mirror of https://github.com/axmolengine/axmol.git
108 lines
3.1 KiB
C++
108 lines
3.1 KiB
C++
/*
|
|
* Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
|
|
*
|
|
* 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 PRISMATIC_H
|
|
#define PRISMATIC_H
|
|
|
|
// The motor in this test gets smoother with higher velocity iterations.
|
|
class Prismatic : public Test
|
|
{
|
|
public:
|
|
Prismatic()
|
|
{
|
|
b2Body* ground = NULL;
|
|
{
|
|
b2BodyDef bd;
|
|
ground = m_world->CreateBody(&bd);
|
|
|
|
b2EdgeShape shape;
|
|
shape.Set(b2Vec2(-40.0f, 0.0f), b2Vec2(40.0f, 0.0f));
|
|
ground->CreateFixture(&shape, 0.0f);
|
|
}
|
|
|
|
{
|
|
b2PolygonShape shape;
|
|
shape.SetAsBox(2.0f, 0.5f);
|
|
|
|
b2BodyDef bd;
|
|
bd.type = b2_dynamicBody;
|
|
bd.position.Set(-10.0f, 10.0f);
|
|
bd.angle = 0.5f * b2_pi;
|
|
bd.allowSleep = false;
|
|
b2Body* body = m_world->CreateBody(&bd);
|
|
body->CreateFixture(&shape, 5.0f);
|
|
|
|
b2PrismaticJointDef pjd;
|
|
|
|
// Bouncy limit
|
|
b2Vec2 axis(2.0f, 1.0f);
|
|
axis.Normalize();
|
|
pjd.Initialize(ground, body, b2Vec2(0.0f, 0.0f), axis);
|
|
|
|
// Non-bouncy limit
|
|
//pjd.Initialize(ground, body, b2Vec2(-10.0f, 10.0f), b2Vec2(1.0f, 0.0f));
|
|
|
|
pjd.motorSpeed = 10.0f;
|
|
pjd.maxMotorForce = 10000.0f;
|
|
pjd.enableMotor = true;
|
|
pjd.lowerTranslation = 0.0f;
|
|
pjd.upperTranslation = 20.0f;
|
|
pjd.enableLimit = true;
|
|
|
|
m_joint = (b2PrismaticJoint*)m_world->CreateJoint(&pjd);
|
|
}
|
|
}
|
|
|
|
void Keyboard(unsigned char key)
|
|
{
|
|
switch (key)
|
|
{
|
|
case 'l':
|
|
m_joint->EnableLimit(!m_joint->IsLimitEnabled());
|
|
break;
|
|
|
|
case 'm':
|
|
m_joint->EnableMotor(!m_joint->IsMotorEnabled());
|
|
break;
|
|
|
|
case 's':
|
|
m_joint->SetMotorSpeed(-m_joint->GetMotorSpeed());
|
|
break;
|
|
}
|
|
}
|
|
|
|
void Step(Settings* settings)
|
|
{
|
|
Test::Step(settings);
|
|
m_debugDraw.DrawString(5, m_textLine, "Keys: (l) limits, (m) motors, (s) speed");
|
|
m_textLine += 15;
|
|
float32 force = m_joint->GetMotorForce(settings->hz);
|
|
m_debugDraw.DrawString(5, m_textLine, "Motor Force = %4.0f", (float) force);
|
|
m_textLine += 15;
|
|
}
|
|
|
|
static Test* Create()
|
|
{
|
|
return new Prismatic;
|
|
}
|
|
|
|
b2PrismaticJoint* m_joint;
|
|
};
|
|
|
|
#endif
|