points[0].x = (size / subdivision) * i;
points[0].z = (size / subdivision) * j;
points[0].y = heightmap[(int)points[0].x][(int)points[0].z];
points[0].x = (size / subdivision) * i;
points[0].z = (size / subdivision) * j;
points[0].y = heightmap[(int)points[0].x][(int)points[0].z];