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Feat/outline thickness and tp weapon hold #22

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Dotts merged 43 commits from feat/outline-thickness-and-tp-weapon-hold into main 2026-07-27 23:22:53 -07:00
Conversation 0 Commits 43 Files Changed 168
+17393 -15884
16 changed files with 17393 additions and 15884 deletions
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assets/characters/skins/aria.rig.json
+2668 -2493
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File diff suppressed because it is too large Load Diff
assets/characters/skins/kiyoko.rig.json
+3269 -3118
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File diff suppressed because it is too large Load Diff
assets/characters/skins/mannequin.rig.json
+203 -179
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@@ -1,183 +1,207 @@
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assets/characters/skins/miku.rig.json
+225 -179
View File
@@ -1,183 +1,229 @@
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"material": "hair",
"class": "hair",
"detail": "hair",
"why": "material name says 'hair'",
"verts": 500,
"textured": true,
"chain_share": {}
},
{
"mesh": "Object_2",
"surface": 3,
"material": "face",
"class": "body",
"detail": "face",
"why": "material name says 'face'",
"verts": 461,
"textured": true,
"chain_share": {}
}
]
}
assets/characters/skins/momo.rig.json
+1922 -1859
View File
File diff suppressed because it is too large Load Diff
assets/characters/skins/taila.rig.json
+8226 -8016
View File
File diff suppressed because it is too large Load Diff
characters/skin_surfaces.gd
+116
View File
@@ -0,0 +1,116 @@
extends RefCounted
class_name SkinSurfaces
## What every surface of a character IS — body, cloth, hair or accessory.
##
## Written at build time by tools/surface_map.py into `<skin>.rig.json`, read
## here. Nothing at runtime re-derives it, which is the point: the question has
## one right answer per model and it is knowable in Blender, where the mesh, the
## weights and the skeleton are all in hand. Asking it again from a material at
## load time is how the mannequin's flat yellow body came to be rendered as a
## black silhouette — "untextured" is not the same question as "is ink".
##
## The heuristic that mistake came from is still here, as `guess()`, and still
## earns its place: it is the fallback for a model imported before the surface
## table existed, or one whose material genuinely says nothing. But it is now
## the last resort rather than the only source.
const BODY := "body"
const CLOTH := "cloth"
const HAIR := "hair"
const ACCESSORY := "accessory"
const LINEWORK := "linework"
## Same threshold as tools/surface_map.INK_LEVEL. The two must agree, or a model
## with a surface table would render differently from one without.
const INK_LEVEL := 0.18
var _by_slot: Dictionary = {} # "mesh|index" -> record
var _by_material: Dictionary = {} # material name -> record
## Materials used by two surfaces the classifier disagreed about. Taila reuses
## `ClothA` on three meshes and `FullBlack` on three more; those agree, so they
## stay usable. One that did not would silently give whichever surface was read
## first, so it is dropped from the material index instead and falls back to the
## slot key.
var _material_conflict: Dictionary = {}
static func from_rig_info(rig_info: Dictionary) -> SkinSurfaces:
var out := SkinSurfaces.new()
for record in rig_info.get("surfaces", []):
if not record is Dictionary:
continue
out._by_slot["%s|%d" % [record.get("mesh", ""),
int(record.get("surface", 0))]] = record
var mat: String = record.get("material", "")
if mat == "":
continue
var seen = out._by_material.get(mat)
if seen != null and seen.get("class", "") != record.get("class", ""):
out._material_conflict[mat] = true
else:
out._by_material[mat] = record
return out
func is_empty() -> bool:
return _by_slot.is_empty()
## The build-time record for one surface, or an empty Dictionary.
##
## The mesh node name and surface index are tried first because they name
## exactly one surface. The material name is the fallback because it is what
## survives best — every character in this game arrives with its meshes called
## `Object_7` through `Object_32`, and a renamed node would take the slot key
## with it while `ClothB` stays `ClothB`.
func lookup(mesh_name: String, surface_index: int, material_name: String) -> Dictionary:
var by_slot = _by_slot.get("%s|%d" % [mesh_name, surface_index])
if by_slot != null:
return by_slot
if material_name != "" and not _material_conflict.has(material_name):
var by_mat = _by_material.get(material_name)
if by_mat != null:
return by_mat
return {}
## (class, detail) for a surface with no build-time record.
##
## This is the pre-surface-table heuristic, kept verbatim for the one job it is
## still right for. It answers a narrow question — is this untextured surface
## part of the model's own DRAWING? — and it answers it from the three things
## that actually distinguish line-work: being black, being drawn inside-out, or
## saying outright that it is an eye card. Anything else is treated as body,
## which is the safe answer because body is ordinary character shading.
static func guess(mat: BaseMaterial3D) -> Array:
if mat == null:
return [BODY, "skin"]
var name := mat.resource_name.to_lower()
if mat.albedo_texture == null:
if name.begins_with("eyes"):
return [BODY, "eyes_highlight" if name.contains("hl") else "eyes_ink"]
if mat.cull_mode == BaseMaterial3D.CULL_FRONT:
return [LINEWORK, "outline_hull"]
var c: Color = mat.albedo_color
if maxf(maxf(c.r, c.g), c.b) < INK_LEVEL:
return [LINEWORK, "outline_hull"]
return [BODY, "skin"]
