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# tlp::GlSceneZoomAndPan Class Reference `#include <GlSceneZoomAndPan.h>` Collaboration diagram for tlp::GlSceneZoomAndPan: [legend] List of all members. ## Detailed Description A convenient class to perform Zoom and Pan animation on Tulip OpenGL scene. This class allow to perform a smooth and efficient zooming and panning on Tulip OpenGL scene. The algorithm used to perform this task is the one published in : Jarke J. van Wijk and Wim A.A. Nuij, "Smooth and efficient zooming and panning" For more details, the paper can be downloaded at the following url : www.win.tue.nl/~vanwijk/zoompan.pdf Even if this class contains the whole Zoom and Pan implementation, it is not aimed to be used directly because its role is only to compute new camera parameters. Use the derived class QtGlSceneZoomAndPanAnimator in the tulip-qt library instead to perform the animation. ## Public Member Functions GlSceneZoomAndPan (GlScene *glScene, const BoundingBox &boundingBox, const int nbAnimationSteps=50, const bool optimalPath=true, const double p=sqrt(1.6)) void setAdditionalGlSceneAnimation (AdditionalGlSceneAnimation *additionalAnimation) int getNbAnimationsStep () const void setNbAnimationSteps (const int nbAnimationSteps) void zoomAndPanAnimationStep (int animationStep) ## Protected Attributes Camera * camera Vector< int, 4 > viewport int nbAnimationSteps bool optimalPath double p Coord camCenterStart Coord camCenterEnd double w0 double w1 double u0 double u1 double b0 double b1 double r0 double r1 double S double sA double sB double wm AdditionalGlSceneAnimation * additionalAnimation bool doZoomAndPan ## Constructor & Destructor Documentation
tlp::GlSceneZoomAndPan::GlSceneZoomAndPan | ( | GlScene * | glScene,
|  | const BoundingBox & | boundingBox,
|  | const int | nbAnimationSteps = `50`,
|  | const bool | optimalPath = `true`,
|  | const double | p = `sqrt(1.6)`
| ) |
  | GlSceneZoomAndPan constructor Parameters:
  | glScene | the Tulip OpenGL scene on which to perform zooming and panning
  | boundingBox | the bounding box in scene coordinates on which the Tulip OpenGL scene has to be zoomed and panned. At the end of the animation, the viewport will be zoomed and centered on the content of that bounding box.
  | nbAnimationSteps | the number of steps to perform during the animation
  | optimalPath | if true zooming and panning will be combined at each step of the animation, if false the scene will be zoomed out/in, panned then zoomed in/out
  | p | zoom/pan trade-off parameter, adjust it according to your needs
## Member Function Documentation
int tlp::GlSceneZoomAndPan::getNbAnimationsStep | ( |  | ) | const`[inline]`
| Method which return the number of animation steps
void tlp::GlSceneZoomAndPan::setAdditionalGlSceneAnimation | ( | AdditionalGlSceneAnimation * | additionalAnimation | ) |
  | Method to add an additional scene animation while zooming and panning Parameters:
  | additionalAnimation | The animation to add
void tlp::GlSceneZoomAndPan::setNbAnimationSteps | ( | const int | nbAnimationSteps | ) | `[inline]`
| Method to set the number of animation steps
void tlp::GlSceneZoomAndPan::zoomAndPanAnimationStep | ( | int | animationStep | ) |
| Method which performs the zoom and pan animation. Its role is to compute new camera parameters at step animationStep. The scene is not redrawn with this method, you have to call the draw method on the associated GlScene object
## Member Data Documentation
AdditionalGlSceneAnimation* tlp::GlSceneZoomAndPan::additionalAnimation`[protected]`
double tlp::GlSceneZoomAndPan::b0`[protected]`
double tlp::GlSceneZoomAndPan::b1`[protected]`
Coord tlp::GlSceneZoomAndPan::camCenterEnd`[protected]`
Coord tlp::GlSceneZoomAndPan::camCenterStart`[protected]`
Camera* tlp::GlSceneZoomAndPan::camera`[protected]`
bool tlp::GlSceneZoomAndPan::doZoomAndPan`[protected]`
int tlp::GlSceneZoomAndPan::nbAnimationSteps`[protected]`
bool tlp::GlSceneZoomAndPan::optimalPath`[protected]`
double tlp::GlSceneZoomAndPan::p`[protected]`
double tlp::GlSceneZoomAndPan::r0`[protected]`
double tlp::GlSceneZoomAndPan::r1`[protected]`
double tlp::GlSceneZoomAndPan::S`[protected]`
double tlp::GlSceneZoomAndPan::sA`[protected]`
double tlp::GlSceneZoomAndPan::sB`[protected]`
double tlp::GlSceneZoomAndPan::u0`[protected]`
double tlp::GlSceneZoomAndPan::u1`[protected]`
Vector<int, 4> tlp::GlSceneZoomAndPan::viewport`[protected]`
double tlp::GlSceneZoomAndPan::w0`[protected]`
double tlp::GlSceneZoomAndPan::w1`[protected]`
double tlp::GlSceneZoomAndPan::wm`[protected]`

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