add hello world example and edit source tree

examples/testbed/tests/varying_friction.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 VARYING_FRICTION_H
+#define VARYING_FRICTION_H
+
+class VaryingFriction : public Test
+{
+public:
+	VaryingFriction()
+	{
+		g_camera.m_zoom = 200.0f;
+		g_camera.m_q = b3Quat(b3Vec3(1.0f, 0.0f, 0.0f), -0.1f * B3_PI);
+		g_camera.m_q = b3Quat(b3Vec3(0.0f, 1.0f, 0.0f), -0.1f * B3_PI) * g_camera.m_q;
+
+		{
+			b3BodyDef bdef;	
+			b3Body* ground = m_world.CreateBody(bdef);
+
+			b3HullShape hs;
+			hs.m_hull = &m_groundHull;
+
+			b3ShapeDef sdef;
+			sdef.shape = &hs;
+			ground->CreateShape(sdef);
+		}
+
+		{
+			b3BodyDef bdef;
+			bdef.position.Set(-20.0f, 20.0f, 0.0f);
+			bdef.orientation = b3Quat(b3Vec3(0.0f, 0.0f, 1.0f), -0.1f * B3_PI);
+
+			b3Body* ramp = m_world.CreateBody(bdef);
+
+			b3HullShape hs;
+			hs.m_hull = &m_rampHull;
+
+			b3ShapeDef sdef;
+			sdef.shape = &hs;
+			sdef.friction = 0.4f;
+			ramp->CreateShape(sdef);
+		}
+
+		{
+			b3BodyDef bdef;
+			bdef.position.Set(20.0f, 30.0f, 0.0f);
+			bdef.orientation = b3Quat(b3Vec3(0.0f, 0.0f, 1.0f), 0.1f * B3_PI);
+
+			b3Body* ramp = m_world.CreateBody(bdef);
+
+			b3HullShape hs;
+			hs.m_hull = &m_rampHull;
+
+			b3ShapeDef sdef;
+			sdef.shape = &hs;
+			sdef.friction = 0.3f;
+			ramp->CreateShape(sdef);
+		}
+
+		{
+			b3BodyDef bdef;
+			bdef.position.Set(-20.0f, 40.0f, 0.0f);
+			bdef.orientation = b3Quat(b3Vec3(0.0f, 0.0f, 1.0f), -0.1f * B3_PI);
+
+			b3Body* ramp = m_world.CreateBody(bdef);
+
+			b3HullShape hs;
+			hs.m_hull = &m_rampHull;
+
+			b3ShapeDef sdef;
+			sdef.shape = &hs;
+			sdef.friction = 0.2f;
+			ramp->CreateShape(sdef);
+		}
+
+		{
+			b3BodyDef bdef;
+			bdef.position.Set(20.0f, 50.0f, 0.0f);
+			bdef.orientation = b3Quat(b3Vec3(0.0f, 0.0f, 1.0f), 0.1f * B3_PI);
+
+			b3Body* ramp = m_world.CreateBody(bdef);
+
+			b3HullShape hs;
+			hs.m_hull = &m_rampHull;
+
+			b3ShapeDef sdef;
+			sdef.shape = &hs;
+			sdef.friction = 0.1f;
+			ramp->CreateShape(sdef);
+		}
+
+		{
+			b3BodyDef bd;
+			bd.type = b3BodyType::e_dynamicBody;
+			bd.position.Set(40.0f, 70.0f, -10.0f);
+			b3Body* body = m_world.CreateBody(bd);
+
+			b3HullShape hs;
+			hs.m_hull = &m_boxHull;
+
+			b3ShapeDef sdef;
+			sdef.density = 1.0f;
+			sdef.friction = 0.2f;
+			sdef.shape = &hs;
+
+			body->CreateShape(sdef);
+		}
+
+		{
+			b3BodyDef bd;
+			bd.type = b3BodyType::e_dynamicBody;
+			bd.position.Set(40.0f, 70.0f, 0.0f);
+			b3Body* body = m_world.CreateBody(bd);
+
+			b3HullShape hs;
+			hs.m_hull = &m_boxHull;
+
+			b3ShapeDef sdef;
+			sdef.density = 1.0f;
+			sdef.friction = 0.5f;
+			sdef.shape = &hs;
+
+			body->CreateShape(sdef);
+		}
+
+		{
+			b3BodyDef bd;
+			bd.type = b3BodyType::e_dynamicBody;
+			bd.position.Set(40.0f, 70.0f, 10.0f);
+			b3Body* body = m_world.CreateBody(bd);
+
+			b3HullShape hs;
+			hs.m_hull = &m_boxHull;
+
+			b3ShapeDef sdef;
+			sdef.density = 1.0f;
+			sdef.friction = 0.8f;
+			sdef.shape = &hs;
+
+			body->CreateShape(sdef);
+		}
+	}
+
+	static Test* Create()
+	{
+		return new VaryingFriction();
+	}
+};
+
+#endif