How to make a scrolling texture for conveyor belt

MikeR · Post by **MikeR** » Fri Dec 23, 2005 3:13 am

You can throw this idea out the window if you want, but, have you thought about placing a color on your belt? Then if you want, say a line down the middle of the belt, draw that with a 2dline. (don't ask me how tho)

Eternl Knight · Post by **Eternl Knight** » Fri Dec 23, 2005 3:32 am

I don't know if it is currently possible in Irrlicht (I haven't looked), but I tend to do these types of operations using a texture matrix. If you're willing to waste GPU cycles on it - you could use a pixel shader (using a parameter for texture translation) but I think that texture matrices (implemented already or not) are what you're after...

Guest · Post by **Guest** » Fri Dec 23, 2005 12:36 pm

krama757 wrote:Emils library allows you to do what irrlicht doesnt. If you see some of his examples he combines 2D and 3D....I believe you can load an animated gif or even an avi file as a skin for a mesh.

It does, clever as I am I googled for this library and came up with nothing, because I assumed it was a standalone library for 2D stuff, not a specific library to extend Irrlicht. Though there is still the issue that it would be wasting a lot of memory and would require adjusting the play speed to the belt movement.

It wouldn't be hard to add a simple function to just call:
driver->setTextureMatrix(some_matrix)

But it would still have to be done right before this particular (sub)mesh is rendered and reset afterwards. So, one way or another the belt must be its own node with its own material or render function.