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liabru-matter-js/examples/ragdoll.js

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2017-07-06 16:49:42 -04:00
var Example = Example || {};
Example.ragdoll = function() {
var Engine = Matter.Engine,
Events = Matter.Events,
Render = Matter.Render,
Runner = Matter.Runner,
Body = Matter.Body,
Common = Matter.Common,
Composite = Matter.Composite,
Composites = Matter.Composites,
Constraint = Matter.Constraint,
MouseConstraint = Matter.MouseConstraint,
Mouse = Matter.Mouse,
World = Matter.World,
Bodies = Matter.Bodies,
Vector = Matter.Vector;
// 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,
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showAngleIndicator: true,
background: '#0f0f13'
}
});
Render.run(render);
// create runner
var runner = Runner.create();
Runner.run(runner, engine);
// create stairs
var stairCount = (render.bounds.max.y - render.bounds.min.y) / 50;
var stack = Composites.stack(0, 0, stairCount + 2, 1, 0, 0, function(x, y, column) {
return Bodies.rectangle(x - 50, y + column * 50, 100, 1000, {
isStatic: true,
render: {
fillStyle: '#222'
}
});
});
// create obstacles
var obstacles = Composites.stack(300, 0, 15, 3, 10, 10, function(x, y, column) {
var sides = Math.round(Common.random(1, 8)),
options = {
render: {
fillStyle: Common.choose(['#006BA6', '#0496FF', '#D81159', '#8F2D56'])
}
};
switch (Math.round(Common.random(0, 1))) {
case 0:
if (Common.random() < 0.8) {
return Bodies.rectangle(x, y, Common.random(25, 50), Common.random(25, 50), options);
} else {
return Bodies.rectangle(x, y, Common.random(80, 120), Common.random(25, 30), options);
}
case 1:
return Bodies.polygon(x, y, sides, Common.random(25, 50), options);
}
});
var ragdolls = Composite.create();
for (var i = 0; i < 1; i += 1) {
var ragdoll = Example.ragdoll.ragdoll(200, -1000 * i, 1.3);
Composite.add(ragdolls, ragdoll);
}
World.add(world, [stack, obstacles, ragdolls]);
var timeScaleTarget = 1,
counter = 0;
Events.on(engine, 'afterUpdate', function(event) {
// tween the timescale for slow-mo
if (mouse.button === -1) {
engine.timing.timeScale += (timeScaleTarget - engine.timing.timeScale) * 0.05;
} else {
engine.timing.timeScale = 1;
}
counter += 1;
// every 1.5 sec
if (counter >= 60 * 1.5) {
// flip the timescale
if (timeScaleTarget < 1) {
timeScaleTarget = 1;
} else {
timeScaleTarget = 0.05;
}
// reset counter
counter = 0;
}
for (var i = 0; i < stack.bodies.length; i += 1) {
var body = stack.bodies[i];
// animate stairs
Body.translate(body, {
x: -0.5 * engine.timing.timeScale,
y: -0.5 * engine.timing.timeScale
});
// loop stairs when they go off screen
if (body.position.x < -50) {
Body.setPosition(body, {
x: 50 * (stack.bodies.length - 1),
y: 25 + render.bounds.max.y + (body.bounds.max.y - body.bounds.min.y) * 0.5
});
Body.setVelocity(body, {
x: 0,
y: 0
});
}
}
for (i = 0; i < ragdolls.composites.length; i += 1) {
var ragdoll = ragdolls.composites[i],
bounds = Composite.bounds(ragdoll);
// move ragdolls back to the top of the screen
