CameraProject & aspect ratio

Blitz3D Forums/Blitz3D Programming/CameraProject & aspect ratio

Tom	(Posted 2004) [#1]

Hi,

I'm a bit confused as to how Blitzs Zoom works. I'm still trying to find a fast equivalent of CameraProject that doesn't clip values and noticed that even with a square screen/viewport, BBs own CameraProject returns non 1:1 aspect ratio values, any idea why it happens?

I'd expect equal x,y returns from this but I get 281.6,230.4

Graphics3D 512,512,32,2
cam=CreateCamera()
CameraViewport cam,0,0,512,512
CameraProject cam,2,2,20
Print ProjectedX()+","+ProjectedY()
WaitKey
End

Cheers
Tom

big10p

(Posted 2004) [#2]

Those results look right to me. I think you might be misunderstanding what CameraProject does:

"Projects the world coordinates x,y,z on to the 2D screen."

Tom	(Posted 2004) [#3]

Hi,

Quite right, need to subtract ProjectedY() from screenheight :)

classic 'doh!'

Tom