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# SPDX-License-Identifier: GPL-2.0-or-later
# <pep8 compliant>
import bpy
import bmesh
from mathutils.geometry import intersect_line_plane
def failure_message(self):
self.report({"WARNING"}, 'select 1 face and 1 detached edge')
def failure_message_on_plane(self):
msg2 = """\
Edge2Face expects the edge to intersect at one point on the plane of the selected face. You're
seeing this warning because mathutils.geometry.intersect_line_plane is being called on an edge/face
combination that has no clear intersection point ( both points of the edge either touch the same
plane as the face or they lie in a plane that is offset along the face's normal )"""
lines = msg2.split('\n')
for line in lines:
self.report({'INFO'}, line)
self.report({"WARNING"}, 'No intersection found, see the info panel for details')
def extend_vertex(self):
obj = bpy.context.edit_object
me = obj.data
bm = bmesh.from_edit_mesh(me)
verts = bm.verts
faces = bm.faces
planes = [f for f in faces if f.select]
if not (len(planes) == 1):
failure_message(self)
return
plane = planes[0]
plane_vert_indices = [v for v in plane.verts[:]]
all_selected_vert_indices = [v for v in verts if v.select]
M = set(plane_vert_indices)
N = set(all_selected_vert_indices)
O = N.difference(M)
O = list(O)
if not len(O) == 2:
failure_message(self)
return
(v1_ref, v1), (v2_ref, v2) = [(i, i.co) for i in O]
plane_co = plane.calc_center_median()
plane_no = plane.normal
new_co = intersect_line_plane(v1, v2, plane_co, plane_no, False)
if new_co:
new_vertex = verts.new(new_co)
A_len = (v1 - new_co).length
B_len = (v2 - new_co).length
vertex_reference = v1_ref if (A_len < B_len) else v2_ref
bm.edges.new([vertex_reference, new_vertex])
bmesh.update_edit_mesh(me, loop_triangles=True)
else:
failure_message_on_plane(self)
class TCEdgeToFace(bpy.types.Operator):
'''Extend selected edge towards projected intersection with a selected face'''
bl_idname = 'tinycad.edge_to_face'
bl_label = 'E2F edge to face'
bl_options = {'REGISTER', 'UNDO'}
@classmethod
def poll(cls, context):
ob = context.object
return all([bool(ob), ob.type == 'MESH', ob.mode == 'EDIT'])
def execute(self, context):
extend_vertex(self)
return {'FINISHED'}
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