solver: improve redundancy checking of implicit constraints

Related #403
assembly: support drag and drop reordering of constraint and elements
2021-01-11 10:00:10 +08:00 · 2021-01-10 13:03:25 +08:00 · 2021-01-08 20:56:32 +08:00 · 2021-01-08 17:24:39 +08:00 · 2021-01-08 17:22:56 +08:00 · 2021-01-08 16:18:04 +08:00
114 changed files with 5937 additions and 573 deletions
--- a/.github/FUNDING.yml
+++ b/.github/FUNDING.yml
@ -0,0 +1,9 @@
+# These are supported funding model platforms
+
+github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: thundereal
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+custom: # Replace with a single custom sponsorship URL
--- a/.gitmodules
+++ b/.gitmodules
@ -1,9 +0,0 @@
-[submodule "slvs"]
-	path = slvs
-	url = https://github.com/realthunder/solvespace.git
-[submodule "py_slvs"]
-	path = py_slvs
-	url = https://github.com/realthunder/py_slvs.git
-[submodule "py_slvs_mac"]
-	path = py_slvs_mac
-	url = https://github.com/realthunder/py_slvs_mac.git
--- a/MANIFEST.in
+++ b/MANIFEST.in
@ -0,0 +1 @@
+recursive-include freecad/asm3/Gui *
--- a/Readme.md
+++ b/Readme.md
@ -1,6 +1,8 @@
 # Assembly3 Workbench for FreeCAD

-[![paypal](https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=2SM8GY3U2UUJN)
+[![Patreon](https://img.shields.io/badge/patreon-donate-blue.svg)](https://www.patreon.com/thundereal)
+[![Liberapay](http://img.shields.io/liberapay/patrons/realthunder.svg?logo=liberapay)](https://liberapay.com/realthunder/donate)
+[![paypal](https://img.shields.io/badge/Donate-PayPal-blue.svg)](https://www.paypal.me/realthunder)

 Assembly3 workbench is yet another attempt to bring assembly capability to
 [FreeCAD](http://www.freecadweb.org/). There is the original unfinished
--- a/freecad/init.py
+++ b/freecad/init.py
@ -0,0 +1 @@
+__path__ = __import__('pkgutil').extend_path(__path__, __name__)
--- a/freecad/asm3/FCADLogger.py
+++ b/freecad/asm3/FCADLogger.py
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+        <dc:publisher>
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+        <dc:contributor>
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--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintAxial.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintAxial.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintBidirectional.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintBidirectional.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintCoincidence.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintCoincidence.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintColinear.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintColinear.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintDiameter.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintDiameter.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintDistance.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintDistance.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintEqual.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintEqual.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintEqualAngle.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintEqualAngle.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintEqualLength.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintEqualLength.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintEqualLineArcLength.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintEqualLineArcLength.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintEqualPointLineDistance.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintEqualPointLineDistance.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintEqualRadius.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintEqualRadius.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintGeneral.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintGeneral.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintLengthDifference.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintLengthDifference.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintLengthEqualPointLineDistance.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintLengthEqualPointLineDistance.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintLengthRatio.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintLengthRatio.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintLineHorizontal.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintLineHorizontal.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintLineLength.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintLineLength.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintLineVertical.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintLineVertical.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintLock.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintLock.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintMidPoint.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintMidPoint.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintMore.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintMore.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintMultiParallel.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintMultiParallel.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintOrientation.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintOrientation.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintParallel.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintParallel.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPerpendicular.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPerpendicular.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointCoincident.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointCoincident.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointDistance.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointDistance.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointInPlane.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointInPlane.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointLineDistance.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointLineDistance.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointOnCircle.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointOnCircle.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointOnLine.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointOnLine.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointPlaneDistance.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointPlaneDistance.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointsDistance.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointsDistance.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointsHorizontal.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointsHorizontal.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointsProjectDistance.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointsProjectDistance.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointsSymmetric.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointsSymmetric.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointsVertical.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintPointsVertical.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintSketchPlane.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintSketchPlane.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintSymmetric.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintSymmetric.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintSymmetricLine.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintSymmetricLine.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintUnidirectional1.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintUnidirectional1.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintUnidirectional2.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_ConstraintUnidirectional2.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_MeasureAngle.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_MeasureAngle.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_MeasurePointDistance.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_MeasurePointDistance.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_MeasurePointLineDistance.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_MeasurePointLineDistance.svg
--- a/freecad/asm3/Gui/Resources/icons/constraints/Assembly_MeasurePointPlaneDistance.svg
+++ b/freecad/asm3/Gui/Resources/icons/constraints/Assembly_MeasurePointPlaneDistance.svg
--- a/freecad/asm3/init.py
+++ b/freecad/asm3/init.py
@ -0,0 +1 @@
+__version__ = "0.11.0"
--- a/freecad/asm3/assembly.py
+++ b/freecad/asm3/assembly.py
--- a/freecad/asm3/constraint.py
+++ b/freecad/asm3/constraint.py
@ -1,7 +1,10 @@
 from collections import namedtuple
 import FreeCAD, FreeCADGui, Part
 from . import utils, gui
-from .deps import with_metaclass
+try:
+    from six import with_metaclass
+except ImportError:
+    from .deps import with_metaclass
 from .utils import objName,cstrlogger as logger, guilogger
 from .proxy import ProxyType, PropertyInfo, propGet, propGetValue

