peter

How can i get a texture out of Jitter on the GPU?

I want to map a videotexture on a jit.gl.model with my fragmentshader. But how can i get a texture out of Jitter on the GPU? The uniform and varying parameters are no problem.

how-can-i-get-a-texture-out-of-jitter-on-the-gpu

I don't really understand what you mean by "getting a texture "out of

but if what you want is to get your texture mapped on your model, simply

a message "texture mytexture" to your GL object.

If you want to get it "back" from the GPU to jitter matrix, send "to_matrix

to your jit.gl.texture object with a matrix named mymatrix.

On Tue, 20 Nov 2007 07:45:40 -0700, peter wrote:

> How can i get a texture out of Jitter on the GPU?

> I want to map a videotexture on a jit.gl.model with my fragmentshader.

> how can i get a texture out of Jitter on the GPU? The uniform and varying

I don't really understand what you mean by "getting a texture "out of
jitter on the GPU",
but if what you want is to get your texture mapped on your model, simply
send
a message "texture mytexture" to your GL object.
If you want to get it "back" from the GPU to jitter matrix, send "to_matrix
mymatrix"
to your jit.gl.texture object with a matrix named mymatrix.
hope this helps//

On Tue, 20 Nov 2007 07:45:40 -0700, peter  wrote:
> How can i get a texture out of Jitter on the GPU?
>
> I want to map a videotexture on a jit.gl.model with my fragmentshader.
But
> how can i get a texture out of Jitter on the GPU? The uniform and varying
> parameters are no problem.
>
> TNX
>
> 


i am a beginner in jitter but i can programm in CG so i need to load the video out of jitter into my fragment shader as a sampler2D. I tried to send

a message "texture mytexture" but it doesn`t work maybe because of a wrong jxs file definition.

i am a beginner in jitter but i can programm in CG so i need to load the video out of jitter into my fragment shader as a sampler2D. I tried to send
a message "texture mytexture" but it doesn`t work  maybe because of a wrong jxs file definition.


Textures in jitter default to sampler2DRect

to make a square texture use a POT matrix (not mandatory but good 

practice), and send it to a jit.gl.texture @name 

Within your shader you have to use the jxs file format to bind the 

textures to a texture unit. Within the JXS you specify your texture 

variables as integer and default value as the texture unit index

You can then send to a openGL geometry object something like

and the texture should be bound to unit 1, and the shader should 

On Nov 20, 2007, at 1:11 PM, peter wrote:

> i am a beginner in jitter but i can programm in CG so i need to load 

> the video out of jitter into my fragment shader as a sampler2D. I 

> a message "texture mytexture" but it doesn`t work maybe because of 

to make a square texture use a POT matrix (not mandatory but good  
practice), and send it to a jit.gl.texture  @name  
 @rectangle 0

Within your shader you have to use the jxs file format to bind the  
textures to a texture unit. Within the JXS you specify your texture  
variables as integer and default value as the texture unit index

and the texture should be bound to unit 1, and the shader should  
reference it.

>
> i am a beginner in jitter but i can programm in CG so i need to load  
> the video out of jitter into my fragment shader as a sampler2D. I  
> tried to send
> a message "texture mytexture" but it doesn`t work  maybe because of  
> a wrong jxs file definition.


One thing about jit.gl.model you should know. When it loads a model

file and/or gets a texture message, it rebuilds the displaylist and

fixes any texture settings. So, if you attach a texture and try to

change say the mipmap filter types, it won't register until you toggle

out of and back into the texture. This has been remedied for future

releases, but is something to be aware of in the current release.

> Textures in jitter default to sampler2DRect

> to make a square texture use a POT matrix (not mandatory but good

> practice), and send it to a jit.gl.texture @name

> Within your shader you have to use the jxs file format to bind the

> textures to a texture unit. Within the JXS you specify your texture

> variables as integer and default value as the texture unit index

> You can then send to a openGL geometry object something like

> and the texture should be bound to unit 1, and the shader should

> On Nov 20, 2007, at 1:11 PM, peter wrote:

> > i am a beginner in jitter but i can programm in CG so i need to load

> > the video out of jitter into my fragment shader as a sampler2D. I

> > a message "texture mytexture" but it doesn`t work maybe because of

Hi,
One thing about jit.gl.model you should know.  When it loads a model
file and/or gets a texture message, it rebuilds the displaylist and
fixes any texture settings.  So, if you attach a texture and try to
change say the mipmap filter types, it won't register until you toggle
out of and back into the texture.  This has been remedied for future
releases, but is something to be aware of in the current release.

