119 lines
2.6 KiB
C++
119 lines
2.6 KiB
C++
/*
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* Copyright (c) 2016-2019 Irlan Robson https://irlanrobson.github.io
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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 CONVEYOR_BELT_H
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#define CONVEYOR_BELT_H
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class ConveyorBelt : public Test
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{
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public:
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ConveyorBelt()
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{
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{
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// Ground
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b3BodyDef bd;
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b3Body* body = m_world.CreateBody(bd);
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b3HullShape hs;
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hs.m_hull = &m_groundHull;
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b3ShapeDef sd;
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sd.shape = &hs;
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body->CreateShape(sd);
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}
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{
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// Platform
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b3BodyDef bd;
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bd.position.Set(0.0f, 5.0f, 0.0f);
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b3Body* body = m_world.CreateBody(bd);
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m_platformHull.SetExtents(10.0f, 0.5f, 2.0f);
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b3HullShape hs;
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hs.m_hull = &m_platformHull;
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b3ShapeDef sd;
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sd.shape = &hs;
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sd.friction = 0.8f;
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m_platform = body->CreateShape(sd);
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}
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// Boxes
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m_boxHull.SetExtents(0.5f, 0.5f, 0.5f);
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for (u32 i = 0; i < 5; ++i)
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{
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b3BodyDef bd;
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bd.type = e_dynamicBody;
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bd.position.Set(2.0f * i, 7.0f, 0.0f);
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b3Body* body = m_world.CreateBody(bd);
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b3HullShape hs;
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hs.m_hull = &m_boxHull;
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b3ShapeDef sd;
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sd.shape = &hs;
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sd.density = 0.2f;
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body->CreateShape(sd);
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}
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}
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void PreSolve(b3Contact* contact)
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{
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Test::PreSolve(contact);
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b3Shape* shapeA = contact->GetShapeA();
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b3Shape* shapeB = contact->GetShapeB();
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if (shapeA == m_platform)
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{
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for (u32 i = 0; i < contact->GetManifoldCount(); ++i)
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{
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b3Manifold* manifold = contact->GetManifold(i);
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manifold->motorSpeed = 0.25f * B3_PI;
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manifold->tangentSpeed2 = -2.0f;
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}
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}
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if (shapeB == m_platform)
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{
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for (u32 i = 0; i < contact->GetManifoldCount(); ++i)
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{
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b3Manifold* manifold = contact->GetManifold(i);
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manifold->motorSpeed = -0.25f * B3_PI;
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manifold->tangentSpeed2 = 2.0f;
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}
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}
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}
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static Test* Create()
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{
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return new ConveyorBelt();
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}
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b3BoxHull m_platformHull;
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b3Shape* m_platform;
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b3BoxHull m_boxHull;
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};
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#endif |