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POglVertexAttrib4f not working in OS X, but works fine in iOS?
 

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  1. POglVertexAttrib4f not working in OS X, but works fine in iOS?
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    <p>I'm trying to port a simple OpenGL ES 2.0 renderer I made for iOS to OS X desktop and I'm running into into a 'nothing rendering' problem, and I don't get any errors reported so I'm at a loss what to do. So far I've narrowed the problem down to a call I make to <code>glVertexAttrib4f</code>, which is only working in OS X. Can anyone take a look at the following code and see why the call to <code>glVertexAttrib4f</code> doesn't work on desktop?:</p> <pre><code>void Renderer::drawTest() { gl::clear( mBackgroundColor ); static Vec2f vertices[3] = { Vec2f( 0, 0 ), Vec2f( 0.5, 1 ), Vec2f( 1, 0 ) }; static int indices[3] = { 0, 1, 2 }; mShader.bind(); glEnableVertexAttribArray( mAttributes.position ); glVertexAttribPointer( mAttributes.position, 2, GL_FLOAT, GL_FALSE, 0, &amp;vertices[0] ); #ifdef USING_GENERIC_ARRAY_POINTER // works in iOS /w ES2 and OSX: static Color colors[3] = { Color( 0, 0, 1 ), Color( 0, 0, 1 ), Color( 0, 0, 1 ) }; glEnableVertexAttribArray( mAttributes.color ); glVertexAttribPointer( mAttributes.color, 3, GL_FLOAT, GL_FALSE, 0, &amp;colors[0] ); #else // using generic attribute // works in iOS, but doesn't work in OSX ?: glVertexAttrib4f( mAttributes.color, 0, 1, 1, 1 ); #endif glDrawElements( GL_TRIANGLES, 3, GL_UNSIGNED_INT, &amp;indices[0] ); errorCheck(); // calls glGetError, which always returns GL_NO_ERROR } </code></pre> <p>note: this is example code that I stripped out of something much more complex, please forgive me for not making it more complete.</p> <p>versions: desktop OS X is 2.1 ATI-7.18.18 iPhone simulator is OpenGL ES 2.0 APPLE</p>
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      1. POglVertexAttrib4f not working in OS X, but works fine in iOS?
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    1. CODefine "works". What exactly is it that this function is supposed to do? Do you remove the color array when you try to call `glVertexAttrib4f`?
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      1. USNicol Bolas
    2. COBy works I mean it shows a triangle in the upper right corner of the screen, in both iOS and OS X. Yes, I am only doing the `glVertexAttribPointer` method or `glVertexAttrib4f` method, not both. I'll try to edit the code so it is more clear
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