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perf(render3d): the sky light baked once at start, the terrain load in four steps, actor cull bounds by height

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- sky_start_yaw: a game that turns the sky at boot sets it before r3d_init and the image-based light
  is baked once at that yaw; sky_set_yaw to a yaw already baked bakes nothing.
- terrain_init_step: the height field and normals, the sun shadow, the materials, the patches and
  programs as separate steps; r3d_load_count is 8, so a loading bar moves through the terrain (half
  the start-up) instead of jumping over it. terrain_init runs the four in a row as before.
- The per-cascade actor cull centres its sphere at half the model's height and sizes it by the
  larger of height and radius: centred at the radius, it dropped a head at a cascade's edge (11 px
  in town, found by the drawstats comparison). Lake was byte-identical before and after.

OpenGL frames at the five viewpoints unchanged; the game's 59 self-tests pass.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-15 15:03:06 +03:00
parent dcf6c55a4e
commit 00df8839e6
5 changed files with 52 additions and 16 deletions
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24
packages/ludic.render3d/render.ludic
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@ -93,24 +93,28 @@ function r3d_open(w: int, h: int, title: string) -> bool {
}
# The load, as steps a loading screen can show between: 0 the sky and its image-based light,
# 1 the terrain (height, normals, shadow, materials), 2 the shadow maps and the screen targets,
# 3 the scattered cover and the actors, 4 the grass and the sky pass. The order is r3d_init's.
function r3d_load_count() -> int { return 5 }
# 1 - 4 the terrain (the height field and normals, its sun shadow, its materials, its patches and
# programs), 5 the shadow maps and the screen targets, 6 the scattered cover and the actors, 7 the
# grass and the sky pass. The order is r3d_init's.
function r3d_load_count() -> int { return 4 + TERRAIN_INIT_STEPS }
function r3d_load_step(i: int) -> bool {
let t = i - 1
if i == 0 {
if not sky_load(r3d_assets + "/hdri/kloofendal_48d_partly_cloudy_puresky_4k.hdr") { return false }
daylight_init()
} else if i == 1 {
if r3d_dem_path != null { terrain_use_dem(r3d_dem_path, r3d_dem_min, r3d_dem_max, r3d_dem_base, r3d_dem_ox, r3d_dem_oz) }
if r3d_ortho_path != null { terrain_use_ortho(r3d_ortho_path) }
terrain_init()
} else if i == 2 {
} else if t >= 0 and t < TERRAIN_INIT_STEPS {
if t == 0 {
if r3d_dem_path != null { terrain_use_dem(r3d_dem_path, r3d_dem_min, r3d_dem_max, r3d_dem_base, r3d_dem_ox, r3d_dem_oz) }
if r3d_ortho_path != null { terrain_use_ortho(r3d_ortho_path) }
}
terrain_init_step(t)
} else if i == 1 + TERRAIN_INIT_STEPS {
shadow_init()
post_init(gl_w, gl_h)
} else if i == 3 {
} else if i == 2 + TERRAIN_INIT_STEPS {
scatter_init()
actor_init()
} else if i == 4 {
} else if i == 3 + TERRAIN_INIT_STEPS {
grass_init()
r3d_sky_prog = r3d_program("fullscreen.vert", "sky.frag", "")
r3d_fog_density = fl(0.00014)