three.js/examples/js/animation/AnimationClipCreator.js

( function () {

	var AnimationClipCreator = function () {};

	AnimationClipCreator.CreateRotationAnimation = function ( period, axis ) {

		var times = [ 0, period ],
			values = [ 0, 360 ];
		axis = axis || 'x';
		var trackName = '.rotation[' + axis + ']';
		var track = new THREE.NumberKeyframeTrack( trackName, times, values );
		return new THREE.AnimationClip( null, period, [ track ] );

	};

	AnimationClipCreator.CreateScaleAxisAnimation = function ( period, axis ) {

		var times = [ 0, period ],
			values = [ 0, 1 ];
		axis = axis || 'x';
		var trackName = '.scale[' + axis + ']';
		var track = new THREE.NumberKeyframeTrack( trackName, times, values );
		return new THREE.AnimationClip( null, period, [ track ] );

	};

	AnimationClipCreator.CreateShakeAnimation = function ( duration, shakeScale ) {

		var times = [],
			values = [],
			tmp = new THREE.Vector3();

		for ( var i = 0; i < duration * 10; i ++ ) {

			times.push( i / 10 );
			tmp.set( Math.random() * 2.0 - 1.0, Math.random() * 2.0 - 1.0, Math.random() * 2.0 - 1.0 ).multiply( shakeScale ).toArray( values, values.length );

		}

		var trackName = '.position';
		var track = new THREE.VectorKeyframeTrack( trackName, times, values );
		return new THREE.AnimationClip( null, duration, [ track ] );

	};

	AnimationClipCreator.CreatePulsationAnimation = function ( duration, pulseScale ) {

		var times = [],
			values = [],
			tmp = new THREE.Vector3();

		for ( var i = 0; i < duration * 10; i ++ ) {

			times.push( i / 10 );
			var scaleFactor = Math.random() * pulseScale;
			tmp.set( scaleFactor, scaleFactor, scaleFactor ).toArray( values, values.length );

		}

		var trackName = '.scale';
		var track = new THREE.VectorKeyframeTrack( trackName, times, values );
		return new THREE.AnimationClip( null, duration, [ track ] );

	};

	AnimationClipCreator.CreateVisibilityAnimation = function ( duration ) {

		var times = [ 0, duration / 2, duration ],
			values = [ true, false, true ];
		var trackName = '.visible';
		var track = new THREE.BooleanKeyframeTrack( trackName, times, values );
		return new THREE.AnimationClip( null, duration, [ track ] );

	};

	AnimationClipCreator.CreateMaterialColorAnimation = function ( duration, colors ) {

		var times = [],
			values = [],
			timeStep = duration / colors.length;

		for ( var i = 0; i <= colors.length; i ++ ) {

			times.push( i * timeStep );
			values.push( colors[ i % colors.length ] );

		}

		var trackName = '.material[0].color';
		var track = new THREE.ColorKeyframeTrack( trackName, times, values );
		return new THREE.AnimationClip( null, duration, [ track ] );

	};

	THREE.AnimationClipCreator = AnimationClipCreator;

} )();