Ok figured it out - have a working link between shader and gemvertexbuffer. Will send a full 1st draft cpp/h sometime in next two weeks hopefully.
On Wed, Aug 27, 2014 at 2:19 PM, j-p <[email protected]> wrote: > (follow up) > > Below is the test setup for a user-defined attribute in > gemvertexbuffer.cpp: > (m_shader is the 5th vbo for test, attribute index is set to 0) > (just for this test I have set the program parameter in > "glBindAttribLocation" to "1" because of this output when a glsl_program is > linked with vert/frag shaders for the first time: > "[glsl_program]: linked shaders 4 2: 1") > > code: > > if(m_shader.render()) { > glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, 0); // index, size, > etc etc > glEnableVertexAttribArray(0); // index > glBindAttribLocation(1, 0, "gemAttrib1"); // program, index, > attribute > } > > I use "gemAttrib1" to set the fragColor but it's not working. > > vert file: > > attribute vec4 gemAttrib1; > varying vec4 color1; > > void main() > { > color1 = gemAttrib1; > gl_Position = ftransform(); > } > > frag file: > > varying vec4 color1; > void main() > { > gl_FragColor = color1; > } > > > > On Tue, Aug 26, 2014 at 11:48 PM, j-p <[email protected]> wrote: > >> Had a dummy vec4 using glVertexAttribPointer ready to test before >> realizing there's no way to send the values over to the shader without the >> "program" parameter. Could the right outlet of glsl_program (the one that >> sends out the ID number) work for this? >> >> >> On Mon, Aug 25, 2014 at 11:23 AM, Jack <[email protected]> wrote: >> >>> Would be very nice ! >>> ++ >>> >>> Jack >>> >>> >>> >>> Le 25/08/2014 17:10, IOhannes m zmölnig a écrit : >>> >>> On 08/25/2014 03:49 PM, j-p wrote: >>> >>> I think at some point I'll >>> attempt a mod for gemvertexbuffer to add user-defined attributes that can >>> be passed to the vertex-shader. >>> >>> yes, that would be great. >>> >>> gfmadsr >>> IOhannes >>> >>> >>> >>> >>> _______________________________________________ >>> GEM-dev mailing >>> [email protected]http://lists.puredata.info/listinfo/gem-dev >>> >>> >>> >>> _______________________________________________ >>> GEM-dev mailing list >>> [email protected] >>> http://lists.puredata.info/listinfo/gem-dev >>> >>> >> >
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