/*
  ==============================================================================

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2020 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

//==============================================================================
/** 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.

    @tags{Box2D}
*/
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)
};

} // namespace juce