b2WorldCallbacks.cpp
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1 /*
2 * Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
3 *
4 * This software is provided 'as-is', without any express or implied
5 * warranty. In no event will the authors be held liable for any damages
6 * arising from the use of this software.
7 * Permission is granted to anyone to use this software for any purpose,
8 * including commercial applications, and to alter it and redistribute it
9 * freely, subject to the following restrictions:
10 * 1. The origin of this software must not be misrepresented; you must not
11 * claim that you wrote the original software. If you use this software
12 * in a product, an acknowledgment in the product documentation would be
13 * appreciated but is not required.
14 * 2. Altered source versions must be plainly marked as such, and must not be
15 * misrepresented as being the original software.
16 * 3. This notice may not be removed or altered from any source distribution.
17 */
18 
21 
22 // Return true if contact calculations should be performed between these two shapes.
23 // If you implement your own collision filter you may want to build from this implementation.
25 {
26  const b2Filter& filterA = fixtureA->GetFilterData();
27  const b2Filter& filterB = fixtureB->GetFilterData();
28 
29  if (filterA.groupIndex == filterB.groupIndex && filterA.groupIndex != 0)
30  {
31  return filterA.groupIndex > 0;
32  }
33 
34  bool collide = (filterA.maskBits & filterB.categoryBits) != 0 && (filterA.categoryBits & filterB.maskBits) != 0;
35  return collide;
36 }
const b2Filter & GetFilterData() const
Get the contact filtering data.
Definition: b2Fixture.h:258
virtual bool ShouldCollide(b2Fixture *fixtureA, b2Fixture *fixtureB)
This holds contact filtering data.
Definition: b2Fixture.h:32
int16 groupIndex
Definition: b2Fixture.h:51
uint16 categoryBits
The collision category bits. Normally you would just set one bit.
Definition: b2Fixture.h:42
uint16 maskBits
Definition: b2Fixture.h:46


mvsim
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autogenerated on Fri May 7 2021 03:05:51