25bd5d8adb
subrepo: subdir: "deps/juce" merged: "b13f9084e" upstream: origin: "https://github.com/essej/JUCE.git" branch: "sono6good" commit: "b13f9084e" git-subrepo: version: "0.4.3" origin: "https://github.com/ingydotnet/git-subrepo.git" commit: "2f68596"
116 lines
2.0 KiB
C++
116 lines
2.0 KiB
C++
/*
|
|
* Copyright (c) 2011 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 B2_ROPE_H
|
|
#define B2_ROPE_H
|
|
|
|
#include "../Common/b2Math.h"
|
|
|
|
class b2Draw;
|
|
|
|
///
|
|
struct b2RopeDef
|
|
{
|
|
b2RopeDef()
|
|
{
|
|
vertices = NULL;
|
|
count = 0;
|
|
masses = NULL;
|
|
gravity.SetZero();
|
|
damping = 0.1f;
|
|
k2 = 0.9f;
|
|
k3 = 0.1f;
|
|
}
|
|
|
|
///
|
|
b2Vec2* vertices;
|
|
|
|
///
|
|
int32 count;
|
|
|
|
///
|
|
float32* masses;
|
|
|
|
///
|
|
b2Vec2 gravity;
|
|
|
|
///
|
|
float32 damping;
|
|
|
|
/// Stretching stiffness
|
|
float32 k2;
|
|
|
|
/// Bending stiffness. Values above 0.5 can make the simulation blow up.
|
|
float32 k3;
|
|
};
|
|
|
|
///
|
|
class b2Rope
|
|
{
|
|
public:
|
|
b2Rope();
|
|
~b2Rope();
|
|
|
|
///
|
|
void Initialize(const b2RopeDef* def);
|
|
|
|
///
|
|
void Step(float32 timeStep, int32 iterations);
|
|
|
|
///
|
|
int32 GetVertexCount() const
|
|
{
|
|
return m_count;
|
|
}
|
|
|
|
///
|
|
const b2Vec2* GetVertices() const
|
|
{
|
|
return m_ps;
|
|
}
|
|
|
|
///
|
|
void Draw(b2Draw* draw) const;
|
|
|
|
///
|
|
void SetAngle(float32 angle);
|
|
|
|
private:
|
|
|
|
void SolveC2();
|
|
void SolveC3();
|
|
|
|
int32 m_count;
|
|
b2Vec2* m_ps;
|
|
b2Vec2* m_p0s;
|
|
b2Vec2* m_vs;
|
|
|
|
float32* m_ims;
|
|
|
|
float32* m_Ls;
|
|
float32* m_as;
|
|
|
|
b2Vec2 m_gravity;
|
|
float32 m_damping;
|
|
|
|
float32 m_k2;
|
|
float32 m_k3;
|
|
};
|
|
|
|
#endif
|