56 lines
1.3 KiB
C++
Executable File
56 lines
1.3 KiB
C++
Executable File
//***********************************************************
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//
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// Name: Frustum.H
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// Last Update: 24/2/02
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// Author: Poya Manouchehri
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//
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// Description: CFrustum is a collection of planes which define
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// a viewing space. Usually associated with the
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// camera, there are 6 planes which define the
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// view pyramid. But we allow more planes per
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// frustum which maybe used for portal rendering,
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// where a portal may have 3 or more edges.
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//
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//***********************************************************
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#ifndef FRUSTUM_H
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#define FRUSTUM_H
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#include "Plane.H"
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//10 planes should be enough
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#define MAX_NUM_FRUSTUM_PLANES (10)
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struct SBoundingBox
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{
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CVector3D m_BoxMin;
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CVector3D m_BoxMax;
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};
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class CFrustum
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{
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public:
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CFrustum ();
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~CFrustum ();
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//Set the number of planes to use for
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//calculations. This is clipped to
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//[0,MAX_NUM_FRUSTUM_PLANES]
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void SetNumPlanes (int num);
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//The following methods return true if the shape is
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//partially or completely in front of the frustum planes
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bool IsPointVisible (CVector3D &point);
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bool IsSphereVisible (CVector3D ¢er, float radius);
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bool IsBoxVisible (CVector3D &position, SBoundingBox &bounds);
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public:
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//make the planes public for ease of use
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CPlane m_aPlanes[MAX_NUM_FRUSTUM_PLANES];
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private:
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int m_NumPlanes;
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};
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#endif |