@ -180,8 +183,8 @@ def _l(solver,partInfo,subname,shape,retAll=False):
        system.log('cache {}: {}',key,h)
    else:
        nameTag = partInfo.PartName + '.' + key
+        v = utils.getVertexes(shape)
        if utils.isDraftWire(part):
-            v = shape.Edge1.Vertexes
            vname1,vname2 = utils.edge2VertexIndex(part,subname)
            if not vname1:
                raise RuntimeError('Invalid draft subname {} or {}'.format(
@ -189,9 +192,12 @@ def _l(solver,partInfo,subname,shape,retAll=False):
            tp0 = _p(solver,partInfo,vname1,v[0])
            tp1 = _p(solver,partInfo,vname2,v[1])
        else:
-            v = shape.Edge1.Vertexes
            system.NameTag = nameTag + 'p0'
-            p0 = system.addPoint3dV(*v[0].Point)
+            try:
+                p0 = system.addPoint3dV(*v[0].Point)
+            except Exception:
+                logger.info(system.NameTag)
+                raise
            system.NameTag = nameTag + 'p0t'
            tp0 = system.addTransform(p0,*partInfo.Params,group=partInfo.Group)
            system.NameTag = nameTag + 'p1'
@ -239,17 +245,21 @@ def _lw(solver,partInfo,subname,shape,retAll=False):
    'return a handle for either a line or a plane depending on the shape'
    _ = retAll
    if not solver:
-        if utils.isLinearEdge(shape) or utils.isPlanar(shape):
+        if utils.isLinearEdge(shape) or \
+           utils.isPlanar(shape) or \
+           utils.isCylindricalPlane(shape):
            return
-        return 'a linear edge or edge/face with planar surface'
+        return 'a linear edge or edge/face with planar or cylindrical surface'
    if utils.isLinearEdge(shape):
        return _l(solver,partInfo,subname,shape,False)
+    if utils.isCylindricalPlane(shape):
+        return _n(solver,partInfo,subname,shape,False)
    return _wa(solver,partInfo,subname,shape)

-def _w(solver,partInfo,subname,shape,retAll=False):
+def _w(solver,partInfo,subname,shape,retAll=False,noCheck=False):
    'return a handle of a transformed plane/workplane from "shape"'
    if not solver:
-        if utils.isPlanar(shape):
+        if noCheck or utils.isPlanar(shape):
            return
        return 'an edge/face with a planar surface'

@ -271,6 +281,10 @@ def _wa(solver,partInfo,subname,shape,retAll=False):
    _ = retAll
    return _w(solver,partInfo,subname,shape,True)

+def _wa_no_check(solver,partInfo,subname,shape,retAll=False):
+    _ = retAll
+    return _w(solver,partInfo,subname,shape,True,True)
+
 def _c(solver,partInfo,subname,shape,requireArc=False,retAll=False):
    'return a handle of a transformed circle/arc derived from "shape"'
    if not solver:
@ -279,7 +293,7 @@ def _c(solver,partInfo,subname,shape,requireArc=False,retAll=False):
            if requireArc and not isinstance(r,tuple):
                return 'an arc edge'
            return
-        return 'a cicular edge'
+        return 'a circular edge'
    if requireArc:
        key = subname+'.a'
    else:
@ -346,7 +360,7 @@ def _c(solver,partInfo,subname,shape,requireArc=False,retAll=False):
        pln = _w(solver,partInfo,subname,shape,True)
        r = utils.getElementCircular(shape)
        if not r:
-            raise RuntimeError('shape is not cicular')
+            raise RuntimeError('shape is not circular')
        system.NameTag = nameTag + '.r'
        hr = system.addDistanceV(r)
        if requireArc or isinstance(r,(list,tuple)):
@ -423,6 +437,7 @@ class ConstraintCommand:
        return self._active

    def onSelectionChange(self,hasSelection):
+        Constraint._selInfo = None
        self._active = None if hasSelection else False

 class Constraint(ProxyType):
@ -431,6 +446,7 @@ class Constraint(ProxyType):
    _typeID = '_ConstraintType'
    _typeEnum = 'ConstraintType'
    _disabled = 'Disabled'
+    _selInfo = None

    @classmethod
    def register(mcs,cls):
@ -494,14 +510,14 @@ class Constraint(ProxyType):
        return mcs.getProxy(obj).prepare(obj,solver)

    @classmethod
-    def getFixedParts(mcs,solver,cstrs,partGroup):
+    def getFixedParts(mcs,solver,cstrs,partGroup,rollback):
        firstInfo = None
        if partGroup.Proxy.derivedParts:
            ret = set(partGroup.Proxy.derivedParts)
        else:
            ret = set()
-        from .assembly import isTypeOf, AsmWorkPlane
-        for obj in partGroup.Group:
+        from .assembly import isTypeOf, AsmWorkPlane, flattenGroup
+        for obj in flattenGroup(partGroup):
            if not hasattr(obj,'Placement'):
                ret.add(obj)
                logger.debug('part without Placement {}',objName(obj))
@ -510,9 +526,13 @@ class Constraint(ProxyType):
                logger.debug('fix workplane {}',objName(obj))
        found = len(ret)

