Added Box2D

external/Box2D-2.3.1/Box2D/Testbed/Tests/ConveyorBelt.h

@@ -0,0 +1,98 @@
+/*
+* Copyright (c) 2011 Erin Catto http://www.box2d.org
+*
+* This software is provided 'as-is', without any express or implied
+* warranty.  In no event will the authors be held liable for any damages
+* arising from the use of this software.
+* Permission is granted to anyone to use this software for any purpose,
+* including commercial applications, and to alter it and redistribute it
+* freely, subject to the following restrictions:
+* 1. The origin of this software must not be misrepresented; you must not
+* claim that you wrote the original software. If you use this software
+* in a product, an acknowledgment in the product documentation would be
+* appreciated but is not required.
+* 2. Altered source versions must be plainly marked as such, and must not be
+* misrepresented as being the original software.
+* 3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef CONVEYOR_BELT_H
+#define CONVEYOR_BELT_H
+
+class ConveyorBelt : public Test
+{
+public:
+
+	ConveyorBelt()
+	{
+		// Ground
+		{
+			b2BodyDef bd;
+			b2Body* ground = m_world->CreateBody(&bd);
+
+			b2EdgeShape shape;
+			shape.Set(b2Vec2(-20.0f, 0.0f), b2Vec2(20.0f, 0.0f));
+			ground->CreateFixture(&shape, 0.0f);
+		}
+
+		// Platform
+		{
+			b2BodyDef bd;
+			bd.position.Set(-5.0f, 5.0f);
+			b2Body* body = m_world->CreateBody(&bd);
+
+			b2PolygonShape shape;
+			shape.SetAsBox(10.0f, 0.5f);
+
+			b2FixtureDef fd;
+			fd.shape = &shape;
+			fd.friction = 0.8f;
+			m_platform = body->CreateFixture(&fd);
+		}
+
+		// Boxes
+		for (int32 i = 0; i < 5; ++i)
+		{
+			b2BodyDef bd;
+			bd.type = b2_dynamicBody;
+			bd.position.Set(-10.0f + 2.0f * i, 7.0f);
+			b2Body* body = m_world->CreateBody(&bd);
+
+			b2PolygonShape shape;
+			shape.SetAsBox(0.5f, 0.5f);
+			body->CreateFixture(&shape, 20.0f);
+		}
+	}
+
+	void PreSolve(b2Contact* contact, const b2Manifold* oldManifold)
+	{
+		Test::PreSolve(contact, oldManifold);
+
+		b2Fixture* fixtureA = contact->GetFixtureA();
+		b2Fixture* fixtureB = contact->GetFixtureB();
+
+		if (fixtureA == m_platform)
+		{
+			contact->SetTangentSpeed(5.0f);
+		}
+
+		if (fixtureB == m_platform)
+		{
+			contact->SetTangentSpeed(-5.0f);
+		}
+	}
+
+	void Step(Settings* settings)
+	{
+		Test::Step(settings);
+	}
+
+	static Test* Create()
+	{
+		return new ConveyorBelt;
+	}
+
+	b2Fixture* m_platform;
+};
+
+#endif