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Viewing changes to tests/box2d/Testbed/Tests/CollisionFiltering.h

  • Committer: Package Import Robot
  • Author(s): Sylvestre Ledru
  • Date: 2013-05-02 13:11:51 UTC
  • Revision ID: package-import@ubuntu.com-20130502131151-q8dvteqr1ef2x7xz
Tags: upstream-1.4.1~20130504~adb56cb
Import upstream version 1.4.1~20130504~adb56cb

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tests/box2d/Testbed/Tests/CollisionFiltering.h
 
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/*
 
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* Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
 
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*
 
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* This software is provided 'as-is', without any express or implied
 
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* warranty.  In no event will the authors be held liable for any damages
 
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* arising from the use of this software.
 
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* Permission is granted to anyone to use this software for any purpose,
 
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* including commercial applications, and to alter it and redistribute it
 
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* freely, subject to the following restrictions:
 
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* 1. The origin of this software must not be misrepresented; you must not
 
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* claim that you wrote the original software. If you use this software
 
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* in a product, an acknowledgment in the product documentation would be
 
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* appreciated but is not required.
 
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* 2. Altered source versions must be plainly marked as such, and must not be
 
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* misrepresented as being the original software.
 
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* 3. This notice may not be removed or altered from any source distribution.
 
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*/
 
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#ifndef COLLISION_FILTERING_H
 
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#define COLLISION_FILTERING_H
 
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// This is a test of collision filtering.
 
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// There is a triangle, a box, and a circle.
 
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// There are 6 shapes. 3 large and 3 small.
 
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// The 3 small ones always collide.
 
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// The 3 large ones never collide.
 
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// The boxes don't collide with triangles (except if both are small).
 
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const int16     k_smallGroup = 1;
 
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const int16 k_largeGroup = -1;
 
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const uint16 k_defaultCategory = 0x0001;
 
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const uint16 k_triangleCategory = 0x0002;
 
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const uint16 k_boxCategory = 0x0004;
 
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const uint16 k_circleCategory = 0x0008;
 
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const uint16 k_triangleMask = 0xFFFF;
 
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const uint16 k_boxMask = 0xFFFF ^ k_triangleCategory;
 
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const uint16 k_circleMask = 0xFFFF;
 
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class CollisionFiltering : public Test
 
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{
 
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public:
 
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        CollisionFiltering()
 
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        {
 
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                // Ground body
 
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                {
 
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                        b2EdgeShape shape;
 
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                        shape.Set(b2Vec2(-40.0f, 0.0f), b2Vec2(40.0f, 0.0f));
 
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                        b2FixtureDef sd;
 
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                        sd.shape = &shape;
 
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                        sd.friction = 0.3f;
 
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                        b2BodyDef bd;
 
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                        b2Body* ground = m_world->CreateBody(&bd);
 
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                        ground->CreateFixture(&sd);
 
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                }
 
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                // Small triangle
 
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                b2Vec2 vertices[3];
 
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                vertices[0].Set(-1.0f, 0.0f);
 
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                vertices[1].Set(1.0f, 0.0f);
 
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                vertices[2].Set(0.0f, 2.0f);
 
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                b2PolygonShape polygon;
 
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                polygon.Set(vertices, 3);
 
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                b2FixtureDef triangleShapeDef;
 
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                triangleShapeDef.shape = &polygon;
 
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                triangleShapeDef.density = 1.0f;
 
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                triangleShapeDef.filter.groupIndex = k_smallGroup;
 
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                triangleShapeDef.filter.categoryBits = k_triangleCategory;
 
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                triangleShapeDef.filter.maskBits = k_triangleMask;
 
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                b2BodyDef triangleBodyDef;
 
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                triangleBodyDef.type = b2_dynamicBody;
 
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                triangleBodyDef.position.Set(-5.0f, 2.0f);
 
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                b2Body* body1 = m_world->CreateBody(&triangleBodyDef);
 
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                body1->CreateFixture(&triangleShapeDef);
 
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                // Large triangle (recycle definitions)
 
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                vertices[0] *= 2.0f;
 
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                vertices[1] *= 2.0f;
 
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                vertices[2] *= 2.0f;
 
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                polygon.Set(vertices, 3);
 
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                triangleShapeDef.filter.groupIndex = k_largeGroup;
 
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                triangleBodyDef.position.Set(-5.0f, 6.0f);
 
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                triangleBodyDef.fixedRotation = true; // look at me!
 
