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render3d: place_rec.ludic, the one encoder and decoder of a baked placement

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prec_put / prec_get / prec_size (Physics' spec): PREC_FULL, 12 bytes, for trees, boulders and stones
(u16 x, z in 1/65536 of the chunk; u16 y in cm above y_base; u8 scale over the kind's lo..hi, yaw, seed,
wind), and PREC_PACKED, 7 bytes, for the stream kinds (56 bits, least significant first: x 12, z 12,
y 12 in cm, scale 6, yaw 6, seed 4, wind 4). An encode takes the cell a value falls in, a decode its
centre, so a round trip is stable; a record is read from a []byte at an offset, never a pointer.
stream_emit_baked and layer_chunk_put take (recs, at, fmt) and decode through it; the earlier sb7_*
pair is gone.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-29 17:28:11 +03:00
parent 3f0bb07c16
commit 8589a5a7b4
6 changed files with 86 additions and 58 deletions
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packages/ludic.render3d/r3d.ludic
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@ -48,6 +48,7 @@ import "layer_chunks.ludic"
import "fog_impostors.ludic"
import "actor.ludic"
import "stream.ludic"
import "place_rec.ludic"
import "stream_baked.ludic"
import "fog_streams.ludic"
import "grass.ludic"