private unsafe void populateSlice(float *slice, int sliceIndex)
{
int index = 0;
float grid4x = GridSize * 4;
for (int dy = 0; dy < Resolution; dy++)
{
float3 position0 = new float3(0, dy * GridSize, sliceIndex * GridSize) + GridCorner;
float3 position1 = position0 + new float3(GridSize, 0, 0);
float3 position2 = position1 + new float3(GridSize, 0, 0);
float3 position3 = position2 + new float3(GridSize, 0, 0);
for (int dx = 0; dx < Resolution; dx += 4)
{
float4 distances = SDF.Sample(position0, position1, position2, position3);
slice[index++] = distances.x;
slice[index++] = distances.y;
slice[index++] = distances.z;
slice[index++] = distances.w;
position0.x += grid4x;
position1.x += grid4x;
position2.x += grid4x;
position3.x += grid4x;
}
}
}
public void Execute(int index)
{
float x = index % TextureWidth;
float y = index / TextureWidth;
float3 pos = RectCorner + x * RectXAxis + y * RectYAxis;
float dist = SDF.Sample(pos);
float ring = smoothstep(0.0f, 0.1f, abs(frac(abs(dist) * 3f) - 0.5f));
float color = smoothstep(-0.02f, 0.02f, dist);
Texture[index] = ring * Color.Lerp(new Color(1, 0, 0, 1), new Color(0, 1, 0, 1), color);
}
private void tryBuildInDirection(int3 cell00, int3 dirA, int3 dirB, int3 normal)
{
int3 cell01 = cell00 + dirA;
int3 cell10 = cell00 + dirB;
int3 cell11 = cell01 + dirB;
int index00, index01, index10, index11;
if (!VertexMap.TryGetValue(cell00, out index00))
{
return;
}
if (!VertexMap.TryGetValue(cell01, out index01))
{
return;
}
if (!VertexMap.TryGetValue(cell10, out index10))
{
return;
}
if (!VertexMap.TryGetValue(cell11, out index11))
{
return;
}
float3 centerPos0 = (float3)cell11 * GridSize + GridCorner;
float dist0 = SDF.Sample(centerPos0);
if (dist0 < 0)
{
TriQueue.Enqueue(new int3(index00, index01, index11));
TriQueue.Enqueue(new int3(index00, index11, index10));
}
else
{
TriQueue.Enqueue(new int3(index01, index00, index11));
TriQueue.Enqueue(new int3(index11, index00, index10));
}
}