def buildpathocc(self, obj, shape):
"""Build pocket Path using Native OCC algorithm."""
import Part
import DraftGeomUtils
from PathScripts.PathUtils import fmt, helicalPlunge, rampPlunge
FreeCAD.Console.PrintMessage(
translate("PathPocket",
"Generating toolpath with OCC native offsets.\n"))
# Build up the offset loops
output = ""
offsets = []
nextradius = (self.radius * 2) * (float(obj.StepOver) / 100)
result = DraftGeomUtils.pocket2d(shape, nextradius)
print "did we get something: " + str(result)
while result:
print "Adding " + str(len(result)) + " wires"
offsets.extend(result)
nextradius += (self.radius * 2) * (float(obj.StepOver) / 100)
result = DraftGeomUtils.pocket2d(shape, nextradius)
# revert the list so we start with the outer wires
if obj.StartAt != 'Edge':
offsets.reverse()
plungePos = None
rampEdge = None
if obj.UseEntry:
# Try to find an entry location
toold = self.radius * 2
helixBounds = DraftGeomUtils.pocket2d(
shape, self.radius * (1 + obj.HelixSize))
if helixBounds:
rampD = obj.RampSize
if obj.StartAt == 'Edge':
plungePos = helixBounds[0].Edges[0].Vertexes[0].Point
else:
plungePos = offsets[0].Edges[0].Vertexes[0].Point
# If it turns out this is invalid for some reason, nuke plungePos
[perp, idx] = DraftGeomUtils.findPerpendicular(
plungePos, shape.Edges)
if not perp or perp.Length < self.radius * (1 +
obj.HelixSize):
plungePos = None
FreeCAD.Console.PrintError(
translate("PathPocket",
"Helical Entry location not found.\n"))
# FIXME: Really need to do a point-in-polygon operation to make sure this is within helixBounds
# Or some math to prove that it has to be (doubt that's true)
# Maybe reverse helixBounds and pick off that?
if plungePos is None: # If we didn't find a place to helix, how about a ramp?
FreeCAD.Console.PrintMessage(
translate("PathPocket", "Attempting ramp entry.\n"))
if (offsets[0].Edges[0].Length >= toold * rampD) and not (
isinstance(offsets[0].Edges[0].Curve, Part.Circle)):
rampEdge = offsets[0].Edges[0]
# The last edge also connects with the starting location- try that
elif (offsets[0].Edges[-1].Length >= toold * rampD) and not (
isinstance(offsets[0].Edges[-1].Curve, Part.Circle)):
rampEdge = offsets[0].Edges[-1]
else:
FreeCAD.Console.PrintError(
translate("PathPocket",
"Ramp Entry location not found.\n"))
# print "Neither edge works: " + str(offsets[0].Edges[0]) + ", " + str(offsets[0].Edges[-1])
# FIXME: There's got to be a smarter way to find a place to ramp
fastZPos = obj.ClearanceHeight.Value
# For helix-ing/ramping, know where we were last time
# FIXME: Can probably get this from the "machine"?
lastZ = fastZPos
startPoint = None
for vpos in PathUtils.frange(obj.StartDepth.Value,
obj.FinalDepth.Value, obj.StepDown,
obj.FinishDepth.Value):
first = True
# loop over successive wires
for currentWire in offsets:
#output += PathUtils.convert(currentWire.Edges, "on", 1)
last = None
for edge in currentWire.Edges:
if not last:
# we set the base GO to our fast move to our starting pos
if first:
# If we can helix, do so
if plungePos:
output += helicalPlunge(
plungePos, obj.RampAngle, vpos, lastZ,
self.radius * 2, obj.HelixSize,
self.horizFeed)
# print output
lastZ = vpos
# Otherwise, see if we can ramp
# FIXME: This could be a LOT smarter (eg, searching for a longer leg of the edge to ramp along)
elif rampEdge:
output += rampPlunge(rampEdge, obj.RampAngle,
vpos, lastZ)
