Merge ssh://free-cad.git.sourceforge.net/gitroot/free-cad/free-cad
This commit is contained in:
unknown
commit
c045ba84d9
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@ -38,7 +38,17 @@ class Snapper:
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and arch module to manage object snapping. It is responsible for
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finding snap points and displaying snap markers. Usually You
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only need to invoke it's snap() function, all the rest is taken
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care of."""
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care of.
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3 functions are useful for the scriptwriter: snap(), constrain()
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or getPoint() which is an all-in-one combo.
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The indivudual snapToXXX() functions return a snap definition in
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the form [real_point,marker_type,visual_point], and are not
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meant to be used directly, they are all called when necessary by
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the general snap() function.
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"""
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def __init__(self):
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self.lastObj = [None,None]
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@ -57,6 +67,7 @@ class Snapper:
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self.extLine = None
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self.grid = None
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self.constrainLine = None
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self.trackLine = None
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# the snapmarker has "dot","circle" and "square" available styles
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self.mk = {'passive':'circle',
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@ -98,6 +109,8 @@ class Snapper:
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self.unconstrain()
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return point
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snaps = []
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# type conversion if needed
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if isinstance(screenpos,list):
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screenpos = tuple(screenpos)
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@ -141,7 +154,7 @@ class Snapper:
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info = FreeCADGui.ActiveDocument.ActiveView.getObjectInfo((screenpos[0],screenpos[1]))
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# checking if parallel to one of the edges of the last objects
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point = self.snapToExtensions(point,lastpoint)
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point = self.snapToExtensions(point,lastpoint,constrain)
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if not info:
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@ -152,7 +165,6 @@ class Snapper:
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else:
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# we have an object to snap to
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snaps = []
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obj = FreeCAD.ActiveDocument.getObject(info['Object'])
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if not obj:
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@ -213,6 +225,9 @@ class Snapper:
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self.lastObj[0] = self.lastObj[1]
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self.lastObj[1] = obj.Name
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if not snaps:
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return point
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# calculating the nearest snap point
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shortest = 1000000000000000000
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origin = Vector(info['x'],info['y'],info['z'])
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@ -241,8 +256,22 @@ class Snapper:
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# return the final point
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return cstr(winner[2])
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def snapToExtensions(self,point,last):
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def snapToExtensions(self,point,last,constrain):
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"returns a point snapped to extension or parallel line to last object, if any"
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tsnap = self.snapToExtOrtho(last,constrain)
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if tsnap:
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if (tsnap[0].sub(point)).Length < self.radius:
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if self.tracker:
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self.tracker.setCoords(tsnap[2])
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self.tracker.setMarker(self.mk[tsnap[1]])
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self.tracker.on()
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if self.extLine:
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self.extLine.p2(tsnap[2])
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self.extLine.on()
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self.setCursor(tsnap[1])
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return tsnap[2]
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for o in [self.lastObj[1],self.lastObj[0]]:
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if o:
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ob = FreeCAD.ActiveDocument.getObject(o)
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@ -333,24 +362,30 @@ class Snapper:
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def snapToOrtho(self,shape,last,constrain):
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"returns a list of ortho snap locations"
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snaps = []
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if constrain != None:
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if constrain:
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if isinstance(shape,Part.Edge):
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if last:
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if isinstance(shape.Curve,Part.Line):
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p1 = shape.Vertexes[0].Point
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p2 = shape.Vertexes[-1].Point
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if (constrain == 0):
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if ((last.y > p1.y) and (last.y < p2.y) or (last.y > p2.y) and (last.y < p1.y)):
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pc = (last.y-p1.y)/(p2.y-p1.y)
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cp = (Vector(p1.x+pc*(p2.x-p1.x),p1.y+pc*(p2.y-p1.y),p1.z+pc*(p2.z-p1.z)))
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snaps.append([cp,'ortho',cp])
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elif (constrain == 1):
