136 lines
3.3 KiB
JavaScript
136 lines
3.3 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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Constraint = Matter.Constraint,
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MouseConstraint = Matter.MouseConstraint;
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Mouse = Matter.Mouse;
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let engine;
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let ground1;
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let constraint1;
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let constraint2;
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let constraint3;
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let poly1A;
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let poly1B;
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let poly2;
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let poly3;
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let canvas;
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function setup() {
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canvas = createCanvas(900, 600);
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// create engine
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engine = Engine.create();
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poly1A = Bodies.polygon(700, 100, 6, 20);
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poly1B = Bodies.polygon(700, 200, 1, 30);
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constraint1 = Constraint.create({
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bodyA: poly1A,
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pointA: {x: 0, y: 0},
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bodyB: poly1B,
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pointB: {x: 0, y: 0},
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stiffness: 0.01
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});
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poly2 = Bodies.polygon(300, 200, 5, 40);
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constraint2 = Constraint.create({
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bodyB: poly2,
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pointA: {x: 150, y: 50},
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pointB: {x: 0, y: 0},
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});
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poly3 = Bodies.polygon(300, 100, 4, 30);
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constraint3 = Constraint.create({
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pointA: {x: 400, y: 120},
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bodyB: poly3,
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pointB: {x: 0, y: 0},
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stiffness: 0.001,
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damping: 0.001
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});
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ground1 = Bodies.rectangle(width/2, height - 20, width, 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, [ground1, poly1A, poly1B, constraint1, poly2, constraint2, poly3, constraint3]);
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let mouse = Mouse.create(canvas.elt);
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let mouseParams = {mouse: mouse};
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let mouseConstraint = MouseConstraint.create(engine, mouseParams);
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mouseConstraint.mouse.pixelRatio = pixelDensity();
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World.add(engine.world, mouseConstraint);
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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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noStroke();
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fill(255);
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drawVertices(ground1.vertices);
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drawVertices(poly1A.vertices);
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drawVertices(poly1B.vertices);
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drawVertices(poly2.vertices);
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drawVertices(poly3.vertices);
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stroke(128);
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strokeWeight(3);
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drawConstraint(constraint1);
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drawConstraint(constraint2);
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drawConstraint(constraint3);
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//generateRect(width / 2, 0);
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//generateEllipse(width/2, -50);
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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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function drawConstraint(constraint) {
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var offsetA = constraint.pointA;
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var posA = {x:0, y:0};
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if (constraint.bodyA) {
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posA = constraint.bodyA.position;
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}
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var offsetB = constraint.pointB;
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var posB = {x:0, y:0};
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if (constraint.bodyB) {
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posB = constraint.bodyB.position;
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}
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line(
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posA.x + offsetA.x,
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posA.y + offsetA.y,
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posB.x + offsetB.x,
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posB.y + offsetB.y
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);
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} |