How to use PShader.bind / PShader.unbind ?

Core Library Questions

fouchtre

How to use PShader.bind / PShader.unbind ?

in Core Library Questions • 10 months ago

Hello !

Someone know what the functions PShader.bind and PShader.unbind are supposed to do ?

I don't know at all... All works fine if I don't use it, and if I do nothing changed... I probably don't use it as expected...

Thanks !

Replies(3)

andres

Re: How to use PShader.bind / PShader.unbind ?

10 months ago

You don't normally need to use bin/unbind methods in PShader, since Processing takes care of doing that automatically. But if you are calling low-level OpenGL functions, then bind/unbind become useful, take a look at the LowLevelGL example included in Topics|Shaders in 2.0b6

fouchtre

Re: How to use PShader.bind / PShader.unbind ?

10 months ago

Hello Andres !

Thank you for your message !

I'm using custom attributes, then I need to use openGl function to enable and define the FloatBuffers.

Something like that

pgl = beginPGL();
scaleLoc = pgl.getAttribLocation(testShader.glProgram, "inScale");
pgl.enableVertexAttribArray(scaleLoc);
pgl.vertexAttribPointer(scaleLoc, 3, PGL.FLOAT, false, 0, scaleData);

Do I have to use bind before 'beginPGL()' and unbind after 'endPGL()' ?

I checked your blog a lot of time...

Thanks a lot for your work (and your help) !

andres

Re: How to use PShader.bind / PShader.unbind ?

10 months ago

You should bind after beginPGL() and unbind before endPGL().

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