public void Execute(int index)
{
var chunk = Chunks[index];
var instanceBounds = chunk.GetNativeArray(WorldMeshRenderBoundsType);
if (instanceBounds.Length == 0)
{
return;
}
// TODO: Improve this approach
// See: https://www.inf.ethz.ch/personal/emo/DoctThesisFiles/fischer05.pdf
var chunkBounds = new WorldMeshRenderBounds();
for (int j = 0; j < instanceBounds.Length; j++)
{
chunkBounds.Center += instanceBounds[j].Center;
}
chunkBounds.Center /= instanceBounds.Length;
for (int j = 0; j < instanceBounds.Length; j++)
{
float r = math.distance(chunkBounds.Center, instanceBounds[j].Center) + instanceBounds[j].Radius;
chunkBounds.Radius = math.select(chunkBounds.Radius, r, r > chunkBounds.Radius);
}
ChunkBounds[index] = chunkBounds;
}
public InsideResult Inside(WorldMeshRenderBounds bounds)
{
var center = new float4(bounds.Center.x, bounds.Center.y, bounds.Center.z, 1.0f);
var leftDistance = math.dot(Left, center);
var rightDistance = math.dot(Right, center);
var downDistance = math.dot(Down, center);
var upDistance = math.dot(Up, center);
var nearDistance = math.dot(Near, center);
var farDistance = math.dot(Far, center);
var leftOut = leftDistance < -bounds.Radius;
var rightOut = rightDistance < -bounds.Radius;
var downOut = downDistance < -bounds.Radius;
var upOut = upDistance < -bounds.Radius;
var nearOut = nearDistance < -bounds.Radius;
var farOut = farDistance < -bounds.Radius;
var anyOut = leftOut || rightOut || downOut || upOut || nearOut || farOut;
var leftIn = leftDistance > bounds.Radius;
var rightIn = rightDistance > bounds.Radius;
var downIn = downDistance > bounds.Radius;
var upIn = upDistance > bounds.Radius;
var nearIn = nearDistance > bounds.Radius;
var farIn = farDistance > bounds.Radius;
var allIn = leftIn && rightIn && downIn && upIn && nearIn && farIn;
if (anyOut)
{
return(InsideResult.Out);
}
if (allIn)
{
return(InsideResult.In);
}
return(InsideResult.Partial);
}