public override double Execute(double x, double y, double z, CallableNode flow)
{
var ix = (x - fromX) * voxel2PixelPosX;
var iz = (z - fromZ) * voxel2PixelPosZ;
var hx = Mathf.Clamp((int)ix, 0, width - 1);
var hz = Mathf.Clamp((int)iz, 0, height - 1);
if (hx < 0 || hz < 0 || hx >= width - 1 || hz >= height - 1)
{
return(0);
}
var h00 = heights[hx + width * hz];
var h01 = heights[hx + width * (hz + 1)];
var h10 = heights[(hx + 1) + width * hz];
var h11 = heights[(hx + 1) + width * (hz + 1)];
return(UMath.BilinearInterpolate(h00, h01, h10, h11, ix - hx, iz - hz));
}