122 lines
3.0 KiB
JavaScript
122 lines
3.0 KiB
JavaScript
let Engine = Matter.Engine,
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Render = Matter.Render,
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World = Matter.World,
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Bodies = Matter.Bodies,
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Body = Matter.Body;
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let engine;
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let box1;
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let box2;
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let ground1;
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let ground2;
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let ground3;
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let circle, polygon;
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let boxes = [];
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let circles = [];
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let colorBoxes = [];
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let colorCircles = [];
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let angle = 0;
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let angleSpeed = 0.02;
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let propeller;
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function setup() {
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createCanvas(900, 600);
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// create engine
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engine = Engine.create();
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box1 = Bodies.rectangle(200, 200, 80, 80, {
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restitution: 0.8,
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friction: 0.5,
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});
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propeller = Bodies.rectangle(width/2, height/2, 300, 15, {isStatic: true});
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ground1 = Bodies.rectangle(200, 450, 200, 10, {
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isStatic: true
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});
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ground2 = Bodies.rectangle(500, 500, 200, 10, {
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isStatic: true
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});
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ground3 = Bodies.rectangle(850, 450, 200, 10, {
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isStatic: true
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});
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// add bodies to world
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World.add(engine.world, [box1, ground1, ground2, ground3, propeller]);
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}
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function draw() {
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background(0);
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Engine.update(engine);
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fill(50, 150, 50);
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drawVertices(ground1.vertices);
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drawVertices(ground2.vertices);
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drawVertices(ground3.vertices);
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drawVertices(propeller.vertices);
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Body.setAngle(propeller, angle += angleSpeed);
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Body.setAngularVelocity(propeller, angleSpeed);
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generateRect(width / 2, 0);
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generateEllipse(width/2, -50);
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for (let i = 0; i < boxes.length; i++) {
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fill(colorBoxes[i]);
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drawVertices(boxes[i].vertices);
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if (isOffScreen(boxes[i])) {
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World.remove(engine.world, boxes[i]);
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boxes.splice(i, 1);
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colorBoxes.splice(i, 1);
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i--;
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}
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}
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for (let i = 0; i < circles.length; i++) {
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fill(colorCircles[i]);
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drawVertices(circles[i].vertices);
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if (isOffScreen(circles[i])) {
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World.remove(engine.world, circles[i]);
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circles.splice(i, 1);
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colorCircles.splice(i, 1);
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i--;
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}
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}
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console.log("Boxes: " + boxes.length);
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console.log("Circles: " + circles.length);
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console.log("Engine bodies: " + engine.world.bodies.length);
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}
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function isOffScreen(body) {
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let pos = body.position;
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return pos.y > height || pos.x < 0 || pos.x > width;
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}
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function generateRect(x, y) {
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let b = Bodies.rectangle(x, y, random(10, 30), random(10, 30), {
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restitution: 1.2,
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friction: 0.5,
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});
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Matter.Body.setMass(b, 1);
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boxes.push(b);
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World.add(engine.world, [b]);
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colorBoxes.push("rgba(" + Math.trunc(random(100, 250)).toString() + "," + Math.trunc(random(100, 250)).toString() + "," + Math.trunc(random(100, 250)).toString() + ", 0.5)");
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}
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function generateEllipse(x, y) {
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let b = Bodies.circle(x, y, random(10, 30), {
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restitution: 1.2,
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friction: 0.5,
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});
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Matter.Body.setMass(b, 1);
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circles.push(b);
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World.add(engine.world, [b]);
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colorCircles.push("rgba(" + Math.trunc(random(100, 250)).toString() + "," + Math.trunc(random(100, 250)).toString() + "," + Math.trunc(random(100, 250)).toString() + ", 0.5)");
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}
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function drawVertices(vertices) {
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beginShape();
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for (let i = 0; i < vertices.length; i++) {
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vertex(vertices[i].x, vertices[i].y);
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}
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endShape();
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}
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