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wip: uncommitted work gathered before the branch is merged into main

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-30 17:18:48 +03:00
parent cc384efee0
commit 737d6e1859
30 changed files with 307 additions and 120 deletions
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13
packages/ludic.render3d/shaders/terrain.frag
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@ -16,6 +16,7 @@ uniform float u_ortho_on;
uniform sampler2D u_rock_d; uniform sampler2D u_rock_n; uniform sampler2D u_rock_a;
uniform sampler2D u_snow_d; uniform sampler2D u_carpet; // the clump cards baked straight down (alpha = coverage)
uniform float u_carpet_on;
uniform float u_grass_reach; // where the GPU blades stop (0: none): the ground under them is in their shade
uniform float u_snow_line;
uniform float u_lake_level; // the ground just above the water is wet and dark
// ---- RAIN THAT LEAVES SOMETHING BEHIND -----------------------------------------------------
@ -339,6 +340,18 @@ vec3 groundShade(vec3 p, vec3 N, float slope, float dist, float viewDepth, bool
vec3 cc = cp.rgb * vec3(0.5, 0.57, 0.45) * mix(vec3(0.85, 0.92, 0.9), vec3(1.1, 1.05, 0.85), smoothstep(-0.35, 0.35, N.z)) * (0.75 + 0.35 * lush);
gA = mix(gA, cc, max(cp.a, 0.35) * carpetW * 0.97);
}
// The blades' own patches (grass_cull.comp's bladeField): patchiness and dry patches, so where
// the blades thin out the ground they stand on carries the same meadow, not a lawn
{
float patchy = fbmC(cheap, p.xz * 0.045, 3) * 0.5 + 0.5;
float dryp = smoothstep(0.2, 0.8, gnoise(p.xz * 0.33 + 17.0) * 0.5 + 0.5);
vec3 pf = mix(vec3(0.7, 0.8, 0.55), vec3(1.1, 1.05, 0.85), patchy) * mix(vec3(0.92, 1.0, 0.95), vec3(1.30, 1.10, 0.62), dryp);
// and the tussocks' own shade, half a metre across: where blades stand a pixel wide the ground
// is most of what shows, and it has to carry the same light and dark as the blades on it
float tus = 0.55 + 0.80 * (gnoise(p.xz * 1.9 + 41.0) * 0.5 + 0.5);
gA *= mix(vec3(1.0), pf / vec3(0.95, 0.96, 0.72) * tus, grassW);
if (u_grass_reach > 0.0) gA *= mix(1.0, mix(0.50, 1.0, smoothstep(u_grass_reach * 0.25, u_grass_reach, dist)), grassW);
}
// Subalpine forest floor: dark duff where the stands are dense. The photograph-driven
// term marks duff only where the survey actually shows dense conifer, and is the same
// at any distance — ground shading must not depend on where the viewer is.