Ryan Schultz
74caa7d1da
Implements selection tool that identifies mesh objects where ALL edges are oriented at specific angles (40-60° or 120-140°) relative to the X axis. Designed for filtering diagonal line segments at approximately ±45 degrees, particularly useful for processing imported SVG paths or similar geometric data.
78 lines
No EOL
2.3 KiB
Python
78 lines
No EOL
2.3 KiB
Python
import bpy
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import bmesh
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import math
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from mathutils import Vector
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def all_edges_in_angle_range(obj, ranges=[(40, 60), (120, 140)]):
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"""
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Check if ALL edges in a mesh object have angles to the X axis
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within any of the specified ranges.
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Returns True only if ALL edges satisfy the condition.
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"""
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bm = bmesh.new()
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bm.from_mesh(obj.data)
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bm.edges.ensure_lookup_table()
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if len(bm.edges) == 0:
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bm.free()
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return False
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x_axis = Vector((1, 0, 0))
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for edge in bm.edges:
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v1, v2 = edge.verts
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# Get world space coordinates
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v1_world = obj.matrix_world @ v1.co
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v2_world = obj.matrix_world @ v2.co
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# Calculate direction vector
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direction = v2_world - v1_world
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if direction.length > 0:
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direction.normalize()
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# Calculate angle from X axis
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angle_rad = direction.angle(x_axis)
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angle_deg = math.degrees(angle_rad)
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# Check if this edge is in any of the valid ranges
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edge_in_range = False
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for min_angle, max_angle in ranges:
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if min_angle <= angle_deg <= max_angle:
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edge_in_range = True
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break
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# If this edge is NOT in any range, return False immediately
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if not edge_in_range:
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bm.free()
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return False
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# If we got here, all edges are in valid ranges
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bm.free()
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return True
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def select_edges_by_angle():
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"""
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Select all mesh objects where ALL edges are angled 40-60° or 120-140° from X axis.
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"""
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# Deselect all objects first
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bpy.ops.object.select_all(action='DESELECT')
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selected_count = 0
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# Check for both +45° (40-60°) and -45° (120-140°) ranges
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angle_ranges = [(40, 60), (120, 140)]
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# Iterate through all objects in the scene
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for obj in bpy.context.scene.objects:
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if obj.type == 'MESH':
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if all_edges_in_angle_range(obj, ranges=angle_ranges):
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obj.select_set(True)
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selected_count += 1
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print(f"Selected: {obj.name}")
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print(f"\nTotal objects selected: {selected_count}")
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# Run the script
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select_edges_by_angle() |