awesome-copilot/skills/rhino3d-scripts/references/macros-and-loading.md

Macros, Loading, and Running Scripts

Command Macros (no script needed)

A macro is a string of command-line input. Anywhere Rhino accepts a command (alias, toolbar button, _ReadCommandFile), you can place a macro.

Syntax rules

Token	Meaning
!	Cancel any currently running command before this one starts. Always start macros with !.
_	Use the English (invariant) command name, so the macro works in any locale.
-	Run the command in script mode — suppress dialogs, accept input from the macro string.
_Enter	Press Enter at the current prompt.
Pause	Stop and wait for the user to supply this input interactively.
;	Comment to end of line.
Newline	Same as a space — a separator between tokens, not a command terminator.

Example macros

! _-Line 0,0,0 10,0,0
! _-Circle 0,0,0 5 _Enter
! _SelAll _Delete
! _-Properties _Object _Name "MyObject" _EnterEnd _Enter
! _-RunPythonScript "MyScript.py"

Running Saved Scripts

Python (.py)

_-RunPythonScript "C:\Users\example\Scripts\MyScript.py"

Or, with the script folder on the search path:

_-RunPythonScript "MyScript.py"

_EditPythonScript opens the legacy editor; _ScriptEditor (Rhino 8) opens the unified editor with Python 3, VB, and C#.

RhinoScript (.rvb, .vbs)

Two steps: load the file (registers its subs/functions), then run a named sub.

_-LoadScript "MyScript.rvb"
_-RunScript MyMainSub

A single .rvb can hold many subs; _RunScript chooses which to invoke.

Search Paths

Options → Files → Search paths — folders listed here are scanned when you reference a script by bare filename. Without this, you must give a full path.

Startup Scripts

Options → RhinoScript → Startup (and Options → Python → Startup) — files in these lists run once when Rhino opens. Useful for registering custom commands or aliases.

Guard against missing document in startup code:

import scriptcontext as sc

def startup():
    if sc.doc is None:
        return

startup()

Toolbar Buttons & Aliases

A toolbar button’s Command field is just a macro. To make a button that runs your script:

! _-RunPythonScript "MyScript.py"

Set the Tooltip to a short description; set the icon via the button editor.

To create an alias: Options → Aliases → New. The alias name becomes a typed command; its value is the macro.

Invoking Macros From a Script

import rhinoscriptsyntax as rs
rs.Command("! _-Line 0,0,0 10,0,0", echo=False)

echo=False suppresses command-history output but does not suppress prompts — always use - and complete every prompt within the macro string.