On 11/20/07, vade  wrote:
> Textures in jitter default to sampler2DRect
>
> to make a square texture use a POT matrix (not mandatory but good
> practice), and send it to a jit.gl.texture  @name
>  @rectangle 0
>
> Within your shader you have to use the jxs file format to bind the
> textures to a texture unit. Within the JXS you specify your texture
> variables as integer and default value as the texture unit index
>
> You can then send to a openGL geometry object something like
>
>
> shader , texture 
>
> and the texture should be bound to unit 1, and the shader should
> reference it.
>
>
>
> On Nov 20, 2007, at 1:11 PM, peter wrote:
>
> >
> > i am a beginner in jitter but i can programm in CG so i need to load
> > the video out of jitter into my fragment shader as a sampler2D. I
> > tried to send
> > a message "texture mytexture" but it doesn`t work  maybe because of
> > a wrong jxs file definition.
>
>


-> error: jit.gl.shader integer parameters not supported by CG

can you send the whole shader and a patch?

On Nov 20, 2007, at 2:29 PM, peter wrote:

> -> error: jit.gl.shader integer parameters not supported by CG

>
> in the jxs:	
>
> -> error: jit.gl.shader integer parameters not supported by CG


What version of Jitter do you have? The CG texture binding was fixed

What version of Jitter do you have?  The CG texture binding was fixed
in a very recent version.
wes

On 11/20/07, peter  wrote:
> the patch and the shader.
>
>
>
>
>


Ok, im not a CG guy, I just know enough GLSL to seem like I know what 

I am doing, so take this with a grain of salt:

First things I notice float4/float3 are not a valid params to pass for 

type in a jxs file. You must use vec4 and vec3, same with arrays of 

floats, which are matrices, should be described as mat4s in the JXS.

second your jit.gl.texture object does not have a context associated 

On Nov 20, 2007, at 3:01 PM, peter wrote:

Ok, im not a CG guy, I just know enough GLSL to seem like I know what  
I am doing, so take this with a grain of salt:

First things I notice float4/float3 are not a valid params to pass for  
type in a jxs file. You must use vec4 and vec3, same with arrays of  
floats, which are matrices, should be described as mat4s in the JXS.

second your jit.gl.texture object does not have a context associated  
to it.

id also check appendix c of the jitter docs, which describe the valid 

The name of the datatype for the parameter values.

Valid types are: int, float, vec2-4, float2-4, mat2-4

id also check appendix c of the jitter docs, which describe the valid  
parameters. Page 528.

The name of the datatype for the parameter values.
Valid types are: int, float, vec2-4, float2-4, mat2-4

doh. I love how I quote text that contradicts what I said initially. 

> id also check appendix c of the jitter docs, which describe the 

> The name of the datatype for the parameter values.

> Valid types are: int, float, vec2-4, float2-4, mat2-4

> On Nov 20, 2007, at 3:01 PM, peter wrote:

doh. I love how I quote text that contradicts what I said initially.  
hahah. large grain of salt indeed!

> id also check appendix c of the jitter docs, which describe the  
> valid parameters. Page 528.
>
> The name of the datatype for the parameter values.
> Valid types are: int, float, vec2-4, float2-4, mat2-4
>
>
>
> On Nov 20, 2007, at 3:01 PM, peter wrote:
>
>> the patch and the shader.
>>
>


Attached is a Phong shader using textures. The Jitter docs haven't

been updated since cg texture support was added. The use is as

Attached is a Phong shader using textures.  The Jitter docs haven't
been updated since cg texture support was added.  The use is as
follows 

ok when i send a "bind" message to the jit.gl.texture it works an i can see the texture on the model. But now i get the error 

ok when i send a "bind" message to the jit.gl.texture it works an i can see the texture on the model. But now i get the error 
-> GL error Stack overflow
so far so good


There is, but maybe not if you're using the forum. Here's an URL:

http://www.mat.ucsb.edu/~whsmith/mat.phong.cg.tex.jxs

There is, but maybe not if you're using the forum.  Here's an URL:
http://www.mat.ucsb.edu/~whsmith/mat.phong.cg.tex.jxs
wes

On 11/21/07, peter  wrote:
>
> sorry, but there is no shader attached
>
