physicsdebugdrawer.h

Go to the documentation of this file.

// adaptation of the code found here: https://github.com/gman0/Quarter-Life

#ifndef PHYSICS_DEBUG_DRAW
#define PHYSICS_DEBUG_DRAW

#include <cmath>
#include <bullet/btBulletDynamicsCommon.h>
#include <OGRE/Ogre.h>

typedef std::vector<Ogre::Vector3> Vector3Array;

class DynamicRenderable : public Ogre::SimpleRenderable
{
public:
  DynamicRenderable();
  virtual ~DynamicRenderable();

  void initialize(Ogre::RenderOperation::OperationType operationType,
                  bool useIndices);

  virtual Ogre::Real getBoundingRadius(void) const;
  virtual Ogre::Real getSquaredViewDepth(const Ogre::Camera* cam) const;

protected:
  size_t mVertexBufferCapacity;
  size_t mIndexBufferCapacity;

  virtual void createVertexDeclaration() = 0;

  void prepareHardwareBuffers(size_t vertexCount, size_t indexCount);

  virtual void fillHardwareBuffers() = 0;
};




class DynamicLines : public DynamicRenderable
{
  typedef Ogre::RenderOperation::OperationType OperationType;

public:
  DynamicLines(OperationType opType = Ogre::RenderOperation::OT_LINE_STRIP);
  virtual ~DynamicLines();

  void addPoint(const Ogre::Vector3 &p);
  void addPoint(Ogre::Real x, Ogre::Real y, Ogre::Real z);

  void setPoint(unsigned short index, const Ogre::Vector3 &value);

  const Ogre::Vector3& getPoint(unsigned short index) const;

  unsigned short getNumPoints(void) const;

  void clear();

  void update();

  void setOperationType(OperationType opType);
  OperationType getOperationType() const;

protected:
  virtual void createVertexDeclaration();
  virtual void fillHardwareBuffers();

private:
  std::vector<Ogre::Vector3> mPoints;
  bool mDirty;
};



class PhysicsDebugDrawer : public btIDebugDraw
{
protected:
    Ogre::SceneNode *mNode;
    btDynamicsWorld *mWorld;
    DynamicLines *mLineDrawer;
    bool mDebugOn;

public:
    typedef std::shared_ptr<PhysicsDebugDrawer> shared;

    PhysicsDebugDrawer(Ogre::SceneNode *node, btDynamicsWorld *world);

    ~PhysicsDebugDrawer();

    void step();

    void drawLine(const btVector3& from,const btVector3& to,const btVector3& color);

    void drawContactPoint(const btVector3& PointOnB,const btVector3& normalOnB, btScalar distance, int lifeTime,const btVector3& color);

    void reportErrorWarning(const char* warningString);

    void draw3dText(const btVector3& location,const char* textString);

    //0 for off, anything else for on.
    void setDebugMode(int isOn);

    //0 for off, anything else for on.
    int getDebugMode() const;

};


#endif // PHYSICS_DEBUG_DRAW