| function WebGLAnimation() { | |
| let context = null; | |
| let isAnimating = false; | |
| let animationLoop = null; | |
| let requestId = null; | |
| function onAnimationFrame( time, frame ) { | |
| animationLoop( time, frame ); | |
| requestId = context.requestAnimationFrame( onAnimationFrame ); | |
| } | |
| return { | |
| start: function () { | |
| if ( isAnimating === true ) return; | |
| if ( animationLoop === null ) return; | |
| requestId = context.requestAnimationFrame( onAnimationFrame ); | |
| isAnimating = true; | |
| }, | |
| stop: function () { | |
| context.cancelAnimationFrame( requestId ); | |
| isAnimating = false; | |
| }, | |
| setAnimationLoop: function ( callback ) { | |
| animationLoop = callback; | |
| }, | |
| setContext: function ( value ) { | |
| context = value; | |
| } | |
| }; | |
| } | |
| export { WebGLAnimation }; | |