b2_draw.h

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// MIT License

// Copyright (c) 2019 Erin Catto

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

#ifndef B2_DRAW_H
#define B2_DRAW_H

#include "b2_api.h"
#include "b2_math.h"

struct B2_API b2Color
{
        b2Color() {}
        b2Color(float rIn, float gIn, float bIn, float aIn = 1.0f)
        {
                r = rIn; g = gIn; b = bIn; a = aIn;
        }

        void Set(float rIn, float gIn, float bIn, float aIn = 1.0f)
        {
                r = rIn; g = gIn; b = bIn; a = aIn;
        }

        float r, g, b, a;
};

class B2_API b2Draw
{
public:
        b2Draw();

        virtual ~b2Draw() {}

        enum
        {
                e_shapeBit                              = 0x0001,       
                e_jointBit                              = 0x0002,       
                e_aabbBit                               = 0x0004,       
                e_pairBit                               = 0x0008,       
                e_centerOfMassBit               = 0x0010        
        };

        void SetFlags(uint32 flags);

        uint32 GetFlags() const;

        void AppendFlags(uint32 flags);

        void ClearFlags(uint32 flags);

        virtual void DrawPolygon(const b2Vec2* vertices, int32 vertexCount, const b2Color& color) = 0;

        virtual void DrawSolidPolygon(const b2Vec2* vertices, int32 vertexCount, const b2Color& color) = 0;

        virtual void DrawCircle(const b2Vec2& center, float radius, const b2Color& color) = 0;

        virtual void DrawSolidCircle(const b2Vec2& center, float radius, const b2Vec2& axis, const b2Color& color) = 0;

        virtual void DrawSegment(const b2Vec2& p1, const b2Vec2& p2, const b2Color& color) = 0;

        virtual void DrawTransform(const b2Transform& xf) = 0;

        virtual void DrawPoint(const b2Vec2& p, float size, const b2Color& color) = 0;

protected:
        uint32 m_drawFlags;
};

#endif