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Help please
show user profile  rob@dynamic
Hi all,

Right i'm having a few issues...It's relating to my final uni project (3D learning environment). Basically i have the environment modeled and has imported into XNA without any problems.

However one of the programmers has just got back to me and said he cant add the collision detection because of thetype of 'Vertex Format', apparenty it's numerical and shouldn't be?

Neither of us have a clue what this means? Can anyone shed any light on it for me please?

What is 'Vertext Format'?

And how do i change it from 'numerical' and what should it be changed to for the collision detection to work in XNA?

Any help would be much appreciated. Cheers


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read 561 times
3/25/2009 12:52:08 PM (last edit: 3/25/2009 12:52:08 PM)
show user profile  horizon
Is it a one way communication? Why don't you ask him?


read 544 times
3/25/2009 1:46:54 PM (last edit: 3/25/2009 1:46:54 PM)
show user profile  rob@dynamic
I have, he came to me with the problem because he doesn't know what it means.


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read 539 times
3/25/2009 2:04:34 PM (last edit: 3/25/2009 2:04:34 PM)
show user profile  rob@dynamic
I've just done some research and found out it maybe due to 'vertex data channels'

it mentions more than one channel of texture co-ordinates and vertex colour data?

Does anyone know what these are?

cheers


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read 500 times
3/26/2009 4:30:50 AM (last edit: 3/26/2009 4:30:50 AM)
show user profile  advance-software
A vertex format describes what information is sent to the GPU vertex shader per vertex.

It includes :-

Vertex position [always].
Vertex normal [usually].
Texture co-ordinates [usually one set, but sometimes more, sometimes none].
Optional vertex colour.

In order to perform collision detection you only need to process the vertex position information and connectivity (stored in the face data, not the vertices).

Vertex shaders are used for projection, vertex lighting, skinning, etc.

Aren't there any XNA forums anywhere ?!
read 489 times
3/26/2009 4:55:33 AM (last edit: 3/26/2009 4:59:39 AM)
show user profile  rob@dynamic
cheers, yea iv posted on xna forums too. just wasnt sure whether it was a max or xna issue. we think we've resovled it now by updating the collision library.


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read 473 times
3/26/2009 5:37:25 AM (last edit: 3/26/2009 5:37:25 AM)
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