raster.ts

Blame: the commit that last changed each line · file · history

`5a57ebae` 2026-09-07 Pavel Safronov	1	/**
	2	* Metadata for the rasters `npm run terrain` writes into static/.
	3	*
	4	* These must match the `render` block of content/geography.json — the generator
	5	* reads that file, the browser only ever sees the PNGs, and nothing in between
	6	* carries the numbers across. test/raster.test.ts asserts the two agree, because
	7	* a silent disagreement here would displace the terrain rather than break it, and
	8	* that failure mode has already cost this project once (D-024).
	9	*/
	10	export const RASTER_WIDTH = 2048
	11	export const RASTER_HEIGHT = 1192
	12	/**
	13	* The working range terrain-height.png is stretched across: black is the floor of
	14	* it, white the ceiling. It is deliberately not a round number and not anchored at
	15	* zero — it only has to cover the terrain that exists, and the tighter it is the
	16	* finer every step in it. Below zero is real: lake and sea floors are cut beneath
	17	* the datum, and the old fixed 0..5,000 m encoding clipped them flat.
	18	*/
`9a621732` 2026-09-08 Pavel Safronov	19	export const RASTER_MIN_HEIGHT_M = -560
`5a57ebae` 2026-09-07 Pavel Safronov	20	export const RASTER_MAX_HEIGHT_M = 4400
	21	export const RASTER_HEIGHT_SPAN_M = RASTER_MAX_HEIGHT_M - RASTER_MIN_HEIGHT_M
	22
	23	export const COLOR_RASTER = 'terrain-color.png'
	24	export const HEIGHT_RASTER = 'terrain-height.png'