b2_draw.h

// 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