## (class, detail) for a surface, from the table where it has an entry and from
## the heuristic where it does not.
##
## The cull-mode test is re-run even when the table HAS an entry, because that
## is the one piece of evidence the build side cannot see: glTF has no way to
## say "draw only the backfaces", so an inverted-hull outline arrives in Blender
## indistinguishable from an ordinary surface and only shows itself here.
func resolve(mesh_name: String, surface_index: int, mat: BaseMaterial3D) -> Array:
var material_name := "" if mat == null else mat.resource_name
if mat != null and mat.albedo_texture == null \
and mat.cull_mode == BaseMaterial3D.CULL_FRONT:
return [LINEWORK, "outline_hull"]
var record := lookup(mesh_name, surface_index, material_name)
if record.is_empty():
return guess(mat)
return [record.get("class", BODY), record.get("detail", "")]
characters/skin_surfaces.gd.uid
+1
View File
@@ -0,0 +1 @@
uid://diqctdcqixjqg
characters/skinned_player_model.gd
+44 -6
View File
@@ -92,6 +92,9 @@ var _joint_helpers: Array = []
## and leg colliders, written by tools/retarget.py. Empty for a model that was
## rebound onto the library skeleton instead of keeping its own rig.
var _rig_info: Dictionary = {}
## What each surface of this model IS — body, cloth, hair, accessory. Read from
## the same sidecar; drives the per-class cel look and answers `surfaces_of()`.
var _surfaces: SkinSurfaces = null
var _spring_mod: SpringBones
var is_holding_weapon: bool = false
## Which skin this is, so per-character hold tuning can be looked up. Set by
@@ -183,6 +186,11 @@ func load_model(path: String) -> void:
_resolved_clips.clear()
_current_clip = ""
_weapon_attachment = null
# Cleared, not left standing: a model with no skeleton never reaches the
# branch that reloads these, and would otherwise be described by the LAST
# character's sidecar.
_rig_info = {}
_surfaces = null
var scene := GLBLoader.load(path)
if not scene:
@@ -240,13 +248,16 @@ func load_model(path: String) -> void:
print("SkinnedPlayerModel: '%s' — %d cloth/hair bones on springs"
% [path.get_file(), driven])
# Cel-shaded look: toon shading over the imported textures + ink outline.
# Cel-shaded look: toon shading over the imported textures...
LevelMaterials.apply_toon_recursive(scene)
# ...then the character-only pass: flat line-work + softer banding (see the
# function — toon-lighting the model's own outline shell is what put a white
# rim on every hair strand, and re-banding already-shaded textures read as
# gloss).
LevelMaterials.apply_character_look(scene)
# ...then the character-only pass, which is where the surface table earns
# its keep: it says which surfaces are hair, cloth, body or an accessory, so
# each can take its own outline weight and banding instead of all of them
# taking numbers calibrated on skin. It also identifies the model's own
# line-work by name and weight rather than by "is it nearly black", which is
# what used to render a flat-coloured model as a black silhouette.
_surfaces = SkinSurfaces.from_rig_info(_rig_info)
LevelMaterials.apply_character_look(scene, _surfaces)
if animation_player:
_index_animations()
_setup_anim_tree(scene)
@@ -375,6 +386,33 @@ func _load_rig_info(model_path: String) -> Dictionary:
return parsed
## Every [mesh, surface index] of this model belonging to one surface class —
## SkinSurfaces.BODY, CLOTH, HAIR or ACCESSORY.
##
## The point of separating a character into a body, garments and hair is that
## the game can then treat them differently, and it can only do that if it can
## ask which is which. This is that question. It is used by the rig lab to let
## an artist isolate a class, and it is what a damage flash on skin only, or a
## hidden hat, or a per-class LOD would be built on.
func surfaces_of(surface_class: String) -> Array:
var out: Array = []
if _surfaces == null:
return out
for mi in find_children("*", "MeshInstance3D", true, false):
if mi.mesh == null:
continue
for s in mi.mesh.get_surface_count():
var src: BaseMaterial3D = mi.mesh.surface_get_material(s) as BaseMaterial3D
if _surfaces.resolve(mi.name, s, src)[0] == surface_class:
out.append([mi, s])
return out
## The surface table, for tools that want to show or edit it. May be null.
func surface_table() -> SkinSurfaces:
return _surfaces
## Make sure every skinned MeshInstance3D is actually driven by the skeleton.
## A correctly-exported GLB binds automatically, but if one imports with a skin
## resource whose `skeleton` NodePath doesn't resolve, the mesh renders its bind
debug/dump_surfaces.gd
+86
View File
@@ -0,0 +1,86 @@
extends SceneTree
## Print every mesh surface of every shipping skin: node name, surface index,
## material name, whether it carries a texture, its albedo and cull mode, and
## which bones dominate it.
##
## This exists because the surface table in the rig sidecar is written by Blender
## and read by Godot, and the two do not have to agree on what anything is
## called. Rather than assume the glTF round trip preserves names and ordering,
## this measures what Godot ends up holding, so the sidecar can be keyed on
## something that actually survives.
##
## godot --headless --path . -s res://debug/dump_surfaces.gd
func _init() -> void:
var registry := "res://assets/characters/skins/skins.json"
var data = JSON.parse_string(FileAccess.get_file_as_string(registry))
for entry in data["skins"]:
var path: String = entry.get("model", "")
if path == "" or not ResourceLoader.exists(path):
continue
print("\n=== %s (%s)" % [entry["id"], path])
var scene: Node = load(path).instantiate()
var skel: Skeleton3D = _first_skeleton(scene)
for mi in scene.find_children("*", "MeshInstance3D", true, false):
if mi.mesh == null:
continue
var owner_names := _dominant_bones(mi, skel)
for s in mi.mesh.get_surface_count():
var m: BaseMaterial3D = mi.mesh.surface_get_material(s) as BaseMaterial3D
var mat_name := "<none>" if m == null else m.resource_name
var tex := m != null and m.albedo_texture != null
var col := Color.WHITE if m == null else m.albedo_color
var cull := -1 if m == null else int(m.cull_mode)
print(" %-34s s%d mat=%-28s tex=%s albedo=(%.2f,%.2f,%.2f) cull=%d bones=%s"
% [mi.name, s, mat_name, "Y" if tex else "n",
col.r, col.g, col.b, cull, owner_names])
scene.free()
quit()
func _first_skeleton(node: Node) -> Skeleton3D:
if node is Skeleton3D:
return node
for c in node.get_children():
var found := _first_skeleton(c)
if found:
return found
return null
## The five bones holding the most dominant-weight vertices on this mesh.
func _dominant_bones(mi: MeshInstance3D, skel: Skeleton3D) -> String:
if mi.skin == null or skel == null or mi.mesh == null:
return "<unskinned>"
var bone_of := {}
for b in mi.skin.get_bind_count():
var n := mi.skin.get_bind_name(b)
bone_of[b] = skel.find_bone(n) if n != "" else mi.skin.get_bind_bone(b)
var tally := {}
var arrays: Array = mi.mesh.surface_get_arrays(0)
var bones: PackedInt32Array = arrays[Mesh.ARRAY_BONES]
var weights: PackedFloat32Array = arrays[Mesh.ARRAY_WEIGHTS]
if bones.is_empty():
return "<no weights>"
var verts: PackedVector3Array = arrays[Mesh.ARRAY_VERTEX]
var per := bones.size() / maxi(1, verts.size())
for v in verts.size():
var best := -1
var best_w := 0.0
for k in per:
var w := weights[v * per + k]
if w > best_w:
best_w = w
best = bones[v * per + k]
if best >= 0 and best_w > 0.25:
var bi: int = bone_of.get(best, -1)
if bi >= 0:
var nm := skel.get_bone_name(bi)
tally[nm] = tally.get(nm, 0) + 1
var names: Array = tally.keys()
names.sort_custom(func(a, b): return tally[a] > tally[b])
var out: PackedStringArray = []
for i in mini(5, names.size()):
out.append("%s:%d" % [names[i], tally[names[i]]])
return ", ".join(out)
debug/dump_surfaces.gd.uid
+1
View File
@@ -0,0 +1 @@
uid://ch7c3vv6t2gei
debug/surface_class_check.gd
+70
View File
@@ -0,0 +1,70 @@
extends SceneTree
## Does every surface of every shipping skin get classified, and does the
## classification survive the trip from Blender into Godot?
##
## The surface table is written by tools/surface_map.py against the Blender
## scene and read by SkinSurfaces against the loaded glTF. Nothing forces the
## two to agree on what anything is called, so this checks that they do — by
## counting how many surfaces resolve from the TABLE versus how many fell
## through to the heuristic. A model whose names stopped matching still renders,
## because the fallback catches it; it just quietly loses its per-class art
## direction. That is exactly the kind of silent regression this catches.
##
## godot --headless --path . -s res://debug/surface_class_check.gd
var _failures: int = 0
func _init() -> void:
var data = JSON.parse_string(FileAccess.get_file_as_string(
"res://assets/characters/skins/skins.json"))
for entry in data["skins"]:
_check_skin(entry["id"], entry.get("model", ""))
print("\n%s" % ("FAILED (%d)" % _failures if _failures > 0 else "All skins classified"))
quit(1 if _failures > 0 else 0)
func _check_skin(id: String, path: String) -> void:
if path == "" or not ResourceLoader.exists(path):
return
var side := path.get_basename() + ".rig.json"
var rig = JSON.parse_string(FileAccess.get_file_as_string(side))
if typeof(rig) != TYPE_DICTIONARY:
print("%-10s NO SIDECAR" % id)
_failures += 1
return
var surfaces := SkinSurfaces.from_rig_info(rig)
var scene: Node = load(path).instantiate()
var tally := {}
var from_table := 0
var from_guess := 0
var unmatched: PackedStringArray = []
for mi in scene.find_children("*", "MeshInstance3D", true, false):
if mi.mesh == null:
continue
for s in mi.mesh.get_surface_count():
var src: BaseMaterial3D = mi.mesh.surface_get_material(s) as BaseMaterial3D
var mat_name := "" if src == null else src.resource_name
if surfaces.lookup(mi.name, s, mat_name).is_empty():
from_guess += 1
unmatched.append("%s|%d|%s" % [mi.name, s, mat_name])
else:
from_table += 1
var cls: String = surfaces.resolve(mi.name, s, src)[0]
tally[cls] = tally.get(cls, 0) + 1
scene.free()
var parts: PackedStringArray = []
var keys: Array = tally.keys()
keys.sort()
for k in keys:
parts.append("%s x%d" % [k, tally[k]])
print("%-10s %d surfaces — %s (table %d, fallback %d)"
% [id, from_table + from_guess, ", ".join(parts), from_table, from_guess])
if from_guess > 0:
print(" unmatched: %s" % ", ".join(unmatched))
_failures += 1
if surfaces.is_empty():
print(" sidecar has no surface table")
_failures += 1
debug/surface_class_check.gd.uid
+1
View File
@@ -0,0 +1 @@
uid://bhafeud8lp38x
scenes/maps/level_materials.gd
+98 -34
View File
@@ -143,53 +143,117 @@ const CHARACTER_INK := Color(0.07, 0.06, 0.09)
