planck-js/example/ContinuousTest.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('ContinuousTest', function(testbed) {
  var pl = planck, Vec2 = pl.Vec2;
  var world = pl.World(Vec2(0, -10));
  
  var stats = pl.internal.stats;

  var bullet;
  var angularVelocity;

  var ground = world.createBody(Vec2(0.0, 0.0));

  ground.createFixture(pl.Edge(Vec2(-10.0, 0.0), Vec2(10.0, 0.0)), 0.0);
  ground.createFixture(pl.Box(0.2, 1.0, Vec2(0.5, 1.0), 0.0), 0.0);

  if (1) {
    // angle = 0.1;
    bullet = world.createDynamicBody(Vec2(0.0, 20.0));
    bullet.createFixture(pl.Box(2.0, 0.1), 1.0);

    angularVelocity = pl.Math.random(-50.0, 50.0);
    // angularVelocity = 46.661274;
    bullet.setLinearVelocity(Vec2(0.0, -100.0));
    bullet.setAngularVelocity(angularVelocity);

  } else {
    var shape = pl.Circle(0.5);

    var body = world.createDynamicBody(Vec2(0.0, 2.0));
    body.createFixture(shape, 1.0);

    var body = world.createDynamicBody({
      bullet: true,
      position: Vec2(0.0, 2.0),
    });
    body.createFixture(shape, 1.0);
    body.setLinearVelocity(Vec2(0.0, -100.0));
  }

  function Launch() {
    stats.gjkCalls = 0;
    stats.gjkIters = 0;
    stats.gjkMaxIters = 0;

    stats.toiCalls = 0;
    stats.toiIters = 0;
    stats.toiRootIters = 0;
    stats.toiMaxRootIters = 0;
    stats.toiTime = 0.0;
    stats.toiMaxTime = 0.0;

    bullet.setTransform(Vec2(0.0, 20.0), 0.0);
    angularVelocity = pl.Math.random(-50.0, 50.0);
    bullet.setLinearVelocity(Vec2(0.0, -100.0));
    bullet.setAngularVelocity(angularVelocity);
  }

  Launch();

  var stepCount = 0;
  testbed.step = function() {
    testbed.status(stats);

    if (stats.gjkCalls > 0) {
      // "gjk calls = %d, ave gjk iters = %3.1, max gjk iters = %d", stats.gjkCalls, stats.gjkIters / float32(stats.gjkCalls), stats.gjkMaxIters
    }

    if (stats.toiCalls > 0) {
      // "toi calls = %d, ave [max] toi iters = %3.1 [%d]", stats.toiCalls, stats.toiIters / float32(stats.toiCalls), stats.toiMaxRootIters
      // "ave [max] toi root iters = %3.1 [%d]", stats.toiRootIters / float32(stats.toiCalls), stats.toiMaxRootIters
      // "ave [max] toi time = %.1 [%.1] (microseconds)", 1000.0 * stats.toiTime / float32(stats.toiCalls), 1000.0 * stats.toiMaxTime
    }

    if (stepCount++ % 60 == 0) {
      Launch();
    }
  };

  return world;
});