DebugDrawer.h

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/*
 * DebugDrawer.h
 *
 *  Created on: Mar 10, 2012
 *      Author: sushil
 */

#ifndef DEBUGDRAWER_H_
#define DEBUGDRAWER_H_
#include <OgreSingleton.h>
#include <map>

namespace OgreGFX {

        typedef std::pair<Ogre::Vector3, Ogre::ColourValue> VertexPair;
        typedef long int __int64;

        #define DEFAULT_ICOSPHERE_RECURSION_LEVEL       1

        class IcoSphere
        {
        public:
                struct TriangleIndices
                {
                        int v1, v2, v3;

                        TriangleIndices(int _v1, int _v2, int _v3) : v1(_v1), v2(_v2), v3(_v3) {}

                        bool operator < (const TriangleIndices &o) const { return v1 < o.v1 && v2 < o.v2 && v3 < o.v3; }
                };

                struct LineIndices
                {
                        int v1, v2;

                        LineIndices(int _v1, int _v2) : v1(_v1), v2(_v2) {}

                        bool operator == (const LineIndices &o) const
                        {
                                return (v1 == o.v1 && v2 == o.v2) || (v1 == o.v2 && v2 == o.v1);
                        }
                };

                IcoSphere();
                ~IcoSphere();

                void create(int recursionLevel);
                void addToLineIndices(int baseIndex, std::list<int> *target);
                int addToVertices(std::list<VertexPair> *target, const Ogre::Vector3 &position, const Ogre::ColourValue &colour, float scale);
                void addToTriangleIndices(int baseIndex, std::list<int> *target);

        private:
                int addVertex(const Ogre::Vector3 &vertex);
                void addLineIndices(int index0, int index1);
                void addTriangleLines(int index0, int index1, int index2);
                int getMiddlePoint(int index0, int index1);
                void addFace(int index0, int index1, int index2);

                void removeLineIndices(int index0, int index1);

                std::vector<Ogre::Vector3> vertices;
                std::list<LineIndices> lineIndices;
                std::list<int> triangleIndices;
                std::list<TriangleIndices> faces;
                //std::map<__int64, int> middlePointIndexCache;
                std::map<long int, int> middlePointIndexCache;
                int index;
        };

        class DebugDrawer : public Ogre::Singleton<DebugDrawer>
        {
        public:
                DebugDrawer(Ogre::SceneManager *_sceneManager, float _fillAlpha);
                ~DebugDrawer();

                static DebugDrawer& getSingleton(void);
                static DebugDrawer* getSingletonPtr(void);

                void build();

                void setIcoSphereRecursionLevel(int recursionLevel);

                void drawLine(const Ogre::Vector3 &start, const Ogre::Vector3 &end, const Ogre::ColourValue &colour);
                void drawAngleLine(const Ogre::Vector3 &start, const Ogre::Radian &angle, float length, const Ogre::ColourValue &colour);
                void drawCircle(const Ogre::Vector3 &centre, float radius, int segmentsCount, const Ogre::ColourValue& colour, bool isFilled = false);
                void drawCylinder(const Ogre::Vector3 &centre, float radius, int segmentsCount, float height, const Ogre::ColourValue& colour, bool isFilled = false);
                void drawQuad(const Ogre::Vector3 *vertices, const Ogre::ColourValue& colour, bool isFilled = false);
                void drawCuboid(const Ogre::Vector3 *vertices, const Ogre::ColourValue& colour, bool isFilled = false);
                void drawSphere(const Ogre::Vector3 &centre, float radius, const Ogre::ColourValue& colour, bool isFilled = false);
                void drawTetrahedron(const Ogre::Vector3 &centre, float scale, const Ogre::ColourValue& colour, bool isFilled = false);

                bool getEnabled() { return isEnabled; }
                void setEnabled(bool _isEnabled) { isEnabled = _isEnabled; }
                void switchEnabled() { isEnabled = !isEnabled; }

                void clear();

        private:
                bool isEnabled;
                Ogre::SceneManager *sceneManager;
                float fillAlpha;

                Ogre::ManualObject *manualObject;

                IcoSphere icoSphere;



                std::list<VertexPair> lineVertices, triangleVertices;
                std::list<int> lineIndices, triangleIndices;

                int linesIndex, trianglesIndex;

                void initialise();
                void shutdown();

                void buildLine(const Ogre::Vector3& start, const Ogre::Vector3& end, const Ogre::ColourValue& colour, float alpha = 1.0f);
                void buildAngleLine(const Ogre::Vector3 &start, const Ogre::Radian &angle, float length, const Ogre::ColourValue &colour, float alpha = 1.0f);
                void buildQuad(const Ogre::Vector3 *vertices, const Ogre::ColourValue& colour, float alpha = 1.0f);
                void buildFilledQuad(const Ogre::Vector3 *vertices, const Ogre::ColourValue& colour, float alpha = 1.0f);
                void buildFilledTriangle(const Ogre::Vector3 *vertices, const Ogre::ColourValue& colour, float alpha = 1.0f);
                void buildCuboid(const Ogre::Vector3 *vertices, const Ogre::ColourValue& colour, float alpha = 1.0f);
                void buildFilledCuboid(const Ogre::Vector3 *vertices, const Ogre::ColourValue& colour, float alpha = 1.0f);

                void buildCircle(const Ogre::Vector3 &centre, float radius, int segmentsCount, const Ogre::ColourValue& colour, float alpha = 1.0f);
                void buildFilledCircle(const Ogre::Vector3 &centre, float radius, int segmentsCount, const Ogre::ColourValue& colour, float alpha = 1.0f);

                void buildCylinder(const Ogre::Vector3 &centre, float radius, int segmentsCount, float height, const Ogre::ColourValue& colour, float alpha = 1.0f);
                void buildFilledCylinder(const Ogre::Vector3 &centre, float radius, int segmentsCount, float height, const Ogre::ColourValue& colour, float alpha = 1.0f);

                void buildTetrahedron(const Ogre::Vector3 &centre, float scale, const Ogre::ColourValue &colour, float alpha = 1.0f);
                void buildFilledTetrahedron(const Ogre::Vector3 &centre, float scale, const Ogre::ColourValue &colour, float alpha = 1.0f);

                int addLineVertex(const Ogre::Vector3 &vertex, const Ogre::ColourValue &colour);
                void addLineIndices(int index1, int index2);

                int addTriangleVertex(const Ogre::Vector3 &vertex, const Ogre::ColourValue &colour);
                void addTriangleIndices(int index1, int index2, int index3);

                void addQuadIndices(int index1, int index2, int index3, int index4);
        };

}
#endif /* DEBUGDRAWER_H_ */

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