- 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.
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Copyright (c) 2013 - Raw Material Software Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found 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.juce.com for more information.
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==============================================================================
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*/
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Box2DRenderer::Box2DRenderer() noexcept : graphics (nullptr)
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{
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SetFlags (e_shapeBit);
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}
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void Box2DRenderer::render (Graphics& g, b2World& world,
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float left, float top, float right, float bottom,
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const Rectangle<float>& target)
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{
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graphics = &g;
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g.addTransform (AffineTransform::fromTargetPoints (left, top, target.getX(), target.getY(),
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right, top, target.getRight(), target.getY(),
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left, bottom, target.getX(), target.getBottom()));
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world.SetDebugDraw (this);
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world.DrawDebugData();
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}
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Colour Box2DRenderer::getColour (const b2Color& c) const
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{
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return Colour::fromFloatRGBA (c.r, c.g, c.b, 1.0f);
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}
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float Box2DRenderer::getLineThickness() const
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{
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return 0.1f;
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}
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static void createPath (Path& p, const b2Vec2* vertices, int32 vertexCount)
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{
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p.startNewSubPath (vertices[0].x, vertices[0].y);
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for (int i = 1; i < vertexCount; ++i)
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p.lineTo (vertices[i].x, vertices[i].y);
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p.closeSubPath();
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}
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void Box2DRenderer::DrawPolygon (const b2Vec2* vertices, int32 vertexCount, const b2Color& color)
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{
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graphics->setColour (getColour (color));
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Path p;
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createPath (p, vertices, vertexCount);
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graphics->strokePath (p, PathStrokeType (getLineThickness()));
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}
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void Box2DRenderer::DrawSolidPolygon (const b2Vec2* vertices, int32 vertexCount, const b2Color& color)
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{
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graphics->setColour (getColour (color));
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Path p;
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createPath (p, vertices, vertexCount);
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graphics->fillPath (p);
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}
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void Box2DRenderer::DrawCircle (const b2Vec2& center, float32 radius, const b2Color& color)
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{
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graphics->setColour (getColour (color));
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graphics->drawEllipse (center.x - radius, center.y - radius,
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radius * 2.0f, radius * 2.0f,
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getLineThickness());
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}
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void Box2DRenderer::DrawSolidCircle (const b2Vec2& center, float32 radius, const b2Vec2& /*axis*/, const b2Color& colour)
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{
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graphics->setColour (getColour (colour));
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graphics->fillEllipse (center.x - radius, center.y - radius,
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radius * 2.0f, radius * 2.0f);
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}
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void Box2DRenderer::DrawSegment (const b2Vec2& p1, const b2Vec2& p2, const b2Color& color)
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{
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graphics->setColour (getColour (color));
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graphics->drawLine (p1.x, p1.y, p2.x, p2.y, getLineThickness());
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}
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void Box2DRenderer::DrawTransform (const b2Transform&)
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{
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}
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@@ -0,0 +1,77 @@
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/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2013 - Raw Material Software Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found 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.juce.com for more information.
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==============================================================================
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*/
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#ifndef JUCE_BOX2DRENDERER_H_INCLUDED
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#define JUCE_BOX2DRENDERER_H_INCLUDED
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//=============================================================================
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/** A simple implementation of the b2Draw class, used to draw a Box2D world.
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To use it, simply create an instance of this class in your paint() method,
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and call its render() method.
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*/
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class Box2DRenderer : public b2Draw
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{
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public:
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Box2DRenderer() noexcept;
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/** Renders the world.
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@param g the context to render into
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@param world the world to render
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@param box2DWorldLeft the left coordinate of the area of the world to be drawn
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@param box2DWorldTop the top coordinate of the area of the world to be drawn
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@param box2DWorldRight the right coordinate of the area of the world to be drawn
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@param box2DWorldBottom the bottom coordinate of the area of the world to be drawn
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@param targetArea the area within the target context onto which the source
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world rectangle should be mapped
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*/
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void render (Graphics& g,
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b2World& world,
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float box2DWorldLeft, float box2DWorldTop,
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float box2DWorldRight, float box2DWorldBottom,
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const Rectangle<float>& targetArea);
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// b2Draw methods:
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void DrawPolygon (const b2Vec2*, int32, const b2Color&) override;
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void DrawSolidPolygon (const b2Vec2*, int32, const b2Color&) override;
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void DrawCircle (const b2Vec2& center, float32 radius, const b2Color&) override;
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void DrawSolidCircle (const b2Vec2& center, float32 radius, const b2Vec2& axis, const b2Color&) override;
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void DrawSegment (const b2Vec2& p1, const b2Vec2& p2, const b2Color&) override;
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void DrawTransform (const b2Transform& xf) override;
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/** Converts a b2Color to a juce Colour. */
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virtual Colour getColour (const b2Color&) const;
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/** Returns the thickness to use for drawing outlines. */
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virtual float getLineThickness() const;
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protected:
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Graphics* graphics;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (Box2DRenderer)
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};
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#endif // JUCE_BOX2DRENDERER_H_INCLUDED
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