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new algorithm for spaceball movements

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*consolidate motion3 event handeling.
*rotation about focal point.
*translation based on world to screen scale.
*cleanup axes map and constants.
This commit is contained in:
tanderson
2012-02-28 10:42:17 -05:00
parent c3647b3baa
commit 9ffdfbe485
7 changed files with 61 additions and 69 deletions
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31
src/Gui/NavigationStyle.cpp
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@@ -1140,6 +1140,37 @@ SbBool NavigationStyle::processSoEvent(const SoEvent * const ev)
return viewer->processSoEventBase(ev);
}
SbBool NavigationStyle::processMotionEvent(const SoMotion3Event * const ev)
{
SoCamera * const camera = viewer->getCamera();
if (!camera)
return FALSE;
SbViewVolume volume(camera->getViewVolume());
SbVec3f center(volume.getSightPoint(camera->focalDistance.getValue()));
float scale(volume.getWorldToScreenScale(center, 1.0));
float translationFactor = scale * .0001;
SbVec3f dir = ev->getTranslation();
if (camera->getTypeId().isDerivedFrom(SoOrthographicCamera::getClassTypeId())){
SoOrthographicCamera *oCam = static_cast<SoOrthographicCamera *>(camera);
oCam->scaleHeight(1.0 + (dir[2] * 0.0001));
dir[2] = 0.0;//don't move the cam for z translation.
}
SbRotation newRotation(ev->getRotation() * camera->orientation.getValue());
SbVec3f newPosition, newDirection;
newRotation.multVec(SbVec3f(0.0, 0.0, -1.0), newDirection);
newPosition = center - (newDirection * camera->focalDistance.getValue());
camera->orientation.setValue(newRotation);
camera->orientation.getValue().multVec(dir,dir);
camera->position = newPosition + (dir * translationFactor);
return TRUE;
}
void NavigationStyle::setPopupMenuEnabled(const SbBool on)
{
this->menuenabled = on;