def fromStartEndPtsRadius(self, startPt, endPt, radius):
"""
setta le caratteristiche dell'arco attraverso:
punto iniziale
punto finale
raggio
"""
if startPt == endPt or radius <= 0:
return False
chord = qad_utils.getDistance(startPt, endPt)
half_chord = chord / 2
if radius < half_chord:
return False
self.radius = radius
angleSegment = qad_utils.getAngleBy2Pts(startPt, endPt)
ptMiddle = qad_utils.getMiddlePoint(startPt, endPt)
# Pitagora
distFromCenter = math.sqrt((self.radius * self.radius) - (half_chord * half_chord))
# aggiungo 90 gradi
self.center = qad_utils.getPolarPointByPtAngle(ptMiddle, angleSegment + (math.pi / 2), distFromCenter)
self.startAngle = qad_utils.getAngleBy2Pts(self.center, startPt)
self.endAngle = qad_utils.getAngleBy2Pts(self.center, endPt)
return True
def fromStartEndPtsAngle(self, startPt, endPt, angle):
"""
setta le caratteristiche dell'arco attraverso:
punto iniziale
punto finale
angolo inscritto
"""
if startPt == endPt or angle == 0:
return False
chord = qad_utils.getDistance(startPt, endPt)
half_chord = chord / 2
# Teorema della corda
self.radius = half_chord / math.sin(angle / 2)
angleSegment = qad_utils.getAngleBy2Pts(startPt, endPt)
ptMiddle = qad_utils.getMiddlePoint(startPt, endPt)
# Pitagora
distFromCenter = math.sqrt((self.radius * self.radius) - (half_chord * half_chord))
if angle < math.pi: # se angolo < 180 gradi
# aggiungo 90 gradi per cercare il centro a sinistra del segmento
self.center = qad_utils.getPolarPointByPtAngle(ptMiddle, angleSegment + (math.pi / 2), distFromCenter)
else:
# sottraggo 90 gradi per cercare il centro a destra del segmento
self.center = qad_utils.getPolarPointByPtAngle(ptMiddle, angleSegment - (math.pi / 2), distFromCenter)
self.startAngle = qad_utils.getAngleBy2Pts(self.center, startPt)
self.endAngle = qad_utils.getAngleBy2Pts(self.center, endPt)
return True
def fromStartEndPtsTan(self, startPt, endPt, tan):
"""
setta le caratteristiche dell'arco attraverso:
punto iniziale
punto finale
direzione della tangente sul punto iniziale
"""
if startPt == endPt:
return False
angleSegment = qad_utils.getAngleBy2Pts(startPt, endPt)
if tan == angleSegment or tan == angleSegment - math.pi:
return False
chord = qad_utils.getDistance(startPt, endPt)
half_chord = chord / 2
ptMiddle = qad_utils.getMiddlePoint(startPt, endPt)
angle = tan + (math.pi / 2)
angle = angleSegment - angle
distFromCenter = math.tan(angle) * half_chord
self.center = qad_utils.getPolarPointByPtAngle(ptMiddle, angleSegment - (math.pi / 2), distFromCenter)
pt = qad_utils.getPolarPointByPtAngle(startPt, tan, chord)
if qad_utils.leftOfLine(endPt, startPt, pt) < 0:
# arco si sviluppa a sinistra della tangente
self.startAngle = qad_utils.getAngleBy2Pts(self.center, startPt)
self.endAngle = qad_utils.getAngleBy2Pts(self.center, endPt)
else:
# arco si sviluppa a destra della tangente
self.startAngle = qad_utils.getAngleBy2Pts(self.center, endPt)
self.endAngle = qad_utils.getAngleBy2Pts(self.center, startPt)
self.radius = qad_utils.getDistance(startPt, self.center)
return True
def fromStartEndPtsRadius(self, startPt, endPt, radius):
"""
setta le caratteristiche dell'arco attraverso:
punto iniziale
punto finale
raggio
"""
if startPt == endPt or radius <= 0:
return False
chord = qad_utils.getDistance(startPt, endPt)
half_chord = chord / 2
if radius < half_chord:
return False
self.radius = radius
angleSegment = qad_utils.getAngleBy2Pts(startPt, endPt)
