mirror of https://github.com/axmolengine/axmol.git
93 lines
3.0 KiB
C++
93 lines
3.0 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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class PulleyJoint : public Test
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{
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public:
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PulleyJoint()
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{
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float y = 16.0f;
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float L = 12.0f;
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float a = 1.0f;
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float b = 2.0f;
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b2Body* ground = NULL;
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{
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b2BodyDef bd;
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ground = m_world->CreateBody(&bd);
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b2CircleShape circle;
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circle.m_radius = 2.0f;
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circle.m_p.Set(-10.0f, y + b + L);
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ground->CreateFixture(&circle, 0.0f);
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circle.m_p.Set(10.0f, y + b + L);
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ground->CreateFixture(&circle, 0.0f);
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}
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{
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b2PolygonShape shape;
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shape.SetAsBox(a, b);
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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(-10.0f, y);
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b2Body* body1 = m_world->CreateBody(&bd);
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body1->CreateFixture(&shape, 5.0f);
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bd.position.Set(10.0f, y);
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b2Body* body2 = m_world->CreateBody(&bd);
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body2->CreateFixture(&shape, 5.0f);
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b2PulleyJointDef pulleyDef;
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b2Vec2 anchor1(-10.0f, y + b);
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b2Vec2 anchor2(10.0f, y + b);
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b2Vec2 groundAnchor1(-10.0f, y + b + L);
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b2Vec2 groundAnchor2(10.0f, y + b + L);
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pulleyDef.Initialize(body1, body2, groundAnchor1, groundAnchor2, anchor1, anchor2, 1.5f);
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m_joint1 = (b2PulleyJoint*)m_world->CreateJoint(&pulleyDef);
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}
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}
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void Step(Settings& settings) override
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{
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Test::Step(settings);
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float ratio = m_joint1->GetRatio();
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float L = m_joint1->GetCurrentLengthA() + ratio * m_joint1->GetCurrentLengthB();
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DrawString(5, m_textLine, "L1 + %4.2f * L2 = %4.2f", (float)ratio, (float)L);
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}
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static Test* Create() { return new PulleyJoint; }
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b2PulleyJoint* m_joint1;
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};
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static int testIndex = RegisterTest("Joints", "Pulley", PulleyJoint::Create);
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