feat(rendering): implement spell visual effects with bone-tracked ribbons and particles

Add complete spell visual pipeline resolving the DBC chain
(Spell → SpellVisual → SpellVisualKit → SpellVisualEffectName → M2)
with precast/cast/impact phases, bone-attached positioning, and
automatic dual-hand mirroring.

Ribbon rendering fixes:
- Parse visibility track as uint8 (was read as float, suppressing
  all ribbon edges due to ~1.4e-45 failing the >0.5 check)
- Filter garbage emitters with bone=UINT_MAX unconditionally
- Guard against NaN spine positions from corrupt bone data
- Resolve ribbon textures via direct index, not textureLookup table
- Fall back to bone 0 when ribbon bone index is out of range

Particle rendering fixes:
- Reduce spell particle scale from 5x to 1.5x (was oversized)
- Exempt spell effect instances from position-based deduplication

Spell handler integration:
- Trigger precast visuals on SMSG_SPELL_START with server castTimeMs
- Trigger cast/impact visuals on SMSG_SPELL_GO
- Cancel precast visuals on cast interrupt/failure/movement

M2 classifier expansion:
- Add AmbientEmitterType enum for sound system integration
- Add 20+ foliage tokens, 4 spell effect tokens, isSmallFoliage flag
- Add markModelAsSpellEffect() to override disableAnimation

DBC layouts:
- Add SpellVisualID field to Spell.dbc for all expansion configs

Signed-off-by: Pavel Okhlopkov <pavel.okhlopkov@flant.com>

include/rendering/m2_model_classifier.hpp

@@ -7,6 +7,17 @@
 namespace wowee {
 namespace rendering {
 
+/// Ambient sound emitter type for doodad models (fire, water, etc.).
+enum class AmbientEmitterType : uint8_t {
+    None           = 0,
+    FireplaceSmall = 1, ///< Small fire / campfire
+    FireplaceLarge = 2, ///< Large brazier / bonfire
+    Torch          = 3, ///< Wall torch / standing torch
+    Fountain       = 4, ///< Fountain water loop
+    Waterfall      = 5, ///< Waterfall ambient
+    Forge          = 6, ///< Forge / anvil fire
+};
+
 /**
  * Output of classifyM2Model(): all name/geometry-based flags for an M2 model.
  * Pure data — no Vulkan, GPU, or asset-manager dependencies.
@@ -25,6 +36,7 @@ struct M2ClassificationResult {
 
     // --- Rendering / effect classification ---
     bool isFoliageLike      = false; ///< Foliage or tree (wind sway, disabled animation)
+    bool isSmallFoliage     = false; ///< Small bush/grass/plant (skip during taxi/flight)
     bool isSpellEffect      = false; ///< Spell effect / particle-dominated visual
     bool isLavaModel        = false; ///< Lava surface (UV scroll animation)
     bool isInstancePortal   = false; ///< Instance portal (additive, spin, no collision)
@@ -36,6 +48,12 @@ struct M2ClassificationResult {
     bool isGroundDetail     = false; ///< Ground-clutter detail doodad (always non-blocking)
     bool isInvisibleTrap    = false; ///< Event-object invisible trap (no render, no collision)
     bool isSmoke            = false; ///< Smoke model (UV scroll animation)
+    bool isWaterfall        = false; ///< Waterfall model (ambient sound + splash particles)
+    bool isBrazierOrFire    = false; ///< Brazier / campfire / bonfire model
+    bool isTorch            = false; ///< Wall-mounted or standing torch
+
+    // --- Ambient emitter type (for sound system) ---
+    AmbientEmitterType ambientEmitterType = AmbientEmitterType::None;
 
     // --- Animation flags ---
     bool disableAnimation   = false; ///< Keep visually stable (foliage, chest lids, etc.)
@@ -89,5 +107,18 @@ struct M2BatchTexClassification {
  */
 M2BatchTexClassification classifyBatchTexture(const std::string& lowerTexKey);
 
+// ---------------------------------------------------------------------------
+// Lightweight ambient emitter classification (name-only, no geometry needed)
+// ---------------------------------------------------------------------------
+
+/**
+ * Classify an M2 model path for ambient sound emitter type.
+ * Faster than the full classifyM2Model() when only the emitter type is needed.
+ *
+ * @param lowerName Lowercased model path/name
+ * @return AmbientEmitterType::None if the model is not an ambient emitter source
+ */
+AmbientEmitterType classifyAmbientEmitter(const std::string& lowerName);
+
 } // namespace rendering
 } // namespace wowee

