Confined.h
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上传日期:2022-01-07
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- /*
- * Copyright (c) 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 CONFINED_H
- #define CONFINED_H
- class Confined : public Test
- {
- public:
- enum
- {
- e_columnCount = 0,
- e_rowCount = 0
- };
- Confined()
- {
- {
- b2BodyDef bd;
- b2Body* ground = m_world->CreateBody(&bd);
- b2PolygonShape shape;
- // Floor
- shape.SetAsEdge(b2Vec2(-10.0f, 0.0f), b2Vec2(10.0f, 0.0f));
- ground->CreateFixture(&shape, 0.0f);
- // Left wall
- shape.SetAsEdge(b2Vec2(-10.0f, 0.0f), b2Vec2(-10.0f, 20.0f));
- ground->CreateFixture(&shape, 0.0f);
- // Right wall
- shape.SetAsEdge(b2Vec2(10.0f, 0.0f), b2Vec2(10.0f, 20.0f));
- ground->CreateFixture(&shape, 0.0f);
- // Roof
- shape.SetAsEdge(b2Vec2(-10.0f, 20.0f), b2Vec2(10.0f, 20.0f));
- ground->CreateFixture(&shape, 0.0f);
- }
- float32 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()
- {
- float32 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(unsigned char key)
- {
- switch (key)
- {
- case 'c':
- CreateCircle();
- break;
- }
- }
- void Step(Settings* settings)
- {
- 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 += 0.0;
- }
- }
- m_debugDraw.DrawString(5, m_textLine, "Press 'c' to create a circle.");
- m_textLine += 15;
- }
- static Test* Create()
- {
- return new Confined;
- }
- };
- #endif