git subrepo clone --branch=sono6good https://github.com/essej/JUCE.git deps/juce

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"

deps/juce/examples/Assets/Box2DTests/RopeJoint.h

@@ -0,0 +1,145 @@
+/*
+* Copyright (c) 2006-2010 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 ROPE_JOINT_H
+#define ROPE_JOINT_H
+
+/// This test shows how a rope joint can be used to stabilize a chain of
+/// bodies with a heavy payload. Notice that the rope joint just prevents
+/// excessive stretching and has no other effect.
+/// By disabling the rope joint you can see that the Box2D solver has trouble
+/// supporting heavy bodies with light bodies. Try playing around with the
+/// densities, time step, and iterations to see how they affect stability.
+/// This test also shows how to use contact filtering. Filtering is configured
+/// so that the payload does not collide with the chain.
+class RopeJoint : public Test
+{
+public:
+    RopeJoint()
+    {
+        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(0.5f, 0.125f);
+
+            b2FixtureDef fd;
+            fd.shape = &shape;
+            fd.density = 20.0f;
+            fd.friction = 0.2f;
+            fd.filter.categoryBits = 0x0001;
+            fd.filter.maskBits = 0xFFFF & ~0x0002;
+
+            b2RevoluteJointDef jd;
+            jd.collideConnected = false;
+
+            const int32 N = 10;
+            const float32 y = 15.0f;
+            m_ropeDef.localAnchorA.Set(0.0f, y);
+
+            b2Body* prevBody = ground;
+            for (int32 i = 0; i < N; ++i)
+            {
+                b2BodyDef bd;
+                bd.type = b2_dynamicBody;
+                bd.position.Set(0.5f + 1.0f * i, y);
+                if (i == N - 1)
+                {
+                    shape.SetAsBox(1.5f, 1.5f);
+                    fd.density = 100.0f;
+                    fd.filter.categoryBits = 0x0002;
+                    bd.position.Set(1.0f * i, y);
+                    bd.angularDamping = 0.4f;
+                }
+
+                b2Body* body = m_world->CreateBody(&bd);
+
+                body->CreateFixture(&fd);
+
+                b2Vec2 anchor(float32(i), y);
+                jd.Initialize(prevBody, body, anchor);
+                m_world->CreateJoint(&jd);
+
+                prevBody = body;
+            }
+
+            m_ropeDef.localAnchorB.SetZero();
+
+            float32 extraLength = 0.01f;
+            m_ropeDef.maxLength = N - 1.0f + extraLength;
+            m_ropeDef.bodyB = prevBody;
+        }
+
+        {
+            m_ropeDef.bodyA = ground;
+            m_rope = m_world->CreateJoint(&m_ropeDef);
+        }
+    }
+
+    void Keyboard(unsigned char key)
+    {
+        switch (key)
+        {
+        case 'j':
+            if (m_rope)
+            {
+                m_world->DestroyJoint(m_rope);
+                m_rope = NULL;
+            }
+            else
+            {
+                m_rope = m_world->CreateJoint(&m_ropeDef);
+            }
+            break;
+        }
+    }
+
+    void Step(Settings* settings)
+    {
+        Test::Step(settings);
+        m_debugDraw.DrawString(5, m_textLine, "Press (j) to toggle the rope joint.");
+        m_textLine += 15;
+        if (m_rope)
+        {
+            m_debugDraw.DrawString(5, m_textLine, "Rope ON");
+        }
+        else
+        {
+            m_debugDraw.DrawString(5, m_textLine, "Rope OFF");
+        }
+        m_textLine += 15;
+    }
+
+    static Test* Create()
+    {
+        return new RopeJoint;
+    }
+
+    b2RopeJointDef m_ropeDef;
+    b2Joint* m_rope;
+};
+
+#endif