Draft: small fixes
This commit is contained in:
Yorik van Havre
parent
14562ba540
commit
4e9412c0ae
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@ -21,7 +21,7 @@
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#* *
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#***************************************************************************
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import FreeCAD,FreeCADGui,Draft,math,DraftVecUtils
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import FreeCAD,FreeCADGui,Draft,math,DraftVecUtils,ArchCommands
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from FreeCAD import Vector
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from PyQt4 import QtCore, QtGui
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from pivy import coin
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@ -333,10 +333,15 @@ class SelectPlane(DraftTool):
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sel = FreeCADGui.Selection.getSelectionEx()
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if len(sel) == 1:
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sel = sel[0]
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if sel.HasSubObjects:
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self.ui = FreeCADGui.draftToolBar
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if Draft.getType(sel.Object) == "Axis":
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plane.alignToEdges(sel.Object.Shape.Edges)
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self.display(plane.axis)
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self.finish()
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return
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elif sel.HasSubObjects:
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if len(sel.SubElementNames) == 1:
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if "Face" in sel.SubElementNames[0]:
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self.ui = FreeCADGui.draftToolBar
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plane.alignToFace(sel.SubObjects[0], self.offset)
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self.display(plane.axis)
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self.finish()
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@ -34,267 +34,284 @@ This module provides a class called plane to assist in selecting and maintaining
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'''
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class plane:
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'''A WorkPlane object'''
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'''A WorkPlane object'''
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def __init__(self):
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# keep track of active document. Reset view when doc changes.
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self.doc = None
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# self.weak is true if the plane has been defined by self.setup or has been reset
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self.weak = True
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# u, v axes and position define plane, perpendicular axis is handy, though redundant.
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self.u = Vector(1,0,0)
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self.v = Vector(0,1,0)
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self.axis = Vector(0,0,1)
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self.position = Vector(0,0,0)
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# a placeholder for a stored state
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self.stored = None
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def __init__(self):
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# keep track of active document. Reset view when doc changes.
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self.doc = None
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# self.weak is true if the plane has been defined by self.setup or has been reset
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self.weak = True
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# u, v axes and position define plane, perpendicular axis is handy, though redundant.
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self.u = Vector(1,0,0)
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self.v = Vector(0,1,0)
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self.axis = Vector(0,0,1)
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self.position = Vector(0,0,0)
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# a placeholder for a stored state
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self.stored = None
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def __repr__(self):
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return "Workplane x="+str(DraftVecUtils.rounded(self.u))+" y="+str(DraftVecUtils.rounded(self.v))+" z="+str(DraftVecUtils.rounded(self.axis))
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def __repr__(self):
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return "Workplane x="+str(DraftVecUtils.rounded(self.u))+" y="+str(DraftVecUtils.rounded(self.v))+" z="+str(DraftVecUtils.rounded(self.axis))
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def offsetToPoint(self, p, direction=None):
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'''
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Return the signed distance from p to the plane, such
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that p + offsetToPoint(p)*direction lies on the plane.
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direction defaults to -plane.axis
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'''
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def offsetToPoint(self, p, direction=None):
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'''
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Return the signed distance from p to the plane, such
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that p + offsetToPoint(p)*direction lies on the plane.
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direction defaults to -plane.axis
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'''
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'''
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A picture will help explain the computation:
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'''
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A picture will help explain the computation:
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p
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//|
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/ / |
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/ / |
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/ / |
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/ / |
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-------------------- plane -----c-----x-----a--------
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/ / |
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/ / |
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/ / |
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-------------------- plane -----c-----x-----a--------
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Here p is the specified point,
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c is a point (in this case plane.position) on the plane
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x is the intercept on the plane from p in the specified direction, and
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a is the perpendicular intercept on the plane (i.e. along plane.axis)
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Using vertival bars to denote the length operator,
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Using vertival bars to denote the length operator,
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|ap| = |cp| * cos(apc) = |xp| * cos(apx)
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so
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|xp| = |cp| * cos(apc) / cos(apx)
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= (cp . axis) / (direction . axis)
