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/ApplyForce.h

@@ -0,0 +1,183 @@
+/*
+* 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 APPLY_FORCE_H
+#define APPLY_FORCE_H
+
+class ApplyForce : public Test
+{
+public:
+    ApplyForce()
+    {
+        m_world->SetGravity(b2Vec2(0.0f, 0.0f));
+
+        const float32 k_restitution = 0.4f;
+
+        b2Body* ground;
+        {
+            b2BodyDef bd;
+            bd.position.Set(0.0f, 20.0f);
+            ground = m_world->CreateBody(&bd);
+
+            b2EdgeShape shape;
+
+            b2FixtureDef sd;
+            sd.shape = &shape;
+            sd.density = 0.0f;
+            sd.restitution = k_restitution;
+
+            // Left vertical
+            shape.Set(b2Vec2(-20.0f, -20.0f), b2Vec2(-20.0f, 20.0f));
+            ground->CreateFixture(&sd);
+
+            // Right vertical
+            shape.Set(b2Vec2(20.0f, -20.0f), b2Vec2(20.0f, 20.0f));
+            ground->CreateFixture(&sd);
+
+            // Top horizontal
+            shape.Set(b2Vec2(-20.0f, 20.0f), b2Vec2(20.0f, 20.0f));
+            ground->CreateFixture(&sd);
+
+            // Bottom horizontal
+            shape.Set(b2Vec2(-20.0f, -20.0f), b2Vec2(20.0f, -20.0f));
+            ground->CreateFixture(&sd);
+        }
+
+        {
+            b2Transform xf1;
+            xf1.q.Set(0.3524f * b2_pi);
+            xf1.p = xf1.q.GetXAxis();
+
+            b2Vec2 vertices[3];
+            vertices[0] = b2Mul(xf1, b2Vec2(-1.0f, 0.0f));
+            vertices[1] = b2Mul(xf1, b2Vec2(1.0f, 0.0f));
+            vertices[2] = b2Mul(xf1, b2Vec2(0.0f, 0.5f));
+
+            b2PolygonShape poly1;
+            poly1.Set(vertices, 3);
+
+            b2FixtureDef sd1;
+            sd1.shape = &poly1;
+            sd1.density = 4.0f;
+
+            b2Transform xf2;
+            xf2.q.Set(-0.3524f * b2_pi);
+            xf2.p = -xf2.q.GetXAxis();
+
+            vertices[0] = b2Mul(xf2, b2Vec2(-1.0f, 0.0f));
+            vertices[1] = b2Mul(xf2, b2Vec2(1.0f, 0.0f));
+            vertices[2] = b2Mul(xf2, b2Vec2(0.0f, 0.5f));
+
+            b2PolygonShape poly2;
+            poly2.Set(vertices, 3);
+
+            b2FixtureDef sd2;
+            sd2.shape = &poly2;
+            sd2.density = 2.0f;
+
+            b2BodyDef bd;
+            bd.type = b2_dynamicBody;
+            bd.angularDamping = 5.0f;
+            bd.linearDamping = 0.1f;
+
+            bd.position.Set(0.0f, 2.0f);
+            bd.angle = b2_pi;
+            bd.allowSleep = false;
+            m_body = m_world->CreateBody(&bd);
+            m_body->CreateFixture(&sd1);
+            m_body->CreateFixture(&sd2);
+        }
+
+        {
+            b2PolygonShape shape;
+            shape.SetAsBox(0.5f, 0.5f);
+
+            b2FixtureDef fd;
+            fd.shape = &shape;
+            fd.density = 1.0f;
+            fd.friction = 0.3f;
+
+            for (int i = 0; i < 10; ++i)
+            {
+                b2BodyDef bd;
+                bd.type = b2_dynamicBody;
+
+                bd.position.Set(0.0f, 5.0f + 1.54f * i);
+                b2Body* body = m_world->CreateBody(&bd);
+
+                body->CreateFixture(&fd);
+
+                float32 gravity = 10.0f;
+                float32 I = body->GetInertia();
+                float32 mass = body->GetMass();
+
+                // For a circle: I = 0.5 * m * r * r ==> r = sqrt(2 * I / m)
+                float32 radius = b2Sqrt(2.0f * I / mass);
+
+                b2FrictionJointDef jd;
+                jd.localAnchorA.SetZero();
+                jd.localAnchorB.SetZero();
+                jd.bodyA = ground;
+                jd.bodyB = body;
+                jd.collideConnected = true;
+                jd.maxForce = mass * gravity;
+                jd.maxTorque = mass * radius * gravity;
+
+                m_world->CreateJoint(&jd);
+            }
+        }
+    }
+
+    void Keyboard(unsigned char key)
+    {
+        switch (key)
+        {
+        case 'w':
+            {
+                b2Vec2 f = m_body->GetWorldVector(b2Vec2(0.0f, -200.0f));
+                b2Vec2 p = m_body->GetWorldPoint(b2Vec2(0.0f, 2.0f));
+                m_body->ApplyForce(f, p);
+            }
+            break;
+
+        case 'a':
+            {
+                m_body->ApplyTorque(50.0f);
+            }
+            break;
+
+        case 'd':
+            {
+                m_body->ApplyTorque(-50.0f);
+            }
+            break;
+
+        default:
+            break;
+        }
+    }
+
+    static Test* Create()
+    {
+        return new ApplyForce;
+    }
+
+    b2Body* m_body;
+};
+
+#endif