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Lua Game Development Cookbook by Mário Kašuba

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Drawing primitives using vertex buffers

VBO was, in the past, a part of an OpenGL as an extension. With the new OpenGL specification, the VBO mechanism is included in the GLSL specification. This means that you can reuse much of the existing functionality with small changes. VBOs present an opaque storage for data; therefore, they might contain the vertex positions, texture coordinates, colors or any other data. GLSL shaders can use these buffers but they must be differentiated so the shader program knows what data is stored inside of these buffers. That's where the vertex array objects or VAO come in. The vertex array object is a structure that merges VBOs for use in the shader program. They are used in GLSL shader programs as a main source of ...

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