Function NormalDistribution

trinity/PostProcess/Tr2PostProcessRenderer.cpp:222–233

{

float NormalDistribution( float x, float sigma, float weight )
{
	const float dx = std::abs( x );
	const float clampedOneMinusDX = std::max( 0.0f, 1.0f - ( dx * dx ) );

	if( weight > 1.0f )
	{
		return std::pow( clampedOneMinusDX, weight );
	}
	const float gaussian = std::exp( -TRI_PI * 5.0f * ( ( dx * dx ) / ( sigma * sigma ) ) );
	return Lerp( gaussian, clampedOneMinusDX, weight );
}

GaussianData CalculateGaussianPassParameters( float radius, float centerWeight, float normalizingFactor, Vector3 overallWeight, Vector2 direction )
{