Reorganize into role-based folders and consolidate art

Move every script and scene into role-based directories (actors/, systems/, ui/,
levels/, props/) and all raw art under art/ (grouped by role, snake_case,
Extract-Textures GLBs), dropping Blender version-suffix noise. Filenames are
snake_case (PascalCase reserved for class_name) to avoid case-insensitive
filesystem aliasing on the web/macOS targets. Routes the bull's hits through the
typed DamageEvent pipeline and wires the bull's abilities to the Fx library.
Updates CLAUDE.md's folder-layout overview to match.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CCyaJPTHCH9EDthpf4A5Sj

systems/crowd/animation_player.gd

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+extends AnimationPlayer
+
+
+func _ready() -> void:
+	speed_scale = randf_range(0.5, 1.5)
+	play("ArmatureAction")

systems/crowd/animation_player.gd.uid

@@ -0,0 +1 @@
+uid://b6gdjsr6fcwc2

systems/crowd/crowd_billboard.gdshader

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+shader_type spatial;
+// Flat crowd sprite. Each instance is oriented at build time to face the arena centre
+// (see crowd_billboards.gd) — NOT the camera — so spectators on different segments of
+// the ring face inward toward the action, like a real stand. Unshaded (the sheet was
+// baked with lighting), alpha-tested (no transparency sorting across hundreds of
+// quads), nearest-filtered for a crisp PS1 look that matches the ps1_filter effect.
+render_mode unshaded, cull_disabled, shadows_disabled, depth_draw_opaque;
+
+uniform sampler2D sheet : source_color, filter_nearest;
+uniform int hframes = 8;
+uniform float fps = 10.0;
+uniform float alpha_clip = 0.4;
+
+varying flat float v_frame;
+varying flat vec3 v_tint;
+
+void vertex() {
+	// Per-instance clap phase (0..1) and tint are packed into the MultiMesh custom data.
+	// The instance transform already carries the inward facing, so no billboard maths.
+	float phase = INSTANCE_CUSTOM.x;
+	v_tint  = INSTANCE_CUSTOM.yzw;
+	v_frame = floor(mod(TIME * fps + phase * float(hframes), float(hframes)));
+}
+
+void fragment() {
+	// Sheet is two rows: top = front, bottom = back. Show the back when the camera is
+	// behind the spectator (they're facing into the arena, away from us).
+	float u = (UV.x + v_frame) / float(hframes);
+	float v = UV.y * 0.5 + (FRONT_FACING ? 0.0 : 0.5);
+	vec4 c = texture(sheet, vec2(u, v));
+	if (c.a < alpha_clip) {
+		discard;
+	}
+	ALBEDO = c.rgb * v_tint;
+}

