static void FillRandomVectors(SharpDX.DataStream stream)
{
float maxTapMag = -1;
for (uint i = 0; i < NUM_SAMPLES; i++)
{
float curr = m_filterKernel[i].Length();
maxTapMag = (float)System.Math.Max(maxTapMag, curr);
}
float maxTapMagInv = 1.0f / maxTapMag;
float rsum = 0.0f;
Vector4[] occluderPoints = new Vector4[NUM_SAMPLES];
Vector4[] occluderPointsFlipped = new Vector4[NUM_SAMPLES];
for (uint i = 0; i < NUM_SAMPLES; i++)
{
Vector2 tapOffs = new Vector2(m_filterKernel[i].X * maxTapMagInv, m_filterKernel[i].Y * maxTapMagInv);
occluderPoints[i].X = tapOffs.X;
occluderPoints[i].Y = tapOffs.Y;
occluderPoints[i].Z = 0;
occluderPoints[i].W = (float)System.Math.Sqrt(1 - tapOffs.X * tapOffs.X - tapOffs.Y * tapOffs.Y);
rsum += occluderPoints[i].W;
//
occluderPointsFlipped[i].X = tapOffs.X;
occluderPointsFlipped[i].Y = -tapOffs.Y;
}
var colorScale = 1.0f / (2 * rsum);
colorScale *= Params.ColorScale;
for (uint i = 0; i < NUM_SAMPLES; i++)
{
stream.Write(occluderPoints[i]);
}
for (uint i = 0; i < NUM_SAMPLES; i++)
{
stream.Write(occluderPointsFlipped[i]);
}
}