Billboarding is techniques that allows quads (when textured theyare also called sprites) to always face the camera. Write code toimplement billboarding for a quad that is in the X Y plane and isfacing the camera at all times. Implement the camera to be anorthographic camera. To demonstrate this rotate the camera aroundthe Y axis and the quad should still be facing the camera. You donot need to write the .html portion only the .js. The uniformvariables that the vertex shader takes is the modelview and theprojection matrices. The attribute it takes is the vertex position.The fragment shader colors the quad
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