- clean working copy for leaving SVN
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/*
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==============================================================================
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This file is part of the JUCE library - "Jules' Utility Class Extensions"
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Copyright 2004-12 by Raw Material Software Ltd.
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------------------------------------------------------------------------------
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JUCE can be redistributed and/or modified under the terms of the GNU General
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Public License (Version 2), as published by the Free Software Foundation.
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A copy of the license is included in the JUCE distribution, or can be found
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online at www.gnu.org/licenses.
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.rawmaterialsoftware.com/juce for more information.
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==============================================================================
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*/
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#include "../JuceDemoHeader.h"
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// (These classes and random functions are used inside the 3rd-party Box2D demo code)
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inline float32 RandomFloat() { return Random::getSystemRandom().nextFloat() * 2.0f - 1.0f; }
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inline float32 RandomFloat (float32 lo, float32 hi) { return Random::getSystemRandom().nextFloat() * (hi - lo) + lo; }
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struct Settings
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{
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Settings()
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: viewCenter (0.0f, 20.0f),
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hz (60.0f),
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velocityIterations (8),
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positionIterations (3),
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drawShapes (1),
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drawJoints (1),
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drawAABBs (0),
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drawPairs (0),
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drawContactPoints (0),
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drawContactNormals (0),
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drawContactForces (0),
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drawFrictionForces (0),
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drawCOMs (0),
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drawStats (0),
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drawProfile (0),
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enableWarmStarting (1),
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enableContinuous (1),
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enableSubStepping (0),
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pause (0),
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singleStep (0)
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{}
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b2Vec2 viewCenter;
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float32 hz;
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int velocityIterations;
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int positionIterations;
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int drawShapes;
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int drawJoints;
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int drawAABBs;
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int drawPairs;
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int drawContactPoints;
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int drawContactNormals;
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int drawContactForces;
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int drawFrictionForces;
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int drawCOMs;
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int drawStats;
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int drawProfile;
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int enableWarmStarting;
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int enableContinuous;
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int enableSubStepping;
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int pause;
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int singleStep;
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};
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struct Test
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{
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Test() : m_world (new b2World (b2Vec2 (0.0f, -10.0f))) {}
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virtual ~Test() {}
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virtual void Keyboard (unsigned char /*key*/) {}
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virtual void KeyboardUp (unsigned char /*key*/) {}
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ScopedPointer<b2World> m_world;
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};
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#include "Box2DTests/AddPair.h"
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#include "Box2DTests/ApplyForce.h"
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#include "Box2DTests/Dominos.h"
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#include "Box2DTests/Chain.h"
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//==============================================================================
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/** This list box just displays a StringArray and broadcasts a change message when the
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selected row changes.
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*/
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class Box2DTestList : public ListBoxModel,
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public ChangeBroadcaster
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{
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public:
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Box2DTestList (const StringArray& testList) : tests (testList)
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{
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}
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int getNumRows() override { return tests.size(); }
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void paintListBoxItem (int row, Graphics& g, int w, int h, bool rowIsSelected) override
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{
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if (rowIsSelected)
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g.fillAll (LookAndFeel::getDefaultLookAndFeel().findColour (TextEditor::highlightColourId));
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const Font f (h * 0.7f);
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g.setColour (Colours::black);
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g.setFont (f);
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g.drawText (tests[row], Rectangle<int> (0, 0, w, h).reduced (2),
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Justification::centredLeft, true);
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}
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void selectedRowsChanged (int /*lastRowSelected*/) override
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{
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sendChangeMessage();
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}
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private:
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StringArray tests;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (Box2DTestList)
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};
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//==============================================================================
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struct Box2DRenderComponent : public Component
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{
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Box2DRenderComponent()
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{
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setOpaque (true);
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}
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void paint (Graphics& g)
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{
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g.fillAll (Colours::white);
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if (currentTest != nullptr)
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{
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Box2DRenderer renderer;
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renderer.render (g, *currentTest->m_world,
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-16.0f, 30.0f, 16.0f, -1.0f,
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getLocalBounds().toFloat().reduced (8.0f));
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}
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}
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ScopedPointer<Test> currentTest;
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};
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//==============================================================================
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class Box2DDemo : public Component,
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private Timer,
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private ChangeListener
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{
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public:
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enum Demos
