createSubnode method
Implementation
NodeNode createSubnode(int index) {
// create a new subquad in the appropriate quadrant
double minx = 0.0;
double maxx = 0.0;
double miny = 0.0;
double maxy = 0.0;
switch (index) {
case 0:
minx = env!.getMinX();
maxx = centrex;
miny = env!.getMinY();
maxy = centrey;
break;
case 1:
minx = centrex;
maxx = env!.getMaxX();
miny = env!.getMinY();
maxy = centrey;
break;
case 2:
minx = env!.getMinX();
maxx = centrex;
miny = centrey;
maxy = env!.getMaxY();
break;
case 3:
minx = centrex;
maxx = env!.getMaxX();
miny = centrey;
maxy = env!.getMaxY();
break;
}
Envelope sqEnv = new Envelope(minx, maxx, miny, maxy);
NodeNode node = NodeNode(sqEnv, level - 1);
return node;
}