lightcontrib.cpp

  Vector3 getLightContributionZ1(float x, float y)
	{
		float wedgeVolumeX = x / 2;
		float wedgeVolumeY = y / 2;
		float cornerVolume = x * y / 6;
		
		float contribX = wedgeVolumeX - cornerVolume;
		float contribY = wedgeVolumeY - cornerVolume;
		
		return Vector3(contribX, contribY, 1 - contribX - contribY);
	}
	
	Vector3int32 getLightContribution(const Vector3& direction)
	{
		float x = fabsf(direction.x);
		float y = fabsf(direction.y);
		float z = fabsf(direction.z);
		
		if (z > y && z > x)
		{
			Vector3 result = getLightContributionZ1(x / z, y / z);
			
			return convertToFixedPoint16(result.x, result.y, result.z);
		}
		else if (y > z && y > x)
		{
			Vector3 result = getLightContributionZ1(x / y, z / y);
			
			return convertToFixedPoint16(result.x, result.z, result.y);
		}
		else
		{
			Vector3 result = getLightContributionZ1(y / x, z / x);
			
			return convertToFixedPoint16(result.z, result.x, result.y);
		}
	}