if (bounds.min.y > render.bounds.max.y + 100) {
Composite.translate(ragdoll, {
x: -bounds.min.x * 0.9,
y: -render.bounds.max.y - 400
});
}
}
for (i = 0; i < obstacles.bodies.length; i += 1) {
var body = obstacles.bodies[i],
bounds = body.bounds;
// move obstacles back to the top of the screen
if (bounds.min.y > render.bounds.max.y + 100) {
Body.translate(body, {
x: -bounds.min.x,
y: -render.bounds.max.y - 300
});
}
}
});
// add mouse control and make the mouse revolute
var mouse = Mouse.create(render.canvas),
mouseConstraint = MouseConstraint.create(engine, {
mouse: mouse,
constraint: {
stiffness: 0.6,
length: 0,
angularStiffness: 0,
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);
}
};
};
Example.ragdoll.ragdoll = function(x, y, scale, options) {
scale = typeof scale === 'undefined' ? 1 : scale;
var Body = Matter.Body,
Bodies = Matter.Bodies,
Constraint = Matter.Constraint,
Composite = Matter.Composite,
Common = Matter.Common;
var headOptions = Common.extend({
label: 'head',
collisionFilter: {
group: Body.nextGroup(true)
},
chamfer: {
radius: [15 * scale, 15 * scale, 15 * scale, 15 * scale]
},
render: {
fillStyle: '#FFBC42'
}
}, options);
var chestOptions = Common.extend({
label: 'chest',
collisionFilter: {
group: Body.nextGroup(true)
},
chamfer: {
radius: [20 * scale, 20 * scale, 26 * scale, 26 * scale]
},
render: {
fillStyle: '#E0A423'
}
}, options);
var leftArmOptions = Common.extend({
label: 'left-arm',
collisionFilter: {
group: Body.nextGroup(true)
},
chamfer: {
radius: 10 * scale
},
render: {
fillStyle: '#FFBC42'
}
}, options);
var leftLowerArmOptions = Common.extend({}, leftArmOptions, {
render: {
fillStyle: '#E59B12'
}
});
var rightArmOptions = Common.extend({
label: 'right-arm',
collisionFilter: {
group: Body.nextGroup(true)
},
chamfer: {
radius: 10 * scale
},
render: {
fillStyle: '#FFBC42'
}
}, options);
var rightLowerArmOptions = Common.extend({}, rightArmOptions, {
render: {
fillStyle: '#E59B12'
}
});
var leftLegOptions = Common.extend({
label: 'left-leg',
collisionFilter: {
group: Body.nextGroup(true)
},
chamfer: {
radius: 10 * scale
},
render: {
fillStyle: '#FFBC42'
}
}, options);
var leftLowerLegOptions = Common.extend({}, leftLegOptions, {
render: {
fillStyle: '#E59B12'
}
});
var rightLegOptions = Common.extend({
label: 'right-leg',
collisionFilter: {
group: Body.nextGroup(true)
},
chamfer: {
radius: 10 * scale
},
render: {
fillStyle: '#FFBC42'
}
}, options);
var rightLowerLegOptions = Common.extend({}, rightLegOptions, {
render: {
fillStyle: '#E59B12'
}
});
var head = Bodies.rectangle(x, y - 60 * scale, 34 * scale, 40 * scale, headOptions);
var chest = Bodies.rectangle(x, y, 55 * scale, 80 * scale, chestOptions);
var rightUpperArm = Bodies.rectangle(x + 39 * scale, y - 15 * scale, 20 * scale, 40 * scale, rightArmOptions);
var rightLowerArm = Bodies.rectangle(x + 39 * scale, y + 25 * scale, 20 * scale, 60 * scale, rightLowerArmOptions);
var leftUpperArm = Bodies.rectangle(x - 39 * scale, y - 15 * scale, 20 * scale, 40 * scale, leftArmOptions);
