public virtual bool Act(double x, double y, double z, ref Voxel voxel)
{
var vpos = new Vector3d(x, y, z);
var distanceSquared = position.DistanceSquared(vpos);
if (distanceSquared < radiusSquared)
{
var px = (int)((x - (position.x - radius)) * stepInverse);
var py = (int)((y - (position.y - radius)) * stepInverse);
var pz = (int)((z - (position.z - radius)) * stepInverse);
if (px >= 0 && px < size - 1 && py >= 0 && py < size - 1 && pz >= 0 && pz < size - 1)
{
var pointInCell = vpos - new Vector3d(px * step + (position.x - radius),
py * step + (position.y - radius),
pz * step + (position.z - radius));
pointInCell *= stepInverse;
var interpolated = UMath.TrilinearInterpolate(
GetVoxelValue(voxelValues, px, py, pz),
GetVoxelValue(voxelValues, px, py, pz + 1),
GetVoxelValue(voxelValues, px, py + 1, pz),
GetVoxelValue(voxelValues, px, py + 1, pz + 1),
GetVoxelValue(voxelValues, px + 1, py, pz),
GetVoxelValue(voxelValues, px + 1, py, pz + 1),
GetVoxelValue(voxelValues, px + 1, py + 1, pz),
GetVoxelValue(voxelValues, px + 1, py + 1, pz + 1),
pointInCell
);
voxel.Value = UMath.Lerp(interpolated, voxel.Value, distanceSquared * radiusSquaredInverse);
}
}
return(false);
}