Dominos.js

/*
 * Copyright (c) 2016-2018 Ali Shakiba http://shakiba.me/planck.js
 * Copyright (c) 2006-2009 Erin Catto  http://www.box2d.org
 *
 * This software is provided 'as-is', without any express or implied
 * warranty.  In no event will the authors be held liable for any damages
 * arising from the use of this software.
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 */

planck.testbed('Dominos', function(testbed) {
  var pl = planck, Vec2 = pl.Vec2;
  var world = new pl.World(Vec2(0, -10));

  testbed.width = 40;
  testbed.height = 40;

  var b1 = world.createBody();
  b1.createFixture(pl.Edge(Vec2(-40, 0), Vec2(40, 0)), 0);

  var ground = world.createBody(Vec2(-1.5, 10));
  ground.createFixture(pl.Box(6, 0.25), 0);

  var columnShape = pl.Box(0.1, 1);

  var fd = {};
  fd.density = 20;
  fd.friction = 0.1;

  for (var i = 0; i < 10; ++i) {
    var body = world.createDynamicBody(Vec2(-6 + 1 * i, 11.25));
    body.createFixture(columnShape, fd);
  }

  var ground = world.createBody(Vec2(1, 6));
  ground.createFixture(pl.Box(7, 0.25, Vec2(), 0.3), 0);

  var b2 = world.createBody(Vec2(-7, 4));
  b2.createFixture(pl.Box(0.25, 1.5), 0);

  var b3 = world.createDynamicBody(Vec2(-0.9, 1), -0.15);
  b3.createFixture(pl.Box(6, 0.125), 10);

  var jd = {};
  jd.collideConnected = true;
  world.createJoint(pl.RevoluteJoint(jd, b1, b3, Vec2(-2, 1)));

  var b4 = world.createDynamicBody(Vec2(-10, 15));
  b4.createFixture(pl.Box(0.25, 0.25), 10);

  world.createJoint(pl.RevoluteJoint(jd, b2, b4, Vec2(-7, 15)));

  var b5 = world.createDynamicBody(Vec2(6.5, 3));

  var fd = {};
  fd.density = 10;
  fd.friction = 0.1;

  b5.createFixture(pl.Box(1, 0.1, Vec2(0, -0.9), 0), fd);
  b5.createFixture(pl.Box(0.1, 1, Vec2(-0.9, 0), 0), fd);
  b5.createFixture(pl.Box(0.1, 1, Vec2(0.9, 0), 0), fd);

  world.createJoint(pl.RevoluteJoint(jd, b1, b5, Vec2(6, 2)));

  var b6 = world.createDynamicBody(Vec2(6.5, 4.1));
  b6.createFixture(pl.Box(1, 0.1), 30);

  world.createJoint(pl.RevoluteJoint(jd, b5, b6, Vec2(7.5, 4)));

  var b7 = world.createDynamicBody(Vec2(7.4, 1));
  b7.createFixture(pl.Box(0.1, 1), 10);

  world.createJoint(pl.DistanceJoint({}, b3, b3.getWorldPoint(Vec2(6, 0)), b7, b7.getWorldPoint(Vec2(0, -1))));

  var radius = 0.2;
  var circleShape = pl.Circle(radius);
  for (var i = 0; i < 4; ++i) {
    var body = world.createDynamicBody(Vec2(5.9 + 2 * radius * i, 2.4));
    body.createFixture(circleShape, 10);
  }

  return world;
});