Re: [Algorithms] Scroll direction algorithm

[Jeff R. <je...@8m...>]

You can try to project the texture 'U axis' into view space, or world space,
and then you can know which direction you want the texture scrolling in.

Jeff


On Mon, Sep 28, 2009 at 11:22 AM, Zafar Qamar
<zaf...@co...>wrote:

>  Hi,
>
>
>
> I have a question about an algorithm in a shader. I hope this is the right
> place to post.
>
>
>
> I basically have a mesh that has a texture on. In my shader I want the
> effect to generally look like it is moving across the mesh from left to
> right. Imagine it is a simple scrolling texture with some spots on, for the
> case of this question.
>
>
>
> However, the mesh has been UV mapped such that generally the texture looks
> like it is scrolling in the right direction, but some areas have the texture
> scrolling in completely the wrong direction.
>
>
>
> Is there some maths algorithm I can use to possibly get around this?
>
>
>
> I apologise if my question is not clear.
>
>
>
> Cheers
>
> Zafar Qamar
>
>
>
>
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-- 
Jeff Russell
Engineer, 8monkey Labs
www.8monkeylabs.com