## only its backfaces show. Nothing else on a character is.
## NAMED eye cards say so — they are kept, not hidden, and need to reach
## the branch below whatever colour they are.
static func _is_line_work(src: BaseMaterial3D) -> bool:
if src.resource_name.to_lower().begins_with("eyes"):
return true
if src.cull_mode == BaseMaterial3D.CULL_FRONT:
return true
var c: Color = src.albedo_color
return maxf(maxf(c.r, c.g), c.b) < 0.18
##
## That heuristic now lives in `SkinSurfaces.guess`, where it is the FALLBACK
## rather than the only answer — see below.
static func apply_character_look(root: Node) -> void:
## Shadow tint measured off the Sketchfab reference render: sampling Taila's
## hair there, shadow/midtone lands near (0.63, 0.53, 0.70). Green drops
## hardest, and that is what keeps copper hair COPPER in shadow — the level
## default (0.62, 0.65, 0.78) lifts green above red and washes ginger toward a
## dull brown.
const CHARACTER_SHADOW := Color(0.64, 0.56, 0.72)
## Per-class art direction. This is what the surface table BUYS: until a
## character could say which of its surfaces were hair and which were a jacket,
## every one of them had to take the same numbers, and those numbers were
## calibrated on skin.
##
## outline how thick the inked silhouette is, in metres of normal offset
## band terminator softness — 0 is a hard cel break, 1 is a smooth ramp
## mid_tone where the second, subtler step sits
## rim backlight strength, for separation from the background
##
## `body` is deliberately identical to what every surface used to get, so the
## look this was calibrated against does not move. The others are departures
## from it, and each one is a departure for a reason:
##
## hair THE thinnest line, and it is not a small difference. A hair mesh
## is dozens of near-parallel strands a few millimetres apart; at
## the body's 5 mm every strand's hull swallows its neighbour and
## the whole head reads as one solid dark cap instead of hair.
## Softest banding too — the painted texture already carries the
## form, and a hard break on top of it slides across as gloss.
## cloth a heavier line and a crisper break. A garment's silhouette is
## most of what separates a character from the background at range,
## and folds need a defined terminator to read as fabric rather
## than as a painted-on costume.
## accessory heaviest and crispest, plus real rim. These are small, rigid and
## usually the most saturated thing on the character; they are
## supposed to pop.
const CHARACTER_LOOK := {
SkinSurfaces.BODY: {"outline": 0.0050, "band": 0.16, "mid_tone": 0.92, "rim": 0.05},
SkinSurfaces.CLOTH: {"outline": 0.0058, "band": 0.13, "mid_tone": 0.90, "rim": 0.06},
SkinSurfaces.HAIR: {"outline": 0.0034, "band": 0.20, "mid_tone": 0.94, "rim": 0.04},
SkinSurfaces.ACCESSORY: {"outline": 0.0068, "band": 0.10, "mid_tone": 0.88, "rim": 0.10},
}
## Second pass for IMPORTED CHARACTER models, run right after
## apply_toon_recursive. `surfaces` is the build-time surface table from the
## rig sidecar; pass null and every surface falls back to the heuristic.
static func apply_character_look(root: Node, surfaces: SkinSurfaces = null) -> void:
for mi in root.find_children("*", "MeshInstance3D", true, false):
if not mi.mesh:
continue
# The outline moves from the instance to the individual surfaces, which
# is the only way it can differ between them — and it has to, because
# Miku's body, face and hair are three surfaces of ONE mesh, so an
# instance-wide overlay can only ever give all three the same weight.
mi.material_overlay = null
for s in range(mi.mesh.get_surface_count()):
var src: BaseMaterial3D = mi.mesh.surface_get_material(s) as BaseMaterial3D
if src == null:
continue
if src.albedo_texture == null and _is_line_work(src):
# Untextured AND dark or inside-out — the model's own line-work.
var name := src.resource_name.to_lower()
var flat := StandardMaterial3D.new()
flat.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
flat.cull_mode = src.cull_mode
if not name.begins_with("eyes"):
# The outline HULL: hide it (see above). Fully transparent
# rather than deleted so the surface indices, and therefore
# the mesh's own skin bindings, stay exactly as imported.
flat.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA
flat.albedo_color = Color(0, 0, 0, 0)
else:
# An eye card. "HL" marks the highlight (the glint in the
# pupil) — that one really is meant to be white.
flat.albedo_color = Color.WHITE if name.contains("hl") \
else CHARACTER_INK
mi.set_surface_override_material(s, flat)
var resolved: Array = SkinSurfaces.guess(src) if surfaces == null \
else surfaces.resolve(mi.name, s, src)
var surface_class: String = resolved[0]
var detail: String = resolved[1]
if detail == "outline_hull":