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'''
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if direction == None: direction = self.axis
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return direction.dot(self.position.sub(p))
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'''
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if direction == None: direction = self.axis
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return direction.dot(self.position.sub(p))
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def projectPoint(self, p, direction=None):
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'''project point onto plane, default direction is orthogonal'''
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if not direction:
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direction = self.axis
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lp = self.getLocalCoords(p)
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gp = self.getGlobalCoords(Vector(lp.x,lp.y,0))
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a = direction.getAngle(gp.sub(p))
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if a > math.pi/2:
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direction = DraftVecUtils.neg(direction)
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a = math.pi - a
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ld = self.getLocalRot(direction)
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gd = self.getGlobalRot(Vector(ld.x,ld.y,0))
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hyp = abs(math.tan(a) * lp.z)
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return gp.add(DraftVecUtils.scaleTo(gd,hyp))
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def projectPoint(self, p, direction=None):
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'''project point onto plane, default direction is orthogonal'''
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if not direction:
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direction = self.axis
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lp = self.getLocalCoords(p)
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gp = self.getGlobalCoords(Vector(lp.x,lp.y,0))
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a = direction.getAngle(gp.sub(p))
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if a > math.pi/2:
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direction = DraftVecUtils.neg(direction)
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a = math.pi - a
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ld = self.getLocalRot(direction)
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gd = self.getGlobalRot(Vector(ld.x,ld.y,0))
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hyp = abs(math.tan(a) * lp.z)
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return gp.add(DraftVecUtils.scaleTo(gd,hyp))
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def projectPointOld(self, p, direction=None):
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'''project point onto plane, default direction is orthogonal. Obsolete'''
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if not direction:
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direction = self.axis
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t = Vector(direction)
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#t.normalize()
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a = round(t.getAngle(self.axis),DraftVecUtils.precision())
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pp = round((math.pi)/2,DraftVecUtils.precision())
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if a == pp:
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return p
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t.multiply(self.offsetToPoint(p, direction))
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return p.add(t)
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def projectPointOld(self, p, direction=None):
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'''project point onto plane, default direction is orthogonal. Obsolete'''
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if not direction:
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direction = self.axis
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t = Vector(direction)
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#t.normalize()
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a = round(t.getAngle(self.axis),DraftVecUtils.precision())
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pp = round((math.pi)/2,DraftVecUtils.precision())
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if a == pp:
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return p
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t.multiply(self.offsetToPoint(p, direction))
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return p.add(t)
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def alignToPointAndAxis(self, point, axis, offset, upvec=None):
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self.doc = FreeCAD.ActiveDocument
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self.axis = axis;
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self.axis.normalize()
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if (DraftVecUtils.equals(axis, Vector(1,0,0))):
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self.u = Vector(0,1,0)
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self.v = Vector(0,0,1)
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elif (DraftVecUtils.equals(axis, Vector(-1,0,0))):
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self.u = Vector(0,-1,0)
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self.v = Vector(0,0,1)
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elif upvec:
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self.v = upvec
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self.v.normalize()
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self.u = self.v.cross(self.axis)
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else:
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self.v = axis.cross(Vector(1,0,0))
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self.v.normalize()
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self.u = DraftVecUtils.rotate(self.v, -math.pi/2, self.axis)
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offsetVector = Vector(axis); offsetVector.multiply(offset)
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self.position = point.add(offsetVector)
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self.weak = False
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# FreeCAD.Console.PrintMessage("(position = " + str(self.position) + ")\n")
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# FreeCAD.Console.PrintMessage("Current workplane: x="+str(DraftVecUtils.rounded(self.u))+" y="+str(DraftVecUtils.rounded(self.v))+" z="+str(DraftVecUtils.rounded(self.axis))+"\n")
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def alignToPointAndAxis(self, point, axis, offset, upvec=None):
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self.doc = FreeCAD.ActiveDocument
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self.axis = axis;
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self.axis.normalize()
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if (DraftVecUtils.equals(axis, Vector(1,0,0))):
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self.u = Vector(0,1,0)
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self.v = Vector(0,0,1)
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elif (DraftVecUtils.equals(axis, Vector(-1,0,0))):
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self.u = Vector(0,-1,0)
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self.v = Vector(0,0,1)
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elif upvec:
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self.v = upvec
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self.v.normalize()
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self.u = self.v.cross(self.axis)
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else:
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self.v = axis.cross(Vector(1,0,0))
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self.v.normalize()
