Add benchmark test (#744)

lots of confined boxes

testbed/CMakeLists.txt

@@ -10,6 +10,7 @@ set (TESTBED_SOURCE_FILES
 	settings.cpp
 	test.cpp
 	test.h
+	tests/benchmark_boxes.cpp
 	tests/add_pair.cpp
 	tests/apply_force.cpp
 	tests/body_types.cpp

testbed/tests/benchmark_boxes.cpp

@@ -0,0 +1,100 @@
+// 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 Boxes : public Test
+{
+public:
+	Boxes()
+	{
+		float groundSize = 25.0f;
+
+		{
+			b2BodyDef bd;
+			b2Body* ground = m_world->CreateBody(&bd);
+
+			b2PolygonShape box;
+			box.SetAsBox(groundSize, 1.2f);
+			b2FixtureDef sd;
+			sd.shape = &box;
+			ground->CreateFixture(&sd);
+
+			bd.angle = 0.5f * b2_pi;
+			bd.position = { groundSize, 2.0f * groundSize };
+			ground = m_world->CreateBody(&bd);
+
+			box.SetAsBox(2.0f * groundSize, 1.2f);
+			ground->CreateFixture(&sd);
+
+			bd.position = { -groundSize, 2.0f * groundSize };
+			ground = m_world->CreateBody(&bd);
+			ground->CreateFixture(&sd);
+		}
+
+		int32_t num = 26;
+		float rad = 0.5f;
+
+		float shift = rad * 2.0f;
+		float centerx = shift * num / 2.0f;
+		float centery = shift / 2.0f;
+
+		b2BodyDef bd;
+		bd.type = b2_dynamicBody;
+
+		b2FixtureDef sd;
+		sd.density = 1.0f;
+		sd.friction = 0.5f;
+
+		b2PolygonShape cuboid;
+		cuboid.SetAsBox(0.5f, 0.5f);
+		sd.shape = &cuboid;
+
+#ifdef _DEBUG
+		int32_t numj = 5;
+#else
+		int32_t numj = 5 * num;
+#endif
+
+		for (int32_t i = 0; i < num; ++i)
+		{
+			float x = i * shift - centerx;
+
+			for (int32_t j = 0; j < numj; ++j)
+			{
+				float y = j * shift + centery + 2.0f;
+
+				bd.position = { x, y };
+
+				b2Body* rigidBody = m_world->CreateBody(&bd);
+				rigidBody->CreateFixture(&sd);
+			}
+		}
+	}
+
+	static Test* Create()
+	{
+		return new Boxes;
+	}
+};
+
+static int testIndex = RegisterTest("Benchmark", "Boxes", Boxes::Create);