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