FrustumG.h

/* ------------------------------------------------------

   View Frustum - Std3D

--------------------------------------------------------*/

#ifndef _FRUSTUM_
#define _FRUSTUM_

#include "Vec3.h"
#include "Matrix.hpp"
#include "Plane.h"
#include "AABox.h"


class FrustumG
{
public:

   enum EClipPlane
   {
      P_TOP = 0,
      P_BOTTOM,
      P_LEFT,
      P_RIGHT,
      P_NEAR,
      P_FAR,
      P_AMOUNT
   };

   enum 
   { 
      OUTSIDE,  
      INSIDE, 
      INTERSECT 
   };

   FrustumG();

   void setCamInternals(float fovY, UInt32 width, UInt32 height, float nearD, float farD);

   void update(const Vec3& eye, const Vec3& lookAt, const Vec3& up);

   void print() const;

////////////////////////////////////////////////////////////////

   bool pointInFrustum(const Vec3& point) const;
   int sphereInFrustum(const Vec3& center, float radius) const;
   int boxInFrustum   (const AABox& box) const;

//protected:

   // clipping planes
   Plane mClipPlanes[P_AMOUNT];

   // frustum pyramid points
   Vec3 mNTL, mNTR, mNBL, mNBR, mFTL, mFTR, mFBL, mFBR;

   // camera configuration
   float mNearD, mFarD, mRatio, mFovY;

   // create for optimization, to avoid extra-calculation
   float mNW, mNH, mFW, mFH;

};


#endif