For some reason I had a Bob Seger sound bouncing around in my head when I wrote that title.
Anyway… Things are not going flawlessly at the first attempt.. Go figure
I need to look at the unaltered code to see if I messed something in the copy and paste.
http://free-cad.git.sourceforge.net/git/gitweb.cgi?p=free-cad/free-cad;a=blob;f=src/Mod/Sketcher/Gui/CommandCreateGeo.cpp;h=89685e99abed69ba4611dd763f40c4695f2c26bc;hb=HEAD
It seems like I got keyArcPressed() working ok as intended,
Just to get going on this, I copied sections of from DrawSketchHandlerArc::mouseMove into the conditional testing keyArcPressed(). This shouldn’t work but at least it a place to get started.
Within DrawSketchHandlerLineSet
virtual void mouseMove(Base::Vector2D onSketchPos)
{
setPositionText(onSketchPos);
if (Mode==STATUS_SEEK_First) {
if (seekAutoConstraint(sugConstr1, onSketchPos, Base::Vector2D(0.f,0.f))) {
renderSuggestConstraintsCursor(sugConstr1);
return;
}
}
else if (Mode==STATUS_SEEK_Second){
if (keyArcPressed()){//Draw an Arc
float dx_ = onSketchPos.fX – EditCurve[0].fX;
float dy_ = onSketchPos.fY – EditCurve[0].fY;
for (int i=0; i < 16; i++) {
float angle = i*M_PI/16.0;
float dx = dx_ * cos(angle) + dy_ * sin(angle);
float dy = -dx_ * sin(angle) + dy_ * cos(angle);
EditCurve[1+i] = Base::Vector2D(EditCurve[0].fX + dx, EditCurve[0].fY + dy);
EditCurve[17+i] = Base::Vector2D(EditCurve[0].fX – dx, EditCurve[0].fY – dy);
}
EditCurve[33] = EditCurve[1];
sketchgui->drawEdit(EditCurve);
if (seekAutoConstraint(sugConstr2, onSketchPos, Base::Vector2D(0.f,0.f))) {
renderSuggestConstraintsCursor(sugConstr2);
return;
}
}else{//Draw a line
EditCurve[1] = onSketchPos;
sketchgui->drawEdit(EditCurve);
if (seekAutoConstraint(sugConstr2, onSketchPos, onSketchPos – EditCurve[0])) {
renderSuggestConstraintsCursor(sugConstr2);
return;
}}
}
applyCursor();
}
———————
It seems this will cause a segmentation fault:
The inferior stopped because it received a signal from the Operating System.
| Signal name : | SIGSEGV |
| Signal meaning : | Segmentation fault |
———————-
0 QHashData::nextNode(QHashData::Node*) /usr/lib/libQtCore.so.4 0 0x7ffff1507673
1 QApplication::allWidgets() /usr/lib/libQtGui.so.4 0 0x7ffff269bfcc
2 QApplication::setOverrideCursor(QCursor const&) /usr/lib/libQtGui.so.4 0 0x7ffff2713d17
3 Gui::WaitCursorP::setBusy WaitCursor.cpp 80 0x7ffff756d1ec
4 Gui::WaitCursor::setWaitCursor WaitCursor.cpp 161 0x7ffff756d580
5 WaitCursor WaitCursor.cpp 146 0x7ffff756d4dc
6 Gui::Command::updateActive Command.cpp 455 0x7ffff757968b
7 DrawSketchHandlerLineSet::releaseButton CommandCreateGeo.cpp 628 0x7fffd5f1d036
8 SketcherGui::ViewProviderSketch::mouseButtonPressed ViewProviderSketch.cpp 589 0x7fffd5f47a94
9 Gui::ViewProvider::eventCallback ViewProvider.cpp 195 0x7ffff779a1f6
10 SoEventCallback::handleEvent(SoHandleEventAction*) /usr/lib/libCoin.so.60 0 0x7ffff51c3e0b
11 SoNode::handleEventS(SoAction*, SoNode*) /usr/lib/libCoin.so.60 0 0x7ffff51dcda7
12 SoAction::traverse(SoNode*) /usr/lib/libCoin.so.60 0 0x7ffff4fa44f7
13 SoChildList::traverse(SoAction*, int, int) /usr/lib/libCoin.so.60 0 0x7ffff50f8ded
14 SoGroup::doAction(SoAction*) /usr/lib/libCoin.so.60 0 0x7ffff51cffbb
15 SoSeparator::doAction(SoAction*) /usr/lib/libCoin.so.60 0 0x7ffff51f393f
16 Gui::SoFCUnifiedSelection::handleEvent SoFCUnifiedSelection.cpp 322 0x7ffff76f1ef9
17 SoNode::handleEventS(SoAction*, SoNode*) /usr/lib/libCoin.so.60 0 0x7ffff51dcda7
18 SoAction::traverse(SoNode*) /usr/lib/libCoin.so.60 0 0x7ffff4fa44f7
19 SoChildList::traverse(SoAction*, int, int) /usr/lib/libCoin.so.60 0 0x7ffff50f8ded
20 SoGroup::doAction(SoAction*) /usr/lib/libCoin.so.60 0 0x7ffff51cffbb
… <More>
Running out of time here before I need to go to work, but I need to thing about what I need to do for my next steps..
The next goal is figure out what kind of program logic I need to to get some kind of arc going in polyline.
Done is define as not getting seg faults getting an arc to draw in polyline….(Not shooting for tangency at this point)
- Dissect the logic of DrawSketchHandlerArc::mouseMove to understand what’s going on.
- Dissect the logic of DrawSketchHandlerArc::mouseDown to understand what’s going on.
- Dissect the logic(with keyArcPressed= false) of DrawSketchHandlerLineSet::mouseMove to understand what’s going on
- Dissect the logic(with keyArcPressed= false) of DrawSketchHandlerLineSet::mouseDown to understand what’s going on.
- Figure out the next programming step…