+        attachments = []
        for obj in cstrs:
            cstr = mcs.getProxy(obj)

+            if isinstance(cstr, Attachment):
+                attachments.append(obj)
+
            # Build array constraint map for constraint multiplication
            if mcs.canMultiply(obj):
                element0 = obj.Proxy.getElements()[0].Proxy
@ -553,6 +573,108 @@ class Constraint(ProxyType):
                    logger.debug('\t{}.{}',o[0].Name,o[1])
                else:
                    logger.debug('\t{}',o.Name)
+
+        if not ret:
+            return ret
+
+        # Early solving for Attachment constraint, which requires only simple
+        # matrix calculation. We only solve those directly or indirectly
+        # attached to some fixed part, and treat the rest as PlaneCoincident
+        # with locked angle.
+
+        from .assembly import setPlacement
+        handled = set()
+        while True:
+            nxt = []
+            for obj in attachments:
+                cstr = obj.Proxy
+
+                firstInfo = []
+                infos = []
+
+                if obj.Cascade:
+                    # for cascading attachment, we should handle it if there is
+                    # any fixed part inside. We also need to sort the element
+                    # pairs properly so that they can be recognized as fixed one
+                    # after another
+                    prev = None
+                    fixed = None
+                    for e in cstr.getElements():
+                        info = e.Proxy.getInfo()
+                        if prev and prev.Part!=info.Part:
+                            firstInfo.append(prev)
+                            infos.append(info)
+                            if fixed is None \
+                                    and (prev.Part in ret or info.Part in ret):
+                                fixed = len(firstInfo)
+                        prev = info
+
+                    if fixed is None:
+                        continue
+
+                    if fixed:
+                        # reorder the element pairs to put the pair with the
+                        # fixed part first, and then reversed the ones that are
+                        # before it.
+                        firstInfo = firstInfo[fixed:] +\
+                                list(reversed(firstInfo[:fixed]))
+                        infos = infos[fixed:] + list(reversed(infos[:fixed]))
+                else:
+                    if not mcs.canMultiply(obj):
+                        infos = cstr.getElementsInfo()
+                        firstInfo = [infos[0]]*(len(infos)-1)
+                        infos = infos[1:]
+                    else:
+                        elements = cstr.getElements()
+                        firstInfo = elements[0].Proxy.getInfo(expand=True)
+                        infos = []
+                        for element in elements[1:]:
+                            infos += element.Proxy.getInfo(expand=True)
+                        count = min(len(infos),len(firstInfo))
+                        firstInfo = firstInfo[:count]
+                        infos = infos[:count]
+
+                    if any([ not (info0.Part in ret or info.Part in ret)
+                            for info0,info in zip(firstInfo,infos)]):
+                        # we only handle if all element pair has at least one
+                        # part that are fixed
+                        continue
+
+                if rollback is not False:
+                    handled.add(obj)
+
+                for info0,info in zip(firstInfo,infos):
+                    if info.Part in ret:
+                        if info0.Part in ret:
+                            logger.warn('skip fixed part "{}" and "{}" in {}',
+                                info.PartName,info0.PartName,cstrName(obj))
+                            continue
+                        info0,info = info,info0
+
+                    ret.add(info.Part)
+
+                    pla0 = info0.Placement.multiply(
+                            utils.getElementPlacement(info0.Shape))
+                    pla = pla0.multiply(
+                            utils.getElementPlacement(info.Shape).inverse())
+                    if rollback is not False and \
+                            not utils.isSamePlacement(pla,info.Placement):
+                        solver.touched = True
+                        solver.system.log('attaching "{}" -> "{}"',
+                                info.PartName, info0.PartName)
+                        if rollback is not None:
+                            rollback.append((info.PartName,
+                                            info.Part,
+                                            info.Placement.copy()))
+                        setPlacement(info.Part,pla)
+
+            if len(nxt) == len(attachments):
+                break
+            attachments = nxt
+
+        if handled:
+            cstrs[:] = [ obj for obj in cstrs if obj not in handled ]
+
        return ret

    @classmethod
@ -594,6 +716,11 @@ class Constraint(ProxyType):
            else:
                obj.setExpression('.Label2', None)

+    @classmethod
+    def isAttachment(mcs, obj):
+        cstr = mcs.getProxy(obj)
+        return isinstance(cstr, Attachment)
+

 def _makeProp(name,tp,doc='',getter=propGet,internal=False,default=None):
    return PropertyInfo(Constraint,name,tp,doc,getter=getter,duplicate=True,
@ -674,8 +801,11 @@ class Base(with_metaclass(Constraint, object)):
    @classmethod
    def checkActive(cls):
        from .assembly import AsmConstraint
-        info = guilogger.catchTrace('selection "{}" exception'.format(
-                cls.getName()), AsmConstraint.getSelection, cls._id)
+        if not Constraint._selInfo:
+            Constraint._selInfo = guilogger.catchTrace(
+                    'selection "{}" exception'.format(
+                        cls.getName()), AsmConstraint.getSelection, cls._id)
+        info = Constraint._selInfo
        if not info:
            return False
        if cls._activeWithElement and not info.Elements:
@ -694,7 +824,7 @@ class Base(with_metaclass(Constraint, object)):
            return getattr(solver.system,name)
        except AttributeError:
            logger.warn('{} not supported in solver "{}"',
-                cstrName(obj),solver.getName())
+                cstrName(obj),solver.system.getName())

