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liabru-matter-js/demo/js/Demo.js
2014-02-19 14:15:05 +00:00

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18 KiB
JavaScript

(function() {
// Matter aliases
var Engine = Matter.Engine,
Gui = Matter.Gui,
World = Matter.World,
Bodies = Matter.Bodies,
Body = Matter.Body,
Composite = Matter.Composite,
Composites = Matter.Composites,
Common = Matter.Common,
Constraint = Matter.Constraint;
var Demo = {};
var _engine,
_gui,
_sceneName;
Demo.init = function() {
var container = document.getElementById('canvas-container');
// engine options - these are the defaults
var options = {
positionIterations: 6,
velocityIterations: 4,
enableSleeping: false,
timeScale: 1
};
// create a Matter engine, with the element to insert the canvas into
// NOTE: this is actually Matter.Engine.create(), see the aliases at top of this file
_engine = Engine.create(container, options);
// run the engine
Engine.run(_engine);
// default scene function name
_sceneName = 'mixed';
// get the scene function name from hash
if (window.location.hash.length !== 0)
_sceneName = window.location.hash.replace('#', '');
// set up a scene with bodies
Demo[_sceneName]();
// set up demo interface
Demo.initControls();
};
if (window.addEventListener) {
window.addEventListener('load', Demo.init);
} else if (window.attachEvent) {
window.attachEvent('load', Demo.init);
}
Demo.initControls = function() {
var demoSelect = document.getElementById('demo-select'),
demoReset = document.getElementById('demo-reset');
// create a dat.gui using Matter helper
_gui = Gui.create(_engine);
demoSelect.value = _sceneName;
demoSelect.addEventListener('change', function(e) {
Demo[_sceneName = e.target.value]();
Gui.update(_gui);
var scrollY = window.scrollY;
window.location.hash = _sceneName;
window.scrollY = scrollY;
});
demoReset.addEventListener('click', function(e) {
Demo[_sceneName]();
Gui.update(_gui);
});
};
Demo.reset = function() {
var _world = _engine.world;
World.clear(_world);
Engine.clear(_engine);
_engine.enableSleeping = false;
_engine.world.gravity.y = 1;
var offset = 5;
World.addBody(_world, Bodies.rectangle(400, -offset, 800.5 + 2 * offset, 50.5, { isStatic: true }));
World.addBody(_world, Bodies.rectangle(400, 600 + offset, 800.5 + 2 * offset, 50.5, { isStatic: true }));
World.addBody(_world, Bodies.rectangle(800 + offset, 300, 50.5, 600.5 + 2 * offset, { isStatic: true }));
World.addBody(_world, Bodies.rectangle(-offset, 300, 50.5, 600.5 + 2 * offset, { isStatic: true }));
var renderOptions = _engine.render.options;
renderOptions.wireframes = true;
renderOptions.showDebug = false;
renderOptions.showBroadphase = false;
renderOptions.showBounds = false;
renderOptions.showVelocity = false;
renderOptions.showCollisions = false;
renderOptions.showAxes = false;
renderOptions.showPositions = false;
renderOptions.showAngleIndicator = true;
renderOptions.showIds = false;
renderOptions.showShadows = false;
};
// all functions below are for setting up scenes
Demo.mixed = function() {
var _world = _engine.world;
Demo.reset();
var stack = Composites.stack(20, 20, 20, 5, 0, 0, function(x, y, column, row) {
switch (Math.round(Common.random(0, 1))) {
case 0:
if (Math.random() < 0.8) {
return Bodies.rectangle(x, y, Common.random(20, 50), Common.random(20, 50));
} else {
return Bodies.rectangle(x, y, Common.random(80, 120), Common.random(20, 30));
}
case 1:
return Bodies.polygon(x, y, Math.round(Common.random(1, 8)), Common.random(20, 50));
}
});
World.addComposite(_world, stack);
var renderOptions = _engine.render.options;
};
Demo.mixedSolid = function() {
var _world = _engine.world;
Demo.reset();
var stack = Composites.stack(50, 50, 12, 3, 0, 0, function(x, y, column, row) {
switch (Math.round(Common.random(0, 1))) {
case 0:
if (Math.random() < 0.8) {
return Bodies.rectangle(x, y, Common.random(20, 50), Common.random(20, 50));
} else {
return Bodies.rectangle(x, y, Common.random(80, 120), Common.random(20, 30));
}
case 1:
return Bodies.polygon(x, y, Math.round(Common.random(1, 8)), Common.random(20, 50));
}
});
World.addComposite(_world, stack);
var renderOptions = _engine.render.options;
renderOptions.wireframes = false;
renderOptions.showAngleIndicator = false;
renderOptions.showShadows = true;
};
Demo.chains = function() {
var _world = _engine.world;
Demo.reset();
var groupId = Body.nextGroupId();
var ropeA = Composites.stack(200, 100, 5, 2, 10, 10, function(x, y, column, row) {
return Bodies.rectangle(x, y, 50, 20, { groupId: groupId });
});
Composites.chain(ropeA, 0.5, 0, -0.5, 0, { stiffness: 0.8, length: 2 });
Composite.addConstraint(ropeA, Constraint.create({
bodyB: ropeA.bodies[0],
pointB: { x: -25, y: 0 },
pointA: { x: 200, y: 100 },
stiffness: 0.5
}));
World.addComposite(_world, ropeA);
groupId = Body.nextGroupId();
var ropeB = Composites.stack(500, 100, 5, 2, 10, 10, function(x, y, column, row) {
return Bodies.circle(x, y, 20, { groupId: groupId });
});
Composites.chain(ropeB, 0.5, 0, -0.5, 0, { stiffness: 0.8, length: 2 });
Composite.addConstraint(ropeB, Constraint.create({
bodyB: ropeB.bodies[0],
pointB: { x: -20, y: 0 },
pointA: { x: 500, y: 100 },
stiffness: 0.5
}));
World.addComposite(_world, ropeB);
};
Demo.car = function() {
var _world = _engine.world;
Demo.reset();
var scale;
scale = 0.8;
World.addComposite(_world, Composites.car(150, 100, 100 * scale, 40 * scale, 30 * scale));
scale = 0.7;
World.addComposite(_world, Composites.car(350, 300, 100 * scale, 40 * scale, 30 * scale));
World.addBody(_world, Bodies.rectangle(200, 150, 700, 20, { isStatic: true, angle: Math.PI * 0.06 }));
World.addBody(_world, Bodies.rectangle(500, 350, 700, 20, { isStatic: true, angle: -Math.PI * 0.06 }));
World.addBody(_world, Bodies.rectangle(340, 580, 700, 20, { isStatic: true, angle: Math.PI * 0.04 }));
var renderOptions = _engine.render.options;
renderOptions.showAngleIndicator = true;
renderOptions.showCollisions = true;
};
Demo.friction = function() {
var _world = _engine.world;
Demo.reset();
World.addBody(_world, Bodies.rectangle(300, 180, 700, 20, { isStatic: true, angle: Math.PI * 0.06 }));
World.addBody(_world, Bodies.rectangle(300, 70, 40, 40, { friction: 0.001 }));
World.addBody(_world, Bodies.rectangle(300, 350, 700, 20, { isStatic: true, angle: Math.PI * 0.06 }));
World.addBody(_world, Bodies.rectangle(300, 250, 40, 40, { friction: 0.0005 }));
World.addBody(_world, Bodies.rectangle(300, 520, 700, 20, { isStatic: true, angle: Math.PI * 0.06 }));
World.addBody(_world, Bodies.rectangle(300, 430, 40, 40, { friction: 0 }));
var renderOptions = _engine.render.options;
renderOptions.showAngleIndicator = true;
renderOptions.showCollisions = true;
};
Demo.airFriction = function() {
var _world = _engine.world;
Demo.reset();
World.addBody(_world, Bodies.rectangle(200, 100, 60, 60, { frictionAir: 0.001 }));
