Add initial prototype.

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

@@ -0,0 +1,170 @@
+// 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 Confined : public Test
+{
+public:
+
+	enum
+	{
+		e_columnCount = 0,
+		e_rowCount = 0
+	};
+
+	Confined()
+	{
+		{
+			b2BodyDef bd;
+			b2Body* ground = m_world->CreateBody(&bd);
+
+			b2EdgeShape shape;
+
+			// Floor
+			shape.SetTwoSided(b2Vec2(-10.0f, 0.0f), b2Vec2(10.0f, 0.0f));
+			ground->CreateFixture(&shape, 0.0f);
+
+			// Left wall
+			shape.SetTwoSided(b2Vec2(-10.0f, 0.0f), b2Vec2(-10.0f, 20.0f));
+			ground->CreateFixture(&shape, 0.0f);
+
+			// Right wall
+			shape.SetTwoSided(b2Vec2(10.0f, 0.0f), b2Vec2(10.0f, 20.0f));
+			ground->CreateFixture(&shape, 0.0f);
+
+			// Roof
+			shape.SetTwoSided(b2Vec2(-10.0f, 20.0f), b2Vec2(10.0f, 20.0f));
+			ground->CreateFixture(&shape, 0.0f);
+		}
+
+		float radius = 0.5f;
+		b2CircleShape shape;
+		shape.m_p.SetZero();
+		shape.m_radius = radius;
+
+		b2FixtureDef fd;
+		fd.shape = &shape;
+		fd.density = 1.0f;
+		fd.friction = 0.1f;
+
+		for (int32 j = 0; j < e_columnCount; ++j)
+		{
+			for (int i = 0; i < e_rowCount; ++i)
+			{
+				b2BodyDef bd;
+				bd.type = b2_dynamicBody;
+				bd.position.Set(-10.0f + (2.1f * j + 1.0f + 0.01f * i) * radius, (2.0f * i + 1.0f) * radius);
+				b2Body* body = m_world->CreateBody(&bd);
+
+				body->CreateFixture(&fd);
+			}
+		}
+
+		m_world->SetGravity(b2Vec2(0.0f, 0.0f));
+	}
+
+	void CreateCircle()
+	{
+		float radius = 2.0f;
+		b2CircleShape shape;
+		shape.m_p.SetZero();
+		shape.m_radius = radius;
+
+		b2FixtureDef fd;
+		fd.shape = &shape;
+		fd.density = 1.0f;
+		fd.friction = 0.0f;
+
+		b2Vec2 p(RandomFloat(), 3.0f + RandomFloat());
+		b2BodyDef bd;
+		bd.type = b2_dynamicBody;
+		bd.position = p;
+		//bd.allowSleep = false;
+		b2Body* body = m_world->CreateBody(&bd);
+
+		body->CreateFixture(&fd);
+	}
+
+	void Keyboard(int key) override
+	{
+		switch (key)
+		{
+		case GLFW_KEY_C:
+			CreateCircle();
+			break;
+		}
+	}
+
+	void Step(Settings& settings) override
+	{
+		bool sleeping = true;
+		for (b2Body* b = m_world->GetBodyList(); b; b = b->GetNext())
+		{
+			if (b->GetType() != b2_dynamicBody)
+			{
+				continue;
+			}
+
+			if (b->IsAwake())
+			{
+				sleeping = false;
+			}
+		}
+
+		if (m_stepCount == 180)
+		{
+			m_stepCount += 0;
+		}
+
+		//if (sleeping)
+		//{
+		//	CreateCircle();
+		//}
+
+		Test::Step(settings);
+
+		for (b2Body* b = m_world->GetBodyList(); b; b = b->GetNext())
+		{
+			if (b->GetType() != b2_dynamicBody)
+			{
+				continue;
+			}
+
+			b2Vec2 p = b->GetPosition();
+			if (p.x <= -10.0f || 10.0f <= p.x || p.y <= 0.0f || 20.0f <= p.y)
+			{
+				p.x += 0.0f;
+			}
+		}
+
+		g_debugDraw.DrawString(5, m_textLine, "Press 'c' to create a circle.");
+		m_textLine += m_textIncrement;
+	}
+
+	static Test* Create()
+	{
+		return new Confined;
+	}
+};
+
+static int testIndex = RegisterTest("Solver", "Confined", Confined::Create);