    @classmethod
    def getEntityDef(cls,elements,checkCount,obj=None):
@ -873,7 +1003,7 @@ class Locked(Base):

        nameTag = partInfo.PartName + '.' + info.Subname

-        for i,v in enumerate(info.Shape.Vertexes):
+        for i,v in enumerate(utils.getVertexes(info.Shape)):
            surfix = '.fp{}'.format(i)
            system.NameTag = nameTag + surfix

@ -1045,7 +1175,8 @@ class BaseMulti(Base):
                    e = cls._entityDef[0](
                            solver,partInfo,info.Subname,info.Shape)
                    params = props + [e0,e]
-                    solver.system.checkRedundancy(obj,partInfo0,partInfo)
+                    solver.system.checkRedundancy(
+                            obj,partInfo0,partInfo,info0.SubnameRef,info.SubnameRef)
                    h = func(*params,group=solver.group)
                    if isinstance(h,(list,tuple)):
                        ret += list(h)
@ -1084,8 +1215,10 @@ class BaseMulti(Base):
            elements.append(e)

        if len(elements)<=1:
-            logger.warn('{} has no effective constraint',cstrName(obj))
+            logger.warn('{} has no effective constraining element',
+                    cstrName(obj))
            return
+
        e0 = None
        e = None
        info0 = None
@ -1096,16 +1229,19 @@ class BaseMulti(Base):
            if i==idx0:
                e0 = cls._entityDef[idx0](
                        solver,partInfo,info.Subname,info.Shape)
+                subname0 = info.SubnameRef
                info0 = partInfo
            else:
                e = cls._entityDef[0](solver,partInfo,info.Subname,info.Shape)
            if e0 and e:
                if idx0:
                    params = props + [e,e0]
-                    solver.system.checkRedundancy(obj,partInfo,info0)
+                    solver.system.checkRedundancy(
+                            obj,partInfo,info0,info.SubnameRef,subname0)
                else:
                    params = props + [e0,e]
-                    solver.system.checkRedundancy(obj,info0,partInfo)
+                    solver.system.checkRedundancy(
+                            obj,info0,partInfo,subname0,info.SubnameRef)
                h = func(*params,group=solver.group)
                if isinstance(h,(list,tuple)):
                    ret += list(h)
@ -1138,7 +1274,8 @@ class BaseCascade(BaseMulti):
                params = props + [e1,e2]
            else:
                params = props + [e2,e1]
-            solver.system.checkRedundancy(obj,prevInfo,partInfo)
+            solver.system.checkRedundancy(
+                    obj,prevInfo,partInfo,prev.SubnameRef,info.SubnameRef)
            h = func(*params,group=solver.group)
            if isinstance(h,(list,tuple)):
                ret += list(h)
@ -1164,10 +1301,21 @@ class PlaneCoincident(BaseCascade):
    _iconName = 'Assembly_ConstraintCoincidence.svg'
    _props = ['Multiply','Cascade','Offset','OffsetX','OffsetY'] + _AngleProps
    _tooltip = \
-      'Add a "{}" constraint to conincide planar faces of two or more parts.\n'\
+      'Add a "{}" constraint to coincide planar faces of two or more parts.\n'\
      'The faces are coincided at their centers with an optional distance.'


+class Attachment(BaseCascade):
+    _id = 45
+    _iconName = 'Assembly_ConstraintAttachment.svg'
+    _props = ['Multiply', 'Cascade']
+    _tooltip = \
+      'Add a "{}" constraint to attach two parts by the selected geometry\n'\
+      'elements. This constraint completely fixes the parts relative to each\n'\
+      'other.'
+    _entityDef = (_wa_no_check,)
+
+
 class AxialAlignment(BaseMulti):
    _id = 36
    _entityDef = (_lna,)
@ -1249,7 +1397,7 @@ class PointsCoincident(Base):
    _entityDef = (_p,_p)
    _workplane = True
    _iconName = 'Assembly_ConstraintPointCoincident.svg'
-    _tooltips = 'Add a "{}" constraint to conincide two points in 2D or 3D'
+    _tooltips = 'Add a "{}" constraint to coincide two points in 2D or 3D'


 class PointInPlane(BaseMulti):
@ -1268,6 +1416,8 @@ class PointOnLine(Base):

    @classmethod
    def prepare(cls,obj,solver):
+        if cls._measure:
+            return
        func = cls.constraintFunc(obj,solver)
        if not func:
            return
@ -1303,7 +1453,7 @@ class PointsDistance(BaseCascade):

    @classmethod
    def init(cls,obj):
-        points = [ info.Placement.multVec(info.Shape.Vertex1.Point)
+        points = [ info.Placement.multVec(utils.getElementPos(info.Shape))
                    for info in obj.Proxy.getElementsInfo()[:2] ]
        obj.Distance = points[0].distanceToPoint(points[1])

