first commit

Minecraft.Client/FrustumData.cpp

@@ -0,0 +1,90 @@
+#include "stdafx.h"
+#include "FrustumData.h"    
+
+float** m_Frustum;
+
+
+FrustumData::FrustumData()
+{
+	m_Frustum = new float *[16];
+	for( int i = 0; i < 16; i++ ) m_Frustum[i] = new float[16];
+    proj = floatArray( 16 );
+    modl = floatArray( 16 );
+    clip = floatArray( 16 );
+}
+
+FrustumData::~FrustumData()
+{
+	delete[] proj.data;
+	delete[] modl.data;
+	delete[] clip.data;
+	for( int i = 0; i < 16; i++ ) delete[] m_Frustum[i];
+	delete[] m_Frustum;
+}
+
+bool FrustumData::pointInFrustum(float x, float y, float z)
+{
+    for (int i = 0; i < 6; i++)
+    {
+        if (m_Frustum[i][A] * x + m_Frustum[i][B] * y + m_Frustum[i][C] * z + m_Frustum[i][D] <= 0)
+        {
+            return false;
+        }
+    }
+    
+    return true;
+}
+
+bool FrustumData::sphereInFrustum(float x, float y, float z, float radius)
+{
+	for (int i = 0; i < 6; i++)
+	{
+		if (m_Frustum[i][A] * x + m_Frustum[i][B] * y + m_Frustum[i][C] * z + m_Frustum[i][D] <= -radius)
+		{
+			return false;
+		}
+	}
+    
+	return true;
+}
+
+bool FrustumData::cubeFullyInFrustum(double x1, double y1, double z1, double x2, double y2, double z2)
+{
+    for (int i = 0; i < 6; i++)
+    {
+        if (!(m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0)) return false;
+        if (!(m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0)) return false;
+        if (!(m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0)) return false;
+        if (!(m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0)) return false;
+        if (!(m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0)) return false;
+        if (!(m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0)) return false;
+        if (!(m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0)) return false;
+        if (!(m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0)) return false;
+    }
+    
+    return true;
+}
+
+bool FrustumData::cubeInFrustum(double x1, double y1, double z1, double x2, double y2, double z2)
+{
+    for (int i = 0; i < 6; i++)
+    {
+        if (m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0) continue;
+        if (m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0) continue;
+        if (m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0) continue;
+        if (m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z1) + m_Frustum[i][D] > 0) continue;
+        if (m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0) continue;
+        if (m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y1) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0) continue;
+        if (m_Frustum[i][A] * (x1) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0) continue;
+        if (m_Frustum[i][A] * (x2) + m_Frustum[i][B] * (y2) + m_Frustum[i][C] * (z2) + m_Frustum[i][D] > 0) continue;
+    
+        return false;
+    }
+    
+    return true;
+}
+
+bool FrustumData::isVisible(AABB *aabb)
+{
+	return cubeInFrustum(aabb->x0, aabb->y0, aabb->z0, aabb->x1, aabb->y1, aabb->z1);
+}