# A duplicated ink shell. Its skin weights do not track the base
# mesh through a deep bend, so during a run it tears into spikes
# and stretches sheets between the ankles — that is what made the
# ankle cuffs look welded together. It is also redundant: the
# per-surface outline below and the screen-space ink_edge pass
# both already draw one. So it is hidden, fully transparent
# rather than deleted, so the surface indices — and therefore the
# mesh's own skin bindings — stay exactly as imported.
var hidden := StandardMaterial3D.new()
hidden.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
hidden.cull_mode = src.cull_mode
hidden.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA
hidden.albedo_color = Color(0, 0, 0, 0)
mi.set_surface_override_material(s, hidden)
continue
if detail == "eyes_ink" or detail == "eyes_highlight":
# A lash or iris card: a real facial feature, kept — and kept
# FLAT, because the glTF import hands every untextured surface a
# default near-white albedo, and toon-lighting the black ones was
# the thin white rim that used to trace every hair strand.
var card := StandardMaterial3D.new()
card.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
card.cull_mode = src.cull_mode
card.albedo_color = Color.WHITE if detail == "eyes_highlight" \
else CHARACTER_INK
mi.set_surface_override_material(s, card)
continue
var toon: ShaderMaterial = mi.get_surface_override_material(s) as ShaderMaterial
if toon == null:
continue
toon.set_shader_parameter("band_softness", 0.16)
toon.set_shader_parameter("mid_tone", 0.92)
# Shadow tint measured off the Sketchfab reference render: sampling
# Taila's hair there, shadow/midtone lands near (0.63, 0.53, 0.70).
# Green drops hardest, and that is what keeps copper hair COPPER in
# shadow — the level default (0.62, 0.65, 0.78) lifts green above
# red and washes ginger toward a dull brown.
toon.set_shader_parameter("shadow_color", Color(0.64, 0.56, 0.72))
var look: Dictionary = CHARACTER_LOOK.get(
surface_class, CHARACTER_LOOK[SkinSurfaces.BODY])
toon.set_shader_parameter("band_softness", look["band"])
toon.set_shader_parameter("mid_tone", look["mid_tone"])
toon.set_shader_parameter("rim_strength", look["rim"])
toon.set_shader_parameter("shadow_color", CHARACTER_SHADOW)
# Eye irises and highlights are flat art on a curved ball; an ink
# line around them reads as a second pupil.
toon.next_pass = null if detail == "eyes" \
else outline(look["outline"])
## Swap every mesh surface under `node` to toon shading and add an
tools/retarget.py
+15
View File
@@ -55,6 +55,7 @@ from mathutils import Matrix, Quaternion, Vector
sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
import gltf_fix
import rig_map
import surface_map
from rig_map import RigRoles, build_map, is_cosmetic, is_segment_of, tokens
argv = sys.argv
@@ -1039,8 +1040,22 @@ def describe_rig(arm, roles, mapping, meshes):
for (digit, side), bones in roles.fingers.items():
finger_out["%s.%s" % (digit, side)] = bones
# What each surface IS — body, cloth, hair or accessory. Derived from the
# chains resolved just above, so the surface table and the cloth solver can
# never disagree about which bones are a skirt. See tools/surface_map.py.
chain_class = {}
for chain in chains:
for bone in chain["bones"]:
chain_class[bone] = chain["class"]
role_bone_names = [n for n in roles_out.values() if isinstance(n, str) and n]
for value in roles_out.values():
if isinstance(value, list):
role_bone_names.extend(value)
return {"roles": roles_out, "fingers": finger_out,
"chains": chains, "twist": twist,
"surfaces": surface_map.describe_surfaces(
meshes, chain_class, driven, role_bone_names),
"colliders": _leg_colliders(
arm, roles, _dominant_vertices(meshes, arm, min_weight=0.6),
_body_points(meshes)),
tools/surface_map.py
+448
View File
@@ -0,0 +1,448 @@
#!/usr/bin/env python3
"""
Say what every surface of a character IS: body, cloth, hair or accessory.
The pipeline already refuses to join meshes, so a character arrives at runtime
as the eighteen separate pieces the artist authored. But nothing recorded what
those pieces WERE, so every system downstream had to re-guess from scratch:
`LevelMaterials.apply_character_look` decides "is this the model's own ink
line-work?" by asking whether the material is untextured and nearly black, and
that heuristic has already cost one debugging cycle — it rendered Quaternius'
flat-coloured mannequin as a black silhouette, because a yellow body and a
lilac joint are untextured too.
Guessing per-frame from a material is the wrong place to ask the question. The
answer is knowable ONCE, at build time, where the mesh, the weights and the
skeleton are all in hand:
* the material NAME is usually explicit, and on VRoid exports it is formal —
`N00_000_00_Body_00_SKIN_Instance` carries its own class infix, and every
VRoid character in the game uses SKIN / FACE / EYE / HAIR / CLOTH;
* the WEIGHTS are decisive when the name says nothing: a surface whose
vertices are pulled by the skirt chain is a skirt, whatever it is called;
* the MATERIAL FLAGS catch the model's own line-work, which is the one class
that is not really a surface of the character at all.
So the classification is written into `<name>.rig.json` beside the roles and the
cloth chains, and the runtime reads it instead of re-deriving it. That is what
lets per-class art direction exist at all — a different outline width on hair
than on the body, cloth that takes the garment shading, accessories that keep
their crisp banding — and it gives the rig lab something to show and to let an
artist correct.