var leftLowerArm = Bodies.rectangle(x - 39 * scale, y + 25 * scale, 20 * scale, 60 * scale, leftLowerArmOptions);
var leftUpperLeg = Bodies.rectangle(x - 20 * scale, y + 57 * scale, 20 * scale, 40 * scale, leftLegOptions);
var leftLowerLeg = Bodies.rectangle(x - 20 * scale, y + 97 * scale, 20 * scale, 60 * scale, leftLowerLegOptions);
var rightUpperLeg = Bodies.rectangle(x + 20 * scale, y + 57 * scale, 20 * scale, 40 * scale, rightLegOptions);
var rightLowerLeg = Bodies.rectangle(x + 20 * scale, y + 97 * scale, 20 * scale, 60 * scale, rightLowerLegOptions);
var chestToRightUpperArm = Constraint.create({
bodyA: chest,
pointA: {
x: 24 * scale,
y: -23 * scale
},
pointB: {
x: 0,
y: -8 * scale
},
bodyB: rightUpperArm,
stiffness: 0.6,
render: {
visible: false
}
});
var chestToLeftUpperArm = Constraint.create({
bodyA: chest,
pointA: {
x: -24 * scale,
y: -23 * scale
},
pointB: {
x: 0,
y: -8 * scale
},
bodyB: leftUpperArm,
stiffness: 0.6,
render: {
visible: false
}
});
var chestToLeftUpperLeg = Constraint.create({
bodyA: chest,
pointA: {
x: -10 * scale,
y: 30 * scale
},
pointB: {
x: 0,
y: -10 * scale
},
bodyB: leftUpperLeg,
stiffness: 0.6,
render: {
visible: false
}
});
var chestToRightUpperLeg = Constraint.create({
bodyA: chest,
pointA: {
x: 10 * scale,
y: 30 * scale
},
pointB: {
x: 0,
y: -10 * scale
},
bodyB: rightUpperLeg,
stiffness: 0.6,
render: {
visible: false
}
});
var upperToLowerRightArm = Constraint.create({
bodyA: rightUpperArm,
bodyB: rightLowerArm,
pointA: {
x: 0,
y: 15 * scale
},
pointB: {
x: 0,
y: -25 * scale
},
stiffness: 0.6,
render: {
visible: false
}
});
var upperToLowerLeftArm = Constraint.create({
bodyA: leftUpperArm,
bodyB: leftLowerArm,
pointA: {
x: 0,
y: 15 * scale
},
pointB: {
x: 0,
y: -25 * scale
},
stiffness: 0.6,
render: {
visible: false
}
});
var upperToLowerLeftLeg = Constraint.create({
bodyA: leftUpperLeg,
bodyB: leftLowerLeg,
pointA: {
x: 0,
y: 20 * scale
},
pointB: {
x: 0,
y: -20 * scale
},
stiffness: 0.6,
render: {
visible: false
}
});
var upperToLowerRightLeg = Constraint.create({
bodyA: rightUpperLeg,
bodyB: rightLowerLeg,
pointA: {
x: 0,
y: 20 * scale
},
pointB: {
x: 0,
y: -20 * scale
},
stiffness: 0.6,
render: {
visible: false
}
});
var headContraint = Constraint.create({
bodyA: head,
pointA: {
x: 0,
y: 25 * scale
},
pointB: {
x: 0,
y: -35 * scale
},
bodyB: chest,
stiffness: 0.6,
render: {
visible: false
}
});
var legToLeg = Constraint.create({
bodyA: leftLowerLeg,
bodyB: rightLowerLeg,
stiffness: 0.01,
render: {
visible: false
}
});
var person = Composite.create({
bodies: [
chest, head, leftLowerArm, leftUpperArm,
rightLowerArm, rightUpperArm, leftLowerLeg,
rightLowerLeg, leftUpperLeg, rightUpperLeg
],
constraints: [
upperToLowerLeftArm, upperToLowerRightArm, chestToLeftUpperArm,
chestToRightUpperArm, headContraint, upperToLowerLeftLeg,
upperToLowerRightLeg, chestToLeftUpperLeg, chestToRightUpperLeg,
legToLeg
]
});
return person;
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};
if (typeof module !== 'undefined' && module.exports) {
module.exports = Example[Object.keys(Example)[0]];
}