getAabbAtIndex method
Get an AABB of a square in the heightfield @param xi @param yi @param result
Implementation
void getAabbAtIndex(int xi, int yi, AABB aabb){//{ lowerBound, upperBound }: AABB) {
final data = this.data;
final elementSize = this.elementSize.toDouble();
aabb.lowerBound.set(
xi * elementSize,
yi * elementSize,
data[xi][yi]
);
aabb.upperBound.set(
(xi + 1) * elementSize,
(yi + 1) * elementSize,
data[xi + 1][yi + 1]
);
}