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refactor(render3d): vertex data and draws behind gpu.ludic

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Every vertex array, vertex and index buffer, attribute pointer, instance divisor, stream
upload and draw call now goes through gpu_mesh_* / gpu_buffer_* / gpu_draw_*, and no other
file in the package names them. A Mesh records its layout as it is built - which buffer
feeds which attribute at what stride and offset, per vertex or per instance - so a backend
that bakes vertex input into a pipeline can read it back. On OpenGL each call is the GL it
replaces, in the same order: the five fixed viewpoints render bit-identically and the game's
self-tests report exactly what they did before.

scatter_attach takes the mesh rather than its vertex array; a mesh now frees every vertex
buffer it owns (glTF meshes used to keep all but the first); the two helpers nothing called,
mesh_grid_patches and mesh_instance_buffer, are gone.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-15 10:21:55 +03:00
parent 3fb1b7cd87
commit 43c379aa0f
8 changed files with 271 additions and 267 deletions
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26
packages/ludic.render3d/skin.ludic
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@ -51,25 +51,19 @@ function skin_attribs(m: Mesh, attrs: Val) -> bool {
if value_has(attrs, "JOINTS_0") == 0 or value_has(attrs, "WEIGHTS_0") == 0 { return false }
let jd = gltf_accessor(value_as_int(value_get(attrs, "JOINTS_0")))
var jsz = 1
var jtype = GL_UNSIGNED_BYTE
if gltf_ctype == 5123 { jsz = 2; jtype = GL_UNSIGNED_SHORT }
let jb = gl_buffer()
gl_bind_buffer(GL_ARRAY_BUFFER, jb)
gl_buffer_data(GL_ARRAY_BUFFER, gltf_count * gltf_comps * jsz, jd, GL_STATIC_DRAW)
gl_enable_vertex_attrib_array(5)
gl_vertex_attrib_pointer(5, gltf_comps, jtype, 0, 0, null) # integers, read as floats
var jtype = GPU_U8
if gltf_ctype == 5123 { jsz = 2; jtype = GPU_U16 }
gpu_mesh_vertices(m, jd, gltf_count * gltf_comps * jsz, GPU_STATIC)
gpu_mesh_attr(m, 5, gltf_comps, jtype, 0, 0, false) # integers, read as floats
free(jd)
let wd = gltf_accessor(value_as_int(value_get(attrs, "WEIGHTS_0")))
var wsz = 4
var wtype = GL_FLOAT
var norm = 0
if gltf_ctype == 5123 { wsz = 2; wtype = GL_UNSIGNED_SHORT; norm = 1 }
if gltf_ctype == 5121 { wsz = 1; wtype = GL_UNSIGNED_BYTE; norm = 1 }
let wb = gl_buffer()
gl_bind_buffer(GL_ARRAY_BUFFER, wb)
gl_buffer_data(GL_ARRAY_BUFFER, gltf_count * gltf_comps * wsz, wd, GL_STATIC_DRAW)
gl_enable_vertex_attrib_array(6)
gl_vertex_attrib_pointer(6, gltf_comps, wtype, norm, 0, null)
var wtype = GPU_F32
var norm = false
if gltf_ctype == 5123 { wsz = 2; wtype = GPU_U16; norm = true }
if gltf_ctype == 5121 { wsz = 1; wtype = GPU_U8; norm = true }
gpu_mesh_vertices(m, wd, gltf_count * gltf_comps * wsz, GPU_STATIC)
gpu_mesh_attr(m, 6, gltf_comps, wtype, 0, 0, norm)
free(wd)
return true
}