World.addBody(_world, Bodies.rectangle(400, 100, 60, 60, { frictionAir: 0.05 }));
World.addBody(_world, Bodies.rectangle(600, 100, 60, 60, { frictionAir: 0.1 }));
var renderOptions = _engine.render.options;
renderOptions.showAngleIndicator = true;
renderOptions.showCollisions = true;
};
Demo.sleeping = function() {
var _world = _engine.world;
Demo.reset();
var stack = Composites.stack(50, 50, 12, 3, 0, 0, function(x, y, column, row) {
switch (Math.round(Common.random(0, 1))) {
case 0:
if (Math.random() < 0.8) {
return Bodies.rectangle(x, y, Common.random(20, 50), Common.random(20, 50));
} else {
return Bodies.rectangle(x, y, Common.random(80, 120), Common.random(20, 30));
}
case 1:
return Bodies.polygon(x, y, Math.round(Common.random(1, 8)), Common.random(20, 50));
}
});
World.addComposite(_world, stack);
_engine.enableSleeping = true;
var renderOptions = _engine.render.options;
};
Demo.broadphase = function() {
var _world = _engine.world;
Demo.reset();
var stack = Composites.stack(20, 20, 20, 5, 0, 0, function(x, y, column, row) {
switch (Math.round(Common.random(0, 1))) {
case 0:
if (Math.random() < 0.8) {
return Bodies.rectangle(x, y, Common.random(20, 50), Common.random(20, 50));
} else {
return Bodies.rectangle(x, y, Common.random(80, 120), Common.random(20, 30));
}
case 1:
return Bodies.polygon(x, y, Math.round(Common.random(1, 8)), Common.random(20, 50));
}
});
World.addComposite(_world, stack);
var renderOptions = _engine.render.options;
renderOptions.showBroadphase = true;
};
Demo.gravity = function() {
var _world = _engine.world;
Demo.reset();
_engine.world.gravity.y = -1;
var stack = Composites.stack(20, 20, 20, 5, 0, 0, function(x, y, column, row) {
switch (Math.round(Common.random(0, 1))) {
case 0:
if (Math.random() < 0.8) {
return Bodies.rectangle(x, y, Common.random(20, 50), Common.random(20, 50));
} else {
return Bodies.rectangle(x, y, Common.random(80, 120), Common.random(20, 30));
}
case 1:
return Bodies.polygon(x, y, Math.round(Common.random(1, 8)), Common.random(20, 50));
}
});
World.addComposite(_world, stack);
var renderOptions = _engine.render.options;
};
Demo.avalanche = function() {
var _world = _engine.world;
Demo.reset();
var stack = Composites.stack(20, 20, 20, 5, 0, 0, function(x, y, column, row) {
return Bodies.circle(x, y, Common.random(10, 20), { friction: 0.00001, restitution: 0.5, density: 0.1 });
});
World.addComposite(_world, stack);
World.addBody(_world, Bodies.rectangle(200, 150, 700, 20, { isStatic: true, angle: Math.PI * 0.06 }));
World.addBody(_world, Bodies.rectangle(500, 350, 700, 20, { isStatic: true, angle: -Math.PI * 0.06 }));
World.addBody(_world, Bodies.rectangle(340, 580, 700, 20, { isStatic: true, angle: Math.PI * 0.04 }));
};
Demo.newtonsCradle = function() {
var _world = _engine.world;
Demo.reset();
var cradle = Composites.newtonsCradle(300, 100, 5, 30, 200);
World.addComposite(_world, cradle);
Body.translate(cradle.bodies[0], { x: -180, y: -100 });
cradle = Composites.newtonsCradle(250, 400, 7, 20, 140);
World.addComposite(_world, cradle);
Body.translate(cradle.bodies[0], { x: -140, y: -100 });
var renderOptions = _engine.render.options;
renderOptions.showVelocity = true;
renderOptions.showAngleIndicator = false;
};
Demo.stack = function() {
var _world = _engine.world;
Demo.reset();
var stack = Composites.stack(100, 100, 10, 5, 0, 0, function(x, y, column, row) {
return Bodies.rectangle(x, y, 40, 40);
});
World.addComposite(_world, stack);