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if ((last.x > p1.x) and (last.x < p2.x) or (last.x > p2.x) and (last.x < p1.x)):
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pc = (last.x-p1.x)/(p2.x-p1.x)
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cp = (Vector(p1.x+pc*(p2.x-p1.x),p1.y+pc*(p2.y-p1.y),p1.z+pc*(p2.z-p1.z)))
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snaps.append([cp,'ortho',cp])
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if self.constraintAxis:
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tmpEdge = Part.Line(last,last.add(self.constraintAxis)).toShape()
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# get the intersection points
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pt = fcgeo.findIntersection(tmpEdge,shape,True,True)
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if pt:
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for p in pt:
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snaps.append([p,'ortho',p])
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return snaps
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def snapToExtOrtho(self,last,constrain):
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"returns an ortho X extension snap location"
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if constrain and last and self.constraintAxis and self.extLine:
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tmpEdge1 = Part.Line(last,last.add(self.constraintAxis)).toShape()
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tmpEdge2 = Part.Line(self.extLine.p1(),self.extLine.p2()).toShape()
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# get the intersection points
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pt = fcgeo.findIntersection(tmpEdge1,tmpEdge2,True,True)
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if pt:
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return [pt[0],'ortho',pt[0]]
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return None
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def snapToAngles(self,shape):
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"returns a list of angle snap locations"
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snaps = []
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@ -511,316 +546,54 @@ class Snapper:
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self.affinity = None
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if self.constrainLine:
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self.constrainLine.off()
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# deprecated ##################################################################
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# last snapped objects, for quick intersection calculation
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lastObj = [0,0]
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def getPoint(self,last=None,callback=None):
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"""getPoint([last],[callback]) : gets a 3D point from the screen. You can provide an existing point,
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in that case additional snap options and a tracker are available. You can also passa function as
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callback, which will get called with the resulting point as argument, when a point is clicked:
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def cb(point):
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print "got a 3D point: ",point
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FreeCADGui.Snapper.getPoint(callback=cb)
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"""
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self.pt = None
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self.ui = FreeCADGui.draftToolBar
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self.view = FreeCADGui.ActiveDocument.ActiveView
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# setting a track line if we got an existing point
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if last:
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if not self.trackLine:
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self.trackLine = DraftTrackers.lineTracker()
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self.trackLine.p1(last)
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self.trackLine.on()
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def move(event_cb):
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event = event_cb.getEvent()
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mousepos = event.getPosition()
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ctrl = event.wasCtrlDown()
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shift = event.wasShiftDown()
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self.pt = FreeCADGui.Snapper.snap(mousepos,lastpoint=last,active=ctrl,constrain=shift)
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self.ui.displayPoint(self.pt,last,plane=FreeCAD.DraftWorkingPlane,mask=FreeCADGui.Snapper.affinity)
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if self.trackLine:
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self.trackLine.p2(self.pt)
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def snapPoint(target,point,cursor,ctrl=False):
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'''
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Snap function used by the Draft tools
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Currently has two modes: passive and active. Pressing CTRL while
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clicking puts you in active mode:
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- In passive mode (an open circle appears), your point is
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snapped to the nearest point on any underlying geometry.
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- In active mode (ctrl pressed, a filled circle appears), your point
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can currently be snapped to the following points:
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- Nodes and midpoints of all Part shapes
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- Nodes and midpoints of lines/wires
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- Centers and quadrant points of circles
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- Endpoints of arcs
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- Intersection between line, wires segments, arcs and circles
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- When constrained (SHIFT pressed), Intersections between
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constraining axis and lines/wires
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'''
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def getConstrainedPoint(edge,last,constrain):
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"check for constrained snappoint"
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p1 = edge.Vertexes[0].Point
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p2 = edge.Vertexes[-1].Point
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ar = []
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if (constrain == 0):
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if ((last.y > p1.y) and (last.y < p2.y) or (last.y > p2.y) and (last.y < p1.y)):
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pc = (last.y-p1.y)/(p2.y-p1.y)
