frustum.h

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// ==========================================================================================================
//
// BREW v2.0+ OPENGLES MICROENGINE
//
// ----------------------------------------
//
// Written by Vander Nunes
//
// ==========================================================================================================

#ifndef __FRUSTUM_H__
  #define __FRUSTUM_H__

	#include "AEEAppGen.h"
  #include "defines.h"
	#include "math3d.h"

  #define FRUSTUM_RELATION			WORD
  #define FRUSTUM_INSIDE				1
  #define FRUSTUM_OUTSIDE				2
  #define FRUSTUM_INTERSECTING	3

  class CFrustum
  {
    public:

      CFrustum();
      ~CFrustum();

			plane3_t				m_Planes[6];

      // create frustum planes from projection matrix
			void	InitFromProjectionMatrix(matrix_t mProjection);

      // test if a bounding box is inside Frustum planes
      FRUSTUM_RELATION BoxRelation(vec3_t vMin, vec3_t vMax);
  };

#endif