light-editor

lightEditor3d — the whole lamp, not just its curves. A Widget3d that edits what a light is (type, colour, intensity, range, shadows) alongside what it does over time (curveProgram3d), with a power switch so you can watch the attack and decay play out.

Demo

See curve-program, which uses this to drive a real lamp.

Why the two halves belong together

A program editor on its own is half a job: you can draw a beautiful strike-and- decay and have no way to say the lamp is a warm 40 W spot that casts shadows. Tonio, on the program editor by itself: "presumably we need to be able to configure the light's basic properties (like its basic color, intensity, whether it casts shadows, the type of light, and so on, or we've only done half the job."

So this is one field, for the same reason a program is one field: what you get back is a complete lamp description that can be handed straight to b3dPointLight / b3dSpotLight / b3dAreaLight.

Colour is HSV, not RGB

Two sliders — hue and saturation — and no value slider, because value is intensity and having both would give you two ways to dim a lamp that disagree.

RGB would need three sliders to express "the same colour, a bit warmer", which is the edit you actually make on a light. It also matches how the program's hue and saturation channels modulate it, so the static colour and the animated one are described in the same terms.

A power SWITCH, not a button

It is state — the lamp is on or it is off — and a button reads as "do something once". The first version of this was a button and Tonio did not recognise it as the switch it was.