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more sdf perf

This commit is contained in:
“chrisshank” 2024-12-01 20:28:26 -08:00
parent 5eb4f5c432
commit 48b7119e37
2 changed files with 15 additions and 14 deletions
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24
demo/distance-perf.html
View File

@ -41,8 +41,8 @@
for (let i = 0; i < 20; i++) {
for (let j = 0; j < 20; j++) {
const geo = document.createElement('fc-geometry');
geo.x = 50 * i + Math.floor(Math.random() * 45);
geo.y = 50 * j + Math.floor(Math.random() * 45);
geo.x = 100 * i + Math.floor(Math.random() * 45);
geo.y = 100 * j + Math.floor(Math.random() * 45);
geo.width = geo.height = 45;
geometries.push(geo);
d.append(geo);
@ -52,18 +52,18 @@
DistanceField.define();
// function tick() {
// window.requestAnimationFrame(tick);
function tick() {
window.requestAnimationFrame(tick);
// for (let i = 0; i < 10; i++) {
// const g = geometries[Math.floor(Math.random() * geometries.length)];
// const max = 15;
// g.x += Math.floor(Math.random() * max - max / 2);
// g.y += Math.floor(Math.random() * max - max / 2);
// }
// }
for (let i = 0; i < 10; i++) {
const g = geometries[Math.floor(Math.random() * geometries.length)];
const max = 50;
g.x += Math.floor(Math.random() * max - max / 2);
g.y += Math.floor(Math.random() * max - max / 2);
}
}
// tick();
tick();
</script>
</body>
</html>

5
src/distance-field.ts
View File

@ -153,12 +153,13 @@ export class DistanceField extends HTMLElement {
const gl = this.glContext;
const positions: number[] = [];
const windowWidth = window.innerWidth;
const windowHeight = window.innerHeight;
// Collect positions and assign unique IDs to all shapes
this.shapes.forEach((geometry, index) => {
const rect = geometry.getClientRect();
const windowWidth = window.innerWidth;
const windowHeight = window.innerHeight;
// Convert DOM coordinates to Normalized Device Coordinates (NDC)
const x1 = (rect.left / windowWidth) * 2 - 1;
const y1 = -((rect.top / windowHeight) * 2 - 1);