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Implement drag-at-cursor

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This commit is contained in:
wmayer 2013-05-14 14:53:13 +02:00
parent 5639f22f8e
commit 941dcbf6fc
1 changed files with 40 additions and 0 deletions
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40
src/Gui/NavigationStyle.cpp
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@ -52,6 +52,9 @@ struct NavigationStyleP {
int animationsteps;
int animationdelta;
SbVec3f focal1, focal2;
SbVec3f startDragPoint;
SbBool dragPointFound;
SbBool dragAtCursor;
SbRotation endRotation;
SoTimerSensor * animsensor;
float sensitivity;
@ -62,6 +65,8 @@ struct NavigationStyleP {
this->animationsteps = 0;
this->sensitivity = 2.0f;
this->resetcursorpos = FALSE;
this->dragPointFound = FALSE;
this->dragAtCursor = FALSE;
}
static void viewAnimationCB(void * data, SoSensor * sensor);
};
@ -323,6 +328,7 @@ void NavigationStyle::lookAtPoint(const SbVec3f& pos)
{
SoCamera* cam = viewer->getCamera();
if (cam == 0) return;
PRIVATE(this)->dragPointFound = FALSE;
// Find global coordinates of focal point.
SbVec3f direction;
@ -643,6 +649,7 @@ void NavigationStyle::panToCenter(const SbPlane & pplane, const SbVec2f & currpo
const SbViewportRegion & vp = viewer->getViewportRegion();
float ratio = vp.getViewportAspectRatio();
panCamera(viewer->getCamera(), ratio, pplane, SbVec2f(0.5,0.5), currpos);
PRIVATE(this)->dragPointFound = FALSE;
}
/** Dependent on the camera type this will either shrink or expand the
@ -781,6 +788,15 @@ void NavigationStyle::spin(const SbVec2f & pointerpos)
lastpos[0] = float(this->log.position[1][0]) / float(SoQtMax((int)(glsize[0]-1), 1));
lastpos[1] = float(this->log.position[1][1]) / float(SoQtMax((int)(glsize[1]-1), 1));
if (PRIVATE(this)->dragAtCursor && PRIVATE(this)->dragPointFound) {
SbVec3f hitpoint = PRIVATE(this)->startDragPoint;
// set to the given position
SbVec3f direction;
viewer->getCamera()->orientation.getValue().multVec(SbVec3f(0, 0, -1), direction);
viewer->getCamera()->position = hitpoint - viewer->getCamera()->focalDistance.getValue() * direction;
}
// 0000333: Turntable camera rotation
SbMatrix mat;
viewer->getCamera()->orientation.getValue().getValue(mat);
@ -800,6 +816,16 @@ void NavigationStyle::spin(const SbVec2f & pointerpos)
r.invert();
this->reorientCamera(viewer->getCamera(), r);
if (PRIVATE(this)->dragAtCursor && PRIVATE(this)->dragPointFound) {
float ratio = vp.getViewportAspectRatio();
SbViewVolume vv = viewer->getCamera()->getViewVolume(vp.getViewportAspectRatio());
SbPlane panplane = vv.getPlane(viewer->getCamera()->focalDistance.getValue());
SbVec2f posn;
posn[0] = float(this->localPos[0]) / float(SoQtMax((int)(glsize[0]-1), 1));
posn[1] = float(this->localPos[1]) / float(SoQtMax((int)(glsize[1]-1), 1));
panCamera(viewer->getCamera(), ratio, panplane, posn, SbVec2f(0.5,0.5));
}
// Calculate an average angle magnitude value to make the transition
// to a possible spin animation mode appear smooth.
@ -855,6 +881,20 @@ void NavigationStyle::saveCursorPosition(const SoEvent * const ev)
{
this->globalPos.setValue(QCursor::pos().x(), QCursor::pos().y());
this->localPos = ev->getPosition();
// get the 3d point to the screen position, if possible
if (PRIVATE(this)->dragAtCursor) {
SoRayPickAction rpaction(viewer->getViewportRegion());
rpaction.setPoint(this->localPos);
rpaction.setRadius(2);
rpaction.apply(viewer->getSceneManager()->getSceneGraph());
SoPickedPoint * picked = rpaction.getPickedPoint();
if (picked) {
PRIVATE(this)->dragPointFound = TRUE;
PRIVATE(this)->startDragPoint = picked->getPoint();
}
}
}
void NavigationStyle::moveCursorPosition()