////////////////////////////////////////////////////////////////////////
//
// Description:
// Rotate the rotateDiscDragger based on mouse motion.
//
// Use: private
//
void
SoRotateDiscDragger::drag()
//
////////////////////////////////////////////////////////////////////////
{
// Set up the projector space and view.
// Working space is space at end of motion matrix.
planeProj->setViewVolume( getViewVolume() );
planeProj->setWorkingSpace( getLocalToWorldMatrix() );
// Get newHitPt and startHitPt in workspace.
SbVec3f newHitPt
= planeProj->project( getNormalizedLocaterPosition());
SbVec3f startHitPt = getLocalStartingPoint();
// Find the amount of rotation
SbVec3f oldVec = startHitPt;
SbVec3f newVec = newHitPt;
// Remove the part of these vectors that is parallel to the normal
oldVec -= SbVec3f( 0, 0, oldVec[2] );
newVec -= SbVec3f( 0, 0, newVec[2] );
// deltaRot is how much we rotated since the mouse button went down.
SbRotation deltaRot = SbRotation( oldVec, newVec );
// Append this to the startMotionMatrix, which we saved at the beginning
// of the drag, to find the current motion matrix.
setMotionMatrix(
appendRotation( getStartMotionMatrix(), deltaRot, SbVec3f(0,0,0)));
}
////////////////////////////////////////////////////////////////////////
//
// Description:
// Stretch the dragger according to the motion along the plane
// projector
//
// Use: private
//
void
SoTranslate2Dragger::drag()
//
////////////////////////////////////////////////////////////////////////
{
// Set up the projector space and view.
// Working space is space at end of motion matrix.
planeProj->setViewVolume( getViewVolume() );
planeProj->setWorkingSpace( getLocalToWorldMatrix() );
// Get newHitPt and startHitPt in workspace.
SbVec3f newHitPt = planeProj->project( getNormalizedLocaterPosition());
SbVec3f startHitPt = getLocalStartingPoint();
// Convert newHitPt to world space and save this as our new worldRestartPt
getLocalToWorldMatrix().multVecMatrix( newHitPt, worldRestartPt );
// Figure out the translation relative to start position.
SbVec3f motion = newHitPt - startHitPt;
// Maybe we need to constrain the motion...
if ( !shftDown )
translateDir = -1;
else {
// The shift key is pressed. This means 1-D translation.
if ( translateDir == -1 ) {
// The 1-D direction is not defined. Calculate it based on which
// direction got the maximum locater motion.
if ( isAdequateConstraintMotion() ) {
if ( fabs( motion[0]) > fabs( motion[1]))
translateDir = 0;
else
translateDir = 1;
// Set the axis feedback switch to the given direction.
setSwitchValue( axisFeedbackSwitch.getValue(), translateDir );
}
else {
// Not ready to pick a direction yet. Don't move.
return;
}
}
// get the projection of 'motion' onto the preferred axis.
SbVec3f constrainedMotion(0,0,0);
constrainedMotion[translateDir] = motion[translateDir];
motion = constrainedMotion;
}
// Append this to the startMotionMatrix, which we saved at the beginning
// of the drag, to find the current motion matrix.
setMotionMatrix( appendTranslation( getStartMotionMatrix(), motion ) );
}
void TranslateRadialDragger::
drag()
{
// Things can change between renderings. To be safe, update
// the projector with the current values.
lineProj->setViewVolume(getViewVolume());
lineProj->setWorkingSpace(getLocalToWorldMatrix());
// Find the new intersection on the projector.
SbVec3f newHitPt
= lineProj->project(getNormalizedLocaterPosition());
// Get initial point expressed in our current local space.
SbVec3f startHitPt = getLocalStartingPoint();
// Motion in local space is difference between old and
// new positions.