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cp = (Vector(p1.x+pc*(p2.x-p1.x),p1.y+pc*(p2.y-p1.y),p1.z+pc*(p2.z-p1.z)))
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ar.append([cp,1,cp]) # constrainpoint
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if (constrain == 1):
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if ((last.x > p1.x) and (last.x < p2.x) or (last.x > p2.x) and (last.x < p1.x)):
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pc = (last.x-p1.x)/(p2.x-p1.x)
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cp = (Vector(p1.x+pc*(p2.x-p1.x),p1.y+pc*(p2.y-p1.y),p1.z+pc*(p2.z-p1.z)))
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ar.append([cp,1,cp]) # constrainpoint
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return ar
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def getPassivePoint(info):
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"returns a passive snap point"
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cur = Vector(info['x'],info['y'],info['z'])
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return [cur,2,cur]
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def getScreenDist(dist,cursor):
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"returns a 3D distance from a screen pixels distance"
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p1 = FreeCADGui.ActiveDocument.ActiveView.getPoint(cursor)
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p2 = FreeCADGui.ActiveDocument.ActiveView.getPoint((cursor[0]+dist,cursor[1]))
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return (p2.sub(p1)).Length
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def getGridSnap(target,point):
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"returns a grid snap point if available"
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if target.grid:
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return target.grid.getClosestNode(point)
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return None
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def getPerpendicular(edge,last):
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"returns a point on an edge, perpendicular to the given point"
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dv = last.sub(edge.Vertexes[0].Point)
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nv = fcvec.project(dv,fcgeo.vec(edge))
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np = (edge.Vertexes[0].Point).add(nv)
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return np
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# checking if alwaySnap setting is on
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extractrl = False
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if Draft.getParam("alwaysSnap"):
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extractrl = ctrl
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ctrl = True
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# setting Radius
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radius = getScreenDist(Draft.getParam("snapRange"),cursor)
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# checking if parallel to one of the edges of the last objects
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target.snap.off()
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target.extsnap.off()
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if (len(target.node) > 0):
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for o in [lastObj[1],lastObj[0]]:
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if o:
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ob = target.doc.getObject(o)
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if ob:
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if ob.isDerivedFrom("Part::Feature"):
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edges = ob.Shape.Edges
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if len(edges)<10:
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for e in edges:
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if isinstance(e.Curve,Part.Line):
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last = target.node[len(target.node)-1]
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de = Part.Line(last,last.add(fcgeo.vec(e))).toShape()
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np = getPerpendicular(e,point)
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if (np.sub(point)).Length < radius:
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target.snap.coords.point.setValue((np.x,np.y,np.z))
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target.snap.setMarker("circle")
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target.snap.on()
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target.extsnap.p1(e.Vertexes[0].Point)
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target.extsnap.p2(np)
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target.extsnap.on()
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point = np
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else:
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last = target.node[len(target.node)-1]
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de = Part.Line(last,last.add(fcgeo.vec(e))).toShape()
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np = getPerpendicular(de,point)
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if (np.sub(point)).Length < radius:
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target.snap.coords.point.setValue((np.x,np.y,np.z))
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target.snap.setMarker("circle")
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target.snap.on()
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point = np
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# check if we snapped to something
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snapped=target.view.getObjectInfo((cursor[0],cursor[1]))
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if (snapped == None):
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# nothing has been snapped, check fro grid snap
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gpt = getGridSnap(target,point)
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if gpt:
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if radius != 0:
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dv = point.sub(gpt)
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if dv.Length <= radius:
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target.snap.coords.point.setValue((gpt.x,gpt.y,gpt.z))
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target.snap.setMarker("point")
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target.snap.on()
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return gpt
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return point
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else:
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# we have something to snap
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obj = target.doc.getObject(snapped['Object'])
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if hasattr(obj.ViewObject,"Selectable"):
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if not obj.ViewObject.Selectable:
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return point
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if not ctrl:
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# are we in passive snap?
