bool
intersect( const SbVec3f& p0, const SbVec3f& p1,
const SbVec3f& q0, const SbVec3f& q1,
SbVec3f& intersectPoint )
{
if( SbLine(p0, p1).getClosestPoints( SbLine(q0, q1), intersectPoint, intersectPoint ) )
{
return belongToSegment( intersectPoint, p0, p1 ) &&
belongToSegment( intersectPoint, q0, q1 );
}
return false;
}
void TranslateRadialDragger::
dragStart()
{
// Display the 'active' parts...
SoSwitch *sw;
sw = SO_GET_ANY_PART(this, "translatorSwitch", SoSwitch);
setSwitchValue(sw, 1);
sw = SO_GET_ANY_PART(this, "feedbackSwitch", SoSwitch);
setSwitchValue(sw, 1);
// Establish the projector line.
// The direction of translation goes from the center of the
// dragger toward the point that was hit, in local space.
// For the center, use (0,0,0).
SbVec3f startLocalHitPt = getLocalStartingPoint();
lineProj->setLine(SbLine(SbVec3f(0, 0, 0), startLocalHitPt));
// orient the feedback geometry.
orientFeedbackGeometry(startLocalHitPt);
}
SbLineProjector::SbLineProjector()
{
setLine(SbLine(SbVec3f(0,0,0), SbVec3f(0,1,0)));
}
/*! \COININTERNAL
Called when dragger is selected (picked) by the user.
*/
void
SoHandleBoxDragger::dragStart(void)
{
SoHandleBoxDragger_invalidate_surroundscale(this);
static const char translatorname[] = "translator";
static const char extrudername[] = "extruder";
static const char uniformname[] = "uniform";
const SoPath *pickpath = this->getPickPath();
SbBool found = FALSE;
this->whatkind = WHATKIND_NONE;
this->whatnum = 0;
int i;
SbString str;
if (!found) {
for (i = 1; i <= 6; i++) {
str.sprintf("%s%d", translatorname, i);
if (pickpath->findNode(this->getNodeFieldNode(str.getString())) >= 0||
this->getSurrogatePartPickedName() == str.getString()) break;
}
if (i <= 6) {
found = TRUE;
this->whatkind = WHATKIND_TRANSLATOR;
this->whatnum = i;
}
}
if (!found) {
for (i = 1; i <= 6; i++) {
str.sprintf("%s%d", extrudername, i);
if (pickpath->findNode(this->getNodeFieldNode(str.getString()))>= 0 ||
this->getSurrogatePartPickedName() == str.getString()) break;
}
if (i <= 6) {
found = TRUE;
this->whatkind = WHATKIND_EXTRUDER;
this->whatnum = i;
}
}
if (!found) {
for (i = 1; i <= 8; i++) {
str.sprintf("%s%d", uniformname, i);
if (pickpath->findNode(this->getNodeFieldNode(str.getString()))>= 0 ||
this->getSurrogatePartPickedName() == str.getString()) break;
}
if (i <= 8) {
found = TRUE;
this->whatkind = WHATKIND_UNIFORM;
this->whatnum = i;
}
}
assert(found);
if (!found) return;
SbVec3f startPt = this->getLocalStartingPoint();
switch(this->whatkind) {
case WHATKIND_TRANSLATOR:
{
SbVec3f n;
if (this->whatnum <= 2) {
n = SbVec3f(0.0f, 1.0f, 0.0f);
}
else if (this->whatnum <= 4) {
n = SbVec3f(1.0f, 0.0f, 0.0f);
}
else {
n = SbVec3f(0.0f, 0.0f, 1.0f);
}
SbVec3f localPt;
{
SbMatrix mat, inv;
this->getSurroundScaleMatrices(mat, inv);
inv.multVecMatrix(startPt, localPt);
}
this->planeProj->setPlane(SbPlane(n, startPt));
SbLine myline(SbVec3f(0.0f, 0.0f, 0.0f), n);
SoTranslation *t = SO_GET_ANY_PART(this, "arrowTranslation", SoTranslation);
t->translation = myline.getClosestPoint(localPt);
if (this->getEvent()->wasShiftDown()) {
this->getLocalToWorldMatrix().multVecMatrix(startPt, this->worldRestartPt);
this->constraintState = CONSTRAINT_WAIT;
}
}
break;
case WHATKIND_EXTRUDER:
this->lineProj->setLine(SbLine(this->getDraggerCenter(), startPt));
this->ctrlOffset = this->calcCtrlOffset(startPt);
break;
case WHATKIND_UNIFORM:
this->lineProj->setLine(SbLine(this->getDraggerCenter(), startPt));
this->ctrlOffset = this->calcCtrlOffset(startPt);
break;
}
this->ctrlDown = this->getEvent()->wasCtrlDown();
this->updateSwitches();
}
void
SoDragPointDragger::metaKeyChangeCB( void *, SoDragger *inDragger )
//
////////////////////////////////////////////////////////////////////////
{
SoDragPointDragger *dp = (SoDragPointDragger *) inDragger;
SoHandleEventAction *ha = dp->getHandleEventAction();
// We care if the shift key is down for drawing feedback.
const SoEvent *event = dp->getEvent();
dp->shftDown = event->wasShiftDown();
// Don't check for grabber yet.
// CONTROL key press overrides if the grabber is a childDragger.
