switch examples to use rangeU and rangeV
switch examples to use rangeU and rangeV

ChristopherChudzicki/math3d,stardust66/math3d,ChristopherChudzicki/math3d,ChristopherChudzicki/math3d,stardust66/math3d,ChristopherChudzicki/math3d,stardust66/math3d,stardust66/math3d