Triangle demo:

The "Hello World" of WebGL, I guess. Key concepts:

• Get WebGL context from a HTML canvas element (in initWebGL())
• Load vertex and fragment shader GLSL source code as strings (in loadAssets())
• Compile shaders (in createShaders()) and then link the shaders into a program (in createProgram())
• Create a simple model with three vertices
• Create an array buffer for the vertices (in initArrayBuffer())
• Draw the triangle (in drawScene())