From b93c08fda3459999fc8cc442539d6331d968f812 Mon Sep 17 00:00:00 2001 From: liabru Date: Mon, 26 Jun 2017 23:20:58 +0100 Subject: [PATCH] added Example.constraints --- demo/index.html | 1 + demo/js/Demo.js | 6 ++ examples/constraints.js | 180 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 187 insertions(+) create mode 100644 examples/constraints.js diff --git a/demo/index.html b/demo/index.html index e248179..dd2eb04 100644 --- a/demo/index.html +++ b/demo/index.html @@ -44,6 +44,7 @@ + diff --git a/demo/js/Demo.js b/demo/js/Demo.js index 4a7a498..a0dea63 100644 --- a/demo/js/Demo.js +++ b/demo/js/Demo.js @@ -118,6 +118,12 @@ init: Example.concave, sourceLink: sourceLinkRoot + '/concave.js' }, + { + name: 'Constraints', + id: 'constraints', + init: Example.constraints, + sourceLink: sourceLinkRoot + '/constraints.js' + }, { name: 'Double Pendulum', id: 'doublePendulum', diff --git a/examples/constraints.js b/examples/constraints.js new file mode 100644 index 0000000..5db0161 --- /dev/null +++ b/examples/constraints.js @@ -0,0 +1,180 @@ +var Example = Example || {}; + +Example.constraints = function() { + var Engine = Matter.Engine, + Render = Matter.Render, + Runner = Matter.Runner, + 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: Math.min(document.documentElement.clientWidth, 800), + height: Math.min(document.documentElement.clientHeight, 600), + showAngleIndicator: true + } + }); + + Render.run(render); + + // create runner + var runner = Runner.create(); + Runner.run(runner, engine); + + // add stiff global constraint + var body = Bodies.polygon(150, 200, 5, 30); + + var constraint = Constraint.create({ + pointA: { x: 150, y: 100 }, + bodyB: body, + pointB: { x: -10, y: -10 } + }); + + World.add(world, [body, constraint]); + + // add soft global constraint + var body = Bodies.polygon(280, 100, 3, 30); + + var constraint = Constraint.create({ + pointA: { x: 280, y: 120 }, + bodyB: body, + pointB: { x: -10, y: -7 }, + stiffness: 0.001 + }); + + World.add(world, [body, constraint]); + + // add damped soft global constraint + var body = Bodies.polygon(400, 100, 4, 30); + + var constraint = Constraint.create({ + pointA: { x: 400, y: 120 }, + bodyB: body, + pointB: { x: -10, y: -10 }, + stiffness: 0.001, + damping: 0.05 + }); + + World.add(world, [body, constraint]); + + // add revolute constraint + var body = Bodies.rectangle(600, 200, 200, 20); + var ball = Bodies.circle(550, 150, 20); + + var constraint = Constraint.create({ + pointA: { x: 600, y: 200 }, + bodyB: body, + length: 0 + }); + + World.add(world, [body, ball, constraint]); + + // add revolute multi-body constraint + var body = Bodies.rectangle(500, 400, 100, 20, { collisionFilter: { group: -1 } }); + var ball = Bodies.circle(600, 400, 20, { collisionFilter: { group: -1 } }); + + var constraint = Constraint.create({ + bodyA: body, + bodyB: ball + }); + + World.add(world, [body, ball, constraint]); + + // add stiff multi-body constraint + var bodyA = Bodies.polygon(100, 400, 6, 20); + var bodyB = Bodies.polygon(200, 400, 1, 50); + + var constraint = Constraint.create({ + bodyA: bodyA, + pointA: { x: -10, y: -10 }, + bodyB: bodyB, + pointB: { x: -10, y: -10 } + }); + + World.add(world, [bodyA, bodyB, constraint]); + + // add soft global constraint + var bodyA = Bodies.polygon(300, 400, 4, 20); + var bodyB = Bodies.polygon(400, 400, 3, 30); + + var constraint = Constraint.create({ + bodyA: bodyA, + pointA: { x: -10, y: -10 }, + bodyB: bodyB, + pointB: { x: -10, y: -7 }, + stiffness: 0.001 + }); + + World.add(world, [bodyA, bodyB, constraint]); + + // add damped soft global constraint + var bodyA = Bodies.polygon(500, 400, 6, 30); + var bodyB = Bodies.polygon(600, 400, 7, 60); + + var constraint = Constraint.create({ + bodyA: bodyA, + pointA: { x: -10, y: -10 }, + bodyB: bodyB, + pointB: { x: -10, y: -10 }, + stiffness: 0.001, + damping: 0.1 + }); + + World.add(world, [bodyA, bodyB, constraint]); + + World.add(world, [ + // walls + Bodies.rectangle(400, 0, 800, 50, { isStatic: true }), + Bodies.rectangle(400, 600, 800, 50, { isStatic: true }), + Bodies.rectangle(800, 300, 50, 600, { isStatic: true }), + Bodies.rectangle(0, 300, 50, 600, { isStatic: true }) + ]); + + // add mouse control + var mouse = Mouse.create(render.canvas), + mouseConstraint = MouseConstraint.create(engine, { + mouse: mouse, + constraint: { + // allow bodies on mouse to rotate + 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); + } + }; +}; \ No newline at end of file