private void integerTrackbarControlNeighborsCount_ValueChanged(IntegerTrackbarControl _Sender, int _FormerValue)
{
int NeighborsCount = integerTrackbarControlNeighborsCount.Value;
if (m_SB_Neighbors != null)
{
m_SB_Neighbors.Dispose();
}
m_SB_Neighbors = new StructuredBuffer <SB_Neighbor>(m_Device, NeighborsCount, true);
WMath.Vector[] Directions = null;
if (radioButtonHammersley.Checked)
{
double[,] Samples = m_Hammersley.BuildSequence(NeighborsCount, 2);
Directions = m_Hammersley.MapSequenceToSphere(Samples);
}
else
{
Random TempRNG = new Random();
Directions = new WMath.Vector[NeighborsCount];
for (int i = 0; i < NeighborsCount; i++)
{
Directions[i] = new WMath.Vector(2.0f * (float)TempRNG.NextDouble() - 1.0f, 2.0f * (float)TempRNG.NextDouble() - 1.0f, 2.0f * (float)TempRNG.NextDouble() - 1.0f);
Directions[i].Normalize();
}
}
Random RNG = new Random(1);
m_NeighborPositions = new float3[NeighborsCount];
m_NeighborColors = new float3[NeighborsCount];
for (int NeighborIndex = 0; NeighborIndex < NeighborsCount; NeighborIndex++)
{
float Radius = 2.0f; // Make that random!
m_NeighborPositions[NeighborIndex] = Radius * new float3(Directions[NeighborIndex].x, Directions[NeighborIndex].y, Directions[NeighborIndex].z);
float R = (float)RNG.NextDouble();
float G = (float)RNG.NextDouble();
float B = (float)RNG.NextDouble();
m_NeighborColors[NeighborIndex] = new float3(R, G, B);
m_SB_Neighbors.m[NeighborIndex].m_Position = m_NeighborPositions[NeighborIndex];
m_SB_Neighbors.m[NeighborIndex].m_Color = m_NeighborColors[NeighborIndex];
}
m_SB_Neighbors.Write(); // Upload
}
private void GenerateRays(int _RaysCount, float _MaxConeAngle, RendererManaged.StructuredBuffer <RendererManaged.float3> _Target)
{
_RaysCount = Math.Min(MAX_THREADS, _RaysCount);
WMath.Hammersley hammersley = new WMath.Hammersley();
double[,] sequence = hammersley.BuildSequence(_RaysCount, 2);
WMath.Vector[] rays = hammersley.MapSequenceToSphere(sequence, 0.5f * _MaxConeAngle);
for (int RayIndex = 0; RayIndex < _RaysCount; RayIndex++)
{
WMath.Vector ray = rays[RayIndex];
// // Scale the ray so we ensure to always walk at least a texel in the texture
// float SinTheta = (float) Math.Sqrt( 1.0 - ray.y * ray.y );
// float LengthFactor = 1.0f / SinTheta;
// ray *= LengthFactor;
_Target.m[RayIndex].Set(ray.x, -ray.z, ray.y);
}
_Target.Write();
}