Two ways in:
# As part of an import — retarget.py calls describe_surfaces() directly.
# Backfilling a character that is already exported, without re-importing it
blender --background --python tools/surface_map.py -- \
assets/characters/skins/taila.glb
The backfill route loads the SHIPPED glb, so the names it records are by
construction the names Godot will see. Nothing else is touched: the surface
table is merged into the existing sidecar and every other key is left alone.
"""
import json
import os
import re
import sys
sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
import rig_map
# ── What a surface can be ────────────────────────────────────────────────────
#
# Four classes, because that is what the rest of the game wants to reason about,
# plus one that is not a surface of the character at all.
#
# body skin, face, eyes — anything that is the character themselves
# cloth garments: tops, skirts, shoes, sleeves, capes
# hair hair, including the parts of it that are welded to the head
# accessory rigid worn props: hats, glasses, bags, jewellery, horns
# linework the model's own outline shell — drawn, not worn (see below)
#
# `detail` narrows it without forcing a new class on anyone who does not care.
BODY, CLOTH, HAIR, ACCESSORY, LINEWORK = (
"body", "cloth", "hair", "accessory", "linework")
# Material-name tokens, most specific class first. Order is the whole design
# here: `N00_000_00_EyeIris_00_EYE_Instance` carries both "eye" and "iris" and
# must not be caught by a later, broader rule, while `FaceEyeline` tokenises to
# "face" + "eyeline" and stays a face.
NAME_RULES = [
({"eye", "eyes", "iris", "pupil", "sclera", "cornea"}, BODY, "eyes"),
({"hair", "bang", "bangs", "fringe", "ponytail", "braid", "sidelock"},
HAIR, "hair"),
({"brow", "eyebrow", "eyeline", "eyelash", "lash", "mouth", "lip", "teeth",
"tooth", "tongue", "nose", "face", "facial"}, BODY, "face"),
({"cloth", "clothes", "clothing", "garment", "outfit", "costume", "uniform",
"top", "tops", "bottom", "bottoms", "skirt", "dress", "onepiece", "shirt",
"blouse", "jacket", "coat", "hoodie", "pants", "trousers", "shorts",
"socks", "stocking", "stockings", "shoe", "shoes", "boot", "boots",
"sleeve", "apron", "cape", "cloak", "scarf", "tie", "necktie", "collar",
"ribbon", "frill", "underwear", "bra", "panty", "swimsuit"},
CLOTH, "garment"),
({"accessory", "acc", "hat", "cap", "helmet", "glasses", "goggle",
"goggles", "mask", "bag", "backpack", "belt", "buckle", "earring",
"necklace", "choker", "bracelet", "pin", "clip", "badge", "horn", "wing",
"weapon", "prop", "item", "jewel", "gem", "strap", "headphone",
"headphones", "antenna", "halo"}, ACCESSORY, "accessory"),
({"body", "skin", "torso", "chest", "arm", "arms", "leg", "legs", "hand",
"hands", "foot", "feet", "head"}, BODY, "skin"),
]
# Spring-chain classes, grouped by what the SURFACE they pull should be called.
# `spring_class` already tells the solver how a chain should behave; this says
# what the geometry hanging off it is. Bust bones move like cloth and belong to
# the body, which is exactly why the two questions are asked separately.
CHAIN_TO_SURFACE = {
"hair": HAIR,
"skirt": CLOTH, "cloth": CLOTH, "coat": CLOTH, "cape": CLOTH,
"scarf": CLOTH, "sleeve": CLOTH, "ribbon": CLOTH,
"breast": BODY, "bust": BODY,
"tail": ACCESSORY, "feather": ACCESSORY, "antenna": ACCESSORY,
"wing": ACCESSORY, "strap": ACCESSORY,
}
# How much of a surface has to hang off one kind of chain before that decides
# it. Deliberately low: VRoid welds the whole cap of the hair to the head bone
# and springs only the strands, so kiyoko's hair mesh is 85% head — a majority
# rule would call it skin. A surface with a sixth of itself on skirt bones is a
# skirt; nothing else on a character has any weight on those bones at all.
CHAIN_SHARE = 0.05
# Darker than this, with no texture, and it is ink rather than a colour. Kept
# identical to LevelMaterials._is_line_work, which this replaces — the two must
# agree, or a model with no surface table would render differently from one
# with it.
INK_LEVEL = 0.18
def datablock_name(name):
"""A Blender datablock name as the glTF it came from spelled it.
Blender uniquifies a name it has already seen by appending `.001`, so a
second import of the same character in one session gives `ClothA.001`.
That, and only that, is stripped.
Explicitly NOT `rig_map.strip_gltf_suffix`, which removes a trailing
`_<digits>` — right for bones, whose names the glTF importer really does
suffix with a node index, and catastrophic here: every mesh in this game is
called something like `Object_15`, and stripping would collapse all
eighteen of Taila's to `Object`.
"""
return re.sub(r"\.\d{3}$", "", name)
def _tokens(name):
"""Material name -> lowercase word tokens, splitting camelCase too.
`N00_001_03_Bottoms_01_CLOTH_Instance` -> bottoms, cloth, instance (plus
the numbers), and `EyesFullBlack` -> eyes, full, black. Without the
camelCase split the VRoid names still work and the hand-authored ones do
not, and Taila's are all hand-authored.
