Added Box2D

external/Box2D-2.3.1/Box2D/Testbed/Framework/DebugDraw.h

@@ -0,0 +1,94 @@
+/*
+* Copyright (c) 2006-2013 Erin Catto http://www.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.
+*/
+
+#ifndef DEBUGDRAW_H
+#define DEBUGDRAW_H
+
+#include <Box2D/Box2D.h>
+
+struct b2AABB;
+struct GLRenderPoints;
+struct GLRenderLines;
+struct GLRenderTriangles;
+
+//
+struct Camera
+{
+	Camera()
+	{
+		m_center.Set(0.0f, 20.0f);
+		m_extent = 25.0f;
+		m_zoom = 1.0f;
+		m_width = 1280;
+		m_height = 800;
+	}
+
+	b2Vec2 ConvertScreenToWorld(const b2Vec2& screenPoint);
+	b2Vec2 ConvertWorldToScreen(const b2Vec2& worldPoint);
+	void BuildProjectionMatrix(float32* m, float32 zBias);
+
+	b2Vec2 m_center;
+	float32 m_extent;
+	float32 m_zoom;
+	int32 m_width;
+	int32 m_height;
+};
+
+// This class implements debug drawing callbacks that are invoked
+// inside b2World::Step.
+class DebugDraw : public b2Draw
+{
+public:
+	DebugDraw();
+	~DebugDraw();
+
+	void Create();
+	void Destroy();
+
+	void DrawPolygon(const b2Vec2* vertices, int32 vertexCount, const b2Color& color);
+
+	void DrawSolidPolygon(const b2Vec2* vertices, int32 vertexCount, const b2Color& color);
+
+	void DrawCircle(const b2Vec2& center, float32 radius, const b2Color& color);
+
+	void DrawSolidCircle(const b2Vec2& center, float32 radius, const b2Vec2& axis, const b2Color& color);
+
+	void DrawSegment(const b2Vec2& p1, const b2Vec2& p2, const b2Color& color);
+
+	void DrawTransform(const b2Transform& xf);
+
+    void DrawPoint(const b2Vec2& p, float32 size, const b2Color& color);
+
+    void DrawString(int x, int y, const char* string, ...); 
+
+    void DrawString(const b2Vec2& p, const char* string, ...);
+
+    void DrawAABB(b2AABB* aabb, const b2Color& color);
+
+    void Flush();
+    
+private:
+	GLRenderPoints* m_points;
+    GLRenderLines* m_lines;
+    GLRenderTriangles* m_triangles;
+};
+
+extern DebugDraw g_debugDraw;
+extern Camera g_camera;
+
+#endif