98 lines
2.9 KiB
C++
98 lines
2.9 KiB
C++
/*
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* Copyright (c) 2011 Erin Catto http://box2d.org
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*/
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#ifndef B2_DRAW_H
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#define B2_DRAW_H
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#include "Box2D/Common/b2Math.h"
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/// Color for debug drawing. Each value has the range [0,1].
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struct b2Color
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{
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b2Color() {}
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b2Color(float32 rIn, float32 gIn, float32 bIn, float32 aIn = 1.0f)
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{
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r = rIn; g = gIn; b = bIn; a = aIn;
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}
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void Set(float32 rIn, float32 gIn, float32 bIn, float32 aIn = 1.0f)
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{
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r = rIn; g = gIn; b = bIn; a = aIn;
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}
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float32 r, g, b, a;
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};
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/// Implement and register this class with a b2World to provide debug drawing of physics
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/// entities in your game.
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class b2Draw
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{
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public:
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b2Draw();
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virtual ~b2Draw() {}
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enum
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{
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e_shapeBit = 0x0001, ///< draw shapes
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e_jointBit = 0x0002, ///< draw joint connections
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e_aabbBit = 0x0004, ///< draw axis aligned bounding boxes
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e_pairBit = 0x0008, ///< draw broad-phase pairs
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e_centerOfMassBit = 0x0010 ///< draw center of mass frame
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};
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/// Set the drawing flags.
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void SetFlags(uint32 flags);
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/// Get the drawing flags.
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uint32 GetFlags() const;
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/// Append flags to the current flags.
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void AppendFlags(uint32 flags);
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/// Clear flags from the current flags.
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void ClearFlags(uint32 flags);
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/// Draw a closed polygon provided in CCW order.
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virtual void DrawPolygon(const b2Vec2* vertices, int32 vertexCount, const b2Color& color) = 0;
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/// Draw a solid closed polygon provided in CCW order.
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virtual void DrawSolidPolygon(const b2Vec2* vertices, int32 vertexCount, const b2Color& color) = 0;
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/// Draw a circle.
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virtual void DrawCircle(const b2Vec2& center, float32 radius, const b2Color& color) = 0;
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/// Draw a solid circle.
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virtual void DrawSolidCircle(const b2Vec2& center, float32 radius, const b2Vec2& axis, const b2Color& color) = 0;
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/// Draw a line segment.
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virtual void DrawSegment(const b2Vec2& p1, const b2Vec2& p2, const b2Color& color) = 0;
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/// Draw a transform. Choose your own length scale.
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/// @param xf a transform.
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virtual void DrawTransform(const b2Transform& xf) = 0;
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/// Draw a point.
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virtual void DrawPoint(const b2Vec2& p, float32 size, const b2Color& color) = 0;
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protected:
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uint32 m_drawFlags;
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};
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#endif
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