remove use of float2 from bounding box example
remove use of float2 from bounding box example

malenie/thrust,allendaicool/thrust,hemmingway/thrust,malenie/thrust,hemmingway/thrust,julianromera/thrust,rdmenezes/thrust,google-code-export/thrust,UIKit0/thrust,Vishwa07/thrust,rdmenezes/thrust,UIKit0/thrust,UIKit0/thrust,lishi0927/thrust,bfurtaw/thrust,h1arshad/thrust,allendaicool/thrust,malenie/thrust,rdmenezes/thrust,google-code-export/thrust,UIKit0/thrust,hemmingway/thrust,google-code-export/thrust,levendlee/thrust,lishi0927/thrust,lishi0927/thrust,julianromera/thrust,Vishwa07/thrust,Vishwa07/thrust,Vishwa07/thrust,google-code-export/thrust,rdmenezes/thrust,bfurtaw/thrust,julianromera/thrust,h1arshad/thrust,levendlee/thrust,levendlee/thrust,bfurtaw/thrust,hemmingway/thrust,malenie/thrust,levendlee/thrust,h1arshad/thrust,bfurtaw/thrust,lishi0927/thrust,allendaicool/thrust,allendaicool/thrust,julianromera/thrust,h1arshad/thrust