lastZ = vpos
# Otherwise, straight plunge... Don't want to, but sometimes you might not have a choice.
# FIXME: At least not with the lazy ramp programming above...
else:
print "WARNING: Straight-plunging... probably not good, but we didn't find a place to helix or ramp"
startPoint = edge.Vertexes[0].Point
output += "G0 X" + fmt(startPoint.x) + " Y" + fmt(startPoint.y) +\
" Z" + fmt(fastZPos) + "\n"
first = False
# then move slow down to our starting point for our profile
last = edge.Vertexes[0].Point
output += "G1 X" + fmt(last.x) + " Y" + fmt(
last.y) + " Z" + fmt(vpos) + "\n"
# if isinstance(edge.Curve,Part.Circle):
if DraftGeomUtils.geomType(edge) == "Circle":
point = edge.Vertexes[-1].Point
if point == last: # edges can come flipped
point = edge.Vertexes[0].Point
center = edge.Curve.Center
relcenter = center.sub(last)
v1 = last.sub(center)
v2 = point.sub(center)
if v1.cross(v2).z < 0:
output += "G2"
else:
output += "G3"
output += " X" + fmt(point.x) + " Y" + fmt(
point.y) + " Z" + fmt(vpos)
output += " I" + fmt(relcenter.x) + " J" + fmt(
relcenter.y) + " K" + fmt(relcenter.z)
output += "\n"
last = point
else:
point = edge.Vertexes[-1].Point
if point == last: # edges can come flipped
point = edge.Vertexes[0].Point
output += "G1 X" + fmt(point.x) + " Y" + fmt(
point.y) + " Z" + fmt(vpos) + "\n"
last = point
# move back up
output += "G1 Z" + fmt(fastZPos) + "\n"
return output
def buildpathocc(self, obj, shape):
"""Build pocket Path using Native OCC algorithm."""
import Part
import DraftGeomUtils
from PathScripts.PathUtils import fmt, helicalPlunge, rampPlunge, depth_params
FreeCAD.Console.PrintMessage(translate("PathPocket", "Generating toolpath with OCC native offsets.\n"))
extraoffset = obj.MaterialAllowance.Value
# Build up the offset loops
output = ""
if obj.Comment != "":
output += '(' + str(obj.Comment)+')\n'
output += 'G0 Z' + fmt(obj.ClearanceHeight.Value) + "F " + PathUtils.fmt(self.vertRapid) + "\n"
offsets = []
nextradius = self.radius + extraoffset
result = DraftGeomUtils.pocket2d(shape, nextradius)
while result:
offsets.extend(result)
nextradius += (self.radius * 2) * (float(obj.StepOver)/100)
result = DraftGeomUtils.pocket2d(shape, nextradius)
# revert the list so we start with the outer wires
if obj.StartAt != 'Edge':
offsets.reverse()
plungePos = None
rampEdge = None
if obj.UseEntry:
# Try to find an entry location
toold = self.radius*2
helixBounds = DraftGeomUtils.pocket2d(shape, self.radius * (1 + obj.HelixSize))
if helixBounds:
rampD = obj.RampSize
if obj.StartAt == 'Edge':
plungePos = helixBounds[0].Edges[0].Vertexes[0].Point
else:
plungePos = offsets[0].Edges[0].Vertexes[0].Point
# If it turns out this is invalid for some reason, nuke plungePos
[perp, idx] = DraftGeomUtils.findPerpendicular(plungePos, shape.Edges)
if not perp or perp.Length < self.radius * (1 + obj.HelixSize):
plungePos = None
FreeCAD.Console.PrintError(translate("PathPocket", "Helical Entry location not found.\n"))
# FIXME: Really need to do a point-in-polygon operation to make sure this is within helixBounds
# Or some math to prove that it has to be (doubt that's true)
# Maybe reverse helixBounds and pick off that?
if plungePos is None: # If we didn't find a place to helix, how about a ramp?