ptMiddle = qad_utils.getMiddlePoint(startPt, endPt)
# Pitagora
distFromCenter = math.sqrt((self.radius * self.radius) -
(half_chord * half_chord))
# aggiungo 90 gradi
self.center = qad_utils.getPolarPointByPtAngle(
ptMiddle, angleSegment + (math.pi / 2), distFromCenter)
self.startAngle = qad_utils.getAngleBy2Pts(self.center, startPt)
self.endAngle = qad_utils.getAngleBy2Pts(self.center, endPt)
return True
def fromStartEndPtsAngle(self, startPt, endPt, angle):
"""
setta le caratteristiche dell'arco attraverso:
punto iniziale
punto finale
angolo inscritto
"""
if startPt == endPt or angle == 0:
return False
chord = qad_utils.getDistance(startPt, endPt)
half_chord = chord / 2
# Teorema della corda
self.radius = half_chord / math.sin(angle / 2)
angleSegment = qad_utils.getAngleBy2Pts(startPt, endPt)
ptMiddle = qad_utils.getMiddlePoint(startPt, endPt)
# Pitagora
distFromCenter = math.sqrt((self.radius * self.radius) -
(half_chord * half_chord))
if angle < math.pi: # se angolo < 180 gradi
# aggiungo 90 gradi per cercare il centro a sinistra del segmento
self.center = qad_utils.getPolarPointByPtAngle(
ptMiddle, angleSegment + (math.pi / 2), distFromCenter)
else:
# sottraggo 90 gradi per cercare il centro a destra del segmento
self.center = qad_utils.getPolarPointByPtAngle(
ptMiddle, angleSegment - (math.pi / 2), distFromCenter)
self.startAngle = qad_utils.getAngleBy2Pts(self.center, startPt)
self.endAngle = qad_utils.getAngleBy2Pts(self.center, endPt)
return True
def fromStartEndPtsTan(self, startPt, endPt, tan):
"""
setta le caratteristiche dell'arco attraverso:
punto iniziale
punto finale
direzione della tangente sul punto iniziale
"""
if startPt == endPt:
return False
angleSegment = qad_utils.getAngleBy2Pts(startPt, endPt)
if tan == angleSegment or tan == angleSegment - math.pi:
return False
chord = qad_utils.getDistance(startPt, endPt)
half_chord = chord / 2
ptMiddle = qad_utils.getMiddlePoint(startPt, endPt)
angle = tan + (math.pi / 2)
angle = angleSegment - angle
distFromCenter = math.tan(angle) * half_chord
self.center = qad_utils.getPolarPointByPtAngle(ptMiddle,
angleSegment - (math.pi / 2),
distFromCenter)
pt = qad_utils.getPolarPointByPtAngle(startPt, tan, chord)
if qad_utils.leftOfLine(endPt, startPt, pt) < 0:
# arco si sviluppa a sinistra della tangente
self.startAngle = qad_utils.getAngleBy2Pts(self.center, startPt)
self.endAngle = qad_utils.getAngleBy2Pts(self.center, endPt)
else:
# arco si sviluppa a destra della tangente
self.startAngle = qad_utils.getAngleBy2Pts(self.center, endPt)
self.endAngle = qad_utils.getAngleBy2Pts(self.center, startPt)
self.radius = qad_utils.getDistance(startPt, self.center)
return True
def stretchQgsLineStringGeometry(geom, containerGeom, offSetX, offSetY, tolerance2ApproxCurve):
"""
Stira i punti di una linestring che sono contenuti in containerGeom
point = punto da tirare
containerGeom = può essere una QgsGeometry rappresentante un poligono contenente i punti di geom da stirare
oppure una lista dei punti da stirare
offSetX = spostamento X
offSetY = spostamento Y
"""
obj = qad_utils.whatGeomIs(0, geom)
if (type(obj) != list and type(obj) != tuple):
objType = obj.whatIs()
if objType == "CIRCLE": # se é cerchio
if isPtContainedForStretch(obj.center, containerGeom): # se il punto è contenuto in containerGeom
obj.center.setX(obj.center.x() + offSetX)
obj.center.setY(obj.center.y() + offSetY)
