63 lines
1.8 KiB
JavaScript
63 lines
1.8 KiB
JavaScript
import { onNextFrame, defaultTimestep } from "./on-next-frame";
|
|
import { createRenderStep } from "./create-render-step";
|
|
const maxElapsed = 40;
|
|
let useDefaultElapsed = true;
|
|
let runNextFrame = false;
|
|
let isProcessing = false;
|
|
const frame = {
|
|
delta: 0,
|
|
timestamp: 0,
|
|
};
|
|
const stepsOrder = [
|
|
"read",
|
|
"update",
|
|
"preRender",
|
|
"render",
|
|
"postRender",
|
|
];
|
|
const steps = stepsOrder.reduce((acc, key) => {
|
|
acc[key] = createRenderStep(() => (runNextFrame = true));
|
|
return acc;
|
|
}, {});
|
|
const sync = stepsOrder.reduce((acc, key) => {
|
|
const step = steps[key];
|
|
acc[key] = (process, keepAlive = false, immediate = false) => {
|
|
if (!runNextFrame)
|
|
startLoop();
|
|
return step.schedule(process, keepAlive, immediate);
|
|
};
|
|
return acc;
|
|
}, {});
|
|
const cancelSync = stepsOrder.reduce((acc, key) => {
|
|
acc[key] = steps[key].cancel;
|
|
return acc;
|
|
}, {});
|
|
const flushSync = stepsOrder.reduce((acc, key) => {
|
|
acc[key] = () => steps[key].process(frame);
|
|
return acc;
|
|
}, {});
|
|
const processStep = (stepId) => steps[stepId].process(frame);
|
|
const processFrame = (timestamp) => {
|
|
runNextFrame = false;
|
|
frame.delta = useDefaultElapsed
|
|
? defaultTimestep
|
|
: Math.max(Math.min(timestamp - frame.timestamp, maxElapsed), 1);
|
|
frame.timestamp = timestamp;
|
|
isProcessing = true;
|
|
stepsOrder.forEach(processStep);
|
|
isProcessing = false;
|
|
if (runNextFrame) {
|
|
useDefaultElapsed = false;
|
|
onNextFrame(processFrame);
|
|
}
|
|
};
|
|
const startLoop = () => {
|
|
runNextFrame = true;
|
|
useDefaultElapsed = true;
|
|
if (!isProcessing)
|
|
onNextFrame(processFrame);
|
|
};
|
|
const getFrameData = () => frame;
|
|
export default sync;
|
|
export { cancelSync, flushSync, getFrameData };
|
|
//# sourceMappingURL=index.js.map
|