mirror of https://github.com/axmolengine/axmol.git
104 lines
3.4 KiB
C++
104 lines
3.4 KiB
C++
// MIT License
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// Copyright (c) 2019 Erin Catto
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#include "test.h"
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// A basic slider crank created for GDC tutorial: Understanding Constraints
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class SliderCrank1 : public Test
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{
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public:
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SliderCrank1()
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{
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b2Body* ground = NULL;
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{
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b2BodyDef bd;
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bd.position.Set(0.0f, 17.0f);
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ground = m_world->CreateBody(&bd);
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}
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{
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b2Body* prevBody = ground;
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// Define crank.
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{
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b2PolygonShape shape;
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shape.SetAsBox(4.0f, 1.0f);
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b2BodyDef bd;
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bd.type = b2_dynamicBody;
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bd.position.Set(-8.0f, 20.0f);
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b2Body* body = m_world->CreateBody(&bd);
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body->CreateFixture(&shape, 2.0f);
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b2RevoluteJointDef rjd;
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rjd.Initialize(prevBody, body, b2Vec2(-12.0f, 20.0f));
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m_world->CreateJoint(&rjd);
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prevBody = body;
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}
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// Define connecting rod
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{
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b2PolygonShape shape;
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shape.SetAsBox(8.0f, 1.0f);
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b2BodyDef bd;
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bd.type = b2_dynamicBody;
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bd.position.Set(4.0f, 20.0f);
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b2Body* body = m_world->CreateBody(&bd);
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body->CreateFixture(&shape, 2.0f);
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b2RevoluteJointDef rjd;
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rjd.Initialize(prevBody, body, b2Vec2(-4.0f, 20.0f));
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m_world->CreateJoint(&rjd);
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prevBody = body;
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}
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// Define piston
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{
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b2PolygonShape shape;
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shape.SetAsBox(3.0f, 3.0f);
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b2BodyDef bd;
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bd.type = b2_dynamicBody;
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bd.fixedRotation = true;
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bd.position.Set(12.0f, 20.0f);
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b2Body* body = m_world->CreateBody(&bd);
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body->CreateFixture(&shape, 2.0f);
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b2RevoluteJointDef rjd;
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rjd.Initialize(prevBody, body, b2Vec2(12.0f, 20.0f));
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m_world->CreateJoint(&rjd);
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b2PrismaticJointDef pjd;
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pjd.Initialize(ground, body, b2Vec2(12.0f, 17.0f), b2Vec2(1.0f, 0.0f));
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m_world->CreateJoint(&pjd);
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}
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}
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}
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static Test* Create() { return new SliderCrank1; }
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};
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static int testIndex = RegisterTest("Examples", "Slider Crank 1", SliderCrank1::Create);
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