Another attempt to create a t-post bracket using a script. This creates a 2D rectangle, bends it, and then solidifies it into a 3d object. <\/p>\n\n\n
\nimport bpy\nimport bmesh\nimport math\nfrom mathutils import Vector, Matrix\n\n# -----------------------------\n# Reset \/ clear scene\n# -----------------------------\nfor obj in list(bpy.data.objects):\n bpy.data.objects.remove(obj, do_unlink=True)\n\n# -----------------------------\n# Scene units: mm (1 BU = 1 mm)\n# -----------------------------\nscene = bpy.context.scene\nscene.unit_settings.system = 'METRIC'\nscene.unit_settings.scale_length = 0.001\n\nINCH_TO_MM = 25.4\ndef inch(x): # returns mm (Blender units)\n return x * INCH_TO_MM\n\n# -----------------------------\n# Parameters\n# -----------------------------\nsize_x_in = 3.0\nsize_y_in = 7.0\nthickness_in = 0.25 # SOLIDIFY thickness\n\nfold1_offset_in = 0.5 # from MIN-Y end\nfold2_offset_in = 2.0 # from MIN-Y end\n\nfold1_rad = math.radians(-80.0)\nfold2_rad = math.radians(80.0)\n\nsubdivide_cuts = 60\nEPS_Y = 1e-5 # mm tolerance for "on the fold line"\n\n# -----------------------------\n# Create flat sheet (plane)\n# -----------------------------\nbpy.ops.mesh.primitive_plane_add(size=1.0, location=(0.0, 0.0, 0.0))\nobj = bpy.context.active_object\nobj.name = "Bracket"\nobj.dimensions = (inch(size_x_in), inch(size_y_in), 0.0)\nbpy.ops.object.transform_apply(location=False, rotation=False, scale=True)\n\n# Subdivide for clean fold lines\nbpy.ops.object.mode_set(mode='EDIT')\nbpy.ops.mesh.select_all(action='SELECT')\nbpy.ops.mesh.subdivide(number_cuts=subdivide_cuts)\nbpy.ops.object.mode_set(mode='OBJECT')\n\n# Compute fold Y positions\nhalf_y = inch(size_y_in) \/ 2.0\nmin_y = -half_y\ny_fold1 = min_y + inch(fold1_offset_in)\ny_fold2 = min_y + inch(fold2_offset_in)\n\n# Add both fold lines\nbm = bmesh.new()\nbm.from_mesh(obj.data)\n\nfor y_fold in (y_fold1, y_fold2):\n geom = bm.verts[:] + bm.edges[:] + bm.faces[:]\n bmesh.ops.bisect_plane(\n bm,\n geom=geom,\n plane_co=Vector((0.0, y_fold, 0.0)),\n plane_no=Vector((0.0, 1.0, 0.0)),\n clear_inner=False,\n clear_outer=False\n )\n\nbm.normal_update()\nbm.to_mesh(obj.data)\nbm.free()\n\n# -----------------------------\n# Re-open bmesh, store ORIGINAL Y per vertex\n# -----------------------------\nbm = bmesh.new()\nbm.from_mesh(obj.data)\nbm.verts.ensure_lookup_table()\n\norig_y_layer = bm.verts.layers.float.new("orig_y")\nfor v in bm.verts:\n v[orig_y_layer] = v.co.y\n\n# ============================================================\n# FOLD 1\n# ============================================================\nhinge_verts_1 = [v for v in bm.verts if abs(v[orig_y_layer] - y_fold1) < EPS_Y]\nif not hinge_verts_1:\n raise RuntimeError("No hinge vertices found for fold 1. Increase subdivide_cuts or EPS_Y.")\n\nhinge_point_1 = Vector((0.0, 0.0, 0.0))\nfor v in hinge_verts_1:\n hinge_point_1 += v.co\nhinge_point_1 \/= len(hinge_verts_1)\n\nverts_to_rotate_1 = [v for v in bm.verts if v[orig_y_layer] > (y_fold1 + EPS_Y)]\nrot1 = Matrix.Rotation(fold1_rad, 4, 'X')\nbmesh.ops.rotate(bm, verts=verts_to_rotate_1, cent=hinge_point_1, matrix=rot1)\n\n# ============================================================\n# FOLD 2\n# ============================================================\nhinge_verts_2 = [v for v in bm.verts if abs(v[orig_y_layer] - y_fold2) < EPS_Y]\nif not hinge_verts_2:\n raise RuntimeError("No hinge vertices found for fold 2. Increase subdivide_cuts or EPS_Y.")\n\nhinge_point_2 = Vector((0.0, 0.0, 0.0))\nfor v in hinge_verts_2:\n hinge_point_2 += v.co\nhinge_point_2 \/= len(hinge_verts_2)\n\nverts_to_rotate_2 = [v for v in bm.verts if v[orig_y_layer] > (y_fold2 + EPS_Y)]\nrot2 = Matrix.Rotation(fold2_rad, 4, 'X')\nbmesh.ops.rotate(bm, verts=verts_to_rotate_2, cent=hinge_point_2, matrix=rot2)\n\n# Write back mesh\nbm.normal_update()\nbm.to_mesh(obj.data)\nbm.free()\n\n# -----------------------------\n# Solidify AFTER folding\n# -----------------------------\nsolid = obj.modifiers.new(name="Solidify_0p5in", type='SOLIDIFY')\nsolid.thickness = inch(thickness_in) # 0.5"\nsolid.offset = 0.0 # centered thickness (equal on both sides)\nsolid.use_even_offset = True\nsolid.use_rim = True\n\n# Optional: keep object active\nbpy.ops.object.select_all(action='DESELECT')\nobj.select_set(True)\nbpy.context.view_layer.objects.active = obj\n<\/pre><\/div>","protected":false},"excerpt":{"rendered":"Another attempt to create a t-post bracket using a script. This creates a 2D rectangle, bends it, and then solidifies it into a 3d object.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2163,1945],"tags":[2158,2182,664],"class_list":["post-12106","post","type-post","status-publish","format-standard","hentry","category-blender-3d-printing","category-python","tag-blender","tag-blender-api","tag-python"],"_links":{"self":[{"href":"https:\/\/www.rushworth.us\/lisa\/index.php?rest_route=\/wp\/v2\/posts\/12106","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rushworth.us\/lisa\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rushworth.us\/lisa\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rushworth.us\/lisa\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rushworth.us\/lisa\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12106"}],"version-history":[{"count":2,"href":"https:\/\/www.rushworth.us\/lisa\/index.php?rest_route=\/wp\/v2\/posts\/12106\/revisions"}],"predecessor-version":[{"id":12108,"href":"https:\/\/www.rushworth.us\/lisa\/index.php?rest_route=\/wp\/v2\/posts\/12106\/revisions\/12108"}],"wp:attachment":[{"href":"https:\/\/www.rushworth.us\/lisa\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rushworth.us\/lisa\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rushworth.us\/lisa\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}