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snapArray = [getPassivePoint(snapped)]
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else:
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snapArray = []
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comp = snapped['Component']
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if obj.isDerivedFrom("Part::Feature"):
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if "Edge" in comp:
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# get the stored objects to calculate intersections
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intedges = []
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if lastObj[0]:
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lo = target.doc.getObject(lastObj[0])
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if lo:
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if lo.isDerivedFrom("Part::Feature"):
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intedges = lo.Shape.Edges
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nr = int(comp[4:])-1
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edge = obj.Shape.Edges[nr]
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for v in edge.Vertexes:
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snapArray.append([v.Point,0,v.Point])
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if isinstance(edge.Curve,Part.Line):
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# the edge is a line
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midpoint = fcgeo.findMidpoint(edge)
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snapArray.append([midpoint,1,midpoint])
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if (len(target.node) > 0):
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last = target.node[len(target.node)-1]
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snapArray.extend(getConstrainedPoint(edge,last,target.constrain))
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np = getPerpendicular(edge,last)
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snapArray.append([np,1,np])
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elif isinstance (edge.Curve,Part.Circle):
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# the edge is an arc
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rad = edge.Curve.Radius
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pos = edge.Curve.Center
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for i in [0,30,45,60,90,120,135,150,180,210,225,240,270,300,315,330]:
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ang = math.radians(i)
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cur = Vector(math.sin(ang)*rad+pos.x,math.cos(ang)*rad+pos.y,pos.z)
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snapArray.append([cur,1,cur])
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for i in [15,37.5,52.5,75,105,127.5,142.5,165,195,217.5,232.5,255,285,307.5,322.5,345]:
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ang = math.radians(i)
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cur = Vector(math.sin(ang)*rad+pos.x,math.cos(ang)*rad+pos.y,pos.z)
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snapArray.append([cur,0,pos])
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for e in intedges:
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# get the intersection points
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pt = fcgeo.findIntersection(e,edge)
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if pt:
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for p in pt:
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snapArray.append([p,3,p])
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elif "Vertex" in comp:
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# directly snapped to a vertex
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p = Vector(snapped['x'],snapped['y'],snapped['z'])
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snapArray.append([p,0,p])
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elif comp == '':
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# workaround for the new view provider
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p = Vector(snapped['x'],snapped['y'],snapped['z'])
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snapArray.append([p,2,p])
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else:
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snapArray = [getPassivePoint(snapped)]
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elif Draft.getType(obj) == "Dimension":
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for pt in [obj.Start,obj.End,obj.Dimline]:
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snapArray.append([pt,0,pt])
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elif Draft.getType(obj) == "Mesh":
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for v in obj.Mesh.Points:
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snapArray.append([v.Vector,0,v.Vector])
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if not lastObj[0]:
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lastObj[0] = obj.Name
|
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lastObj[1] = obj.Name
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if (lastObj[1] != obj.Name):
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lastObj[0] = lastObj[1]
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lastObj[1] = obj.Name
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# calculating shortest distance
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shortest = 1000000000000000000
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spt = Vector(snapped['x'],snapped['y'],snapped['z'])
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newpoint = [Vector(0,0,0),0,Vector(0,0,0)]
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for pt in snapArray:
