For those times your dimension string text flips upside down, here's a little script to reverse the

theoryshaw · April 10

For those times your dimension string text flips upside down, here's a little script to reverse the vertices of the dimension, so the text reads correctly again.

import bpy
import bmesh

obj = bpy.context.edit_object
bm = bmesh.from_edit_mesh(obj.data)

# Find the selected edge loop
edges = [e for e in bm.edges if e.select]
verts = []
if edges:
    edge = edges[0]
    v1, v2 = edge.verts
    visited = {v1}
    verts.append(v1)
    current = v1

    while True:
        link_edges = [e for e in current.link_edges if e in edges]
        next_vert = None
        for e in link_edges:
            other = e.other_vert(current)
            if other not in visited:
                next_vert = other
                break
        if not next_vert:
            break
        visited.add(next_vert)
        verts.append(next_vert)
        current = next_vert

    # Reverse the order by duplicating vertices and reassigning edges
    for i in range(len(verts)//2):
        verts[i].co, verts[-1-i].co = verts[-1-i].co.copy(), verts[i].co.copy()

bmesh.update_edit_mesh(obj.data)

theoryshaw · April 10

Made it a small plugin. AI was involved. :)

bl_info = {
    "name": "Reverse Polyline Vertices",
    "author": "ChatGPT + Ryan",
    "version": (1, 0),
    "blender": (2, 80, 0),
    "location": "Mesh > Vertices > Reverse Polyline Vertices",
    "description": "Reverses the vertex order along a selected polyline in edit mode",
    "category": "Mesh",
}

import bpy
import bmesh

class MESH_OT_reverse_polyline_vertices(bpy.types.Operator):
    """Reverse the vertex positions of a selected polyline"""
    bl_idname = "mesh.reverse_polyline_vertices"
    bl_label = "Reverse Polyline Vertices"
    bl_options = {'REGISTER', 'UNDO'}

    @classmethod
    def poll(cls, context):
        return (context.active_object is not None and
                context.active_object.type == 'MESH' and
                context.mode == 'EDIT_MESH')

    def execute(self, context):
        obj = context.edit_object
        bm = bmesh.from_edit_mesh(obj.data)

        edges = [e for e in bm.edges if e.select]
        if not edges:
            self.report({'WARNING'}, "No selected edges found")
            return {'CANCELLED'}

        verts = []
        edge = edges[0]
        v1, v2 = edge.verts
        visited = {v1}
        verts.append(v1)
        current = v1

        while True:
            link_edges = [e for e in current.link_edges if e in edges]
            next_vert = None
            for e in link_edges:
                other = e.other_vert(current)
                if other not in visited:
                    next_vert = other
                    break
            if not next_vert:
                break
            visited.add(next_vert)
            verts.append(next_vert)
            current = next_vert

        if len(verts) < 2:
            self.report({'WARNING'}, "Not enough vertices to reverse")
            return {'CANCELLED'}

        for i in range(len(verts)//2):
            verts[i].co, verts[-1-i].co = verts[-1-i].co.copy(), verts[i].co.copy()

        bmesh.update_edit_mesh(obj.data)
        self.report({'INFO'}, "Polyline vertex order reversed")
        return {'FINISHED'}

def menu_func(self, context):
    self.layout.operator(MESH_OT_reverse_polyline_vertices.bl_idname)

def register():
    bpy.utils.register_class(MESH_OT_reverse_polyline_vertices)
    bpy.types.VIEW3D_MT_edit_mesh_vertices.append(menu_func)

def unregister():
    bpy.types.VIEW3D_MT_edit_mesh_vertices.remove(menu_func)
    bpy.utils.unregister_class(MESH_OT_reverse_polyline_vertices)

if __name__ == "__main__":
    register()