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Draft: improve handling of Part::Vertex when used with PointArray

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The `Part::Vertex` object has both `Placement`, and `X`, `Y`, `Z`
properties. The net displacement is the sum of both of these two
properties.

Previously, the `PointArray` would only use the `Placement`
which would produce a seemingly erroneous result
because `X`, `Y`, and `Z` would be ignored.
This commit is contained in:
vocx-fc
2020-06-04 14:55:51 -05:00
committed by Yorik van Havre
parent 565f2b35b4
commit c700dc5d05
1 changed files with 50 additions and 10 deletions
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60
src/Mod/Draft/draftobjects/pointarray.py
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@@ -22,7 +22,17 @@
# * USA *
# * *
# ***************************************************************************
"""Provides the object code for the Draft PointArray object."""
"""Provides the object code for the Draft PointArray object.
To Do
-----
This object currently uses the points inside a `Draft Block`,
a `Part::Compound`, or a `Sketch`. To make this more general,
this object could be augmented to extract a list of points
from the vertices of any object with a `Part::TopoShape` (2D or 3D).
See the `get_point_list` function for more information.
"""
## @package pointarray
# \ingroup DRAFT
# \brief Provides the object code for the Draft PointArray object.
@@ -147,12 +157,32 @@ class PointArray(DraftObject):
def get_point_list(point_object):
"""Extract a list of points from a point object.
Parameters
----------
point_object: Part::Feature
Either a `Draft Block`, a `Part::Compound`,
or a `Sketcher::SketchObject` containing points.
Returns
-------
list, int
A list of points that have `X`, `Y`, `Z` coordinates;
the second element is the number of elements.
If the list is empty, the second element is zero.
To Do
-----
- This function currently extracts the points inside a `Draft Block`,
a `Part::Compound`, or a `Sketch`. To make this more general,
this function could be augmented to extract a list of points
from the vertices of any object with a `Part::TopoShape` (2D or 3D).
- If the input is a `Part::Compound`, it should handle all valid types
of objects simultaneously, that is, `Draft Points`, `Part::Vertexes`,
`Sketches` with points, and possibly any other object with
a `Part::TopoShape` as in the previous point.
It should recursively call itself to extract
points contained in nested compounds.
"""
# If its a clone, extract the real object
while utils.get_type(point_object) == 'Clone':
@@ -216,18 +246,23 @@ def build_copies(base_object, pt_list=None, placement=App.Placement()):
new_shape = base_object.Shape.copy()
original_rotation = new_shape.Placement.Rotation
# Reset placement of the copy, and combine the original rotation
# with the provided placement. Two rotations (quaternions)
# Reset the position of the copy, and combine the original rotation
# with the provided rotation. Two rotations (quaternions)
# are combined by multiplying them.
new_shape.Placement.Base = placement.Base
new_shape.Placement.Rotation = original_rotation * placement.Rotation
# If the point object has a placement, use it
# to displace the copy of the shape. Otherwise
# translate by the X, Y, Z coordinates.
if hasattr(point, 'Placement'):
place = point.Placement
new_shape.translate(place.Base)
if point.TypeId == "Part::Vertex":
# For this object the final position is the value of the Placement
# plus the value of the X, Y, Z properties
place = App.Vector(point.X,
point.Y,
point.Z) + point.Placement.Base
elif hasattr(point, 'Placement'):
# If the point object has a placement (Draft Point), use it
# to displace the copy of the shape
place = point.Placement.Base
# The following old code doesn't make much sense because it uses
# the rotation value of the auxiliary point.
@@ -237,11 +272,16 @@ def build_copies(base_object, pt_list=None, placement=App.Placement()):
# which will probably be zero anyway.
# Old code:
# place = point.Placement
# new_shape.rotate(place.Base,
# place.Rotation.Axis,
# math.degrees(place.Rotation.Angle))
else:
new_shape.translate(App.Vector(point.X, point.Y, point.Z))
# In other cases (Sketch with points)
# translate by the X, Y, Z coordinates
place = App.Vector(point.X, point.Y, point.Z)
new_shape.translate(place)
copies.append(new_shape)