void Line::setLine(const Point& start, float angle, uint width, uint height)
{
m_start = start;
m_angle = angle;
// find where line intersects edge of canvas
while(angle < 0) angle += 360;
angle = int(angle + 0.5) % 360;
Line lineVec(m_start, m_start.offset(angle));
Point intersection;
if(angle >= 0 && angle < 90)
{
intersection = Geometry::verticalIntersect(lineVec, width-1);
Point test = Geometry::horizontalIntersect(lineVec, height-1);
if(test.x() < intersection.x())
intersection = test;
}
else if(angle >= 90 && angle < 180)
{
intersection = Geometry::verticalIntersect(lineVec, 0);
Point test = Geometry::horizontalIntersect(lineVec, height-1);
if(test.x() > intersection.x() || intersection.x() == std::numeric_limits<float>::max())
intersection = test;
}
else if(angle >= 180 && angle < 270)
{
intersection = Geometry::verticalIntersect(lineVec, 0);
Point test = Geometry::horizontalIntersect(lineVec, 0);
if(test.x() > intersection.x() && test.x() != std::numeric_limits<float>::max())
intersection = test;
}
else if(angle >= 270 && angle < 360)
{
intersection = Geometry::verticalIntersect(lineVec, width-1);
Point test = Geometry::horizontalIntersect(lineVec, 0);
if(test.x() < intersection.x())
intersection = test;
}
m_start = start;
m_end = intersection;
}
void AcDbDoubleClickEditPline::startEdit(AcDbEntity *pEnt, AcGePoint3d clickpt)
{
// Implement the startEdit notification handler to catch when
// a user double-clicks a 'POLYLINE' entity
// Get the Current Document
AcApDocument *pDoc=acDocManager->curDocument();
AcDbPolyline *pLine;
// Cast the AcDbEntity pointer to AcDbPolyline
if(pEnt->isKindOf(AcDbPolyline::desc()) == Adesk::kTrue)
pLine=AcDbPolyline::cast(pEnt);
else
{
acutPrintf("Error: Invalid AcDbPolyline Object");
return;
}
acDocManager->lockDocument(pDoc,AcAp::kWrite);
// Upgrade to write
if(pLine->upgradeOpen()!=Acad::eOk)
{
acutPrintf("Error: Could Not open AcDbPolyline Object");
return;
}
// iterate through all the vertices to find which
// segment was clicked on, and place a vertex there.
for(unsigned int c=0;c<pLine->numVerts()-1;c++)
{
AcGePoint3d pt1,pt2;
pLine->getPointAt(c,pt1);
pLine->getPointAt(c+1,pt2);
AcGeVector3d lineVec(pt2-pt1),clickVec(clickpt-pt1),
clickVec2(pt2-clickpt);
double ang=lineVec.angleTo(clickVec);
// This is the filter...
// .05 (5% of lineVec length) is an arbitrary length...
if((sin(ang)*clickVec.length()<.05*lineVec.length()) &&
clickVec.length()<lineVec.length() &&
clickVec2.length()<lineVec.length())
{
// Add the point Here!
ads_point outPt;
acdbWcs2Ecs(asDblArray(clickpt),outPt,asDblArray(pLine->normal()),Adesk::kFalse);
pLine->addVertexAt(c+1,asPnt2d(outPt));
break;
}
}
pLine->close();
acDocManager->unlockDocument(pDoc);
// invoking acedSSSetFirst(NULL,NULL) here will clear the
// pickfirst selection, if desired (not With pline though).
//acedSSSetFirst(NULL,NULL);
// Update the graphics...
pLine->draw();
actrTransactionManager->flushGraphics();
acedUpdateDisplay();
}