Add initial prototype.

3-mid/physics/implement/box2d/contrib/testbed/tests/tumbler.cpp

@@ -0,0 +1,102 @@
+// 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.
+
+#include "test.h"
+
+class Tumbler : public Test
+{
+public:
+
+	enum
+	{
+		e_count = 800
+	};
+
+	Tumbler()
+	{
+		b2Body* ground = NULL;
+		{
+			b2BodyDef bd;
+			ground = m_world->CreateBody(&bd);
+		}
+
+		{
+			b2BodyDef bd;
+			bd.type = b2_dynamicBody;
+			bd.allowSleep = false;
+			bd.position.Set(0.0f, 10.0f);
+			b2Body* body = m_world->CreateBody(&bd);
+
+			b2PolygonShape shape;
+			shape.SetAsBox(0.5f, 10.0f, b2Vec2( 10.0f, 0.0f), 0.0);
+			body->CreateFixture(&shape, 5.0f);
+			shape.SetAsBox(0.5f, 10.0f, b2Vec2(-10.0f, 0.0f), 0.0);
+			body->CreateFixture(&shape, 5.0f);
+			shape.SetAsBox(10.0f, 0.5f, b2Vec2(0.0f, 10.0f), 0.0);
+			body->CreateFixture(&shape, 5.0f);
+			shape.SetAsBox(10.0f, 0.5f, b2Vec2(0.0f, -10.0f), 0.0);
+			body->CreateFixture(&shape, 5.0f);
+
+			b2RevoluteJointDef jd;
+			jd.bodyA = ground;
+			jd.bodyB = body;
+			jd.localAnchorA.Set(0.0f, 10.0f);
+			jd.localAnchorB.Set(0.0f, 0.0f);
+			jd.referenceAngle = 0.0f;
+			jd.motorSpeed = 0.05f * b2_pi;
+			jd.maxMotorTorque = 1e8f;
+			jd.enableMotor = true;
+			m_joint = (b2RevoluteJoint*)m_world->CreateJoint(&jd);
+		}
+
+		m_count = 0;
+	}
+
+	void Step(Settings& settings) override
+	{
+		Test::Step(settings);
+
+		if (m_count < e_count)
+		{
+			b2BodyDef bd;
+			bd.type = b2_dynamicBody;
+			bd.position.Set(0.0f, 10.0f);
+			b2Body* body = m_world->CreateBody(&bd);
+
+			b2PolygonShape shape;
+			shape.SetAsBox(0.125f, 0.125f);
+			body->CreateFixture(&shape, 1.0f);
+
+			++m_count;
+		}
+	}
+
+	static Test* Create()
+	{
+		return new Tumbler;
+	}
+
+	b2RevoluteJoint* m_joint;
+	int32 m_count;
+};
+
+static int testIndex = RegisterTest("Benchmark", "Tumbler", Tumbler::Create);