FreeCAD.Console.PrintMessage(translate("PathPocket", "Attempting ramp entry.\n"))
if (offsets[0].Edges[0].Length >= toold * rampD) and not (isinstance(offsets[0].Edges[0].Curve, Part.Circle)):
rampEdge = offsets[0].Edges[0]
# The last edge also connects with the starting location- try that
elif (offsets[0].Edges[-1].Length >= toold * rampD) and not (isinstance(offsets[0].Edges[-1].Curve, Part.Circle)):
rampEdge = offsets[0].Edges[-1]
else:
FreeCAD.Console.PrintError(translate("PathPocket", "Ramp Entry location not found.\n"))
# print "Neither edge works: " + str(offsets[0].Edges[0]) + ", " + str(offsets[0].Edges[-1])
# FIXME: There's got to be a smarter way to find a place to ramp
# For helix-ing/ramping, know where we were last time
# FIXME: Can probably get this from the "machine"?
lastZ = obj.ClearanceHeight.Value
startPoint = None
depthparams = depth_params(
obj.ClearanceHeight.Value,
obj.SafeHeight.Value,
obj.StartDepth.Value,
obj.StepDown,
obj.FinishDepth.Value,
obj.FinalDepth.Value)
for vpos in depthparams.get_depths():
first = True
# loop over successive wires
for currentWire in offsets:
last = None
for edge in currentWire.Edges:
if not last:
# we set the base GO to our fast move to our starting pos
if first:
# If we can helix, do so
if plungePos:
output += helicalPlunge(plungePos, obj.RampAngle, vpos, lastZ, self.radius*2, obj.HelixSize, self.horizFeed)
lastZ = vpos
# Otherwise, see if we can ramp
# FIXME: This could be a LOT smarter (eg, searching for a longer leg of the edge to ramp along)
elif rampEdge:
output += rampPlunge(rampEdge, obj.RampAngle, vpos, lastZ)
lastZ = vpos
# Otherwise, straight plunge... Don't want to, but sometimes you might not have a choice.
# FIXME: At least not with the lazy ramp programming above...
else:
print "WARNING: Straight-plunging... probably not good, but we didn't find a place to helix or ramp"
startPoint = edge.Vertexes[0].Point
output += "G0 Z" + fmt(obj.ClearanceHeight.Value) + "F " + PathUtils.fmt(self.vertRapid) + "\n"
output += "G0 X" + fmt(startPoint.x) + " Y" + fmt(startPoint.y) +\
" Z" + fmt(obj.ClearanceHeight.Value) + "F " + PathUtils.fmt(self.horizRapid) + "\n"
first = False
# then move slow down to our starting point for our profile
last = edge.Vertexes[0].Point
output += "G1 X" + fmt(last.x) + " Y" + fmt(last.y) + " Z" + fmt(vpos) + " F" + fmt(self.vertFeed) + "\n"
if DraftGeomUtils.geomType(edge) == "Circle":
point = edge.Vertexes[-1].Point
if point == last: # edges can come flipped
point = edge.Vertexes[0].Point
center = edge.Curve.Center
relcenter = center.sub(last)
v1 = last.sub(center)
v2 = point.sub(center)
if v1.cross(v2).z < 0:
output += "G2"
else:
output += "G3"
output += " X" + fmt(point.x) + " Y" + fmt(point.y) + " Z" + fmt(vpos)
output += " I" + fmt(relcenter.x) + " J" + fmt(relcenter.y) + " K" + fmt(relcenter.z) + " F" + fmt(self.horizFeed)
output += "\n"
last = point
else:
point = edge.Vertexes[-1].Point
if point == last: # edges can come flipped
point = edge.Vertexes[0].Point
output += "G1 X" + fmt(point.x) + " Y" + fmt(point.y) + " Z" + fmt(vpos) + " F" + fmt(self.horizFeed) + "\n"
last = point
# move back up
output += "G0 Z" + fmt(obj.ClearanceHeight.Value) + "F " + PathUtils.fmt(self.vertRapid) + "\n"
return output