planck-js/example/ShapeEditing.js

2D JavaScript physics engine for cross-platform HTML5 game development

/*
 * MIT License
 * Copyright (c) 2019 Erin Catto
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

planck.testbed('ShapeEditing', function(testbed) {
  testbed.info('C: Create a shape, X: Destroy a shape, Z: Sensor');

  var pl = planck, Vec2 = pl.Vec2;
  var world = new pl.World(Vec2(0, -10));

  var sensor = true;

  var ground = world.createBody();
  ground.createFixture(pl.Edge(Vec2(-40.0, 0.0), Vec2(40.0, 0.0)), 0.0);

  var body = world.createDynamicBody(Vec2(0.0, 10.0));

  var fixture1 = body.createFixture(pl.Box(4.0, 4.0, Vec2(0.0, 0.0), 0.0), 10.0);
  var fixture2 = null;

  testbed.keydown = function(code, char) {
    switch (char) {
    case 'C':
      if (fixture2 == null) {
        var shape = pl.Circle(Vec2(0.5, -4.0), 3.0);
        fixture2 = body.createFixture(shape, 10.0);
        body.setAwake(true);
        fixture2.setSensor(sensor);
      }
      break;

    case 'X':
      if (fixture2 != null) {
        body.destroyFixture(fixture2);
        fixture2 = null;
        body.setAwake(true);
      }
      break;

    case 'Z':
      if (fixture2 != null) {
        sensor = !sensor;
        fixture2.setSensor(sensor);
      }
      break;
    }

    updateStatus();
  };

  function updateStatus() {
    testbed.status('Sensor', sensor);
  }

  updateStatus();

  return world;
});