text: /*
  * Copyright (c) 2006-2009 Erin Catto http://www.gphysics.com
  *
  * 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 DYNAMIC_EDGES_H
  #define DYNAMIC_EDGES_H
  
  class DynamicEdges : public Test
  {
  public:
  	DynamicEdges()
  	{
  		{
  			b2BodyDef bd;
  			bd.position.Set(0.0f, -10.0f);
  			b2Body* body = m_world->CreateBody(&bd);
  
  			b2PolygonDef sd;
  			sd.SetAsBox(50.0f, 10.0f);
  			body->CreateFixture(&sd);
  		}
  
  		{
  			b2CircleDef sd1;
  			sd1.radius = 0.5f;
  			sd1.localPosition.Set(-0.5f, 0.5f);
  			sd1.density = 2.0f;
  
  			b2CircleDef sd2;
  			sd2.radius = 0.5f;
  			sd2.localPosition.Set(0.5f, 0.5f);
  			sd2.density = 0.0f; // massless
  
  			for (int i = 0; i < 10; ++i)
  			{
  				float32 x = RandomFloat(-0.1f, 0.1f);
  				b2BodyDef bd;
  				bd.position.Set(x + 5.0f, 1.05f + 2.5f * i);
  				bd.angle = RandomFloat(-b2_pi, b2_pi);
  				b2Body* body = m_world->CreateBody(&bd);
  				body->CreateFixture(&sd1);
  				body->CreateFixture(&sd2);
  				body->SetMassFromShapes();
  			}
  		}
  
  		{
  			b2PolygonDef sd1;
  			sd1.SetAsBox(0.25f, 0.5f);
  			sd1.density = 2.0f;
  
  			b2PolygonDef sd2;
  			sd2.SetAsBox(0.25f, 0.5f, b2Vec2(0.0f, -0.5f), 0.5f * b2_pi);
  			sd2.density = 2.0f;
  
  			for (int i = 0; i < 10; ++i)
  			{
  				float32 x = RandomFloat(-0.1f, 0.1f);
  				b2BodyDef bd;
  				bd.position.Set(x - 5.0f, 1.05f + 2.5f * i);
  				bd.angle = RandomFloat(-b2_pi, b2_pi);
  				b2Body* body = m_world->CreateBody(&bd);
  				body->CreateFixture(&sd1);
  				body->CreateFixture(&sd2);
  				body->SetMassFromShapes();
  			}
  		}
  
  		{
  			b2XForm xf1;
  			xf1.R.Set(0.3524f * b2_pi);
  			xf1.position = b2Mul(xf1.R, b2Vec2(1.0f, 0.0f));
  
  			b2PolygonDef sd1;
  			sd1.vertexCount = 3;
  			sd1.vertices[0] = b2Mul(xf1, b2Vec2(-1.0f, 0.0f));
  			sd1.vertices[1] = b2Mul(xf1, b2Vec2(1.0f, 0.0f));
  			sd1.vertices[2] = b2Mul(xf1, b2Vec2(0.0f, 0.5f));
  			sd1.density = 2.0f;
  
  			b2XForm xf2;
  			xf2.R.Set(-0.3524f * b2_pi);
  			xf2.position = b2Mul(xf2.R, b2Vec2(-1.0f, 0.0f));
  
  			b2PolygonDef sd2;
  			sd2.vertexCount = 3;
  			sd2.vertices[0] = b2Mul(xf2, b2Vec2(-1.0f, 0.0f));
  			sd2.vertices[1] = b2Mul(xf2, b2Vec2(1.0f, 0.0f));
  			sd2.vertices[2] = b2Mul(xf2, b2Vec2(0.0f, 0.5f));
  			sd2.density = 2.0f;
  
  			for (int32 i = 0; i < 10; ++i)
  			{
  				float32 x = RandomFloat(-0.1f, 0.1f);
  				b2BodyDef bd;
  				bd.position.Set(x, 2.05f + 2.5f * i);
  				bd.angle = 0.0f;
  				b2Body* body = m_world->CreateBody(&bd);
  				body->CreateFixture(&sd1);
  				body->CreateFixture(&sd2);
  				body->SetMassFromShapes();
  			}
  		}
  
  		{
  			b2PolygonDef sd_bottom;
  			sd_bottom.SetAsBox( 1.5f, 0.15f );
  			sd_bottom.density = 4.0f;
  
  			b2PolygonDef sd_left;
  			sd_left.SetAsBox(0.15f, 2.7f, b2Vec2(-1.45f, 2.35f), 0.2f);
  			sd_left.density = 4.0f;
  
  			b2PolygonDef sd_right;
  			sd_right.SetAsBox(0.15f, 2.7f, b2Vec2(1.45f, 2.35f), -0.2f);
  			sd_right.density = 4.0f;
  
  			b2BodyDef bd;
  			bd.position.Set( 0.0f, 2.0f );
  			b2Body* body = m_world->CreateBody(&bd);
  			body->CreateFixture(&sd_bottom);
  			body->CreateFixture(&sd_left);
  			body->CreateFixture(&sd_right);
  			body->SetMassFromShapes();
  		}
  		
