Picker.getSelection use top-left coordinate system & accept 'x, y, [width], [height]' arguments, see #874 (#883)
Picker.getSelection use top-left coordinate system & accept 'x, y, [width], [height]' arguments, see #874 (#883)

* Picker.getSelection use top-left coordinate system & accept 'x, y, [width], [height]' arguments, see #874

* fix getSelection bug

aidinabedi/playcanvas-engine,guycalledfrank/engine,aidinabedi/playcanvas-engine,H1Gdev/engine,MicroWorldwide/PlayCanvas,playcanvas/engine,H1Gdev/engine,playcanvas/engine,sereepap2029/playcanvas,sereepap2029/playcanvas,MicroWorldwide/PlayCanvas,guycalledfrank/engine,sereepap2029/playcanvas