90 lines
3.3 KiB
C++
90 lines
3.3 KiB
C++
#include "stdafx.h"
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#include "FrustumData.h"
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float** m_Frustum;
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FrustumData::FrustumData()
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{
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m_Frustum = new float *[16];
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for( int i = 0; i < 16; i++ ) m_Frustum[i] = new float[16];
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proj = floatArray( 16 );
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modl = floatArray( 16 );
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clip = floatArray( 16 );
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}
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FrustumData::~FrustumData()
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{
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delete[] proj.data;
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delete[] modl.data;
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delete[] clip.data;
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for( int i = 0; i < 16; i++ ) delete[] m_Frustum[i];
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delete[] m_Frustum;
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}
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bool FrustumData::pointInFrustum(float x, float y, float z)
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{
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for (int i = 0; i < 6; i++)
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{
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if (m_Frustum[i][A] * x + m_Frustum[i][B] * y + m_Frustum[i][C] * z + m_Frustum[i][D] <= 0)
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{
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return false;
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}
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}
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return true;
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}
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bool FrustumData::sphereInFrustum(float x, float y, float z, float radius)
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{
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for (int i = 0; i < 6; i++)
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{
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if (m_Frustum[i][A] * x + m_Frustum[i][B] * y + m_Frustum[i][C] * z + m_Frustum[i][D] <= -radius)
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{
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return false;
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}
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}
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return true;
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}
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bool FrustumData::cubeFullyInFrustum(double x1, double y1, double z1, double x2, double y2, double z2)
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{
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for (int i = 0; i < 6; i++)
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{
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if (!(m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0)) return false;
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if (!(m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0)) return false;
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if (!(m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0)) return false;
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if (!(m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0)) return false;
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if (!(m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0)) return false;
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if (!(m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0)) return false;
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if (!(m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0)) return false;
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if (!(m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0)) return false;
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}
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return true;
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}
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bool FrustumData::cubeInFrustum(double x1, double y1, double z1, double x2, double y2, double z2)
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{
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for (int i = 0; i < 6; i++)
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{
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if (m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0) continue;
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if (m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0) continue;
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if (m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0) continue;
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if (m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0) continue;
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if (m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0) continue;
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if (m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0) continue;
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if (m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0) continue;
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if (m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0) continue;
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return false;
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}
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return true;
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}
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bool FrustumData::isVisible(AABB *aabb)
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{
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return cubeInFrustum(aabb->x0, aabb->y0, aabb->z0, aabb->x1, aabb->y1, aabb->z1);
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} |