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                b2Body* body2 = m_world->CreateBody(&triangleBodyDef);
 
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                body2->CreateFixture(&triangleShapeDef);
 
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                {
 
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                        b2BodyDef bd;
 
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                        bd.type = b2_dynamicBody;
 
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                        bd.position.Set(-5.0f, 10.0f);
 
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                        b2Body* body = m_world->CreateBody(&bd);
 
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                        b2PolygonShape p;
 
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                        p.SetAsBox(0.5f, 1.0f);
 
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                        body->CreateFixture(&p, 1.0f);
 
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                        b2PrismaticJointDef jd;
 
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                        jd.bodyA = body2;
 
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                        jd.bodyB = body;
 
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                        jd.enableLimit = true;
 
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                        jd.localAnchorA.Set(0.0f, 4.0f);
 
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                        jd.localAnchorB.SetZero();
 
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                        jd.localAxisA.Set(0.0f, 1.0f);
 
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                        jd.lowerTranslation = -1.0f;
 
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                        jd.upperTranslation = 1.0f;
 
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                        m_world->CreateJoint(&jd);
 
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                }
 
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                // Small box
 
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                polygon.SetAsBox(1.0f, 0.5f);
 
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                b2FixtureDef boxShapeDef;
 
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                boxShapeDef.shape = &polygon;
 
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                boxShapeDef.density = 1.0f;
 
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                boxShapeDef.restitution = 0.1f;
 
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                boxShapeDef.filter.groupIndex = k_smallGroup;
 
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                boxShapeDef.filter.categoryBits = k_boxCategory;
 
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                boxShapeDef.filter.maskBits = k_boxMask;
 
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                b2BodyDef boxBodyDef;
 
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                boxBodyDef.type = b2_dynamicBody;
 
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                boxBodyDef.position.Set(0.0f, 2.0f);
 
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                b2Body* body3 = m_world->CreateBody(&boxBodyDef);
 
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                body3->CreateFixture(&boxShapeDef);
 
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                // Large box (recycle definitions)
 
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                polygon.SetAsBox(2.0f, 1.0f);
 
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                boxShapeDef.filter.groupIndex = k_largeGroup;
 
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                boxBodyDef.position.Set(0.0f, 6.0f);
 
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                b2Body* body4 = m_world->CreateBody(&boxBodyDef);
 
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                body4->CreateFixture(&boxShapeDef);
 
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                // Small circle
 
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                b2CircleShape circle;
 
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                circle.m_radius = 1.0f;
 
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                b2FixtureDef circleShapeDef;
 
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                circleShapeDef.shape = &circle;
 
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                circleShapeDef.density = 1.0f;
 
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                circleShapeDef.filter.groupIndex = k_smallGroup;
 
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                circleShapeDef.filter.categoryBits = k_circleCategory;
 
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                circleShapeDef.filter.maskBits = k_circleMask;
 
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                b2BodyDef circleBodyDef;
 
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                circleBodyDef.type = b2_dynamicBody;
 
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                circleBodyDef.position.Set(5.0f, 2.0f);
 
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                b2Body* body5 = m_world->CreateBody(&circleBodyDef);
 
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                body5->CreateFixture(&circleShapeDef);
 
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                // Large circle
 
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                circle.m_radius *= 2.0f;
 
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                circleShapeDef.filter.groupIndex = k_largeGroup;
 
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                circleBodyDef.position.Set(5.0f, 6.0f);
 
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                b2Body* body6 = m_world->CreateBody(&circleBodyDef);
 
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                body6->CreateFixture(&circleShapeDef);
 
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        }
 
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        static Test* Create()
 
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        {
 
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                return new CollisionFiltering;
 
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        }
 
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};
 
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#endif