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render3d: terrain_baked_at - a map's terrain and sun shadow taken from its bakes at start and on a swap

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The game names the tiles' and the shadow's bake files (key, version) before the map is made; r3d_init's
terrain step and terrain_reload then open them with terrain_from_baked / terrain_shadow_from_bytes and
generate nothing, and fall back to the survey (saying so once) when a bake is missing or stale. Without
the call nothing changes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-29 17:42:16 +03:00
parent f02eab5c51
commit 06d828a296
5 changed files with 53 additions and 2 deletions
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10
packages/ludic.render3d/terrain.ludic
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@ -413,7 +413,7 @@ const TERRAIN_INIT_STEPS: int = 4
function terrain_init_step(render3d_st: mut Render3dState, i: int) -> void {
if i == 0 { if not render3d_st.tt_baked { terrain_generate(render3d_st) }; return }
# a baked terrain whose shadow came from its own bake (terrain_shadow_from_bytes) keeps it
if i == 1 { if not (render3d_st.tt_baked and render3d_st.ter_shadow_tex != 0) { terrain_bake_shadow(render3d_st) }; return }
if i == 1 { if not (render3d_st.tt_baked and render3d_st.tb_shadow_ok) { terrain_bake_shadow(render3d_st) }; return }
if i == 2 { terrain_load_textures(render3d_st); return }
terrain_init_finish(render3d_st)
}
@ -850,6 +850,14 @@ function terrain_reload(render3d_st: mut Render3dState, dem: string, emin: float
terrain_unload(render3d_st)
render3d_st.TERRAIN_HALF = half
render3d_st.ter_ox = ox; render3d_st.ter_oz = oz
render3d_st.r3d_dem_ox = ox; render3d_st.r3d_dem_oz = oz
# a swap to a map that has its bake: the tiles and the shadow read, the bounds from the tiles
if terrain_baked_try(render3d_st) {
if not render3d_st.tb_shadow_ok { terrain_bake_shadow(render3d_st) }
cdlod_bounds(render3d_st)
gpu_check(render3d_st, "terrain reload")
return
}
if len(dem) > 0 { terrain_use_dem(render3d_st, dem, emin, emax, base, ox, oz) }
if len(ortho) > 0 { terrain_use_ortho(render3d_st, ortho) }
terrain_generate(render3d_st)