Work on new OpenGL example.

examples/OpenGL/Shapes.cpp

@@ -0,0 +1,46 @@
+#include "Shapes.h"
+
+using namespace PolyVox;
+
+void createSphereInVolume(BlockVolume<uint8>& volData, float fRadius, uint8 uValue)
+{
+	//This vector hold the position of the center of the volume
+	Vector3DFloat v3dVolCenter(volData.getSideLength() / 2, volData.getSideLength() / 2, volData.getSideLength() / 2);
+
+	//This three-level for loop iterates over every voxel in the volume
+	for (int z = 0; z < volData.getSideLength(); z++)
+	{
+		for (int y = 0; y < volData.getSideLength(); y++)
+		{
+			for (int x = 0; x < volData.getSideLength(); x++)
+			{
+				//Store our current position as a vector...
+				Vector3DFloat v3dCurrentPos(x,y,z);	
+				//And compute how far the current position is from the center of the volume
+				float fDistToCenter = (v3dCurrentPos - v3dVolCenter).length();
+
+				//If the current voxel is less than 'radius' units from the center
+				//then we make it solid, otherwise we make it empty space.
+				if(fDistToCenter <= fRadius)
+				{
+					volData.setVoxelAt(x,y,z, uValue);
+				}
+			}
+		}
+	}
+}
+
+void createCubeInVolume(BlockVolume<uint8>& volData, Vector3DUint16 lowerCorner, Vector3DUint16 upperCorner, uint8 uValue)
+{
+	//This three-level for loop iterates over every voxel between the specified corners
+	for (int z = lowerCorner.getZ(); z <= upperCorner.getZ(); z++)
+	{
+		for (int y = lowerCorner.getY(); y <= upperCorner.getY(); y++)
+		{
+			for (int x = lowerCorner.getX() ; x <= upperCorner.getX(); x++)
+			{
+				volData.setVoxelAt(x,y,z, uValue);
+			}
+		}
+	}
+}