systems/crowd/crowd_billboard.gdshader.uid

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+uid://hkdivctavovb

systems/crowd/crowd_billboards.gd

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+extends MultiMeshInstance3D
+## A whole stand of cheering spectators rendered as flat billboards in a single draw
+## call — the performant replacement for dozens of skinned crowd skeletons. The sprite
+## sheet is baked from the existing crowd figure by tools/bake_crowd_sheet.gd.
+##
+## Placement comes from CrowdMarker nodes the designer drops into the level (collected
+## via the &"crowd_marker" group): each marker gives one spectator its world position and
+## a chosen facing (one of six 60°-spaced headings). If no markers are present the scene
+## falls back to a generated tribune so it still populates.
+
+const SHEET_PATH  := "res://art/textures/crowd_clap_sheet.png"
+const SHADER_PATH := "res://systems/crowd/crowd_billboard.gdshader"
+
+## World height of a spectator billboard, in metres. Sheet aspect sets the width.
+@export var figure_height: float = 2.0
+@export var frames: int = 8
+@export var clap_fps: float = 10.0
+## Subtle per-spectator brightness spread so the crowd doesn't read as clones.
+@export_range(0.0, 0.5) var tint_variation: float = 0.18
+
+# Fallback tribune (used only when source_path resolves to nothing) — concentric arcs
+# of seats ringing the arena.
+@export_group("Fallback stand")
+@export var fallback_count: int = 120
+@export var fallback_inner_radius: float = 26.0
+@export var fallback_rows: int = 6
+@export var fallback_row_rise: float = 1.6
+@export var fallback_row_step: float = 2.2
+@export var fallback_seat_step: float = 2.4
+
+var _rng := RandomNumberGenerator.new()
+
+
+func _ready() -> void:
+	_rng.seed = hash("bullosseum-crowd")   # deterministic layout/phases across runs
+	# Deferred so every CrowdMarker has run _ready and joined the group before we harvest.
+	_build.call_deferred()
+
+
+func _build() -> void:
+	var sheet := load(SHEET_PATH) as Texture2D
+	if sheet == null:
+		push_warning("crowd_billboards: missing sheet %s — run tools/bake_crowd_sheet.gd" % SHEET_PATH)
+		return
+
+	# Sheet holds `frames` columns and 2 rows (front / back), so a cell is half-height.
+	var aspect := (float(sheet.get_width()) / float(frames)) / (float(sheet.get_height()) / 2.0)
+	var quad := QuadMesh.new()
+	quad.size = Vector2(figure_height * aspect, figure_height)
+	quad.center_offset = Vector3(0.0, figure_height * 0.5, 0.0)   # pivot at the feet
+
+	var mat := ShaderMaterial.new()
+	mat.shader = load(SHADER_PATH) as Shader
+	mat.set_shader_parameter("sheet", sheet)
+	mat.set_shader_parameter("hframes", frames)
+	mat.set_shader_parameter("fps", clap_fps)
+	material_override = mat
+
+	# Each seat is a (global feet-position, unit forward) pair.
+	var positions := PackedVector3Array()
+	var facings: Array[Vector3] = []
+	_collect_seats(positions, facings)
+
+	var mm := MultiMesh.new()
+	mm.transform_format = MultiMesh.TRANSFORM_3D
+	mm.use_custom_data = true
+	mm.mesh = quad
+	mm.instance_count = positions.size()
+
+	for i in positions.size():
+		var s := 1.0 + _rng.randf_range(-0.06, 0.06)          # slight height variety
+		mm.set_instance_transform(i, Transform3D(_upright_basis(facings[i], s), positions[i]))
+		var b := 1.0 + _rng.randf_range(-tint_variation, tint_variation)
+		mm.set_instance_custom_data(i, Color(_rng.randf(), b, b * 0.99, b * 0.98))
+	multimesh = mm
+
+
+# Upright basis whose forward (+Z, the quad's face) points along `look`, uniformly
+# scaled by `s`. World +Y stays up so spectators never tilt.
+func _upright_basis(look: Vector3, s: float) -> Basis:
+	look.y = 0.0
+	look = look.normalized() if look.length() > 0.001 else Vector3(0.0, 0.0, 1.0)
+	var up := Vector3.UP
+	var basis := Basis()
+	basis.x = up.cross(look).normalized()
+	basis.y = up
+	basis.z = look
+	return basis.scaled(Vector3.ONE * s)
+
+
+# Seats from designer-placed CrowdMarker nodes: each contributes its world position and
+# its chosen 60°-spaced facing. With no markers present, fall back to a generated ring
+# that faces inward so the scene still shows a crowd.
+func _collect_seats(positions: PackedVector3Array, facings: Array[Vector3]) -> void:
+	for node in get_tree().get_nodes_in_group(&"crowd_marker"):
+		var marker := node as Node3D
+		if marker == null or not marker.has_method(&"facing_dir"):
+			continue
+		positions.append(marker.global_position)
+		facings.append(marker.facing_dir())
+	if positions.is_empty():
+		_fallback_stand(positions, facings)
+
+
+func _fallback_stand(positions: PackedVector3Array, facings: Array[Vector3]) -> void:
+	var placed := 0
+	for row in fallback_rows:
+		var radius := fallback_inner_radius + float(row) * fallback_row_step
+		var y := float(row) * fallback_row_rise
+		var circumference := TAU * radius
+		var seats_in_row := int(circumference / fallback_seat_step)
+		for s in seats_in_row:
+			if placed >= fallback_count:
+				return
+			var ang := TAU * float(s) / float(seats_in_row)
+			var pos := Vector3(cos(ang) * radius, y, sin(ang) * radius)
+			positions.append(pos)
+			facings.append(-pos)   # face the ring centre (origin)
+			placed += 1