// [1] We only respond to CONTROL key press events.
if ( !SO_KEY_PRESS_EVENT(event, LEFT_CONTROL) &&
!SO_KEY_PRESS_EVENT(event, RIGHT_CONTROL))
return;
//[2] Should we return?
// Stay here if there's no grabber and the mouse is over us,
// or over a surrogate part.
// Stay here if we are the grabber.
// Stay here if our currentDragger is grabbing events.
// Return if anyone else is grabbing.
SbBool takeIt = FALSE;
if ( ha->getGrabber() == NULL ) {
// grabber is NULL...
const SoPickedPoint *p = ha->getPickedPoint();
if ( p && p->getPath()) {
// Are we on the pickPath?
// Or is the path a surrogate path for us or any draggers
// contained within us?
if ( p->getPath()->containsNode(dp) ||
dp->isPathSurrogateInMySubgraph(p->getPath()) )
takeIt = TRUE;
}
}
else if ( ha->getGrabber() == dp )
takeIt = TRUE;
else if ( ha->getGrabber() == dp->currentDragger )
takeIt = TRUE;
else
takeIt = FALSE;
if ( !takeIt )
return;
//[3] Now, switch the set of visible draggers...
dp->showNextDraggerSet();
//[4] If a child is grabbing, release events and hand it all over to
// the next one...
SoDragger *oldDragger = dp->currentDragger;
if (oldDragger) {
// Ref the oldDragger.
oldDragger->ref();
// Release the grabber. This will call grabEventsCleanUp() if
// the grabber is a dragger.
ha->releaseGrabber();
// If there was an oldDragger,
// [a] select a new dragger to grab events.
// [b] Set up a plane or line projector oriented like newDragger.
// [c] Find out where current mouse position intersects that new
// plane or line. The new gesture will continue from there.
SoDragger *newDragger;
SbVec3f projPt;
SbLineProjector lp;
SbPlaneProjector pp;
lp.setViewVolume( dp->getViewVolume() );
pp.setViewVolume( dp->getViewVolume() );
lp.setWorkingSpace( dp->getLocalToWorldMatrix() );
pp.setWorkingSpace( dp->getLocalToWorldMatrix() );
if ( oldDragger == dp->xTranslator.getValue() ) {
newDragger = (SoDragger *) dp->yTranslator.getValue();
lp.setLine( SbLine( SbVec3f(0,0,0), SbVec3f(0,1,0)));
projPt = lp.project(dp->getNormalizedLocaterPosition());
}
else if ( oldDragger == dp->yTranslator.getValue() ) {
newDragger = (SoDragger *) dp->zTranslator.getValue();
lp.setLine( SbLine( SbVec3f(0,0,0), SbVec3f(0,0,1)));
projPt = lp.project(dp->getNormalizedLocaterPosition());
}
else if ( oldDragger == dp->zTranslator.getValue() ) {
newDragger = (SoDragger *) dp->xTranslator.getValue();
lp.setLine( SbLine( SbVec3f(0,0,0), SbVec3f(1,0,0)));
projPt = lp.project(dp->getNormalizedLocaterPosition());
}
else if ( oldDragger == dp->yzTranslator.getValue() ) {
newDragger = (SoDragger *) dp->xzTranslator.getValue();
pp.setPlane( SbPlane( SbVec3f(0,1,0), SbVec3f(0,0,0)));
projPt = pp.project(dp->getNormalizedLocaterPosition());
}
else if ( oldDragger == dp->xzTranslator.getValue() ) {
newDragger = (SoDragger *) dp->xyTranslator.getValue();
pp.setPlane( SbPlane( SbVec3f(0,0,1), SbVec3f(0,0,0)));
projPt = pp.project(dp->getNormalizedLocaterPosition());
}
else if ( oldDragger == dp->xyTranslator.getValue() ) {
newDragger = (SoDragger *) dp->yzTranslator.getValue();
pp.setPlane( SbPlane( SbVec3f(1,0,0), SbVec3f(0,0,0)));
projPt = pp.project(dp->getNormalizedLocaterPosition());
}
// unref oldDragger. We don't need it any more.
oldDragger->unref();
// Give newDragger our handleEvent action.
newDragger->setHandleEventAction(ha);
// Cast the projPt into world space for the new starting point.
dp->getLocalToWorldMatrix().multVecMatrix(projPt,projPt);
newDragger->setStartingPoint( projPt );
// Give the newDragger a path to itself
SoPath *pathToDragger;
// We must ref() & unref() dpThisPath to dispose of it.
SoPath *dpThisPath = dp->createPathToThis();
if (dpThisPath) dpThisPath->ref();
pathToDragger = dp->createPathToPart(
dp->getPartString(newDragger), TRUE, dpThisPath );
if (dpThisPath) dpThisPath->unref();
if (pathToDragger)
pathToDragger->ref();
newDragger->setTempPathToThis( pathToDragger );
if (pathToDragger)
pathToDragger->unref();
// Give the newDragger our viewing information.
newDragger->setViewVolume(dp->getViewVolume());
newDragger->setViewportRegion(dp->getViewportRegion());
// Set the grabber. This will call starting callbacks on the new
// grabber, as well as it's registered parent, moi!
ha->setGrabber( newDragger );
}
//[5] set handled
ha->setHandled();
}