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liabru-matter-js/examples/bridge.js
2019-09-14 18:54:50 +01:00

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3.2 KiB
JavaScript

var Example = Example || {};
Example.bridge = function() {
var Engine = Matter.Engine,
Render = Matter.Render,
Runner = Matter.Runner,
Body = Matter.Body,
Composites = Matter.Composites,
Common = Matter.Common,
Constraint = Matter.Constraint,
MouseConstraint = Matter.MouseConstraint,
Mouse = Matter.Mouse,
World = Matter.World,
Bodies = Matter.Bodies;
// create engine
var engine = Engine.create(),
world = engine.world;
// create renderer
var render = Render.create({
element: document.body,
engine: engine,
options: {
width: 800,
height: 600,
showAngleIndicator: true
}
});
Render.run(render);
// create runner
var runner = Runner.create();
Runner.run(runner, engine);
// add bodies
var group = Body.nextGroup(true);
var bridge = Composites.stack(160, 290, 15, 1, 0, 0, function(x, y) {
return Bodies.rectangle(x - 20, y, 53, 20, {
collisionFilter: { group: group },
chamfer: 5,
density: 0.005,
frictionAir: 0.05,
render: {
fillStyle: '#575375'
}
});
});
Composites.chain(bridge, 0.3, 0, -0.3, 0, {
stiffness: 1,
length: 0,
render: {
visible: false
}
});
var stack = Composites.stack(250, 50, 6, 3, 0, 0, function(x, y) {
return Bodies.rectangle(x, y, 50, 50, Common.random(20, 40));
});
World.add(world, [
bridge,
stack,
Bodies.rectangle(30, 490, 220, 380, {
isStatic: true,
chamfer: { radius: 20 }
}),
Bodies.rectangle(770, 490, 220, 380, {
isStatic: true,
chamfer: { radius: 20 }
}),
Constraint.create({
pointA: { x: 140, y: 300 },
bodyB: bridge.bodies[0],
pointB: { x: -25, y: 0 },
length: 2,
stiffness: 0.9
}),
Constraint.create({
pointA: { x: 660, y: 300 },
bodyB: bridge.bodies[bridge.bodies.length - 1],
pointB: { x: 25, y: 0 },
length: 2,
stiffness: 0.9
})
]);
// add mouse control
var mouse = Mouse.create(render.canvas),
mouseConstraint = MouseConstraint.create(engine, {
mouse: mouse,
constraint: {
stiffness: 0.1,
render: {
visible: false
}
}
});
World.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);
}
};
};
if (typeof module !== 'undefined' && module.exports) {
module.exports = Example[Object.keys(Example)[0]];
}