var renderOptions = _engine.render.options;
};
Demo.circleStack = function() {
var _world = _engine.world;
Demo.reset();
var stack = Composites.stack(100, 100, 10, 10, 20, 0, function(x, y, column, row) {
return Bodies.circle(x, y, 20);
});
World.addComposite(_world, stack);
var renderOptions = _engine.render.options;
};
Demo.wreckingBall = function() {
var _world = _engine.world;
Demo.reset();
var rows = 10,
yy = 600 - 21 - 40 * rows;
var stack = Composites.stack(400, yy, 5, rows, 0, 0, function(x, y, column, row) {
return Bodies.rectangle(x, y, 40, 40, { friction: 0.9, restitution: 0.1 });
});
World.addComposite(_world, stack);
var ball = Bodies.circle(100, 400, 50, { density: 1, frictionAir: 0.001});
World.addBody(_world, ball);
World.addConstraint(_world, Constraint.create({
pointA: { x: 300, y: 100 },
bodyB: ball
}));
var renderOptions = _engine.render.options;
renderOptions.showCollisions = true;
renderOptions.showVelocity = true;
};
Demo.ballPool = function() {
var _world = _engine.world;
Demo.reset();
var stack = Composites.stack(100, 50, 10, 15, 10, 10, function(x, y, column, row) {
return Bodies.circle(x, y, Common.random(15, 30), { restitution: 0.6, friction: 0.1 });
});
World.addComposite(_world, stack);
World.addBody(_world, Bodies.polygon(200, 560, 3, 60));
World.addBody(_world, Bodies.polygon(400, 560, 5, 60));
World.addBody(_world, Bodies.rectangle(600, 560, 80, 80));
var renderOptions = _engine.render.options;
};
Demo.stress = function() {
var _world = _engine.world;
Demo.reset();
var stack = Composites.stack(90, 30, 18, 15, 0, 0, function(x, y, column, row) {
return Bodies.rectangle(x, y, 35, 35);
});
World.addComposite(_world, stack);
var renderOptions = _engine.render.options;
renderOptions.showAngleIndicator = false;
};
Demo.stress2 = function() {
var _world = _engine.world;
Demo.reset();
var stack = Composites.stack(100, 120, 25, 18, 0, 0, function(x, y, column, row) {
return Bodies.rectangle(x, y, 25, 25);
});
World.addComposite(_world, stack);
var renderOptions = _engine.render.options;
renderOptions.showAngleIndicator = false;
};
Demo.pyramid = function() {
var _world = _engine.world;
Demo.reset();
var stack = Composites.pyramid(100, 100, 15, 10, 0, 0, function(x, y, column, row) {
return Bodies.rectangle(x, y, 40, 40);
});
World.addComposite(_world, stack);
var renderOptions = _engine.render.options;
};
Demo.restitution = function() {
var _world = _engine.world;
Demo.reset();
var rest = 0.9,
space = 600 / 5;
World.addBody(_world, Bodies.rectangle(100 + space * 0, 150, 50, 50, { restitution: rest }));
World.addBody(_world, Bodies.rectangle(100 + space * 1, 150, 50, 50, { restitution: rest, angle: -Math.PI * 0.15 }));
World.addBody(_world, Bodies.rectangle(100 + space * 2, 150, 50, 50, { restitution: rest, angle: -Math.PI * 0.25 }));
World.addBody(_world, Bodies.circle(100 + space * 3, 150, 25, { restitution: rest }));
World.addBody(_world, Bodies.rectangle(100 + space * 5, 150, 180, 20, { restitution: rest, angle: -Math.PI * 0.5 }));
var renderOptions = _engine.render.options;
renderOptions.showCollisions = true;
renderOptions.showVelocity = true;
renderOptions.showAngleIndicator = true;
};
Demo.beachBalls = function() {
var _world = _engine.world;
Demo.reset();
var stack = Composites.stack(0, 100, 5, 1, 20, 0, function(x, y, column, row) {
return Bodies.circle(x, y, 75, { restitution: 0.9 });
});
World.addComposite(_world, stack);
};
})();