chore: new particles example

Author: lajbel

examples/particle.js

@@ -0,0 +1,49 @@
+// Creating particles using Particle Component
+
+kaplay();
+
+loadSprite("star", "./examples/sprites/particle_star_filled.png");
+
+onLoad(() => {
+    go("game")
+});
+
+function woah() {
+    const parts = add([
+        pos(center()),
+        particles({
+            max: 20,
+            speed: [50, 100],
+            angle: [0, 360],
+            angularVelocity: [45, 90],
+            lifeTime: [1.0, 1.5],
+            colors: [rgb(128, 128, 255), WHITE],
+            opacities: [0.1, 1.0, 0.0],
+            scales: [1, 2, 1],
+            texture: getSprite("star").data.tex,
+            quads: [getSprite("star").data.frames[0]],
+        }, {
+            lifetime: 1.5,
+            rate: 0,
+            direction: -90,
+            spread: 40,
+        }),
+    ]);
+
+    parts.emit(20);
+}
+
+scene("game", () => {
+    onKeyPress("space", () => {
+        woah();
+    });
+
+    onMousePress(() => {
+        woah();
+    });
+
+    add([
+        text("press space for particles"),
+    ]);
+});
+