return QgsGeometry.fromPolyline(obj.asPolyline(tolerance2ApproxCurve))
stretchedGeom = QgsGeometry(geom)
snapper = QadSnapper()
points = snapper.getEndPoints(stretchedGeom)
del snapper
linearObjectListToStretch = qad_utils.QadLinearObjectList()
linearObjectListToStretch.fromPolyline(geom.asPolyline())
for point in points:
if isPtContainedForStretch(point, containerGeom): # se il punto è contenuto in containerGeom
atPart = linearObjectListToStretch.containsPt(point)
while atPart >= 0:
linearObject = linearObjectListToStretch.getLinearObjectAt(atPart)
pt = linearObject.getStartPt()
if qad_utils.ptNear(pt, point): # cambio punto iniziale
pt.setX(pt.x() + offSetX)
pt.setY(pt.y() + offSetY)
if linearObject.isSegment():
linearObject.setStartPt(pt)
else:
oldArc = linearObject.getArc()
middlePt = oldArc.getMiddlePt()
distFromMiddleChord = qad_utils.getDistance(middlePt, qad_utils.getPerpendicularPointOnInfinityLine(oldArc.getStartPt(), oldArc.getEndPt(), middlePt))
newArc = QadArc()
if linearObject.isInverseArc():
middlePt = qad_utils.getMiddlePoint(pt, oldArc.getStartPt())
middlePt = qad_utils.getPolarPointByPtAngle(middlePt, \
qad_utils.getAngleBy2Pts(pt, oldArc.getStartPt()) + math.pi / 2, \
distFromMiddleChord)
if newArc.fromStartSecondEndPts(oldArc.getStartPt(), middlePt, pt) == False:
return None
else:
middlePt = qad_utils.getMiddlePoint(pt, oldArc.getEndPt())
middlePt = qad_utils.getPolarPointByPtAngle(middlePt, \
qad_utils.getAngleBy2Pts(pt, oldArc.getEndPt()) - math.pi / 2, \
distFromMiddleChord)
if newArc.fromStartSecondEndPts(pt, middlePt, oldArc.getEndPt()) == False:
return None
linearObject.setArc(newArc, linearObject.isInverseArc())
else:
pt = linearObject.getEndPt()
if qad_utils.ptNear(pt, point): # cambio punto finale
pt.setX(pt.x() + offSetX)
pt.setY(pt.y() + offSetY)
if linearObject.isSegment():
linearObject.setEndPt(pt)
else:
oldArc = linearObject.getArc()
middlePt = oldArc.getMiddlePt()
distFromMiddleChord = qad_utils.getDistance(middlePt, qad_utils.getPerpendicularPointOnInfinityLine(oldArc.getStartPt(), oldArc.getEndPt(), middlePt))
newArc = QadArc()
if linearObject.isInverseArc():
middlePt = qad_utils.getMiddlePoint(pt, oldArc.getEndPt())
middlePt = qad_utils.getPolarPointByPtAngle(middlePt, \
qad_utils.getAngleBy2Pts(pt, oldArc.getEndPt()) - math.pi / 2, \
distFromMiddleChord)
if newArc.fromStartSecondEndPts(pt, middlePt, oldArc.getEndPt()) == False:
return None
else:
middlePt = qad_utils.getMiddlePoint(pt, oldArc.getStartPt())
middlePt = qad_utils.getPolarPointByPtAngle(middlePt, \
qad_utils.getAngleBy2Pts(pt, oldArc.getStartPt()) + math.pi / 2, \
distFromMiddleChord)
if newArc.fromStartSecondEndPts(oldArc.getStartPt(), middlePt, pt) == False:
return None
linearObject.setArc(newArc, linearObject.isInverseArc())
atPart = linearObjectListToStretch.containsPt(point, atPart + 1)
pts = linearObjectListToStretch.asPolyline(tolerance2ApproxCurve)
stretchedGeom = QgsGeometry.fromPolyline(pts)
return stretchedGeom
def stretchQgsLineStringGeometry(geom, containerGeom, offSetX, offSetY, tolerance2ApproxCurve = None):
"""
Stira i punti di una linestring che sono contenuti in containerGeom
point = punto da tirare
containerGeom = può essere una QgsGeometry rappresentante un poligono contenente i punti di geom da stirare
oppure una lista dei punti da stirare
offSetX = spostamento X
offSetY = spostamento Y
"""
if tolerance2ApproxCurve == None:
tolerance = QadVariables.get(QadMsg.translate("Environment variables", "TOLERANCE2APPROXCURVE"))
else:
tolerance = tolerance2ApproxCurve
obj = qad_utils.whatGeomIs(0, geom)
if (type(obj) != list and type(obj) != tuple):
objType = obj.whatIs()
if objType == "CIRCLE": # se é cerchio
if isPtContainedForStretch(obj.center, containerGeom): # se il punto è contenuto in containerGeom
obj.center.setX(obj.center.x() + offSetX)
obj.center.setY(obj.center.y() + offSetY)
return QgsGeometry.fromPolyline(obj.asPolyline(tolerance))
stretchedGeom = QgsGeometry(geom)
snapper = QadSnapper()
points = snapper.getEndPoints(stretchedGeom)
del snapper
linearObjectListToStretch = qad_utils.QadLinearObjectList()
linearObjectListToStretch.fromPolyline(geom.asPolyline())
for point in points:
if isPtContainedForStretch(point, containerGeom): # se il punto è contenuto in containerGeom
atPart = linearObjectListToStretch.containsPt(point)
while atPart >= 0:
linearObject = linearObjectListToStretch.getLinearObjectAt(atPart)
pt = linearObject.getStartPt()
if qad_utils.ptNear(pt, point): # cambio punto iniziale
pt.setX(pt.x() + offSetX)
pt.setY(pt.y() + offSetY)
if linearObject.isSegment():
linearObject.setStartPt(pt)
else:
oldArc = linearObject.getArc()
middlePt = oldArc.getMiddlePt()
distFromMiddleChord = qad_utils.getDistance(middlePt, qad_utils.getPerpendicularPointOnInfinityLine(oldArc.getStartPt(), oldArc.getEndPt(), middlePt))
newArc = QadArc()
if linearObject.isInverseArc():
middlePt = qad_utils.getMiddlePoint(pt, oldArc.getStartPt())
middlePt = qad_utils.getPolarPointByPtAngle(middlePt, \
qad_utils.getAngleBy2Pts(pt, oldArc.getStartPt()) + math.pi / 2, \
distFromMiddleChord)
if newArc.fromStartSecondEndPts(oldArc.getStartPt(), middlePt, pt) == False:
return None
else:
middlePt = qad_utils.getMiddlePoint(pt, oldArc.getEndPt())
middlePt = qad_utils.getPolarPointByPtAngle(middlePt, \
qad_utils.getAngleBy2Pts(pt, oldArc.getEndPt()) - math.pi / 2, \
distFromMiddleChord)
if newArc.fromStartSecondEndPts(pt, middlePt, oldArc.getEndPt()) == False:
return None
linearObject.setArc(newArc, linearObject.isInverseArc())
else:
pt = linearObject.getEndPt()
if qad_utils.ptNear(pt, point): # cambio punto finale
pt.setX(pt.x() + offSetX)
pt.setY(pt.y() + offSetY)
if linearObject.isSegment():
linearObject.setEndPt(pt)
else:
oldArc = linearObject.getArc()
middlePt = oldArc.getMiddlePt()
distFromMiddleChord = qad_utils.getDistance(middlePt, qad_utils.getPerpendicularPointOnInfinityLine(oldArc.getStartPt(), oldArc.getEndPt(), middlePt))
newArc = QadArc()
if linearObject.isInverseArc():
middlePt = qad_utils.getMiddlePoint(pt, oldArc.getEndPt())
middlePt = qad_utils.getPolarPointByPtAngle(middlePt, \
qad_utils.getAngleBy2Pts(pt, oldArc.getEndPt()) - math.pi / 2, \
distFromMiddleChord)
if newArc.fromStartSecondEndPts(pt, middlePt, oldArc.getEndPt()) == False:
return None
else:
middlePt = qad_utils.getMiddlePoint(pt, oldArc.getStartPt())
middlePt = qad_utils.getPolarPointByPtAngle(middlePt, \
qad_utils.getAngleBy2Pts(pt, oldArc.getStartPt()) + math.pi / 2, \
distFromMiddleChord)
if newArc.fromStartSecondEndPts(oldArc.getStartPt(), middlePt, pt) == False:
return None
linearObject.setArc(newArc, linearObject.isInverseArc())
atPart = linearObjectListToStretch.containsPt(point, atPart + 1)
pts = linearObjectListToStretch.asPolyline(tolerance)
stretchedGeom = QgsGeometry.fromPolyline(pts)
return stretchedGeom
