Add initial prototype.

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

@@ -0,0 +1,88 @@
+// 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"
+
+// This test holds worlds dumped using b2World::Dump.
+class DumpLoader : public Test
+{
+public:
+
+	DumpLoader()
+	{
+		b2ChainShape chainShape;
+		b2Vec2 vertices[] = {b2Vec2(-5,0), b2Vec2(5,0), b2Vec2(5,5), b2Vec2(4,1), b2Vec2(-4,1), b2Vec2(-5,5)};
+		chainShape.CreateLoop(vertices, 6);
+
+		b2FixtureDef groundFixtureDef;
+		groundFixtureDef.density = 0;
+		groundFixtureDef.shape = &chainShape;
+
+		b2BodyDef groundBodyDef;
+		groundBodyDef.type = b2_staticBody;
+
+		b2Body *groundBody = m_world->CreateBody(&groundBodyDef);
+		b2Fixture *groundBodyFixture = groundBody->CreateFixture(&groundFixtureDef);
+
+		b2CircleShape ballShape;
+		ballShape.m_radius = 1;
+
+		b2FixtureDef ballFixtureDef;
+		ballFixtureDef.restitution = 0.75f;
+		ballFixtureDef.density = 1;
+		ballFixtureDef.shape = &ballShape;
+
+		b2BodyDef ballBodyDef;
+		ballBodyDef.type = b2BodyType::b2_dynamicBody;
+		ballBodyDef.position = b2Vec2(0, 10);
+		// ballBodyDef.angularDamping = 0.2f;
+
+		m_ball = m_world->CreateBody(&ballBodyDef);
+		b2Fixture *ballFixture = m_ball->CreateFixture(&ballFixtureDef);
+		m_ball->ApplyForceToCenter(b2Vec2(-1000, -400), true);
+	}
+
+	void Step(Settings& settings) override
+	{
+		b2Vec2 v = m_ball->GetLinearVelocity();
+		float omega = m_ball->GetAngularVelocity();
+
+		b2MassData massData;
+		m_ball->GetMassData(&massData);
+
+		float ke = 0.5f * massData.mass * b2Dot(v, v) + 0.5f * massData.I * omega * omega;
+
+		g_debugDraw.DrawString(5, m_textLine, "kinetic energy = %.6f", ke);
+		m_textLine += m_textIncrement;
+
+		Test::Step(settings);
+	}
+
+	static Test* Create()
+	{
+		return new DumpLoader;
+	}
+
+	b2Body* m_ball;
+};
+
+static int testIndex = RegisterTest("Bugs", "Dump Loader", DumpLoader::Create);