canvas how to know the state of a pixel

[ptitjoz]

Hello
Is there a way on a canvas to know the state of a pixel?
Example know if the pixel in position 25.34 and on or off?
Thank you for your help
Best regards

[Pjot]

Hi ptitjoz,

You can use the (undocumented) HUG directive GETCOLOR$. It was added in HUG 0.99.

The prototype is as follows:

GETCOLOR$(NUMBER x, NUMBER y, NUMBER flag)


The <x,y> arguments define the position of the pixel. The <flag> indicates if you want to retrieve the alpha value as well (in case of OpenGL). If you do not use OpenGL then flag can be 0.

HTH
Peter

[ptitjoz]

Thanks Peter
This is exactly what I was looking for in information! Thanks for your quick answer.
Best regards