Get the current scene: objects (name/kind/layer/bbox), layers, selection, bounds, and display mode.

Capture the current 3D viewport so you can see the model. Returns a PNG image. Use after making changes to check the result.

Create a NURBS curve from 3D points [[x,y,z], ...].

kind: 'interp' (curve passes through the points), 'control' (points are control vertices), 'polyline' (straight segments), 'line' (two points).

Create a surface/solid from existing curves (referenced by name).

operation: 'extrude' params: direction [x,y,z] (default [0,0,1]), distance (default 10), cap (bool, default true - closed profiles become solids) 'revolve' params: axis_point, axis_dir, angle (degrees, default 360) 'loft' curves: 2+ profiles in order; params: ruled (bool) 'planar' flat surface from one closed planar curve 'sweep' curves: [profile, rail]

Boolean operation between solids: 'union', 'difference' (targets minus tools), or 'intersection'. Tools are consumed.

Transform objects (by name).

operation/params: 'move' offset [dx,dy,dz] 'copy' offset [dx,dy,dz] 'rotate' center [x,y,z], axis [x,y,z] (default Z), angle degrees 'scale' center, factor (uniform) or factors [sx,sy,sz] 'mirror' plane_point, plane_normal, keep_original (bool)

Select objects by names, kind (curve/surface/solid), or layer name. mode: 'replace', 'add', or 'clear' (clear ignores other args).

Run any Serpentine3D command exactly as if typed in the command line, supplying its interactive inputs in order.

Examples: command='circle', inputs=['0,0,0', '5'] command='extrude', inputs=['Curve 01', '', '20', 'Yes'] (object name(s), then '' to end selection, then distance, then cap) command='zoomextents'

Selection prompts accept object names, 'all', or '' to finish.

Manage layers. action: 'list', 'create', 'rename', 'visible', 'current', 'color' (color as [r,g,b] 0-1), 'assign' (move objects to layer), 'delete'.

Import a file into the scene (.serp, .step/.stp, .obj).

Export the scene (or current selection) to .serp, .step/.stp or .obj — format chosen by extension.

Measure geometry. what: 'distance' (needs points=[[..],[..]]), 'length', 'area', 'volume', 'bbox', 'centroid' (need targets).

Undo the last operation (or redo with redo=true).

Adjust the viewport. view: top/front/right/left/back/bottom/ isometric/perspective. display_mode: wireframe/shaded/ghosted. zoom_extents fits all objects in view.