just another GLSL vertex attributes related question

category: code [glöplog]

I go like

Code:


glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(float)*6, (void*)0);
glEnableVertexAttribArray(0);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(float)*6, (void*)3);
glEnableVertexAttribArray(1);

Yeah I know I should align things.

then I get all

Code:


unsigned sp = glCreateProgram();
/* attach shaders and that */
glBindAttribLocation(sp, 0, "ATTRIB_A");
glBindAttribLocation(sp, 1, "ATTRIB_B");
glLinkProgram(sp);

and it doesn't work.

when I

Code:


glVertexAttribPointer(glGetAttribLocation(sp, "ATTRIB_A"), 3, GL_FLOAT, GL_FALSE, sizeof(float)*6, (void*)0);
glVertexAttribPointer(glGetAttribLocation(sp, "ATTRIB_B"), 3, GL_FLOAT, GL_FALSE, sizeof(float)*6, (void*)3);

It works, and binding then getting doesn't work. What am I missing?

added on the 2010-07-15 06:23:26 by xernobyl

I want the glBindAttribLocation way of doing it and it's not working. From my interpretation of the OpenGL 3.2 specification it should work. Ideas?

added on the 2010-07-15 06:31:35 by xernobyl

If nothing else, I'm pretty sure you want the pointer parameter to be a multiple of sizeof(float)?

Like:

Code:


glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(float)*6, (void*)(sizeof(float) * 3));

added on the 2010-07-15 08:58:54 by leblane

/facepalm

OK. Thank you.

added on the 2010-07-15 14:48:33 by xernobyl

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just another GLSL vertex attributes related question

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