Irrlicht Engine

hi there

i'm working on 3d user interface that features circular buttons.

as i'm not into 3d modeling, i'm planning to use simple rectangles with a circular texture and have the outer parts transparent

the problem is to check if the mouse hovers across such a widget:

a ray cast from mouse position into the scene should be the solution, but it would cause a collision even if the transparent part of the texture is being hit

is there a way to have a boundingsphere around a scenenode or something like it? or any other simple way to solve this problem...?

thanks for any help
warden

If you can get the collision point, why don't you check the point's distance from the center of the button and do a radius test?

yeah youre right, I just woke up and had the same solution. keep it simple, stupid! thanks!!