@ -1320,7 +1470,7 @@ class PointsPlaneDistance(BaseMulti):
    @classmethod
    def init(cls,obj):
        infos = obj.Proxy.getElementsInfo()[:2]
-        points = [ info.Placement.multVec(info.Shape.Vertex1.Point)
+        points = [ info.Placement.multVec(utils.getElementPos(info.Shape))
                   for info in infos ]
        rot = utils.getElementRotation(infos[1].Shape)
        axis = infos[1].Placement.Rotation.multVec(
@ -1338,7 +1488,7 @@ class PointLineDistance(PointOnLine):
    @classmethod
    def init(cls,obj):
        infos = obj.Proxy.getElementsInfo()
-        p1 = infos[0].Placement.multVec(infos[0].Shape.Vertex1.Point)
+        p1 = infos[0].Placement.multVec(utils.getElementPos(infos[0].Shape))
        p2 = infos[1].Placement.multVec(infos[1].Shape.Vertex1.Point)
        p3 = infos[1].Placement.multVec(infos[1].Shape.Vertex2.Point)
        if len(infos)==3:
@ -1415,7 +1565,7 @@ class PointDistance(Base2):
    @classmethod
    def init(cls,obj):
        infos = obj.Proxy.getElementsInfo()
-        ps = [ info.Placement.multVec(info.Shape.Vertex1.Point)
+        ps = [ info.Placement.multVec(utils.getElementPos(info.Shape))
                   for info in infos ]
        if len(infos)==3:
            rot = infos[2].Placement.Rotation.multiply(
@ -1532,10 +1682,10 @@ class SketchPlane(BaseSketch):

