Add initial prototype.

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

@@ -0,0 +1,89 @@
+// 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 CircleStack : public Test
+{
+public:
+
+	enum
+	{
+		e_count = 10
+	};
+
+	CircleStack()
+	{
+		{
+			b2BodyDef bd;
+			b2Body* ground = m_world->CreateBody(&bd);
+
+			b2EdgeShape shape;
+			shape.SetTwoSided(b2Vec2(-40.0f, 0.0f), b2Vec2(40.0f, 0.0f));
+			ground->CreateFixture(&shape, 0.0f);
+		}
+
+		{
+			b2CircleShape shape;
+			shape.m_radius = 1.0f;
+
+			for (int32 i = 0; i < e_count; ++i)
+			{
+				b2BodyDef bd;
+				bd.type = b2_dynamicBody;
+				bd.position.Set(0.0, 4.0f + 3.0f * i);
+
+				m_bodies[i] = m_world->CreateBody(&bd);
+
+				m_bodies[i]->CreateFixture(&shape, 1.0f);
+
+				m_bodies[i]->SetLinearVelocity(b2Vec2(0.0f, -50.0f));
+			}
+		}
+	}
+
+	void Step(Settings& settings) override
+	{
+		Test::Step(settings);
+
+		//for (int32 i = 0; i < e_count; ++i)
+		//{
+		//	printf("%g ", m_bodies[i]->GetWorldCenter().y);
+		//}
+
+		//for (int32 i = 0; i < e_count; ++i)
+		//{
+		//	printf("%g ", m_bodies[i]->GetLinearVelocity().y);
+		//}
+
+		//printf("\n");
+	}
+
+	static Test* Create()
+	{
+		return new CircleStack;
+	}
+
+	b2Body* m_bodies[e_count];
+};
+
+static int testIndex = RegisterTest("Stacking", "Circles", CircleStack::Create);