add hello world example and edit source tree

examples/testbed/tests/sensor_test.h

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+/*
+* Copyright (c) 2016-2016 Irlan Robson http://www.irlan.net
+*
+* This software is provided 'as-is', without any express or implied
+* warranty.  In no event will the authors be held liable for any damages
+* arising from the use of this software.
+* Permission is granted to anyone to use this software for any purpose,
+* including commercial applications, and to alter it and redistribute it
+* freely, subject to the following restrictions:
+* 1. The origin of this software must not be misrepresented; you must not
+* claim that you wrote the original software. If you use this software
+* in a product, an acknowledgment in the product documentation would be
+* appreciated but is not required.
+* 2. Altered source versions must be plainly marked as such, and must not be
+* misrepresented as being the original software.
+* 3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef SENSOR_TEST_H
+#define SENSOR_TEST_H
+
+class SensorTest : public Test
+{
+public:
+	SensorTest()
+	{
+		{
+			b3BodyDef bd;
+			b3Body* ground = m_world.CreateBody(bd);
+
+			b3HullShape hs;
+			hs.m_hull = &m_groundHull;
+
+			b3ShapeDef sd;
+			sd.shape = &hs;
+
+			ground->CreateShape(sd);
+		}
+
+		{
+			b3BodyDef bd;
+			bd.position.Set(0.0f, 6.0f, 0.0f);
+			
+			b3Body* body = m_world.CreateBody(bd);
+
+			b3HullShape hs;
+			hs.m_hull = &m_tallHull;
+
+			b3ShapeDef sd;
+			sd.shape = &hs;
+			sd.isSensor = true;
+			m_sensor = body->CreateShape(sd);
+		}
+
+		{
+			b3BodyDef bd;
+			bd.type = b3BodyType::e_dynamicBody;
+			bd.position.Set(0.0f, 4.0f, 10.0f);
+			bd.linearVelocity.Set(0.0f, 0.0f, -5.0f);
+
+			m_character = m_world.CreateBody(bd);
+
+			b3CapsuleShape cap;
+			cap.m_centers[0].Set(0.0f, 2.0f, 0.0f);
+			cap.m_centers[1].Set(0.0f, -2.0f, 0.0f);
+			cap.m_radius = 0.5f;
+
+			b3ShapeDef sd;
+			sd.shape = ∩
+			sd.density = 1.5f;
+			sd.friction = 0.7f;
+
+			m_character->CreateShape(sd);
+		}
+
+		m_attack = false;
+	}
+
+	void BeginContact(b3Contact* c)
+	{
+		b3Shape* sA = c->GetShapeA();
+		b3Body* bA = sA->GetBody();
+		b3Shape* sB = c->GetShapeB();
+		b3Body* bB = sB->GetBody();
+
+		if (sA == m_sensor)
+		{
+			if (bB == m_character)
+			{
+				m_attack = true;
+			}
+		}
+
+		if (sB == m_sensor)
+		{
+			if (bA == m_character)
+			{
+				m_attack = true;
+			}
+		}
+
+	}
+
+	void EndContact(b3Contact* c)
+	{
+		b3Shape* sA = c->GetShapeA();
+		b3Body* bA = sA->GetBody();
+		b3Shape* sB = c->GetShapeB();
+		b3Body* bB = sB->GetBody();
+
+		if (sA == m_sensor)
+		{
+		}
+
+		if (sB == m_sensor)
+		{
+		}
+	}
+
+	void Step()
+	{
+		if (m_attack)
+		{
+			b3Body* sensorBody = m_sensor->GetBody();
+
+			b3BodyDef bd;
+			bd.type = b3BodyType::e_dynamicBody;
+			bd.position.Set(RandomFloat(-20.0f, 20.0f), RandomFloat(10.0f, 20.0f), RandomFloat(-20.0f, 20.0f));
+
+			b3Vec3 n = m_character->GetTransform().position - bd.position;
+			n.Normalize();
+
+			bd.linearVelocity = 60.0f * n;
+
+			b3Body* enemy = m_world.CreateBody(bd);
+
+			b3SphereShape shape;
+			shape.m_center.Set(0.0f, 0.0f, 0.0f);
+			shape.m_radius = 0.5f;
+
+			b3ShapeDef sd;
+			sd.shape = &shape;
+			sd.density = 1.0f;
+			sd.friction = 1.0f;
+
+			enemy->CreateShape(sd);
+			
+			m_attack = false;
+		}
+
+		Test::Step();
+	}
+
+	static Test* Create()
+	{
+		return new SensorTest();
+	}
+	
+	b3Body* m_character;
+	b3Shape* m_sensor;
+	bool m_attack;
+};
+
+#endif