        # if there is any child element in this constraint, we expect the first
        # one to be a planar face or edge to define the work plane. The rest of
-        # entities must be from some draft wire or circle/arc 
+        # entities must be from some draft wire or circle/arc
        #
        # Base.prepare() will call system.addSketchPlane() with all contained
-        # element below. However, the default implementation, 
+        # element below. However, the default implementation,
        # SystemExtension.addSketchPlane(),  only really uses the first one,
        # i.e. the one obtained by _wa(), i.e. a tuple of entities
        # (workplane,base,normal).
@ -1653,7 +1803,7 @@ class MidPoint(BaseSketch):
        if not func:
            return
        params = cls.getPropertyValues(obj) + cls.getEntities(obj,solver)
-        # temparary fix of slvs.addMidPoint(), which should have made wrkpln
+        # temporary fix of slvs.addMidPoint(), which should have made wrkpln
        # argument optional and defaults to 0
        if len(params)==2:
            params.append(0)
@ -1699,7 +1849,7 @@ class PointsProjectDistance(BaseSketch):
    @classmethod
    def init(cls,obj):
        infos = obj.Proxy.getElementsInfo()
-        ps = [ info.Placement.multVec(info.Shape.Vertex1.Point)
+        ps = [ info.Placement.multVec(utils.getElementPos(info.Shape))
                   for info in infos ]
        p3 = infos[2].Placement.multVec(infos[2].Shape.Vertex2.Point)
        p1,p2 = [ utils.projectToLine(p,ps[2],p3) for p in ps[:2] ]
--- a/freecad/asm3/deps/init.py
+++ b/freecad/asm3/deps/init.py
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Zheng, Lei	bc2d5d611f	solver: improve redundancy checking of implicit constraints Related #403	2021-01-11 10:00:10 +08:00
Zheng, Lei	e785510c68	assembly: support drag and drop reordering of constraint and elements	2021-01-10 13:03:25 +08:00
Zheng, Lei	b9c7af40fd	assembly: fix 'Flip element' for multiplied constraining element	2021-01-08 20:56:32 +08:00
Zheng, Lei	b590b57793	mover: fix auto recompute on moving linked assembly	2021-01-08 17:24:39 +08:00
Zheng, Lei	6c68f0f901	assembly: support flip part of multiplied constraining elements	2021-01-08 17:22:56 +08:00
Zheng, Lei	caad48e927	assembly: reduce constraint multiplication init placement precision	2021-01-08 16:18:04 +08:00
Zheng, Lei	70d161f336	assembly: fix relation selection highlight when using GoToRelation	2021-01-05 15:25:43 +08:00
Zheng, Lei	c6f6c481d2	assembly: fix stray relations when deleting assembly	2021-01-05 15:25:34 +08:00
Zheng, Lei	fe6a792202	assembly: fix workplane orientation Fixes #362	2020-12-01 20:40:19 +08:00
Zheng, Lei	da050987f5	assembly: fix constraint multiplication with sub-assembly Related #341	2020-11-16 20:52:45 +08:00
Zheng, Lei	6fbded4460	assembly: fix freeze toggling behavior Related #342	2020-11-16 20:50:40 +08:00
Zheng, Lei	6bb16b5550	system: improve auto relax multiple PlaneCoincidence	2020-11-12 20:58:36 +08:00
lilaL	c3380e602d	Typo fix	2020-11-12 20:57:48 +08:00
Zheng, Lei	9f4fa40b8f	constraint: support cylindrical face in MultiParallel	2020-10-26 20:37:34 +08:00
Zheng, Lei	4edc0fbca6	Gui: fix call of FreeCADGui.Command.isActive()	2020-09-26 16:25:01 +08:00
Zheng, Lei	490da82590	gui: fix command active detection	2020-09-26 09:33:06 +08:00
Zheng, Lei	e44f47073b	system: lock angle when convert Attachment to PlaneCoincident	2020-08-04 09:08:55 +08:00
Zheng, Lei	0c1f659fde	assembly: fix constraint multiply element update	2020-07-28 18:20:01 +08:00
Zheng, Lei	5da0bd5554	assembly: improve AsmElement fix element	2020-07-28 18:20:01 +08:00
Zheng, Lei	14dffc7b28	assembly: fix ViewProviderAsmElementLink bounding box calculation	2020-07-28 18:20:01 +08:00
Zheng, Lei	652ea7af6c	assembly: implement ViewProviderAsmElement(Link).getLinkedViewProvider() For better support the Std_LinkSelectLinked(Final) command	2020-07-28 18:19:53 +08:00
Zheng, Lei	c8cf0a1e32	gui: fix infinite recursion triggered by auto element visibility	2020-07-04 22:04:08 +08:00
Zheng, Lei	19163afe88	gui: disable transaction in command AsmCmdGotoRelation	2020-07-02 11:23:27 +08:00
Zheng, Lei	0acaa5e9c3	Avoid using getSubObject() to obtain shape	2020-07-02 09:17:24 +08:00
Zheng, Lei	9e34ecd1c0	mover: use SHIFT key to bypass recompute on moving	2020-06-29 17:36:54 +08:00
Zheng, Lei	3bd99b64d2	gui: clear up debug output	2020-06-15 16:46:25 +08:00
Zheng, Lei	9f904ede3f	assembly: improve backward compatibility	2020-06-15 16:46:11 +08:00
Zheng, Lei	72f64e9ed5	assembly: fixed AsmPartGroup.getSubObjects() when partial loaded	2020-05-25 09:36:31 +00:00
Zheng, Lei	91c34b2fcb	Add tree view context menu action for batch toggling constraints	2020-05-13 12:23:51 +08:00
Zheng, Lei	1cdf1fe5c4	assembly: fix assembly 'freeze' Fixes #286	2020-05-06 08:19:15 +08:00
Zheng, Lei	edac36d4df	gui: improve backward compatibility	2020-04-25 18:30:07 +08:00
Zheng, Lei	06f8edd493	gui: sync command button status	2020-04-08 05:56:57 +08:00
Zheng, Lei	68d31787ce	assembly: fix undo handling when multiply constraint	2020-04-07 16:50:10 +08:00
