denio@beno.CSS.GOV (Dennis O'Neill) (12/10/90)
How would one determine the color index of the pixel under the mouse/sprite hotspot? ` I know how to find the x,y coordinates of the sprite location. I could figure out the offset into the window array from those, but I'm hoping there's a more direct way to determine the color. Dennis O'Neill denio@seismo.css.gov
mouse@LARRY.MCRCIM.MCGILL.EDU (12/11/90)
> How would one determine the color index of the pixel under the > mouse/sprite hotspot? > I know how to find the x,y coordinates of the sprite location. I > could figure out the offset into the window array from those, but I'm > hoping there's a more direct way to determine the color. I'm not sure what you mean by the "window array", but you could always just use XGetImage to read back a 1x1 image. der Mouse old: mcgill-vision!mouse new: mouse@larry.mcrcim.mcgill.edu