computeKeyLevel method

void computeKeyLevel(
  1. int level,
  2. Envelope itemEnv
)

Implementation

void computeKeyLevel(int level, Envelope itemEnv) {
  double quadSize = math.pow(2.0, level) as double;
  pt.x = (itemEnv.getMinX() / quadSize).floorToDouble() * quadSize;
  pt.y = (itemEnv.getMinY() / quadSize).floorToDouble() * quadSize;
  env.init(pt.x, pt.x + quadSize, pt.y, pt.y + quadSize);
}