Zheng, Lei	28d2df2c3d	assembly: remove Assembly.Group Output status	2020-04-07 16:49:23 +08:00
Zheng, Lei	b74434e74e	Increase version to 0.11.0	2020-03-17 17:00:59 +08:00
looooo	3158b79746	add setup.py	2020-03-17 10:47:21 +08:00
Zheng, Lei	b0a168ff2f	assembly: improve selection after drag and drop	2020-03-17 10:46:50 +08:00
Zheng, Lei	541b6472ed	assembly: fix auto solve	2020-03-06 09:29:09 +08:00
Zheng, Lei	ebd9dd8a68	assembly: fix element offset/flip menu action	2020-03-04 16:36:17 +08:00
Zheng, Lei	c60a7b7f35	gui: enable quick solve button on editing	2020-03-04 16:33:05 +08:00
Zheng, Lei	d144351e35	assembly: enable auto solve without activating workbench	2020-03-04 16:32:39 +08:00
Zheng, Lei	cbe64d76d4	assembly: fix AsmConstraint bounding box calculation	2020-03-04 16:31:45 +08:00
Zheng, Lei	bb23fafaaa	assembly: add 'Move part' context menu action for AsmElement(Link)	2020-03-04 16:27:07 +08:00
Zheng, Lei	66d7fbd4fa	assembly: add 'Offset' and 'Flip' menu action for AsmElement(Link)	2020-03-03 09:42:24 +08:00
Zheng, Lei	f7c032ed5d	gui: enable some commands while editing	2020-03-03 09:40:11 +08:00
Zheng, Lei	e81b1bf7dc	assembly: fix log message	2020-02-27 05:52:48 +08:00
Zheng, Lei	3f120aced5	assembly: support auto fix in AsmElement	2020-02-26 12:07:45 +08:00
Zheng, Lei	89700cc1c1	Add AutoFixElement icon	2020-02-26 12:07:34 +08:00
Zheng, Lei	72ff4a98a3	assembly: fix backward compability	2020-02-17 18:14:02 +08:00
Zheng, Lei	357282a1b4	assembly: add toggle detach context menu for AsmElement	2020-02-17 14:50:45 +08:00
Zheng, Lei	63ca9a4ef0	assembly: fix ViewProviderAssembly legacy checking	2020-02-05 20:03:48 +08:00
Zheng, Lei	472a090cea	assembly: fix axis node setup in ViewProviderAsmElement	2020-02-05 20:03:48 +08:00
Zheng, Lei	b3d4354687	gui: fix 'ShowSelectionOnTop' detection	2020-02-05 20:03:45 +08:00
Zheng, Lei	c59ad55f68	assembly: improve element auto naming If a new element is created pointing to a named element, it will inherit its name. If not, then check to see if the element is pointing to an origin feature or datum, and inherit its name if so.	2020-02-05 17:52:06 +08:00
Zheng, Lei	9a9cdb8ac5	assembly: fix Python3 compatibility Closes #284	2020-02-04 17:11:35 +08:00
Zheng, Lei	3b6ba266c4	assembly: use new selection on top core feature	2019-10-28 18:18:29 +08:00
Zheng, Lei	6725da5c91	assembly: fix hasProperty()	2019-10-28 18:18:13 +08:00
Zheng, Lei	f1d1547e8e	assembly: replace hasattr() with hasProperty()	2019-10-24 14:35:46 +08:00
looooo	b7da4ecc41	do not block other namespace-packages	2019-10-12 07:20:59 +08:00
Zheng, Lei	62106d16f3	gui: adjust navigation toolbar	2019-10-05 11:04:10 +08:00
Zheng, Lei	9f1006f5b9	assembly: fix error on FC without topo naming	2019-09-22 21:09:20 +08:00
Zheng, Lei	5e6713ac3e	utils: change getIcon()	2019-09-03 11:49:24 +08:00
Zheng, Lei	a6690b64af	Restucture source tree Remove all submodules. Prepare for add-on manager inclusion.	2019-08-30 17:36:14 +08:00
Zheng, Lei	142eb5f420	assembly: add comment	2019-08-30 17:29:09 +08:00
Zheng, Lei	a35d058fc4	assembly: rename _LinkRecomputed to _LinkTouched	2019-07-19 12:03:51 +08:00
Zheng, Lei	91970fa3df	assembly: handle FC without topo naming	2019-07-15 17:41:55 +08:00
Zheng, Lei	42f3ed25ca	Move FUNDING	2019-07-14 06:28:24 +08:00
Zheng, Lei	99f581188f	Update slvs submodule Fixes #255	2019-07-11 08:26:27 +08:00
luz.paz	6a648cf66f	Fix source comment typos and whitespace Found via `codespell -q 3 -S ./slvs -L vertexes,dof`	2019-07-10 12:46:00 +08:00
Zheng, Lei	4a467bf670	assembly: fix part group migration error Fixes #252	2019-07-03 13:25:00 +08:00
Zheng, Lei	c927d00b4d	utils: fix isElement()	2019-07-02 10:43:51 +08:00
Zheng, Lei	56afcb63d8	assembly: trun on 'NoModify' for VisibilityList	2019-07-01 13:27:20 +08:00
Zheng, Lei	75632fee41	assembly: add selection after make assembly	2019-06-30 17:32:31 +08:00
Zheng, Lei	dbc64ebfc4	assembly: fix selection after drop in part group	2019-06-30 17:31:20 +08:00
Zheng, Lei	b536a9d374	constraint: remove planar requirement in Attachment constraint	2019-06-30 17:30:54 +08:00
Ben Gamari	73a8eb684c	Fix misspelling of "relative"	2019-06-30 11:10:19 +08:00
Ben Gamari	871010abf0	Fix a few mispellings of "relative"	2019-06-30 11:10:19 +08:00
Zheng, Lei	2979dfea9d	mover: fix checkFixedPart()	2019-06-12 07:20:44 +08:00
realthunder	f66358d9d3	Update Readme.md	2019-06-07 12:00:56 +08:00
realthunder	da1057e4e1	Create FUNDING.yml	2019-06-07 11:29:54 +08:00
Zheng, Lei	2238a3ba59	assembly: fix undo toggle freeze	2019-06-05 09:22:07 +08:00
Zheng, Lei	e1dbbf771f	assembly: flatten parts for exporting	2019-06-05 09:21:30 +08:00
Zheng, Lei	61c9d33f03	assembly: disable replaceObject() by default	2019-06-05 09:18:06 +08:00
Zheng, Lei	8fb0f956fe	assembly: fix AsmWorkPlane.getSelection()	2019-05-31 13:59:15 +08:00
Zheng, Lei	c497ef8aed	assembly: AsmElement sync ShowCS option on creating/loading	2019-05-31 10:08:33 +08:00
Zheng, Lei	a55177d7f2	gui: fix context menu	2019-05-30 09:48:11 +08:00
Zheng, Lei	c10ff837e2	assembly: fix auto recompute on moving	2019-05-29 13:18:03 +08:00
