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render3d: a grass kind - the GPU blades' per-kind numbers are a GrassKind record the game hands over (grass_kind_set), not constants

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GrassKind (grass_kind.ludic) carries what grass.ludic, grass_gpu.ludic, grass.vert, grass_cull.comp and
model.frag's BLADE path held as constants: the cell, s0 / d0 / radius, the row bands and rows, the blade
profile (neck, root, swell, tip, bend), the heights, clumps, widths and arch, where it grows (slope, snow,
the photograph's test), the root / tip / gone-to-seed colours, the far tufts, the root occlusion, the
roughness, the sheen and the wind. Its defaults are those constants exactly, so a game that sets nothing
draws as before. The shaders read them as u_gk_* (the cull as five more Params vec4s, 288 bytes);
grass_reset.comp writes each band's index count so a kind of other rows reaches the draw in order.
grass_quality holds the kind to a settings tier (never denser, never farther); R3D_GRASS_* still win.
grass_profile_w / _bend are the one profile, for the meshes and a game's preview. grass.mesh takes only
the cell: the rest of it is an older copy that already differs from grass.vert, left as it draws.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-29 19:03:33 +03:00
parent d9a73d63bd
commit e908672034
25 changed files with 335 additions and 75 deletions
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4
packages/ludic.render3d/gpu_vk.ludic
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@ -814,8 +814,8 @@ function gvk_startup_state(render3d_st: mut Render3dState) -> void {
render3d_st.gvk_pc_pass = new []int; render3d_st.gvk_pc_pipe = new []long
render3d_st.gvk_pc_last = words(4096)
for i in 0 .. 4096 { render3d_st.gvk_pc_last[i] = -1 }
render3d_st.gg_rb = words(4); render3d_st.gg_cb = words(1); render3d_st.gg_bufs = words(3)
render3d_st.gg_texs = words(7); render3d_st.gg_pr = words(52)
render3d_st.gg_rb = words(8); render3d_st.gg_cb = words(1); render3d_st.gg_bufs = words(3)
render3d_st.gg_texs = words(7); render3d_st.gg_pr = words(72)
if render3d_st.gpu_unit_2d == null {
render3d_st.gpu_unit_2d = words(32)
for i in 0 .. 32 { render3d_st.gpu_unit_2d[i] = -1 }