added Example.stress4

examples/index.js

@@ -40,6 +40,7 @@ module.exports = {
  stress: require('./stress.js'),
  stress2: require('./stress2.js'),
  stress3: require('./stress3.js'),
+ stress4: require('./stress4.js'),
  svg: require('./svg.js'),
  terrain: require('./terrain.js'),
  timescale: require('./timescale.js'),

examples/stress4.js

@@ -0,0 +1,121 @@
+var Example = Example || {};
+
+Example.stress4 = function() {
+ var Engine = Matter.Engine,
+ Events = Matter.Events,
+ Render = Matter.Render,
+ Runner = Matter.Runner,
+ Composites = Matter.Composites,
+ Common = Matter.Common,
+ MouseConstraint = Matter.MouseConstraint,
+ Mouse = Matter.Mouse,
+ Composite = Matter.Composite,
+ Bodies = Matter.Bodies;
+
+ // create engine
+ var engine = Engine.create({
+ positionIterations: 25,
+ velocityIterations: 35
+ });
+
+ var world = engine.world;
+
+ // create renderer
+ var render = Render.create({
+ element: document.body,
+ engine: engine,
+ options: {
+ width: 800,
+ height: 600,
+ showStats: true,
+ showPerformance: true
+ }
+ });
+
+ Render.run(render);
+
+ // create runner
+ var runner = Runner.create({
+ isFixed: true
+ });
+
+ Runner.run(runner, engine);
+
+ // add bodies
+ var stack = function(scale, columns, rows) {
+ return Composites.stack(40, 40, columns, rows, 0, 0, function(x, y) {
+ var sides = Math.round(Common.random(1, 8));
+
+ switch (Math.round(Common.random(0, 1))) {
+ case 0:
+ if (Common.random() < 0.8) {
+ return Bodies.rectangle(x, y, Common.random(25, 50) * scale, Common.random(25, 50) * scale);
+ } else {
+ return Bodies.rectangle(x, y, Common.random(80, 120) * scale, Common.random(25, 30) * scale);
+ }
+ case 1:
+ return Bodies.polygon(x, y, sides, Common.random(25, 50) * scale);
+ }
+ });
+ };
+
+ Composite.add(world, [
+ stack(0.2, 61, 15), 
+ stack(0.3, 31, 12),
+ Bodies.rectangle(400, 0, 800, 50, { isStatic: true, render: { visible: false } }),
+ Bodies.rectangle(400, 600, 800, 50, { isStatic: true, render: { visible: false } }),
+ Bodies.rectangle(800, 300, 50, 600, { isStatic: true, render: { visible: false } }),
+ Bodies.rectangle(0, 300, 50, 600, { isStatic: true, render: { visible: false } })
+ ]);
+
+ // scene animation
+ engine.timing.timeScale = 0.9;
+ engine.gravity.scale = 0.0007;
+
+ Events.on(engine, 'beforeUpdate', function() {
+ engine.gravity.x = Math.cos(engine.timing.timestamp * 0.0005);
+ engine.gravity.y = Math.sin(engine.timing.timestamp * 0.0005);
+ });
+
+ // add mouse control
+ var mouse = Mouse.create(render.canvas),
+ mouseConstraint = MouseConstraint.create(engine, {
+ mouse: mouse,
+ constraint: {
+ stiffness: 0.2,
+ render: {
+ visible: false
+ }
+ }
+ });
+
+ Composite.add(world, mouseConstraint);
+
+ // keep the mouse in sync with rendering
+ render.mouse = mouse;
+
+ // fit the render viewport to the scene
+ Render.lookAt(render, {
+ min: { x: 0, y: 0 },
+ max: { x: 800, y: 600 }
+ });
+
+ // context for MatterTools.Demo
+ return {
+ engine: engine,
+ runner: runner,
+ render: render,
+ canvas: render.canvas,
+ stop: function() {
+ Matter.Render.stop(render);
+ Matter.Runner.stop(runner);
+ }
+ };
+};
+
+Example.stress4.title = 'Stress 4';
+Example.stress4.for = '>=0.14.2';
+
+if (typeof module !== 'undefined') {
+ module.exports = Example.stress4;
+}