andras/sdf-2d-demo
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Optimize scene change

Browse source
This commit is contained in:
schmelczerandras 2020-10-01 11:26:23 +02:00
parent 41f9a2b5cf
commit ee29365824
3 changed files with 15 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

20
src/index.ts
View file

@ -42,10 +42,10 @@ const handleTextToggle = () => {
toggleButton.addEventListener('click', handleTextToggle);
handleTextToggle();
const handleScene = async (SceneConstructor: new () => Scene) => {
const scene = new SceneConstructor();
await scene.initialize(canvas, overlay);
const handleScene = async (
currentScene: Scene,
NextSceneConstructor: new () => Scene
): Promise<Scene> => {
let triggerIsOver: () => void;
const isOver = new Promise((resolve) => (triggerIsOver = resolve));
let timeSinceStart = 0;
@ -53,7 +53,7 @@ const handleScene = async (SceneConstructor: new () => Scene) => {
const handleFrame = (currentTime: DOMHighResTimeStamp) => {
const deltaTime = deltaTimeCalculator.getNextDeltaTime(currentTime);
scene.drawNextFrame(currentTime, deltaTime);
currentScene.drawNextFrame(currentTime, deltaTime);
if ((timeSinceStart += deltaTime) > sceneIntervalInSeconds * 1000) {
triggerIsOver();
@ -63,15 +63,21 @@ const handleScene = async (SceneConstructor: new () => Scene) => {
};
requestAnimationFrame(handleFrame);
const nextScene = new NextSceneConstructor();
await nextScene.initialize(canvas, overlay);
await isOver;
scene.destroy();
currentScene.destroy();
return nextScene;
};
const main = async () => {
try {
let i = 0;
let currentScene: Scene = new scenes[i++]();
await currentScene.initialize(canvas, overlay);
for (;;) {
await handleScene(scenes[i++ % scenes.length]);
currentScene = await handleScene(currentScene, scenes[i++ % scenes.length]);
}
} catch (e) {
console.error(e);