vade

Question for you ladies and gents. Say I have two shaders, and I want 

to bind them both to jit.gl.model. Is this even possible? Do I need 

to combine the code? Say one adds noise to the verts, and the other 

does some lighting stuff? Is this not possible?

Ive tried a few variations of shader messages to jit.gl.model, but 

have gotten no errors, but no results. Thanks, super curious as to 

Question for you ladies and gents. Say I have two shaders, and I want  
to bind them both to jit.gl.model. Is this even possible? Do I need  
to combine the code? Say one adds noise to the verts, and the other  
does some lighting stuff? Is this not possible?

Ive tried a few variations of shader messages to jit.gl.model, but  
have gotten no errors, but no results. Thanks, super curious as to  
how this would be accomplished.

binding-multiple-shaders

This is not possible. Only 1 vertex and 1 fragment shader can be

bound at any given time. Combine the code or do > 1 pass and add the

> Question for you ladies and gents. Say I have two shaders, and I want to

> bind them both to jit.gl.model. Is this even possible? Do I need to combine

> the code? Say one adds noise to the verts, and the other does some lighting

> Ive tried a few variations of shader messages to jit.gl.model, but have

> gotten no errors, but no results. Thanks, super curious as to how this would

This is not possible.  Only 1 vertex and 1 fragment shader can be
bound at any given time.  Combine the code or do > 1 pass and add the
results together.

On 6/26/07, vade  wrote:
>  Hi.
>
> Question for you ladies and gents. Say I have two shaders, and I want to
> bind them both to jit.gl.model. Is this even possible? Do I need to combine
> the code? Say one adds noise to the verts, and the other does some lighting
> stuff? Is this not possible?
>
> Ive tried a few variations of shader messages to jit.gl.model, but have
> gotten no errors, but no results. Thanks, super curious as to how this would
> be accomplished.
>
>
> v a d e //
>
> www.vade.info
> abstrakt.vade.info
>
>
>
>
>
>


Ah. Ok. I was wondering how apps like Maya and Modo handle this, 

because they have bindings for multiple shaders, but I guess they do 

multiple passes, which is why they have opacity and blend mode 

controls, since they are outputting bitmaps for each pass.

On Jun 26, 2007, at 3:04 PM, Wesley Smith wrote:

> This is not possible. Only 1 vertex and 1 fragment shader can be

> bound at any given time. Combine the code or do > 1 pass and add the

>> Question for you ladies and gents. Say I have two shaders, and I 

>> bind them both to jit.gl.model. Is this even possible? Do I need 

>> the code? Say one adds noise to the verts, and the other does some 

>> Ive tried a few variations of shader messages to jit.gl.model, but 

>> gotten no errors, but no results. Thanks, super curious as to how 

Ah. Ok. I was wondering how apps like Maya and Modo handle this,  
because they have bindings for multiple shaders, but I guess they do  
multiple passes, which is why they have opacity and blend mode  
controls, since they are outputting bitmaps for each pass.

> This is not possible.  Only 1 vertex and 1 fragment shader can be
> bound at any given time.  Combine the code or do > 1 pass and add the
> results together.
>
> wes
>
> On 6/26/07, vade  wrote:
>>  Hi.
>>
>> Question for you ladies and gents. Say I have two shaders, and I  
>> want to
>> bind them both to jit.gl.model. Is this even possible? Do I need  
>> to combine
>> the code? Say one adds noise to the verts, and the other does some  
>> lighting
>> stuff? Is this not possible?
>>
>> Ive tried a few variations of shader messages to jit.gl.model, but  
>> have
>> gotten no errors, but no results. Thanks, super curious as to how  
>> this would
>> be accomplished.
>>
>>
>> v a d e //
>>
>> www.vade.info
>> abstrakt.vade.info
>>
>>
>>
>>
>>
>>

"or do > 1 pass and add the results together"

Old thread, I know..
But what means Wesley here with:

you render the scene with one shader attached, store the resulting texture - there are different ways of doing this, one possibility could be the @capture attribute with jit.gl.camera (my preference) - and then attach the other shader and capture the scene again, then take the two textures and blend them together with an object like jit.gl.slab. which leads to the final result.

Thanks, but I dont want to process textures . I thought there is a way to combine for example a vertex shader and lighting shaders..

if you mean by lighting shader a fragmentshader (there is no such thing as a lighting shader to my knowledge. only shaders that deal with lighting), then yes, it is possible to combine the two. if you look at the shader-examples of jitter you will see how this is done.

however to clearify: it is possible to attach only one shader-file to an model. but the shader-file itself is structured into (usually) two parts: a vertex shader, that deals with each vertice, and a fragment shader, that deals with each pixel of the output texture. inbetween the two there can also be a geometry shader, that allows to create (add) new vertices and faces based on vertices of the model. I thinks there are some examples of this as well somehwere hidden inside the jitter-shader folder.

Thanks again, but I cant find any example in jitter-examples/render/shaders that combines a fragment and a vertex shader..

or even two shaders of that type. In my case im using a vertex shader bind to a mesh but I also want to use a phong shader..

Thanks again, but I cant find any example in jitter-examples/render/shaders that combines a fragment and a vertex shader..
or even two shaders of that type. In my case im using a vertex shader bind to a mesh but I also want to use a phong shader..


look here: Max 6.1/Cycling '74/jitter-shaders/material

Binding multiple shaders ?