Pyramid.h
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上传日期:2022-01-07
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- /*
- * 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 PYRAMID_H
- #define PYRAMID_H
- class Pyramid : public Test
- {
- public:
- enum
- {
- e_count = 20,
- };
- Pyramid()
- {
- {
- b2BodyDef bd;
- b2Body* ground = m_world->CreateBody(&bd);
- b2PolygonShape shape;
- shape.SetAsEdge(b2Vec2(-40.0f, 0.0f), b2Vec2(40.0f, 0.0f));
- ground->CreateFixture(&shape, 0.0f);
- }
- {
- float32 a = 0.5f;
- b2PolygonShape shape;
- shape.SetAsBox(a, a);
- b2Vec2 x(-7.0f, 0.75f);
- b2Vec2 y;
- b2Vec2 deltaX(0.5625f, 1.25f);
- b2Vec2 deltaY(1.125f, 0.0f);
- for (int32 i = 0; i < e_count; ++i)
- {
- y = x;
- for (int32 j = i; j < e_count; ++j)
- {
- b2BodyDef bd;
- bd.type = b2_dynamicBody;
- bd.position = y;
- b2Body* body = m_world->CreateBody(&bd);
- body->CreateFixture(&shape, 5.0f);
- y += deltaY;
- }
- x += deltaX;
- }
- }
- }
- //void Step(Settings* settings)
- //{
- // // We need higher accuracy for the pyramid.
- // int32 velocityIterations = settings->velocityIterations;
- // int32 positionIterations = settings->positionIterations;
- // settings->velocityIterations = b2Max(8, velocityIterations);
- // settings->positionIterations = b2Max(1, positionIterations);
- // Test::Step(settings);
- // settings->velocityIterations = velocityIterations;
- // settings->positionIterations = positionIterations;
- //}
- static Test* Create()
- {
- return new Pyramid;
- }
- };
- #endif