File size: 767 Bytes
b797337 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 | 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 };
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