Zheng, Lei	26c05a44b1	constraint: optimize toolbar button status update	2019-05-29 13:15:47 +08:00
Zheng, Lei	0d4ed4f87b	gui: fix AsmWorkPlane command status update	2019-05-29 13:15:21 +08:00
Zheng, Lei	fa8a0e00d0	mover: fix QuickMover undo	2019-05-29 13:14:41 +08:00
Zheng, Lei	cc91aa105f	utils: use surface/curve Location/Position when available OCCT shape's visual location is affect by both the shape's placement and the shape's underlying surface/curve placement. So we can't just use shape's placement alone. When getting surface/curve location/position, the BRep_Adaptor will return a surface/curve with accumulated transformation.	2019-05-29 13:04:32 +08:00
Zheng, Lei	253b67fb83	utils: add missing 'Origin' for App::Placement	2019-05-29 13:03:57 +08:00
Zheng, Lei	43dd351c83	Fix system slvs module search	2019-05-25 13:29:25 +08:00
Zheng, Lei	32c602dc94	Update slvs submodule	2019-05-25 13:29:14 +08:00
Zheng, Lei	bc9f4e3cae	update slvs submodule	2019-05-25 07:43:11 +08:00
Zheng, Lei	380c95ad1f	Update slvs submodule	2019-05-24 08:22:31 +00:00
Zheng, Lei	dcef039b6f	Add slvs prebuilt for Python3	2019-05-24 07:43:17 +00:00
Zheng, Lei	c23ebe2bbd	assembly: minor change of error message	2019-05-20 08:30:05 +08:00
Zheng, Lei	ce3193946a	assembly: improve constraint mutliplication It can now auto change any part into link array if necessary.	2019-05-19 11:40:44 +08:00
Zheng, Lei	049eca5bdb	assembly: do not show axis cross for multipled elements	2019-05-19 11:40:19 +08:00
Zheng, Lei	a8e32a0ed9	assembly: use signalBeforeCloseTransaction for auto solving	2019-05-19 11:36:26 +08:00
Zheng, Lei	6f17a7083f	gui: fix group command menu text	2019-05-19 11:31:42 +08:00
Zheng, Lei	0748352f4a	constraint: add Attachment constraint	2019-05-19 11:30:32 +08:00
Zheng, Lei	c21b69901c	Add some icon	2019-05-19 11:26:38 +08:00
Zheng, Lei	d687c8e15a	utils: change logger hierarchy	2019-05-19 11:26:13 +08:00
Zheng, Lei	8620c99456	assembly: fix compatibility issue Fixes #244	2019-05-12 16:35:15 +08:00
Zheng, Lei	dcef517f04	utils: fix isInfinite()	2019-05-12 16:30:09 +08:00
Zheng, Lei	4ba221c5bb	gui: add command for adding App::Placement	2019-05-09 20:12:56 +08:00
Zheng, Lei	d23f34247d	assembly: use AxisOrigin for axis rendering and picking	2019-05-09 20:12:20 +08:00
Zheng, Lei	e4a8423fa1	utils: improve handling of App::Placement	2019-05-09 20:11:21 +08:00
Zheng, Lei	134889c69c	assembly: show axis for element with infinite shape	2019-05-09 20:09:20 +08:00
Zheng, Lei	c99784e225	Add icon	2019-05-09 20:04:43 +08:00
Zheng, Lei	76ef4515e1	assembly: allow showing coordinate system in AsmElement	2019-05-08 19:56:36 +08:00
Zheng, Lei	f60914035a	Add icon	2019-05-08 19:56:30 +08:00
Zheng, Lei	28fb7a8b0c	utils: handle infinite face	2019-05-08 19:56:06 +08:00
Zheng, Lei	17a26e52f0	gui: add STEP import command	2019-05-07 16:16:05 +08:00
Zheng, Lei	d716d9208b	Add icons	2019-05-07 16:15:58 +08:00
Zheng, Lei	9f933de595	assembly: fix AsmWorkPlane.make()	2019-05-03 11:55:39 +08:00
Zheng, Lei	06a73f83ef	assembly: touch constraint group on child order change	2019-05-03 11:54:48 +08:00
Zheng, Lei	f7041b1625	gui: support moving item inside plain group	2019-05-03 09:03:08 +08:00
Zheng, Lei	383163d163	assembly: improve drag and drop of plain group	2019-05-03 08:54:28 +08:00
Zheng, Lei	381e970ac9	assembly: fix GotoRelation on grouped objects Fixes realthunder/FreeCAD_Assembly3#234	2019-04-30 21:25:22 +08:00
Zheng, Lei	279f5cd0bd	assembly: disable auto resolve while grouping	2019-04-30 21:25:12 +08:00
Zheng, Lei	cb3e5f4259	gui: fix GotoLinked command	2019-04-30 21:23:43 +08:00
Zheng, Lei	7f72f93d4e	assembly: change GoToRelation behavior on constraint and element	2019-04-30 12:08:47 +08:00
Zheng, Lei	ddd3250fdd	assembly: fix gotToRelation on grouped parts Fixes #234	2019-04-29 10:02:07 +08:00
Zheng, Lei	a3acabbdc4	gui: reorder toolbar buttons	2019-04-29 10:00:55 +08:00
Zheng, Lei	15dc5abd5d	assembly: fix AsmPlainGroup.make()	2019-04-27 20:25:48 +08:00
Zheng, Lei	49812ba3b5	assembly: fix AsmElement.make() Fixes #230	2019-04-13 08:13:33 +08:00
Zheng, Lei	cad2e8f86a	utils: fix getElementPos() one line edge Fixes #229 Related #225	2019-04-12 21:39:17 +08:00
Zheng, Lei	5b2583cddc	assembly: fix handling of undo/redo	2019-04-12 12:48:24 +08:00
Zheng, Lei	1a96bb2805	Fix handling of infinite line Fixes #222	2019-04-09 13:00:16 +08:00
Zheng, Lei	e73ad4cc87	assembly: support plain group Related #206	2019-04-08 07:48:30 +08:00
Zheng, Lei	a7887bd177	Add icon	2019-04-07 20:25:31 +08:00
Zheng, Lei	3b7f8dfccd	constraint: fix PointDistance Fixes #195	2019-02-14 07:33:34 +08:00
Zheng, Lei	4664316963	constraint: fix point position calculation in PointsDistance, PointLineDistance, and PointsPlaneDistance Fixes #188	2019-01-29 21:08:03 +08:00
Zheng, Lei	dab0eb5428	constraint: fix error message Fixes #187	2019-01-29 21:07:52 +08:00
Zheng, Lei	81c380d551	assembly: remove recompute on restoring constraint	2019-01-29 21:04:44 +08:00
				`@ -0,0 +1 @@`
				`__path__ = __import__('pkgutil').extend_path(__path__, __name__)`