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{
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addPair = 0,
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applyForce,
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dominoes,
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chain,
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numTests
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};
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Box2DDemo()
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: testsList (getTestsList()),
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testsListModel (testsList)
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{
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setOpaque (true);
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setWantsKeyboardFocus (true);
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testsListModel.addChangeListener (this);
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addAndMakeVisible (renderComponent);
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addAndMakeVisible (testsListBox);
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testsListBox.setModel (&testsListModel);
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testsListBox.selectRow (dominoes);
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testsListBox.setColour (ListBox::backgroundColourId, Colours::lightgrey);
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addAndMakeVisible (instructions);
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instructions.setMultiLine (true);
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instructions.setReadOnly (true);
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instructions.setColour (TextEditor::backgroundColourId, Colours::lightgrey);
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startTimerHz (60);
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}
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~Box2DDemo()
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{
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testsListModel.removeChangeListener (this);
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}
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void paint (Graphics& g) override
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{
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fillTiledBackground (g);
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}
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void resized() override
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{
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Rectangle<int> r (getLocalBounds().reduced (4));
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Rectangle<int> area (r.removeFromBottom (150));
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testsListBox.setBounds (area.removeFromLeft (150));
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area.removeFromLeft (4);
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instructions.setBounds (area);
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r.removeFromBottom (6);
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renderComponent.setBounds (r);
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}
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bool keyPressed (const KeyPress& key) override
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{
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if (renderComponent.currentTest != nullptr)
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{
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// We override this to avoid the system beeping for an unused keypress
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switch (key.getTextCharacter())
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{
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case 'a':
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case 'w':
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case 'd':
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return true;
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default:
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break;
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}
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}
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return false;
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}
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private:
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StringArray testsList;
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Box2DTestList testsListModel;
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Box2DRenderComponent renderComponent;
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ListBox testsListBox;
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TextEditor instructions;
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static Test* createTest (int index)
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{
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switch (index)
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{
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case addPair: return new AddPair();
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case applyForce: return new ApplyForce();
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case dominoes: return new Dominos();
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case chain: return new Chain();
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default: break;
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}
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return nullptr;
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}
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static String getInstructions (int index)
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{
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switch (index)
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{
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case applyForce:
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{
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String s;
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s << "Keys:" << newLine << newLine << "Left: \'a\'" << newLine << "Right: \'d\'" << newLine << "Forward: \'w\'";
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return s;
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}
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default:
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break;
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}
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return String::empty;
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}
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void checkKeys()
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{
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if (renderComponent.currentTest == nullptr)
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return;
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checkKeyCode ('a');
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checkKeyCode ('w');
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checkKeyCode ('d');
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}
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void checkKeyCode (const int keyCode)
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{
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if (KeyPress::isKeyCurrentlyDown (keyCode))
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renderComponent.currentTest->Keyboard ((unsigned char) keyCode);
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}
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void timerCallback() override
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{
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if (renderComponent.currentTest == nullptr)
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return;
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grabKeyboardFocus();
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checkKeys();
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renderComponent.currentTest->m_world->Step (1.0f / 60.0f, 6, 2);
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repaint();
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}
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void changeListenerCallback (ChangeBroadcaster* source) override
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{
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if (source == &testsListModel)
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{
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const int index = testsListBox.getSelectedRow();
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renderComponent.currentTest = createTest (index);
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instructions.setText (getInstructions (index));
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repaint();
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}
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}
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static StringArray getTestsList()
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{
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const char* tests[] =
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{
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"Add Pair Stress Test",
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"Apply Force",
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"Dominoes",
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"Chain"
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};
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jassert (numElementsInArray (tests) == numTests);
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return StringArray (tests, numElementsInArray (tests));
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}
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (Box2DDemo)
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};
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// This static object will register this demo type in a global list of demos..
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static JuceDemoType<Box2DDemo> demo ("29 Graphics: Box 2D");
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