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Created Box2D module.

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jules 2013-04-27 10:42:37 +01:00
parent 4b6a094d13
commit 07a1aa9543
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104
modules/juce_box2d/utils/juce_Box2DRenderer.cpp Normal file
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/*
==============================================================================
This file is part of the JUCE library - "Jules' Utility Class Extensions"
Copyright 2004-11 by Raw Material Software Ltd.
------------------------------------------------------------------------------
JUCE can be redistributed and/or modified under the terms of the GNU General
Public License (Version 2), as published by the Free Software Foundation.
A copy of the license is included in the JUCE distribution, or can be found
online at www.gnu.org/licenses.
JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
------------------------------------------------------------------------------
To release a closed-source product which uses JUCE, commercial licenses are
available: visit www.rawmaterialsoftware.com/juce for more information.
==============================================================================
*/
Box2DRenderer::Box2DRenderer() noexcept : graphics (nullptr)
{
SetFlags (e_shapeBit);
}
void Box2DRenderer::render (Graphics& g, b2World& world,
float left, float top, float right, float bottom,
const Rectangle<float>& target)
{
graphics = &g;
g.addTransform (AffineTransform::fromTargetPoints (left, top, target.getX(), target.getY(),
right, top, target.getRight(), target.getY(),
left, bottom, target.getX(), target.getBottom()));
world.SetDebugDraw (this);
world.DrawDebugData();
}
Colour Box2DRenderer::getColour (const b2Color& c) const
{
return Colour::fromFloatRGBA (c.r, c.g, c.b, 1.0f);
}
float Box2DRenderer::getLineThickness() const
{
return 0.1f;
}
static void createPath (Path& p, const b2Vec2* vertices, int32 vertexCount)
{
p.startNewSubPath (vertices[0].x, vertices[0].y);
for (int i = 1; i < vertexCount; ++i)
p.lineTo (vertices[i].x, vertices[i].y);
}
void Box2DRenderer::DrawPolygon (const b2Vec2* vertices, int32 vertexCount, const b2Color& color)
{
graphics->setColour (getColour (color));
Path p;
createPath (p, vertices, vertexCount);
graphics->strokePath (p, PathStrokeType (getLineThickness()));
}
void Box2DRenderer::DrawSolidPolygon (const b2Vec2* vertices, int32 vertexCount, const b2Color& color)
{
graphics->setColour (getColour (color));
Path p;
createPath (p, vertices, vertexCount);
graphics->fillPath (p);
}
void Box2DRenderer::DrawCircle (const b2Vec2& center, float32 radius, const b2Color& color)
{
graphics->setColour (getColour (color));
graphics->drawEllipse (center.x - radius, center.y - radius,
radius * 2.0f, radius * 2.0f,
getLineThickness());
}
void Box2DRenderer::DrawSolidCircle (const b2Vec2& center, float32 radius, const b2Vec2& axis, const b2Color& color)
{
graphics->setColour (getColour (color));
graphics->fillEllipse (center.x - radius, center.y - radius,
radius * 2.0f, radius * 2.0f);
}
void Box2DRenderer::DrawSegment (const b2Vec2& p1, const b2Vec2& p2, const b2Color& color)
{
graphics->setColour (getColour (color));
graphics->drawLine (p1.x, p1.y, p2.x, p2.y, getLineThickness());
}
void Box2DRenderer::DrawTransform (const b2Transform&)
{
}

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modules/juce_box2d/utils/juce_Box2DRenderer.h Normal file
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/*
==============================================================================
This file is part of the JUCE library - "Jules' Utility Class Extensions"
Copyright 2004-11 by Raw Material Software Ltd.
------------------------------------------------------------------------------
JUCE can be redistributed and/or modified under the terms of the GNU General
Public License (Version 2), as published by the Free Software Foundation.
A copy of the license is included in the JUCE distribution, or can be found
online at www.gnu.org/licenses.
JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
------------------------------------------------------------------------------
To release a closed-source product which uses JUCE, commercial licenses are
available: visit www.rawmaterialsoftware.com/juce for more information.
==============================================================================
*/
#ifndef __JUCE_BOX2DRENDERER_JUCEHEADER__
#define __JUCE_BOX2DRENDERER_JUCEHEADER__
//=============================================================================
/** A simple implementation of the b2Draw class, used to draw a Box2D world.
To use it, simply create an instance of this class in your paint() method,
and call its render() method.
*/
class Box2DRenderer : public b2Draw
{
public:
Box2DRenderer() noexcept;
/** Renders the world.
@param g the context to render into
@param world the world to render
@param box2DWorldLeft the left coordinate of the area of the world to be drawn
@param box2DWorldTop the top coordinate of the area of the world to be drawn
@param box2DWorldRight the right coordinate of the area of the world to be drawn
@param box2DWorldBottom the bottom coordinate of the area of the world to be drawn
@param targetArea the area within the target context onto which the source
world rectangle should be mapped
*/
void render (Graphics& g,
b2World& world,
float box2DWorldLeft, float box2DWorldTop,
float box2DWorldRight, float box2DWorldBottom,
const Rectangle<float>& targetArea);
// b2Draw methods:
void DrawPolygon (const b2Vec2*, int32, const b2Color&) override;
void DrawSolidPolygon (const b2Vec2*, int32, const b2Color&) override;
void DrawCircle (const b2Vec2& center, float32 radius, const b2Color&) override;
void DrawSolidCircle (const b2Vec2& center, float32 radius, const b2Vec2& axis, const b2Color&) override;
void DrawSegment (const b2Vec2& p1, const b2Vec2& p2, const b2Color&) override;
void DrawTransform (const b2Transform& xf) override;
/** Converts a b2Color to a juce Colour. */
virtual Colour getColour (const b2Color&) const;
/** Returns the thickness to use for drawing outlines. */
virtual float getLineThickness() const;
protected:
Graphics* graphics;
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (Box2DRenderer)
};
#endif // __JUCE_BOX2DRENDERER_JUCEHEADER__