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if pt[0] == None: print "snapPoint: debug 'i[0]' is 'None'"
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di = pt[0].sub(spt)
|
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if di.Length < shortest:
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shortest = di.Length
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newpoint = pt
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if radius != 0:
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dv = point.sub(newpoint[2])
|
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if (not extractrl) and (dv.Length > radius):
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newpoint = getPassivePoint(snapped)
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target.snap.coords.point.setValue((newpoint[2].x,newpoint[2].y,newpoint[2].z))
|
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if (newpoint[1] == 1):
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target.snap.setMarker("square")
|
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elif (newpoint[1] == 0):
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target.snap.setMarker("point")
|
||||
elif (newpoint[1] == 3):
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target.snap.setMarker("square")
|
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else:
|
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target.snap.setMarker("circle")
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target.snap.on()
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||||
return newpoint[2]
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def constrainPoint (target,pt,mobile=False,sym=False):
|
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'''
|
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Constrain function used by the Draft tools
|
||||
On commands that need to enter several points (currently only line/wire),
|
||||
you can constrain the next point to be picked to the last drawn point by
|
||||
pressing SHIFT. The vertical or horizontal constraining depends on the
|
||||
position of your mouse in relation to last point at the moment you press
|
||||
SHIFT. if mobile=True, mobile behaviour applies. If sym=True, x alway = y
|
||||
'''
|
||||
point = Vector(pt)
|
||||
if len(target.node) > 0:
|
||||
last = target.node[-1]
|
||||
dvec = point.sub(last)
|
||||
affinity = FreeCAD.DraftWorkingPlane.getClosestAxis(dvec)
|
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if ((target.constrain == None) or mobile):
|
||||
if affinity == "x":
|
||||
dv = fcvec.project(dvec,FreeCAD.DraftWorkingPlane.u)
|
||||
point = last.add(dv)
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if sym:
|
||||
l = dv.Length
|
||||
if dv.getAngle(FreeCAD.DraftWorkingPlane.u) > 1:
|
||||
l = -l
|
||||
point = last.add(FreeCAD.DraftWorkingPlane.getGlobalCoords(Vector(l,l,l)))
|
||||
target.constrain = 0 #x direction
|
||||
target.ui.xValue.setEnabled(True)
|
||||
target.ui.yValue.setEnabled(False)
|
||||
target.ui.zValue.setEnabled(False)
|
||||
target.ui.xValue.setFocus()
|
||||
elif affinity == "y":
|
||||
dv = fcvec.project(dvec,FreeCAD.DraftWorkingPlane.v)
|
||||
point = last.add(dv)
|
||||
if sym:
|
||||
l = dv.Length
|
||||
if dv.getAngle(FreeCAD.DraftWorkingPlane.v) > 1:
|
||||
l = -l
|
||||
point = last.add(FreeCAD.DraftWorkingPlane.getGlobalCoords(Vector(l,l,l)))
|
||||
target.constrain = 1 #y direction
|
||||
target.ui.xValue.setEnabled(False)
|
||||
target.ui.yValue.setEnabled(True)
|
||||
target.ui.zValue.setEnabled(False)
|
||||
target.ui.yValue.setFocus()
|
||||
elif affinity == "z":
|
||||
dv = fcvec.project(dvec,FreeCAD.DraftWorkingPlane.axis)
|
||||
point = last.add(dv)
|
||||
if sym:
|
||||
l = dv.Length
|
||||
if dv.getAngle(FreeCAD.DraftWorkingPlane.axis) > 1:
|
||||
l = -l
|
||||
point = last.add(FreeCAD.DraftWorkingPlane.getGlobalCoords(Vector(l,l,l)))
|
||||
target.constrain = 2 #z direction
|
||||
target.ui.xValue.setEnabled(False)
|
||||
target.ui.yValue.setEnabled(False)
|
||||
target.ui.zValue.setEnabled(True)
|
||||
target.ui.zValue.setFocus()
|
||||
else: target.constrain = 3
|
||||
elif (target.constrain == 0):
|
||||
dv = fcvec.project(dvec,FreeCAD.DraftWorkingPlane.u)
|
||||
point = last.add(dv)
|
||||
if sym:
|
||||
l = dv.Length
|
||||
if dv.getAngle(FreeCAD.DraftWorkingPlane.u) > 1:
|
||||
l = -l
|
||||
point = last.add(FreeCAD.DraftWorkingPlane.getGlobalCoords(Vector(l,l,l)))
|
||||
elif (target.constrain == 1):
|
||||
dv = fcvec.project(dvec,FreeCAD.DraftWorkingPlane.v)
|
||||
point = last.add(dv)
|
||||
if sym:
|
||||
l = dv.Length
|
||||
if dv.getAngle(FreeCAD.DraftWorkingPlane.u) > 1:
|
||||
l = -l
|
||||
point = last.add(FreeCAD.DraftWorkingPlane.getGlobalCoords(Vector(l,l,l)))
|
||||
elif (target.constrain == 2):
|
||||
dv = fcvec.project(dvec,FreeCAD.DraftWorkingPlane.axis)
|
||||
point = last.add(dv)
|
||||
if sym:
|
||||
l = dv.Length
|
||||
if dv.getAngle(FreeCAD.DraftWorkingPlane.u) > 1:
|
||||
l = -l
|
||||
point = last.add(FreeCAD.DraftWorkingPlane.getGlobalCoords(Vector(l,l,l)))
|
||||
return point
|
||||
def click(event_cb):
|
||||
event = event_cb.getEvent()
|
||||
if event.getState() == coin.SoMouseButtonEvent.DOWN:
|
||||
self.view.removeEventCallbackPivy(coin.SoMouseButtonEvent.getClassTypeId(),self.callbackClick)
|
||||
self.view.removeEventCallbackPivy(coin.SoLocation2Event.getClassTypeId(),self.callbackMove)
|
||||
FreeCADGui.Snapper.off()
|
||||
self.ui.offUi()
|
||||
if self.trackLine:
|
||||
self.trackLine.off()
|
||||
if callback:
|
||||
callback(self.pt)
|
||||
self.pt = None
|
||||
|
||||
# adding 2 callback functions
|
||||
self.ui.pointUi()
|
||||
self.callbackClick = self.view.addEventCallbackPivy(coin.SoMouseButtonEvent.getClassTypeId(),click)
|
||||
self.callbackMove = self.view.addEventCallbackPivy(coin.SoLocation2Event.getClassTypeId(),move)
|
||||
|
||||
if not hasattr(FreeCADGui,"Snapper"):
|
||||
FreeCADGui.Snapper = Snapper()
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user