Command catalogue

Every edit the GUI, a script or a future API makes goes through pframe.commands.apply(project, {"op": ...}); the undo stack snapshots the project around each call. This is the list of operations with their undo text and what they do.

Operation	Undo text	What it does
`add_node`	Add joint
`move_node`	Move joint 7
`set_node`	Edit joint 7
`delete_nodes`	Delete 2 joints
`add_member`	Add member
`set_member`	Edit member 7
`delete_members`	Delete 2 members
`set_support`	Support at joint 3
`transform`	Move 2 joints	Move / rotate / scale / mirror the given joints in place (members follow).
`clone`	Clone (move)	Clone joints and members (with supports and optionally loads) through a linear / radial / mirror array.
`merge_members`	Continuous member	Continuous Member tool: a straight chain of analysis members becomes one physical member.
`split_at_joints`	Split 2 members at joints	Convert physical members to analysis members: split the given members at the joints lying along them.
`split_member`	Split member 7	Split one member at a point on it (a joint is added there, or an existing one reused); the other joints
`set_design`	Design parameters (1 members)	Per-member design parameters (Lb [m], Kx, Ky, Cb, Fy [ksi]); None removes a key.
`set_design_group`	Design group Roof	Create or update a design group: members (one group per member), parameters, candidate shape types.
`assign_group_section`	Assign W12X26 to group
`delete_design_groups`	Delete 2 design groups
`add_layer`	Add layer Roof
`set_layer`	Edit layer 7
`delete_layers`	Delete 2 layers
`auto_layers`	Layers by story
`auto_generate_groups`	Auto generate groups	S-FRAME Auto Generate Groups: the Attributes folder is rebuilt with one sub-folder per section, material,
`add_constraint`	Add move
`delete_constraints`	Delete 2 constraints
`add_link`	Add elastic link
`set_link`	Edit link 7
`delete_links`	Delete 2 links
`add_nodal_load`	Joint load at 3
`add_member_dist_load`	Member load on 7
`add_member_point_load`	Point load on 7
`add_settlement`	Settlement at joint 3
`set_load`	set_load	Edit one load in place: kind nodal \| member_dist \| member_point, index into that list, fields to change.
`delete_loads`	Delete loads	Remove loads matching every given key among case / node / member.
`add_material`	Add material
`set_material`	Edit material
`add_section`	Add section
`set_section`	Edit section
`add_load_case`	Add load case Roof
`set_load_case`	Edit load case Roof
`delete_load_case`	Delete load case Roof
`clone_load_case`	Clone load case Roof
`generate_combinations`	Generate LRFD combinations	LRFD combinations from the case types; every case of a type gets the factor; existing same-named combos are replaced.
`set_combination`	Combination Roof
`delete_combination`	Delete combination Roof
`set_settings`	Settings
`set_grids`	Grids and levels
`move_grid_line`	Move grid line B	Graphical grid edits (S3c.3): move / shift_all / copy / delete a line of one grid; joints on the moved
`move_grid`	Move grid None	Grid origin / rotation change; joints inside the grid's footprint follow when the grid locks joints