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self.u = DraftVecUtils.rotate(self.v, -math.pi/2, self.axis)
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offsetVector = Vector(axis); offsetVector.multiply(offset)
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self.position = point.add(offsetVector)
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self.weak = False
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# FreeCAD.Console.PrintMessage("(position = " + str(self.position) + ")\n")
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# FreeCAD.Console.PrintMessage("Current workplane: x="+str(DraftVecUtils.rounded(self.u))+" y="+str(DraftVecUtils.rounded(self.v))+" z="+str(DraftVecUtils.rounded(self.axis))+"\n")
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def alignToCurve(self, shape, offset):
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if shape.ShapeType == 'Edge':
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#??? TODO: process curve here. look at shape.edges[0].Curve
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return False
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elif shape.ShapeType == 'Wire':
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#??? TODO: determine if edges define a plane
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return False
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else:
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return False
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def alignToCurve(self, shape, offset):
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if shape.ShapeType == 'Edge':
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#??? TODO: process curve here. look at shape.edges[0].Curve
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return False
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elif shape.ShapeType == 'Wire':
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#??? TODO: determine if edges define a plane
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return False
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else:
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return False
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def alignToFace(self, shape, offset=0):
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# Set face to the unique selected face, if found
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if shape.ShapeType == 'Face':
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#we should really use face.tangentAt to get u and v here, and implement alignToUVPoint
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self.alignToPointAndAxis(shape.Faces[0].CenterOfMass, shape.Faces[0].normalAt(0,0), offset)
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return True
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else:
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return False
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def alignToEdges(self,edges):
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# use a list of edges to find a plane position
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if len(edges) > 2:
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return False
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# for axes systems, we suppose the 2 first edges are parallel
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# ??? TODO: exclude other cases first
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v1 = edges[0].Vertexes[-1].Point.sub(edges[0].Vertexes[0].Point)
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v2 = edges[1].Vertexes[0].Point.sub(edges[0].Vertexes[0].Point)
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v3 = v1.cross(v2)
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v1.normalize()
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v2.normalize()
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v3.normalize()
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print v1,v2,v3
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self.u = v1
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self.v = v2
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self.axis = v3
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def alignToSelection(self, offset):
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'''If selection uniquely defines a plane, align working plane to it. Return success (bool)'''
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sex = FreeCADGui.Selection.getSelectionEx(FreeCAD.ActiveDocument.Name)
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if len(sex) == 0:
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return False
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elif len(sex) == 1:
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if not sex[0].Object.isDerivedFrom("Part::Shape"):
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return False
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return self.alignToCurve(sex[0].Object.Shape, offset) \
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or self.alignToFace(sex[0].Object.Shape, offset) \
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or (len(sex[0].SubObjects) == 1 and self.alignToFace(sex[0].SubObjects[0], offset))
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else:
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# len(sex) > 2, look for point and line, three points, etc.
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return False
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def alignToFace(self, shape, offset=0):
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# Set face to the unique selected face, if found
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if shape.ShapeType == 'Face':
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#we should really use face.tangentAt to get u and v here, and implement alignToUVPoint
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self.alignToPointAndAxis(shape.Faces[0].CenterOfMass, shape.Faces[0].normalAt(0,0), offset)
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return True
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else:
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return False
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def setup(self, direction, point, upvec=None):
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'''If working plane is undefined, define it!'''
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if self.weak:
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self.alignToPointAndAxis(point, direction, 0, upvec)
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self.weak = True
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def alignToSelection(self, offset):
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'''If selection uniquely defines a plane, align working plane to it. Return success (bool)'''
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sex = FreeCADGui.Selection.getSelectionEx(FreeCAD.ActiveDocument.Name)
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if len(sex) == 0:
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return False
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elif len(sex) == 1:
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if not sex[0].Object.isDerivedFrom("Part::Shape"):
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return False
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return self.alignToCurve(sex[0].Object.Shape, offset) \
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or self.alignToFace(sex[0].Object.Shape, offset) \
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or (len(sex[0].SubObjects) == 1 and self.alignToFace(sex[0].SubObjects[0], offset))
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else:
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# len(sex) > 2, look for point and line, three points, etc.
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return False
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def reset(self):
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self.doc = None
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self.weak = True
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def setup(self, direction, point, upvec=None):
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'''If working plane is undefined, define it!'''