SbVec3f motion = newHitPt - startHitPt;
// Append this to the startMotionMatrix, which was saved
// automatically at the beginning of the drag, to find
// the current motion matrix.
setMotionMatrix( appendTranslation(getStartMotionMatrix(), motion));
}
////////////////////////////////////////////////////////////////////////
//
// Description:
// Sets the feedback geometry depending on which dragger is active.
// A 1-D translator results in that line's feedback turning on.
// A 2-D translator results in that plane's feedback turning on.
//
// Use: private
//
void
SoDragPointDragger::setFeedbackGeometry()
//
////////////////////////////////////////////////////////////////////////
{
// First, figure out if we need to know a constrained translation
// direction. This happens if a plane dragger is in use, but is
// being constrained.
int translateDir = -1;
#define TINY .0001
if ( shftDown ) {
SbVec3f current = getMotionMatrix()[3];
SbVec3f start = getStartMotionMatrix()[3];
SbVec3f motion = current - start;
if ( fabs( motion[0]) > fabs( motion[1])
&& fabs( motion[0]) > fabs( motion[2]))
translateDir = 0;
else if ( fabs( motion[1]) > fabs( motion[2]))
translateDir = 1;
else if ( fabs( motion[2] ) > TINY )
translateDir = 2;
}
#undef TINY
// Turn on appropriate parts, based on state.
if (currentDragger == NULL) {
setSwitchValue(xFeedbackSwitch.getValue(), SO_SWITCH_NONE );
setSwitchValue(yFeedbackSwitch.getValue(), SO_SWITCH_NONE );
setSwitchValue(zFeedbackSwitch.getValue(), SO_SWITCH_NONE );
setSwitchValue(planeFeedbackSwitch.getValue(), SO_SWITCH_NONE );
}
else if (currentDragger == xTranslator.getValue() ) {
setSwitchValue(xFeedbackSwitch.getValue(), 0 );
setSwitchValue(yFeedbackSwitch.getValue(), SO_SWITCH_NONE );
setSwitchValue(zFeedbackSwitch.getValue(), SO_SWITCH_NONE );
setSwitchValue(planeFeedbackSwitch.getValue(), SO_SWITCH_NONE );
}
else if (currentDragger == yTranslator.getValue() ) {
setSwitchValue(xFeedbackSwitch.getValue(), SO_SWITCH_NONE );
setSwitchValue(yFeedbackSwitch.getValue(), 0 );
setSwitchValue(zFeedbackSwitch.getValue(), SO_SWITCH_NONE );
setSwitchValue(planeFeedbackSwitch.getValue(), SO_SWITCH_NONE );
}
else if (currentDragger == zTranslator.getValue() ) {
setSwitchValue(xFeedbackSwitch.getValue(), SO_SWITCH_NONE );
setSwitchValue(yFeedbackSwitch.getValue(), SO_SWITCH_NONE );
setSwitchValue(zFeedbackSwitch.getValue(), 0 );
setSwitchValue(planeFeedbackSwitch.getValue(), SO_SWITCH_NONE );
}
else if (currentDragger == yzTranslator.getValue() ) {
setSwitchValue(xFeedbackSwitch.getValue(), SO_SWITCH_NONE );
if ( translateDir == -1 || translateDir == 1 )
setSwitchValue(yFeedbackSwitch.getValue(), 0 );
else
setSwitchValue(yFeedbackSwitch.getValue(), SO_SWITCH_NONE );
if ( translateDir == -1 || translateDir == 2 )
setSwitchValue(zFeedbackSwitch.getValue(), 0 );
else
setSwitchValue(zFeedbackSwitch.getValue(), SO_SWITCH_NONE );
setSwitchValue(planeFeedbackSwitch.getValue(), 0 );
}
else if (currentDragger == xzTranslator.getValue() ) {
if ( translateDir == -1 || translateDir == 0 )
setSwitchValue(xFeedbackSwitch.getValue(), 0 );
else
setSwitchValue(xFeedbackSwitch.getValue(), SO_SWITCH_NONE );
setSwitchValue(yFeedbackSwitch.getValue(), SO_SWITCH_NONE );
if ( translateDir == -1 || translateDir == 2 )
setSwitchValue(zFeedbackSwitch.getValue(), 0 );
else
setSwitchValue(zFeedbackSwitch.getValue(), SO_SWITCH_NONE );
setSwitchValue(planeFeedbackSwitch.getValue(), 1 );
}
else if (currentDragger == xyTranslator.getValue() ) {
if ( translateDir == -1 || translateDir == 0 )
setSwitchValue(xFeedbackSwitch.getValue(), 0 );
else
setSwitchValue(xFeedbackSwitch.getValue(), SO_SWITCH_NONE );
if ( translateDir == -1 || translateDir == 1 )
setSwitchValue(yFeedbackSwitch.getValue(), 0 );
else
setSwitchValue(yFeedbackSwitch.getValue(), SO_SWITCH_NONE );
setSwitchValue(zFeedbackSwitch.getValue(), SO_SWITCH_NONE );
setSwitchValue(planeFeedbackSwitch.getValue(), 2 );
}
checkBoxLimits();
//**************************************
// Set the transforms for the feedback axes and/or planes.
