125 lines
2.7 KiB
C++
125 lines
2.7 KiB
C++
/*
|
|
* Copyright (c) 2016-2019 Irlan Robson https://irlanrobson.github.io
|
|
*
|
|
* 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 NEWTON_CRADLE_H
|
|
#define NEWTON_CRADLE_H
|
|
|
|
class NewtonCradle : public Test
|
|
{
|
|
public:
|
|
NewtonCradle()
|
|
{
|
|
{
|
|
b3BodyDef bd;
|
|
b3Body* ground = m_world.CreateBody(bd);
|
|
|
|
b3HullShape hs;
|
|
hs.m_hull = &m_groundHull;
|
|
|
|
b3ShapeDef sd;
|
|
sd.shape = &hs;
|
|
|
|
ground->CreateShape(sd);
|
|
}
|
|
|
|
b3CapsuleShape edge;
|
|
edge.m_centers[0].Set(0.0f, -10.0f, 0.0f);
|
|
edge.m_centers[1].Set(0.0f, 10.0f, 0.0f);
|
|
edge.m_radius = 0.5f;
|
|
|
|
b3Body* frame1, *frame2;
|
|
|
|
{
|
|
b3BodyDef bd;
|
|
bd.orientation = b3Quat(b3Vec3(0.0f, 0.0f, 1.0f), 0.5f * B3_PI);
|
|
bd.position.Set(0.0f, 10.0f, -5.0f);
|
|
|
|
frame1 = m_world.CreateBody(bd);
|
|
|
|
b3ShapeDef sd;
|
|
sd.shape = &edge;
|
|
|
|
frame1->CreateShape(sd);
|
|
}
|
|
|
|
{
|
|
b3BodyDef bd;
|
|
bd.orientation = b3Quat(b3Vec3(0.0f, 0.0f, 1.0f), 0.5f * B3_PI);
|
|
bd.position.Set(0.0f, 10.0f, 5.0f);
|
|
|
|
frame2 = m_world.CreateBody(bd);
|
|
|
|
b3ShapeDef sd;
|
|
sd.shape = &edge;
|
|
|
|
frame2->CreateShape(sd);
|
|
}
|
|
|
|
b3Vec3 center;
|
|
center.Set(-5.0f, 4.0f, 0.0f);
|
|
|
|
b3SphereShape vertex;
|
|
vertex.m_center.SetZero();
|
|
vertex.m_radius = 1.0f;
|
|
|
|
u32 count = 6;
|
|
for (u32 i = 0; i < count; ++i)
|
|
{
|
|
b3BodyDef bd;
|
|
bd.type = e_dynamicBody;
|
|
bd.position = center;
|
|
if (i == count - 1)
|
|
{
|
|
bd.linearVelocity.x = 5.0f;
|
|
}
|
|
|
|
b3Body* ball = m_world.CreateBody(bd);
|
|
|
|
b3ShapeDef sd;
|
|
sd.shape = &vertex;
|
|
sd.density = 1.0f;
|
|
sd.friction = 0.8f;
|
|
|
|
ball->CreateShape(sd);
|
|
|
|
b3Vec3 c1;
|
|
c1.x = center.x;
|
|
c1.y = 10.0f;
|
|
c1.z = 0.0f;
|
|
|
|
b3SphereJointDef jd1;
|
|
jd1.bodyA = frame1;
|
|
jd1.collideLinked = true;
|
|
jd1.bodyB = ball;
|
|
jd1.localAnchorA = b3MulT(frame1->GetTransform(), c1);
|
|
jd1.localAnchorB = b3MulT(ball->GetTransform(), c1);
|
|
|
|
m_world.CreateJoint(jd1);
|
|
|
|
center.x += 2.0f * vertex.m_radius;
|
|
}
|
|
}
|
|
|
|
static Test* Create()
|
|
{
|
|
return new NewtonCradle();
|
|
}
|
|
};
|
|
|
|
#endif
|