include/rendering/m2_renderer.hpp

@@ -2,6 +2,7 @@
 
 #include "pipeline/m2_loader.hpp"
 #include "pipeline/blp_loader.hpp"
+#include "rendering/m2_model_classifier.hpp"
 #include <vulkan/vulkan.h>
 #include <vk_mem_alloc.h>
 #include <glm/glm.hpp>
@@ -78,11 +79,15 @@ struct M2ModelGPU {
     bool collisionTreeTrunk = false;
     bool collisionNoBlock = false;
     bool collisionStatue = false;
-    bool isSmallFoliage = false;  // Small foliage (bushes, grass, plants) - skip during taxi
-    bool isInvisibleTrap = false; // Invisible trap objects (don't render, no collision)
-    bool isGroundDetail = false;  // Ground clutter/detail doodads (special fallback render path)
+    bool isSmallFoliage = false;    // Small foliage (bushes, grass, plants) - skip during taxi
+    bool isInvisibleTrap = false;   // Invisible trap objects (don't render, no collision)
+    bool isGroundDetail = false;    // Ground clutter/detail doodads (special fallback render path)
     bool isWaterVegetation = false; // Cattails, reeds, kelp etc. near water (insect spawning)
     bool isFireflyEffect = false;   // Firefly/fireflies M2 (exempt from particle dampeners)
+    bool isWaterfall = false;       // Waterfall model (ambient sound + splash particles)
+    bool isBrazierOrFire = false;   // Brazier / campfire / bonfire model
+    bool isTorch = false;           // Wall-mounted or standing torch
+    AmbientEmitterType ambientEmitterType = AmbientEmitterType::None;
 
     // Collision mesh with spatial grid (from M2 bounding geometry)
     struct CollisionMesh {
@@ -282,6 +287,8 @@ public:
 
     bool hasModel(uint32_t modelId) const;
     bool loadModel(const pipeline::M2Model& model, uint32_t modelId);
+    /** Mark a loaded model as a spell effect (full-brightness particles, no collision). */
+    void markModelAsSpellEffect(uint32_t modelId);
 
     uint32_t createInstance(uint32_t modelId, const glm::vec3& position,
                             const glm::vec3& rotation = glm::vec3(0.0f),

include/rendering/spell_visual_system.hpp

@@ -12,14 +12,16 @@ namespace pipeline { class AssetManager; }
 namespace rendering {
 
 class M2Renderer;
+class Renderer;
+class CharacterRenderer;
 
 class SpellVisualSystem {
 public:
     SpellVisualSystem() = default;
     ~SpellVisualSystem() = default;
 
-    // Initialize with references to the M2 renderer (for model loading/instance spawning)
-    void initialize(M2Renderer* m2Renderer);
+    // Initialize with references to the M2 renderer and parent renderer
+    void initialize(M2Renderer* m2Renderer, Renderer* renderer);
     void shutdown();
 
     // Spawn a spell visual at a world position.
@@ -27,9 +29,17 @@ public:
     void playSpellVisual(uint32_t visualId, const glm::vec3& worldPosition,
                          bool useImpactKit = false);
 
+    // Spawn a precast visual effect at a world position.
+    // castTimeMs: server cast time in milliseconds (0 = use anim duration).
+    void playSpellVisualPrecast(uint32_t visualId, const glm::vec3& worldPosition,
+                                uint32_t castTimeMs = 0);
+
     // Advance lifetime timers and remove expired instances.
     void update(float deltaTime);
 
+    // Remove all active precast visual instances (cast canceled/interrupted).
+    void cancelAllPrecastVisuals();
+
     // Remove all active spell visual instances and reset caches.
     // Called on map change / combat reset.
     void reset();
@@ -40,14 +50,18 @@ private:
         uint32_t instanceId;
         float elapsed;
         float duration;  // per-instance lifetime in seconds (from M2 anim or default)
+        bool isPrecast;  // true for precast effects (removed on cancel/interrupt)
+        uint32_t attachmentId;  // character attachment point to track (0=none/static)
     };
 
     void loadSpellVisualDbc();
 
     M2Renderer* m2Renderer_ = nullptr;
+    Renderer* renderer_ = nullptr;
     pipeline::AssetManager* cachedAssetManager_ = nullptr;
 
     std::vector<SpellVisualInstance> activeSpellVisuals_;
+    std::unordered_map<uint32_t, std::string> spellVisualPrecastPath_; // visualId → precast M2 path
     std::unordered_map<uint32_t, std::string> spellVisualCastPath_;   // visualId → cast M2 path
     std::unordered_map<uint32_t, std::string> spellVisualImpactPath_; // visualId → impact M2 path
     std::unordered_map<std::string, uint32_t> spellVisualModelIds_;   // M2 path → M2Renderer modelId
@@ -56,6 +70,12 @@ private:
     bool spellVisualDbcLoaded_ = false;
     static constexpr float SPELL_VISUAL_MAX_DURATION = 5.0f;
     static constexpr float SPELL_VISUAL_DEFAULT_DURATION = 2.0f;
+
+    // Determine character attachment point from model path keywords
+    static uint32_t classifyAttachmentId(const std::string& modelPath);
+
+    // Apply height offset based on model path keywords (Hand → hands, Chest → chest, Base → ground)
+    static glm::vec3 applyEffectHeightOffset(const glm::vec3& basePos, const std::string& modelPath);
 };
 
 } // namespace rendering