OGRE
13.6
ObjectOriented Graphics Rendering Engine

This class interpolates orientations (rotations) along a spline using derivatives of quaternions. More...
#include <OgreRotationalSpline.h>
Public Member Functions  
RotationalSpline ()  
~RotationalSpline ()  
void  addPoint (const Quaternion &p) 
Adds a control point to the end of the spline. More...  
void  clear (void) 
Clears all the points in the spline. More...  
unsigned short  getNumPoints (void) const 
Gets the number of control points in the spline. More...  
const Quaternion &  getPoint (unsigned short index) const 
Gets the detail of one of the control points of the spline. More...  
Quaternion  interpolate (Real t, bool useShortestPath=true) 
Returns an interpolated point based on a parametric value over the whole series. More...  
Quaternion  interpolate (unsigned int fromIndex, Real t, bool useShortestPath=true) 
Interpolates a single segment of the spline given a parametric value. More...  
void  recalcTangents (void) 
Recalculates the tangents associated with this spline. More...  
void  setAutoCalculate (bool autoCalc) 
Tells the spline whether it should automatically calculate tangents on demand as points are added. More...  
void  updatePoint (unsigned short index, const Quaternion &value) 
Updates a single point in the spline. More...  
This class interpolates orientations (rotations) along a spline using derivatives of quaternions.
Like the SimpleSpline class, this class is about interpolating values smoothly over a spline. Whilst SimpleSpline deals with positions (the normal sense we think about splines), this class interpolates orientations. The theory is identical, except we're now in 4dimensional space instead of 3.
Ogre::RotationalSpline::RotationalSpline  (  ) 
Ogre::RotationalSpline::~RotationalSpline  (  ) 
void Ogre::RotationalSpline::addPoint  (  const Quaternion &  p  ) 
Adds a control point to the end of the spline.
const Quaternion& Ogre::RotationalSpline::getPoint  (  unsigned short  index  )  const 
Gets the detail of one of the control points of the spline.
unsigned short Ogre::RotationalSpline::getNumPoints  (  void  )  const 
Gets the number of control points in the spline.
void Ogre::RotationalSpline::clear  (  void  ) 
Clears all the points in the spline.
void Ogre::RotationalSpline::updatePoint  (  unsigned short  index, 
const Quaternion &  value  
) 
Updates a single point in the spline.
This point must already exist in the spline.
Quaternion Ogre::RotationalSpline::interpolate  (  Real  t, 
bool  useShortestPath = true 

) 
Returns an interpolated point based on a parametric value over the whole series.
Given a t value between 0 and 1 representing the parametric distance along the whole length of the spline, this method returns an interpolated point.
t  Parametric value. 
useShortestPath  Defines if rotation should take the shortest possible path 
Quaternion Ogre::RotationalSpline::interpolate  (  unsigned int  fromIndex, 
Real  t,  
bool  useShortestPath = true 

) 
Interpolates a single segment of the spline given a parametric value.
fromIndex  The point index to treat as t=0. fromIndex + 1 is deemed to be t=1 
t  Parametric value 
useShortestPath  Defines if rotation should take the shortest possible path 
void Ogre::RotationalSpline::setAutoCalculate  (  bool  autoCalc  ) 
Tells the spline whether it should automatically calculate tangents on demand as points are added.
The spline calculates tangents at each point automatically based on the input points. Normally it does this every time a point changes. However, if you have a lot of points to add in one go, you probably don't want to incur this overhead and would prefer to defer the calculation until you are finished setting all the points. You can do this by calling this method with a parameter of 'false'. Just remember to manually call the recalcTangents method when you are done.
autoCalc  If true, tangents are calculated for you whenever a point changes. If false, you must call reclacTangents to recalculate them when it best suits. 
void Ogre::RotationalSpline::recalcTangents  (  void  ) 
Recalculates the tangents associated with this spline.
If you tell the spline not to update on demand by calling setAutoCalculate(false) then you must call this after completing your updates to the spline points.