"""
spaced = re.sub(r"(?<=[a-z0-9])(?=[A-Z])", " ", name)
return [t for t in re.split(r"[^A-Za-z0-9]+", spaced.lower()) if t]
def classify_by_name(material_name):
"""(class, detail) from the material name alone, or (None, None)."""
toks = set(_tokens(material_name))
for stems, cls, detail in NAME_RULES:
hit = toks & stems
if hit:
return cls, detail
return None, None
def classify_linework(material_name, textured, albedo, front_culled):
"""Is this untextured surface part of the model's own DRAWING?
Lifted wholesale from the runtime rule it replaces, including its history:
"no albedo texture" alone is not the question, and answering it that way
hid the mannequin's yellow body and lilac joints as though they were an
outline shell. What actually distinguishes line-work is being BLACK, being
drawn inside-out, or saying outright that it is an eye card.
Returns a detail string, or None if this is an ordinary flat-coloured
surface that should shade normally.
"""
if textured:
return None
lower = material_name.lower()
if lower.startswith("eyes"):
# A lash or an iris card — a real facial feature, kept. "HL" is the
# glint in the pupil, and that one really is meant to be white.
return "eyes_highlight" if "hl" in lower else "eyes_ink"
if front_culled:
return "outline_hull"
if max(albedo[0], albedo[1], albedo[2]) < INK_LEVEL:
return "outline_hull"
return None
def classify(material_name, textured, albedo, front_culled, chain_shares,
cosmetic_share):
"""Everything known about one surface -> (class, detail, evidence).
Name first where it is explicit, because it is the artist's own statement of
intent and it survives every transform the pipeline applies. Weights second,
because they are the ground truth for anything the name does not say. The
fallback is `body`, which is the safe answer: it gets ordinary character
shading, which is what an unrecognised surface should get.
"""
ink = classify_linework(material_name, textured, albedo, front_culled)
if ink == "outline_hull":
return LINEWORK, ink, "material is untextured ink or inside-out"
if ink is not None:
return BODY, ink, "material names itself an eye card"
cls, detail = classify_by_name(material_name)
if cls is not None:
return cls, detail, "material name says '%s'" % detail
# Nothing in the name. Ask the skeleton what is pulling this geometry.
best = max(chain_shares.items(), key=lambda kv: kv[1], default=(None, 0.0))
if best[0] is not None and best[1] >= CHAIN_SHARE:
surface_cls = CHAIN_TO_SURFACE.get(best[0], CLOTH)
return (surface_cls, best[0],
"%.0f%% of it hangs off %s bones" % (best[1] * 100.0, best[0]))
if cosmetic_share >= 0.5:
return ACCESSORY, "accessory", (
"%.0f%% of it is on bones no clip drives" % (cosmetic_share * 100.0))
return BODY, "skin", "no name or weight evidence — treated as body"
# ── Measuring one Blender scene ──────────────────────────────────────────────
def _dominant_bone_per_vertex(mesh_obj):
"""vertex index -> the vertex group holding its largest weight."""
gname = {g.index: g.name for g in mesh_obj.vertex_groups}
out = {}
for v in mesh_obj.data.vertices:
best = None
for g in v.groups:
if best is None or g.weight > best.weight:
best = g
if best is not None and best.weight > 0.25:
out[v.index] = gname.get(best.group, "")
return out
def _vertices_per_slot(mesh_obj):
"""material slot index -> the set of vertices drawn with it.
A Blender object with four material slots exports as one glTF mesh with
four primitives, which Godot loads as one MeshInstance3D with four
surfaces — Miku is exactly this, one object carrying body, body_parts, hair
and face. Partitioning by polygon is the only way to tell those apart;
reading the object's weights as a whole says all four are the same thing.
"""
per = {}
for poly in mesh_obj.data.polygons:
per.setdefault(poly.material_index, set()).update(poly.vertices)
return per
def describe_surfaces(meshes, chain_class, driven, role_bones):
"""The surface table for one character.
`chain_class` bone name -> spring class ("hair", "skirt", ...)
`driven` bones the animation drives — the body proper
`role_bones` resolved anatomy bone names, also body
Keyed on the MATERIAL name rather than the mesh node name. Node names do not
survive as anything meaningful — every character in the game arrives with
its meshes called `Object_7` through `Object_32` — while material names come
through the glTF round trip intact and are what the artist actually named.
The mesh name and surface index are recorded alongside as hints, so a model
that reuses one material for two different things can still be told apart.
"""
body_bones = set(driven) | set(role_bones)
out = []
for mesh_obj in meshes:
slots = _vertices_per_slot(mesh_obj)
dominant = _dominant_bone_per_vertex(mesh_obj)
mesh_name = datablock_name(mesh_obj.name)
# Surface index, not slot index. The exporter emits one primitive per
# material slot that any polygon actually uses, in slot order, so an
# empty slot in the middle shifts every surface after it down by one.
for surface_index, slot_index in enumerate(sorted(slots)):
verts = slots[slot_index]
mat = (mesh_obj.material_slots[slot_index].material
if slot_index < len(mesh_obj.material_slots) else None)
mat_name = mat.name if mat else ""
# Weight evidence, as a share of the vertices that belong clearly
# to any one bone — not of all vertices, so a surface that is half
# unweighted is not written off as having no evidence.
counted = 0
shares = {}
cosmetic = 0
for vi in verts:
bone = dominant.get(vi)
if not bone:
continue
counted += 1
cls = chain_class.get(bone)
if cls:
shares[cls] = shares.get(cls, 0) + 1
elif bone not in body_bones and rig_map.is_cosmetic(bone):
cosmetic += 1
denom = float(max(1, counted))
shares = {k: v / denom for k, v in shares.items()}
textured, albedo, front_culled = _material_look(mat)
cls, detail, why = classify(
mat_name, textured, albedo, front_culled, shares,
cosmetic / denom)