  		{
  			float32 loop1[] = 
  			{
  				0.063134534f,8.3695248f,
  				0.94701801f,9.3165428f,
  				0.0f,9.0640047f,
  				-0.12626907f,10.326695f,
  				1.4520943f,11.77879f,
  				2.2728432f,10.137292f,
  				2.3991123f,11.147444f,
  				3.5986685f,10.958041f,
  				3.9143411f,7.3593722f,
  				4.1668793f,9.4428119f,
  				5.4295699f,9.3165428f,
  				6.2503189f,8.3063903f,
  				6.6922606f,10.137292f,
  				4.9876282f,9.8216191f,
  				4.7350901f,10.958041f,
  				7.2604714f,11.652521f,
  				10.732871f,11.147444f,
  				10.480333f,10.642368f,
  				10.732871f,9.8216191f,
  				11.55362f,9.4428119f,
  				12.374369f,9.3796773f,
  				13.005714f,9.8216191f,
  				13.195118f,10.38983f,
  				13.005714f,10.768637f,
  				12.626907f,10.894906f,
  				12.753176f,11.526252f,
  				13.573925f,11.715655f,
  				14.836616f,11.399982f,
  				16.351844f,10.768637f,
  				17.867073f,11.399982f,
  				17.803939f,10.263561f,
  				17.361997f,8.3063903f,
  				17.803939f,8.1801212f,
  				18.056477f,9.5059464f,
  				18.182746f,11.336848f,
  				18.561553f,11.210579f,
  				18.561553f,9.6322155f,
  				18.561553f,7.7381795f,
  				18.687822f,5.5284708f,
  				19.382302f,5.6547398f,
  				19.066629f,8.1801212f,
  				19.003495f,10.263561f,
  				19.066629f,11.463117f,
  				19.887378f,11.841924f,
  				20.708127f,11.273713f,
  				21.0238f,10.011023f,
  				20.708127f,7.2962377f,
  				21.086934f,6.2860852f,
  				21.150069f,3.7607038f,
  				20.392455f,2.5611476f,
  				18.624688f,2.5611476f,
  				20.771262f,2.1192059f,
  				20.771262f,0.22516988f,
  				18.624688f,-0.2799064f,
  				13.826463f,0.16203534f,
  				14.015867f,1.7403987f,
  				13.195118f,2.1823404f,
  				12.626907f,1.5509951f,
  				12.879445f,0.85651522f,
  				12.626907f,0.35143895f,
  				10.543467f,1.298457f,
  				11.490485f,3.9501074f,
  				13.889598f,3.6344347f,
  				13.889598f,2.9399549f,
  				14.584077f,3.8869729f,
  				11.932427f,5.2127981f,
  				9.7227183f,4.0132419f,
  				10.796005f,3.5081657f,
  				9.7858528f,3.2556275f,
  				10.796005f,2.4980131f,
  				7.9549513f,1.7403987f,
  				9.6595837f,1.424726f,
  				9.217642f,0.66711162f,
  				8.270624f,-0.090502792f,
  				7.0079333f,0.85651522f,
  				6.1240498f,-0.15363733f,
  				6.1240498f,3.192493f,
  				5.6821081f,2.4348786f,
  				4.9876282f,2.1192059f,
  				4.1037447f,1.8666678f,
  				3.0304576f,1.8666678f,
  				2.0834396f,2.245475f,
  				1.6414979f,2.6242822f,
  				1.3258252f,3.5081657f,
  				1.2626907f,0.47770802f,
  				0.63134534f,0.035766276f,
  				0.063134534f,0.98278429f
  			};
  			
  			float32 loop2[] = 
  			{
  				8.270624f,6.1598161f,
  				8.270624f,5.3390672f,
  				8.7757003f,5.086529f,
  				9.4701801f,5.5284708f,
  				9.217642f,6.033547f,
  				8.7757003f,6.4123542f
  			};
  			
  			b2Vec2 b2Loop1[87];
  			b2Vec2 b2Loop2[6];
  			
  			for (int32 i = 86; i >= 0; i--) {
  				b2Loop1[86 - i].Set(loop1[i*2] + 10.0f, loop1[i*2 + 1] + 1.0f);
  			}
  			/*for (int32 i = 0; i < 87; i++) {
  				b2Loop1[i].Set(loop1[i*2] + 10.0f, loop1[i*2 + 1] + 1.0f);
  			}*/
  			
  			for (int32 i = 0; i < 6; i++) {
  				b2Loop2[i].Set(loop2[i*2], loop2[i*2 + 1]);
  			}
  			
  			b2BodyDef bd;
  			bd.position.Set( 0.0f, 0.0f );
  			b2Body* body = m_world->CreateBody(&bd);
  			
  			b2CircleDef weight;
  			weight.filter.maskBits = 0x0000;
  			weight.density = 4.0f;
  			weight.radius = 0.5f;
  			weight.localPosition.Set(8.9f, 5.75f);
  			body->CreateFixture(&weight);
  			
  			b2EdgeChainDef edgeDef;
  			edgeDef.vertexCount = 6;
  			edgeDef.vertices = b2Loop2;
  			b2CreateEdgeChain(body, &edgeDef);
  			
  			body->SetMassFromShapes();
  	
  			body = m_world->CreateBody(&bd);
  			weight.radius = 5.0f;
  			weight.localPosition.Set(20.5f, 7.0f);
  			body->CreateFixture(&weight);
  			
  			edgeDef.vertexCount = 87;
  			edgeDef.vertices = b2Loop1;
  			b2CreateEdgeChain(body, &edgeDef);
  			
  			body->SetMassFromShapes();
  		}
  	}
  
  	static Test* Create()
  	{
  		return new DynamicEdges;
  	}
  };
  
  #endif
  
  
  
  
  
  
  
  