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8963598
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2012-01-22T18:43:30.680
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2012-01-22T18:43:30.680
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If you really want to stick with the newest OpenGL API, where lots of features where removed in favor of a programmable pipeline (OpenGL 4 and OpenGL ES 2), you will have to write the vertex and fragment shaders yourself, and implement the transformation stuff there. You will have to manually create all the attributes you use in the shader, specifically the coords and texture coords you use in your example. You will also need 2 uniform variables, one for model-view matrix and other for projection matrix, if you want to mimic the behavior of old fixed functionality OpenGL. The rotation/translation you are used to do are matrix operations. During vertex transformation stage of the pipeline, now performed by the vertex shader you supply, you must multiply a 4x4 transformation matrix by the vertex position (4 coordinates, interpreted as a 4x1 matrix, where the 4th coordinate is usually 1 if you are not doing anything too fancy). There resulting vector will be at the correct relative position according to the that transformation. Then you multiply the projection matrix to that vector, and the output the result to the fragment shader. You can learn how all those matrices are built by looking at the documentation of <code>glRotate</code>, <code>glTranslate</code> and <code>gluPerspective</code>. Remember matrix multiplication is non-comutative, so the order you multiply them matters (this is exactly why the order you call <code>glRotate</code> and <code>glTranslate</code> also matters). About learning GLSL and how to use shaders, I've learned on <a href="http://www.lighthouse3d.com/opengl/glsl/" rel="nofollow">here</a>, but these tutorials relates to OpenGL 1.4 and 2 and are now very old. The main difference is that the predefined input variables to the vertex shaders, such as <code>gl_Vertex</code> and <code>gl_ModelViewMatrix</code> no longer exists, and you have to create them by yourself.
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1. POOpenGL first person camera rotation and translation
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1. USlvella
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