out.append({
"mesh": mesh_name,
"surface": surface_index,
"material": datablock_name(mat_name),
"class": cls,
"detail": detail,
"why": why,
"verts": len(verts),
"textured": textured,
# Top chain classes pulling this surface, for the rig lab to
# show when someone disagrees with the answer above.
"chain_share": {k: round(v, 3) for k, v in
sorted(shares.items(), key=lambda kv: -kv[1])},
})
return out
def _material_look(mat):
"""(textured, (r, g, b), front_culled) for a Blender material.
Both routes to the same two facts: a glTF imported by Blender's own
importer keeps a Principled BSDF, and one written by gltf_fix may be a
plain emission or have no node tree at all.
`front_culled` is always False here, and honestly so: glTF has no way to say
"draw only the backfaces" — it has a single `doubleSided` flag — so an
inverted-hull outline cannot survive the round trip as a cull mode, and
Blender has no property that would carry it. Every character in the game
imports as CULL_BACK or CULL_DISABLED, never CULL_FRONT. The runtime keeps
the cull-mode test as a backstop for a model that does arrive that way, so
nothing is lost by not being able to see it from here.
"""
if mat is None:
return False, (1.0, 1.0, 1.0), False
front_culled = False
albedo = tuple(mat.diffuse_color[:3])
textured = False
if mat.use_nodes and mat.node_tree:
for node in mat.node_tree.nodes:
if node.type == "TEX_IMAGE" and node.image is not None:
textured = True
if node.type == "BSDF_PRINCIPLED":
base = node.inputs.get("Base Color")
if base is not None and not base.is_linked:
albedo = tuple(base.default_value[:3])
elif node.type == "EMISSION":
col = node.inputs.get("Color")
if col is not None and not col.is_linked:
albedo = tuple(col.default_value[:3])
return textured, albedo, front_culled
# ── Backfilling an already-exported character ────────────────────────────────
def _chain_class_from_sidecar(sidecar):
"""bone -> spring class, taken from the chains the pipeline already found.
Backfilling deliberately reuses the sidecar's own answer rather than
re-deriving it from the bone names: if the two ever disagreed, the surface
table would describe a rig that the solver is not simulating.
"""
out = {}
for chain in sidecar.get("chains", []):
cls = chain.get("class", "cloth")
for bone in chain.get("bones", []):
out[bone] = cls
return out
def _role_bone_names(sidecar):
names = []
for value in sidecar.get("roles", {}).values():
if isinstance(value, list):
names.extend(value)
elif value:
names.append(value)
for bones in sidecar.get("fingers", {}).values():
names.extend(bones)
return names
def _is_character_mesh(obj):
"""Is this mesh part of the character, or is it riding along in the file?
Every skin shipped so far carries a stray 42-vertex `Icosphere`: no parent,
no vertex groups, no material slot. It comes in from the animation library,
and `add_animations.py` and `rig_and_animate.py` both already skip it — by
checking `o.name != 'Icosphere'`, which is precisely the kind of hardcoded
spelling this project has a rule against.
Asked by construction instead: a surface of the character is skinned to the
character. Anything with no vertex groups is not being deformed by the
skeleton, so whatever it is, it is not a body, a garment, hair or a worn
accessory — and it has no business in a table that says which of those a
surface is.
"""
return len(obj.vertex_groups) > 0
def backfill(glb_path):
"""Load a shipped skin, classify it, merge the table into its sidecar."""
import bpy
sidecar_path = os.path.splitext(glb_path)[0] + ".rig.json"
if not os.path.exists(sidecar_path):
raise SystemExit("no sidecar beside %s — run the pipeline first"
% glb_path)
with open(sidecar_path, "r", encoding="utf-8") as f:
sidecar = json.load(f)
bpy.ops.wm.read_factory_settings(use_empty=True)
bpy.ops.import_scene.gltf(filepath=glb_path)
meshes = [o for o in bpy.context.scene.objects
if o.type == "MESH" and _is_character_mesh(o)]
if not meshes:
raise SystemExit("no skinned meshes in %s" % glb_path)
surfaces = describe_surfaces(
meshes,
_chain_class_from_sidecar(sidecar),
sidecar.get("driven_bones", []),
_role_bone_names(sidecar))
sidecar["surfaces"] = surfaces
with open(sidecar_path, "w", encoding="utf-8") as f:
json.dump(sidecar, f, indent=1)
tally = {}
for s in surfaces:
tally[s["class"]] = tally.get(s["class"], 0) + 1
print("%s: %d surfaces — %s" % (
os.path.basename(glb_path), len(surfaces),
", ".join("%s x%d" % kv for kv in sorted(tally.items()))))
for s in surfaces:
print(" %-14s s%d %-30s %-10s %-14s %s" % (
s["mesh"][:14], s["surface"], s["material"][:30], s["class"],
s["detail"], s["why"]))
if __name__ == "__main__":
argv = sys.argv
argv = argv[argv.index("--") + 1:] if "--" in argv else []
if not argv:
print(__doc__)
sys.exit(1)
for path in argv:
backfill(path)