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if self.weak:
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self.alignToPointAndAxis(point, direction, 0, upvec)
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self.weak = True
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def getRotation(self):
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"returns a placement describing the working plane orientation ONLY"
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m = DraftVecUtils.getPlaneRotation(self.u,self.v,self.axis)
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return FreeCAD.Placement(m)
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def reset(self):
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self.doc = None
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self.weak = True
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def getPlacement(self):
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"returns the placement of the working plane"
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m = FreeCAD.Matrix(
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self.u.x,self.v.x,self.axis.x,self.position.x,
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self.u.y,self.v.y,self.axis.y,self.position.y,
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self.u.z,self.v.z,self.axis.z,self.position.z,
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0.0,0.0,0.0,1.0)
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return FreeCAD.Placement(m)
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def getRotation(self):
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"returns a placement describing the working plane orientation ONLY"
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m = DraftVecUtils.getPlaneRotation(self.u,self.v,self.axis)
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return FreeCAD.Placement(m)
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def setFromPlacement(self,pl):
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"sets the working plane from a placement (rotaton ONLY)"
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rot = FreeCAD.Placement(pl).Rotation
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self.u = rot.multVec(FreeCAD.Vector(1,0,0))
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self.v = rot.multVec(FreeCAD.Vector(0,1,0))
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self.axis = rot.multVec(FreeCAD.Vector(0,0,1))
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def getPlacement(self):
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"returns the placement of the working plane"
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m = FreeCAD.Matrix(
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self.u.x,self.v.x,self.axis.x,self.position.x,
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self.u.y,self.v.y,self.axis.y,self.position.y,
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self.u.z,self.v.z,self.axis.z,self.position.z,
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0.0,0.0,0.0,1.0)
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return FreeCAD.Placement(m)
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def save(self):
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"stores the current plane state"
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self.stored = [self.u,self.v,self.axis,self.position,self.weak]
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def setFromPlacement(self,pl):
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"sets the working plane from a placement (rotaton ONLY)"
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rot = FreeCAD.Placement(pl).Rotation
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self.u = rot.multVec(FreeCAD.Vector(1,0,0))
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self.v = rot.multVec(FreeCAD.Vector(0,1,0))
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self.axis = rot.multVec(FreeCAD.Vector(0,0,1))
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def restore(self):
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"restores a previously saved plane state, if exists"
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if self.stored:
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self.u = self.stored[0]
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self.v = self.stored[1]
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self.axis = self.stored[2]
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self.position = self.stored[3]
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self.weak = self.stored[4]
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self.stored = None
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def save(self):
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"stores the current plane state"
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self.stored = [self.u,self.v,self.axis,self.position,self.weak]
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def getLocalCoords(self,point):
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"returns the coordinates of a given point on the working plane"
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pt = point.sub(self.position)
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xv = DraftVecUtils.project(pt,self.u)
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x = xv.Length
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if xv.getAngle(self.u) > 1:
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x = -x
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yv = DraftVecUtils.project(pt,self.v)
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y = yv.Length
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if yv.getAngle(self.v) > 1:
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y = -y
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zv = DraftVecUtils.project(pt,self.axis)
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z = zv.Length
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if zv.getAngle(self.axis) > 1:
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z = -z
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return Vector(x,y,z)
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def restore(self):
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"restores a previously saved plane state, if exists"
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if self.stored:
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self.u = self.stored[0]
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self.v = self.stored[1]
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self.axis = self.stored[2]
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self.position = self.stored[3]
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self.weak = self.stored[4]
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self.stored = None
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def getGlobalCoords(self,point):
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"returns the global coordinates of the given point, taken relatively to this working plane"
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vx = DraftVecUtils.scale(self.u,point.x)
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vy = DraftVecUtils.scale(self.v,point.y)
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vz = DraftVecUtils.scale(self.axis,point.z)
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pt = (vx.add(vy)).add(vz)
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return pt.add(self.position)
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def getLocalCoords(self,point):
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"returns the coordinates of a given point on the working plane"
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pt = point.sub(self.position)
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xv = DraftVecUtils.project(pt,self.u)
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x = xv.Length
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if xv.getAngle(self.u) > 1:
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x = -x
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yv = DraftVecUtils.project(pt,self.v)
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y = yv.Length
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if yv.getAngle(self.v) > 1:
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y = -y
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zv = DraftVecUtils.project(pt,self.axis)
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z = zv.Length
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if zv.getAngle(self.axis) > 1:
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z = -z
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return Vector(x,y,z)
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||||
|
||||
def getLocalRot(self,point):
|
||||
"Same as getLocalCoords, but discards the WP position"
|
||||
xv = DraftVecUtils.project(point,self.u)
|
||||
x = xv.Length
|
||||
if xv.getAngle(self.u) > 1:
|
||||
x = -x
|
||||
yv = DraftVecUtils.project(point,self.v)
|
||||
y = yv.Length
|
||||
if yv.getAngle(self.v) > 1:
|
||||
y = -y
|
||||
zv = DraftVecUtils.project(point,self.axis)
|
||||
z = zv.Length
|
||||
if zv.getAngle(self.axis) > 1:
|
||||
z = -z
|
||||
return Vector(x,y,z)
|
||||
def getGlobalCoords(self,point):
|
||||
"returns the global coordinates of the given point, taken relatively to this working plane"
|
||||
vx = DraftVecUtils.scale(self.u,point.x)
|
||||
vy = DraftVecUtils.scale(self.v,point.y)
|
||||
vz = DraftVecUtils.scale(self.axis,point.z)
|
||||
pt = (vx.add(vy)).add(vz)
|
||||
return pt.add(self.position)
|
||||
|
||||
def getGlobalRot(self,point):
|
||||
"Same as getGlobalCoords, but discards the WP position"
|
||||
vx = DraftVecUtils.scale(self.u,point.x)
|
||||
vy = DraftVecUtils.scale(self.v,point.y)
|
||||
vz = DraftVecUtils.scale(self.axis,point.z)
|
||||
pt = (vx.add(vy)).add(vz)
|
||||
return pt
|
||||
def getLocalRot(self,point):
|
||||
"Same as getLocalCoords, but discards the WP position"
|
||||
xv = DraftVecUtils.project(point,self.u)
|
||||
x = xv.Length
|
||||
if xv.getAngle(self.u) > 1:
|
||||
x = -x
|
||||
yv = DraftVecUtils.project(point,self.v)
|
||||
y = yv.Length
|
||||
if yv.getAngle(self.v) > 1:
|
||||
y = -y
|
||||
zv = DraftVecUtils.project(point,self.axis)
|
||||
z = zv.Length
|
||||
if zv.getAngle(self.axis) > 1:
|
||||
z = -z
|
||||
return Vector(x,y,z)
|
||||
|
||||
def getGlobalRot(self,point):
|
||||
"Same as getGlobalCoords, but discards the WP position"
|
||||
vx = DraftVecUtils.scale(self.u,point.x)
|
||||
vy = DraftVecUtils.scale(self.v,point.y)
|
||||
vz = DraftVecUtils.scale(self.axis,point.z)
|
||||
pt = (vx.add(vy)).add(vz)
|
||||
return pt
|
||||
|
||||
def getClosestAxis(self,point):
|
||||
"returns which of the workingplane axes is closest from the given vector"
|
||||
ax = point.getAngle(self.u)
|
||||
ay = point.getAngle(self.v)
|
||||
az = point.getAngle(self.axis)
|
||||
bx = point.getAngle(DraftVecUtils.neg(self.u))
|
||||
by = point.getAngle(DraftVecUtils.neg(self.v))
|
||||
bz = point.getAngle(DraftVecUtils.neg(self.axis))
|
||||
b = min(ax,ay,az,bx,by,bz)
|
||||
if b in [ax,bx]:
|
||||
return "x"
|
||||
elif b in [ay,by]:
|
||||
return "y"
|
||||
elif b in [az,bz]:
|
||||
return "z"
|
||||
else:
|
||||
return None
|
||||
def getClosestAxis(self,point):
|
||||
"returns which of the workingplane axes is closest from the given vector"
|
||||
ax = point.getAngle(self.u)
|
||||
ay = point.getAngle(self.v)
|
||||
az = point.getAngle(self.axis)
|
||||
bx = point.getAngle(DraftVecUtils.neg(self.u))
|
||||
by = point.getAngle(DraftVecUtils.neg(self.v))
|
||||
bz = point.getAngle(DraftVecUtils.neg(self.axis))
|
||||
b = min(ax,ay,az,bx,by,bz)
|
||||
if b in [ax,bx]:
|
||||
return "x"
|
||||
elif b in [ay,by]:
|
||||
return "y"
|
||||
elif b in [az,bz]:
|
||||
return "z"
|
||||
else:
|
||||
return None
|
||||
|
||||
def getPlacementFromPoints(points):
|
||||
"returns a placement from a list of 3 or 4 vectors"
|
||||
pl = plane()
|
||||
try:
|
||||
pl.position = points[0]
|
||||
pl.u = (points[1].sub(points[0]).normalize())
|
||||
pl.v = (points[2].sub(points[0]).normalize())
|
||||
if len(points) == 4:
|
||||
pl.axis = (points[3].sub(points[0]).normalize())
|
||||
else:
|
||||
pl.axis = ((pl.u).cross(pl.v)).normalize()
|
||||
except:
|
||||
pass
|
||||
p = pl.getPlacement()
|
||||
del pl
|
||||
return p
|
||||
"returns a placement from a list of 3 or 4 vectors"
|
||||
pl = plane()
|
||||
try:
|
||||
pl.position = points[0]
|
||||
pl.u = (points[1].sub(points[0]).normalize())
|
||||
pl.v = (points[2].sub(points[0]).normalize())
|
||||
if len(points) == 4:
|
||||
pl.axis = (points[3].sub(points[0]).normalize())
|
||||
else:
|
||||
pl.axis = ((pl.u).cross(pl.v)).normalize()
|
||||
except:
|
||||
pass
|
||||
p = pl.getPlacement()
|
||||
del pl
|
||||
return p
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user