Tulip  5.1.0
Large graphs analysis and drawing
tlp::GlSceneZoomAndPan Class Reference

#include <GlSceneZoomAndPan.h>

+ Inheritance diagram for tlp::GlSceneZoomAndPan:
+ Collaboration diagram for tlp::GlSceneZoomAndPan:

Public Member Functions

 GlSceneZoomAndPan (GlScene *glScene, const BoundingBox &boundingBox, const std::string &layerName="Main", const int nbAnimationSteps=50, const bool optimalPath=true, const double p=sqrt(1.6))
int getNbAnimationsStep () const
void setAdditionalGlSceneAnimation (AdditionalGlSceneAnimation *additionalAnimation)
void setNbAnimationSteps (const int nbAnimationSteps)
void zoomAndPanAnimationStep (int animationStep)

Protected Attributes

double b0
double b1
Coord camCenterEnd
Coord camCenterStart
bool doZoomAndPan
int nbAnimationSteps
bool optimalPath
double p
double r0
double r1
double S
double sA
double sB
double u0
double u1
Vector< int, 4 > viewport
double w0
double w1
double wm
float zoomAreaHeight
float zoomAreaWidth

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: http://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-gui library instead to perform the animation.

Definition at line 71 of file GlSceneZoomAndPan.h.

Constructor & Destructor Documentation

tlp::GlSceneZoomAndPan::GlSceneZoomAndPan ( GlScene glScene,
const BoundingBox boundingBox,
const std::string &  layerName = "Main",
const int  nbAnimationSteps = 50,
const bool  optimalPath = true,
const double  p = sqrt(1.6) 

GlSceneZoomAndPan constructor

glScenethe Tulip OpenGL scene on which to perform zooming and panning
boundingBoxthe 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.
layerNameThe name of the layer animation should be done on
nbAnimationStepsthe number of steps to perform during the animation
optimalPathif 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
pzoom/pan trade-off parameter, adjust it according to your needs

Member Function Documentation

int tlp::GlSceneZoomAndPan::getNbAnimationsStep ( ) const

Method which return the number of animation steps

Definition at line 100 of file GlSceneZoomAndPan.h.

void tlp::GlSceneZoomAndPan::setAdditionalGlSceneAnimation ( AdditionalGlSceneAnimation additionalAnimation)

Method to add an additional scene animation while zooming and panning

additionalAnimationThe animation to add
void tlp::GlSceneZoomAndPan::setNbAnimationSteps ( const int  nbAnimationSteps)

Method to set the number of animation steps

Definition at line 107 of file GlSceneZoomAndPan.h.

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