//**************************************
// First, find the center and scale for each part, in LOCAL space.
// The limit box is defined in a space aligned and scaled as
// LOCAL space, but with it's center remaining fixed in WORLD
// space.
// We need to transform the center of the limitBox
// from WORLD space to LOCAL space to
// find the location of the center of the limit box feedback.
SbMatrix worldToLocal = getWorldToLocalMatrix();
SbVec3f limitBoxCenterInLocal = limitBox.getCenter();
worldToLocal.multVecMatrix( limitBoxCenterInLocal,
limitBoxCenterInLocal );
SbVec3f xAxisSpot = limitBoxCenterInLocal;
SbVec3f yAxisSpot = limitBoxCenterInLocal;
SbVec3f zAxisSpot = limitBoxCenterInLocal;
SbVec3f planeSpot = limitBoxCenterInLocal;
//With center matching mouse location...
// The point under the mouse is stored as 'startLocalHitPt', which is
// expressed in LOCAL space.
xAxisSpot[1] = startLocalHitPt[1];
xAxisSpot[2] = startLocalHitPt[2];
yAxisSpot[0] = startLocalHitPt[0];
yAxisSpot[2] = startLocalHitPt[2];
zAxisSpot[0] = startLocalHitPt[0];
zAxisSpot[1] = startLocalHitPt[1];
if ( currentDragger == yzTranslator.getValue()) {
planeSpot[0] = startLocalHitPt[0];
}
else if ( currentDragger == xzTranslator.getValue()) {
planeSpot[1] = startLocalHitPt[1];
}
else if ( currentDragger == xyTranslator.getValue()) {
planeSpot[2] = startLocalHitPt[2];
}
SoTranslation *transNode;
// Set position of each axis feedback
if ( xFeedbackTranslation.getValue() == NULL )
setAnyPart( "xFeedbackTranslation", new SoTranslation );
transNode = (SoTranslation *) xFeedbackTranslation.getValue();
transNode->translation = xAxisSpot;
if ( yFeedbackTranslation.getValue() == NULL )
setAnyPart( "yFeedbackTranslation", new SoTranslation );
transNode = (SoTranslation *) yFeedbackTranslation.getValue();
transNode->translation = yAxisSpot;
if ( zFeedbackTranslation.getValue() == NULL )
setAnyPart( "zFeedbackTranslation", new SoTranslation );
transNode = (SoTranslation *) zFeedbackTranslation.getValue();
transNode->translation = zAxisSpot;
// Set position of plane feedback
if ( planeFeedbackTranslation.getValue() == NULL )
setAnyPart( "planeFeedbackTranslation", new SoTranslation );
transNode = (SoTranslation *) planeFeedbackTranslation.getValue();
transNode->translation = planeSpot;
}
