Add initial prototype.

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

@@ -0,0 +1,92 @@
+// 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 Pyramid : public Test
+{
+public:
+	enum
+	{
+		e_count = 20
+	};
+
+	Pyramid()
+	{
+		{
+			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);
+		}
+
+		{
+			float a = 0.5f;
+			b2PolygonShape shape;
+			shape.SetAsBox(a, a);
+
+			b2Vec2 x(-7.0f, 0.75f);
+			b2Vec2 y;
+			b2Vec2 deltaX(0.5625f, 1.25f);
+			b2Vec2 deltaY(1.125f, 0.0f);
+
+			for (int32 i = 0; i < e_count; ++i)
+			{
+				y = x;
+
+				for (int32 j = i; j < e_count; ++j)
+				{
+					b2BodyDef bd;
+					bd.type = b2_dynamicBody;
+					bd.position = y;
+					b2Body* body = m_world->CreateBody(&bd);
+					body->CreateFixture(&shape, 5.0f);
+
+					y += deltaY;
+				}
+
+				x += deltaX;
+			}
+		}
+	}
+
+	void Step(Settings& settings) override
+	{
+		Test::Step(settings);
+
+		//b2DynamicTree* tree = &m_world->m_contactManager.m_broadPhase.m_tree;
+
+		//if (m_stepCount == 400)
+		//{
+		//	tree->RebuildBottomUp();
+		//}
+	}
+
+	static Test* Create()
+	{
+		return new Pyramid;
+	}
+};
+
+static int testIndex = RegisterTest("Stacking", "Pyramid", Pyramid::Create);