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three.js
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		<h1>Buffer Attribute Usage Constants</h1>

		<p>
			The usage constants can be used to provide a hint to the API regarding how
			the geometry buffer attribute will be used in order to optimize
			performance.
		</p>

		<h2>Code Example</h2>

		<code>
		const geometry = new THREE.BufferGeometry();
		const positionAttribute = new THREE.BufferAttribute( array, 3 , false );
		positionAttribute.setUsage( THREE.DynamicDrawUsage );
		geometry.setAttribute( 'position', positionAttribute );
		</code>

		<h2>Examples</h2>
		<p>[example:webgl_buffergeometry_drawrange materials / buffergeometry / drawrange ]</p>

		<h2>Geometry Usage</h2>
		<code>
		THREE.StaticDrawUsage 
		THREE.DynamicDrawUsage 
		THREE.StreamDrawUsage
				
		THREE.StaticReadUsage 
		THREE.DynamicReadUsage 
		THREE.StreamReadUsage
				
		THREE.StaticCopyUsage 
		THREE.DynamicCopyUsage 
		THREE.StreamCopyUsage
		</code>

		For more detailed information on each of these constants see
		[link:https://www.khronos.org/opengl/wiki/Buffer_Object#Buffer_Object_Usage this OpenGL documentation].

		<h2>Source</h2>

		<p>
			[link:https://github.com/mrdoob/three.js/blob/master/src/constants.js src/constants.js]
		</p>
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