booltox

I’m very new to the MAX/MSP environment so I apologize if this question is too rudimentary. But for my first MAX/MSP project I have run into a bit of problem that no level of google-ing seems to help.

I want to use a shader to iterate over a texture for a number of passes. Typically in the opengl world I would create two FBO objects and use the results of each pass as an input into the next one. Essentially I would ping-pong between them. In trying to do duplicate this behavior in MAX/MSP I have attempted to do this in a javascript node. The following code looks like it should work but it most definitely does not.

radslab1.jit_gl_texture("tex1","texture");

radslab1.jit_gl_texture("tex0", "srcTexture");

radslab0.jit_gl_texture("tex0", "srcTexture");

radslab0.jit_gl_texture(radslab1.out_name,"texture");

radslab1.jit_gl_texture(radslab0.out_name, "texture");

// outlet(1, "jit_gl_texture", radslab0.out_name);

It doesn’t appear that the using the output from the previous slab as an input to the next is working as I excepted. The shader is working for a single pass but subsequent passes are not.

Looking trough the examples I haven’t found something that does this technique. I’m hoping that somebody might have some pointers or an obvious direction that I’m over looking.

Thanks in advance if anybody has any advice,

I’m very new to the MAX/MSP environment so I apologize if this question is too rudimentary. But for my first MAX/MSP project I have run into a bit of problem that no level of google-ing seems to help. 

I want to use a shader to iterate over a texture for a number of passes. Typically in the opengl world I would create two FBO objects and use the results of each pass as an input into the next one. Essentially I would ping-pong  between them. In trying to do duplicate this behavior in MAX/MSP I have attempted to do this in a javascript node. The following code looks like it should work but it most definitely does not.

    radslab1.jit_gl_texture("tex1","texture");
    radslab1.jit_gl_texture("tex0", "srcTexture");
    radslab1.draw();

    radslab0.jit_gl_texture("tex0", "srcTexture");

    mat.jit_gl_texture(radslab0.out_name);
   // outlet(1, "jit_gl_texture", radslab0.out_name);
    outlet(0, "jit_matrix", mat.name);

Thanks in advance if anybody has any advice,
-Booltox


OpenGL FBO ping-pong like behavior with jitter? is it possible?