[Algorithms] Scroll direction algorithm

[Zafar Q. <zaf...@co...>]

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
**********************************************************************************
Disclaimer

The information and attached documentation in this e-mail is intended for the use of the addressee only and is confidential. If you are not the intended recipient please delete it and notify us immediately by telephoning or e-mailing the sender. Please note that without Codemasters’ prior written consent any form of distribution, copying or use of this communication or the information in it is strictly prohibited and may be unlawful. 

Attachments to this e-mail may contain software viruses. You are advised to take all reasonable precautions to minimise this risk and to carry out a virus check on any documents before they are opened.

Any offer contained in this communication is subject to Codemasters’ standard terms & conditions and must be signed by both parties. Except as expressly provided otherwise all information and attached documentation in this e-mail is subject to contract and Codemasters’ board approval.
Any views or opinions expressed are solely those of the author and do not necessarily represent those of Codemasters.

This footnote also confirms that this email message has been swept by
SurfControl for the presence of computer viruses.
**********************************************************************************