(const CTransform& modelview, const CProjection& projection)
|
|
{
|
|
CMatrix4f mv;
|
|
modelview.toMatrix4f(mv);
|
|
CMatrix4f mvp = projection.getCachedMatrix() * mv;
|
|
CMatrix4f mvp_rm = mvp.transposed();
|
|
|
|
#if __SSE__
|
|
|
|
/* Left */
|
|
m_planes[0].mVec128 = _mm_add_ps(mvp_rm.vec[0].mVec128, mvp_rm.vec[3].mVec128);
|
|
|
|
/* Right */
|
|
m_planes[1].mVec128 = _mm_add_ps(_mm_sub_ps(CVector3f::skZero.mVec128, mvp_rm.vec[0].mVec128), mvp_rm.vec[3].mVec128);
|
|
|
|
/* Bottom */
|
|
m_planes[2].mVec128 = _mm_add_ps(mvp_rm.vec[1].mVec128, mvp_rm.vec[3].mVec128);
|
|
|
|
/* Top */
|
|
m_planes[3].mVec128 = _mm_add_ps(_mm_sub_ps(CVector3f::skZero.mVec128, mvp_rm.vec[1].mVec128), mvp_rm.vec[3].mVec128);
|
|
|
|
/* Near */
|
|
m_planes[4].mVec128 = _mm_add_ps(mvp_rm.vec[2].mVec128, mvp_rm.vec[3].mVec128);
|
|
|
|
/* Far */
|
|
m_planes[5].mVec128 = _mm_add_ps(_mm_sub_ps(CVector3f::skZero.mVec128, mvp_rm.vec[2].mVec128), mvp_rm.vec[3].mVec128);
|
|
|
|
#else
|
|
/* Left */
|
|
m_planes[0].a = mvp_rm.m[0][0] + mvp_rm.m[3][0];
|
|
m_planes[0].b = mvp_rm.m[0][1] + mvp_rm.m[3][1];
|
|
m_planes[0].c = mvp_rm.m[0][2] + mvp_rm.m[3][2];
|
|
m_planes[0].d = mvp_rm.m[0][3] + mvp_rm.m[3][3];
|
|
|
|
/* Right */
|
|
m_planes[1].a = -mvp_rm.m[0][0] + mvp_rm.m[3][0];
|
|
m_planes[1].b = -mvp_rm.m[0][1] + mvp_rm.m[3][1];
|
|
m_planes[1].c = -mvp_rm.m[0][2] + mvp_rm.m[3][2];
|
|
m_planes[1].d = -mvp_rm.m[0][3] + mvp_rm.m[3][3];
|
|
|
|
/* Bottom */
|
|
m_planes[2].a = mvp_rm.m[1][0] + mvp_rm.m[3][0];
|
|
m_planes[2].b = mvp_rm.m[1][1] + mvp_rm.m[3][1];
|
|
m_planes[2].c = mvp_rm.m[1][2] + mvp_rm.m[3][2];
|
|
m_planes[2].d = mvp_rm.m[1][3] + mvp_rm.m[3][3];
|
|
|
|
/* Top */
|
|
m_planes[3].a = -mvp_rm.m[1][0] + mvp_rm.m[3][0];
|
|
m_planes[3].b = -mvp_rm.m[1][1] + mvp_rm.m[3][1];
|
|
m_planes[3].c = -mvp_rm.m[1][2] + mvp_rm.m[3][2];
|
|
m_planes[3].d = -mvp_rm.m[1][3] + mvp_rm.m[3][3];
|
|
|
|
/* Near */
|
|
m_planes[4].a = mvp_rm.m[2][0] + mvp_rm.m[3][0];
|
|
m_planes[4].b = mvp_rm.m[2][1] + mvp_rm.m[3][1];
|
|
m_planes[4].c = mvp_rm.m[2][2] + mvp_rm.m[3][2];
|
|
m_planes[4].d = mvp_rm.m[2][3] + mvp_rm.m[3][3];
|
|
|
|
/* Far */
|
|
m_planes[5].a = -mvp_rm.m[2][0] + mvp_rm.m[3][0];
|
|
m_planes[5].b = -mvp_rm.m[2][1] + mvp_rm.m[3][1];
|
|
m_planes[5].c = -mvp_rm.m[2][2] + mvp_rm.m[3][2];
|
|
m_planes[5].d = -mvp_rm.m[2][3] + mvp_rm.m[3][3];
|
|
|
|
#endif
|
|
|
|
m_planes[0].normalize();
|
|
m_planes[1].normalize();
|
|
m_planes[2].normalize();
|
|
m_planes[3].normalize();
|
|
m_planes[4].normalize();
|
|
m_planes[5].normalize();
|
|
|
|
}
|
|
|
|
inline bool aabbFrustumTest(const CAABox& aabb) const
|
|
{
|
|
CVector3f vmin, vmax;
|
|
int i;
|
|
for (i=0 ; i<6 ; ++i) {
|
|
const CPlane& plane = m_planes[i];
|
|
|
|
/* X axis */
|
|
if (plane.a >= 0) {
|
|
vmin[0] = aabb.m_min[0];
|
|
vmax[0] = aabb.m_max[0];
|
|
} else {
|
|
vmin[0] = aabb.m_max[0];
|
|
vmax[0] = aabb.m_min[0];
|
|
}
|
|
/* Y axis */
|
|
if (plane.b >= 0) {
|
|
vmin[1] = aabb.m_min[1];
|
|
vmax[1] = aabb.m_max[1];
|
|
} else {
|
|
vmin[1] = aabb.m_max[1];
|
|
vmax[1] = aabb.m_min[1];
|
|
}
|
|
/* Z axis */
|
|
if (plane.c >= 0) {
|
|
vmin[2] = aabb.m_min[2];
|
|
vmax[2] = aabb.m_max[2];
|
|
} else {
|
|
vmin[2] = aabb.m_max[2];
|
|
vmax[2] = aabb.m_min[2];
|
|
}
|
|
float dadot = plane.vec.dot(vmax);
|
|
if (dadot + plane.d < 0)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
};
|
|
}
|
|
#endif // CFRUSTUM_HPP
|