systems/crowd/crowd_billboards.gd.uid

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+uid://cj0ytlkuavmf4

systems/crowd/crowd_marker.gd

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+@tool
+extends Node3D
+class_name CrowdMarker
+## A designer-placed spot for one billboard spectator. Drop these into a level in the
+## editor; crowd_billboards.gd harvests every marker (via the &"crowd_marker" group) into
+## its MultiMesh at runtime, using each marker's global position and chosen facing.
+##
+## The marker draws a lightweight preview (a slab standing in for the sprite + a forward
+## arrow) so its position and orientation are visible in the viewport. That preview is
+## editor-only and never serialised into the scene, so it costs nothing at runtime.
+
+## The six selectable facings, one every 60° about the Y axis. DEG_0 faces the quad's
+## front (+Z) along world +Z; increasing values rotate clockwise looking down.
+enum Orientation {
+	DEG_0,
+	DEG_60,
+	DEG_120,
+	DEG_180,
+	DEG_240,
+	DEG_300,
+}
+
+const ORIENTATION_STEPS := 6
+## Metres — matches crowd_billboards.figure_height so the editor preview reads true to scale.
+const PREVIEW_HEIGHT := 2.0
+
+@export var orientation := Orientation.DEG_0:
+	set(value):
+		orientation = value
+		_apply_orientation()
+
+var _preview: Node3D
+
+
+func _ready() -> void:
+	add_to_group(&"crowd_marker")
+	if Engine.is_editor_hint():
+		_build_preview()
+		_apply_orientation()
+
+
+# Facing about Y for the current orientation: 0, 60, 120 … degrees as radians.
+func facing_yaw() -> float:
+	return float(orientation) * (TAU / float(ORIENTATION_STEPS))
+
+
+# Unit forward the spectator's front (+Z) points along, on the horizontal plane.
+func facing_dir() -> Vector3:
+	var a := facing_yaw()
+	return Vector3(sin(a), 0.0, cos(a))
+
+
+func _apply_orientation() -> void:
+	if _preview != null:
+		_preview.rotation = Vector3(0.0, facing_yaw(), 0.0)
+
+
+# Editor-only preview. Children are added without an owner so they are excluded from the
+# saved .tscn (Godot only serialises nodes owned by the scene root).
+func _build_preview() -> void:
+	_preview = Node3D.new()
+	add_child(_preview)
+
+	var aspect := 0.5
+	var slab := MeshInstance3D.new()
+	var quad := QuadMesh.new()
+	quad.size = Vector2(PREVIEW_HEIGHT * aspect, PREVIEW_HEIGHT)
+	quad.center_offset = Vector3(0.0, PREVIEW_HEIGHT * 0.5, 0.0)   # stand on the marker
+	slab.mesh = quad
+	slab.material_override = _preview_material(Color(0.3, 0.7, 1.0, 0.35))
+	_preview.add_child(slab)
+
+	var arrow := MeshInstance3D.new()
+	var shaft := BoxMesh.new()
+	shaft.size = Vector3(0.08, 0.08, PREVIEW_HEIGHT * 0.5)
+	arrow.mesh = shaft
+	# Push the shaft out along +Z (the facing) and up to chest height.
+	arrow.position = Vector3(0.0, PREVIEW_HEIGHT * 0.5, PREVIEW_HEIGHT * 0.25)
+	arrow.material_override = _preview_material(Color(1.0, 0.85, 0.2, 0.9))
+	_preview.add_child(arrow)
+
+
+func _preview_material(col: Color) -> StandardMaterial3D:
+	var mat := StandardMaterial3D.new()
+	mat.albedo_color = col
+	mat.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
+	mat.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA
+	mat.cull_mode = BaseMaterial3D.CULL_DISABLED
+	return mat

systems/crowd/crowd_marker.gd.uid

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+uid://70j3ks1emhkd

systems/crowd/publikum_controller.gd

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+extends Node3D
+
+
+func _ready() -> void:
+	# Mark the crowd so debug overlays (show_animation_name / show_bones) skip it —
+	# 72 ambient clapping spectators would otherwise flood the view with tags.
+	add_to_group(&"public")
+	for child in get_children():
+		var anim := child.get_node_or_null(^"AnimationPlayer") as AnimationPlayer
+		if anim:
+			anim.speed_scale = randf_range(0.5, 1.5)
+			anim.play(&"ArmatureAction")

systems/crowd/publikum_controller.gd.uid

@@ -0,0 +1 @@
+uid://bs682ey3p1ivj