Tuesday, 4 November 2014

Drawing with Modern OpenGL

The following video demonstrate how modern OpenGL uses Vertex Array Objects to store buffers and generic vertex attributes together for faster drawing.

The first Video shows how the deprecated immediate mode OpenGL version would work as context for why we use Modern OpenGL.

The next videos show the basic framework code using ngl and a simple colour shader. The first demo will then use OpenGL calls to create and display a series of points. The second uses the ngl::VertexArrayObject class to do the same thing. The source code can be found here and suggested man pages are glGenVertexArrays glBindVertexArray glGenBuffers glBufferData glVertexAttribPointer glDrawArrays

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