77 lines
2.0 KiB
Python
77 lines
2.0 KiB
Python
# SPDX-License-Identifier: GPL-2.0-or-later
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import bpy
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import bmesh
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from . import cad_module as cm
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def add_line_to_bisection(self):
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obj = bpy.context.object
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me = obj.data
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bm = bmesh.from_edit_mesh(me)
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bm.verts.ensure_lookup_table()
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bm.edges.ensure_lookup_table()
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edges = [e for e in bm.edges if e.select and not e.hide]
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if not len(edges) == 2:
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msg = "select two coplanar non parallel edges"
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self.report({"WARNING"}, msg)
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return
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[[v1, v2], [v3, v4]] = [[v.co for v in e.verts] for e in edges]
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print('vectors found:\n', v1, '\n', v2, '\n', v3, '\n', v4)
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dist1 = (v1 - v2).length
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dist2 = (v3 - v4).length
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bdist = min([dist1, dist2])
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edge1 = (v1, v2)
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edge2 = (v3, v4)
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if not cm.test_coplanar(edge1, edge2):
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msg = "edges must be coplanar non parallel edges"
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self.report({"WARNING"}, msg)
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return
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# get pt and pick fartest vertex from (projected) intersections
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pt = cm.get_intersection(edge1, edge2)
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far1 = v2 if (v1 - pt).length < (v2 - pt).length else v1
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far2 = v4 if (v3 - pt).length < (v4 - pt).length else v3
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# print('intersection: ', pt)
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dex1 = far1 - pt
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dex2 = far2 - pt
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dex1 = dex1 * (bdist / dex1.length)
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dex2 = dex2 * (bdist / dex2.length)
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pt2 = pt + (dex1).lerp(dex2, 0.5)
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# print('bisector point:', pt2)
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pt3 = pt2.lerp(pt, 2.0)
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vec1 = bm.verts.new(pt2)
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vec2 = bm.verts.new(pt)
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vec3 = bm.verts.new(pt3)
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bm.edges.new((vec1, vec2))
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bm.edges.new((vec2, vec3))
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bmesh.update_edit_mesh(me)
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# print("done")
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class TCLineOnBisection(bpy.types.Operator):
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'''Generate the bisector of two selected edges'''
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bl_idname = 'tinycad.linetobisect'
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bl_label = 'BIX line to bisector'
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bl_options = {'REGISTER', 'UNDO'}
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@classmethod
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def poll(cls, context):
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obj = context.active_object
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return all([obj is not None, obj.type == 'MESH', obj.mode == 'EDIT'])
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def execute(self, context):
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add_line_to_bisection(self)
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return {'FINISHED'}
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