lesson 002 · foundations

every edit is a proposal

Beginner·17 min

GizmoOutlinerInspector

Lesson video · 17 min

Direct manipulation, plus the idea that backs it. You translate, rotate, scale, and multi-select with the gizmo and inspector, then learn each edit is a proposal passing through the same gate the agent uses — fully undoable and replayable.

Chapters

00:00one API for everythingtoolbar, gizmo, and agent all dispatch the same proposals
01:50translate along an axismove a node with handles, planes, and the screen-space center
03:40rotate and scaleswitch gizmo modes, read the angle, constrain proportions
05:30pivot, snapping, multi-selectlocal vs world pivot, grid and angle snap, shared-pivot transforms
07:30typing exact valuesset position and rotation numerically in the inspector
09:20the proposal gatethe single checkpoint every edit passes before touching the core
11:10read the diffinspect exactly which fields a proposal changes
13:00undo, redo, replaystep the history and re-run a proposal stream on a fresh scene
15:00why this mattersthe property that lets humans and agents share one history

More in foundations

lesson 001 · foundationsthe canvas and the core

A guided first session that builds a small scene from nothing and proves the central idea: scene-core is the source of truth and the renderer is just an adapter. You leave understanding the viewport, the editing loop, and where the scene actually lives.

Beginner · 15 min · Outliner, Gizmo, Inspector