feat: create item variants

src/core/config/ItemVariants.ts

@@ -0,0 +1,177 @@
+import type { ItemType } from "../types";
+
+// =============================================================================
+// Variant Stat Modifiers
+// =============================================================================
+
+export type VariantStatModifiers = Partial<{
+  defense: number;
+  attack: number;
+  speed: number;
+  maxHp: number;
+  critChance: number;
+  critMultiplier: number;
+  accuracy: number;
+  evasion: number;
+  blockChance: number;
+  lifesteal: number;
+  luck: number;
+  // Consumable-specific multiplier
+  effectMultiplier: number;
+}>;
+
+export interface ItemVariant {
+  prefix: string;
+  glowColor: number;
+  statModifiers: VariantStatModifiers;
+  applicableTo: ItemType[];
+}
+
+// =============================================================================
+// Armour Variants
+// =============================================================================
+
+export const ARMOUR_VARIANTS = {
+  heavy: {
+    prefix: "Heavy",
+    glowColor: 0x4488ff, // Blue
+    statModifiers: { defense: 2, speed: -1 },
+    applicableTo: ["BodyArmour", "Helmet", "Gloves", "Boots"] as ItemType[],
+  },
+  light: {
+    prefix: "Light",
+    glowColor: 0x44ff88, // Green
+    statModifiers: { speed: 1, evasion: 5, defense: -1 },
+    applicableTo: ["BodyArmour", "Helmet", "Gloves", "Boots"] as ItemType[],
+  },
+  reinforced: {
+    prefix: "Reinforced",
+    glowColor: 0xcccccc, // Silver
+    statModifiers: { defense: 1, blockChance: 5 },
+    applicableTo: ["BodyArmour", "Helmet", "Gloves", "Boots"] as ItemType[],
+  },
+  blessed: {
+    prefix: "Blessed",
+    glowColor: 0xffd700, // Gold
+    statModifiers: { maxHp: 5, defense: 1 },
+    applicableTo: ["BodyArmour", "Helmet", "Gloves", "Boots"] as ItemType[],
+  },
+  cursed: {
+    prefix: "Cursed",
+    glowColor: 0x8844ff, // Purple
+    statModifiers: { defense: 3, luck: -10 },
+    applicableTo: ["BodyArmour", "Helmet", "Gloves", "Boots"] as ItemType[],
+  },
+  spiked: {
+    prefix: "Spiked",
+    glowColor: 0xff4444, // Red
+    statModifiers: { attack: 1, defense: 1 },
+    applicableTo: ["BodyArmour", "Helmet", "Gloves", "Boots"] as ItemType[],
+  },
+} as const;
+
+// =============================================================================
+// Weapon Variants
+// =============================================================================
+
+export const WEAPON_VARIANTS = {
+  sharp: {
+    prefix: "Sharp",
+    glowColor: 0xffffff, // White
+    statModifiers: { attack: 2, critChance: 5 },
+    applicableTo: ["Weapon"] as ItemType[],
+  },
+  heavy_weapon: {
+    prefix: "Heavy",
+    glowColor: 0x4488ff, // Blue
+    statModifiers: { attack: 3, speed: -1 },
+    applicableTo: ["Weapon"] as ItemType[],
+  },
+  balanced: {
+    prefix: "Balanced",
+    glowColor: 0x44ffff, // Cyan
+    statModifiers: { attack: 1, accuracy: 10 },
+    applicableTo: ["Weapon"] as ItemType[],
+  },
+  venomous: {
+    prefix: "Venomous",
+    glowColor: 0x88ff44, // Toxic green
+    statModifiers: { attack: 1 },
+    applicableTo: ["Weapon"] as ItemType[],
+  },
+  vampiric: {
+    prefix: "Vampiric",
+    glowColor: 0xcc2222, // Crimson
+    statModifiers: { lifesteal: 5 },
+    applicableTo: ["Weapon"] as ItemType[],
+  },
+  brutal: {
+    prefix: "Brutal",
+    glowColor: 0xff8844, // Orange
+    statModifiers: { critMultiplier: 0.5 },
+    applicableTo: ["Weapon"] as ItemType[],
+  },
+} as const;
+
+// =============================================================================
+// Consumable Variants
+// =============================================================================
+
+export const CONSUMABLE_VARIANTS = {
+  potent: {
+    prefix: "Potent",
+    glowColor: 0xff6644, // Red-orange
+    statModifiers: { effectMultiplier: 1.5 },
+    applicableTo: ["Consumable"] as ItemType[],
+  },
+  diluted: {
+    prefix: "Diluted",
+    glowColor: 0xaaaaaa, // Pale gray
+    statModifiers: { effectMultiplier: 0.5 },
+    applicableTo: ["Consumable"] as ItemType[],
+  },
+  enchanted: {
+    prefix: "Enchanted",
+    glowColor: 0xff44ff, // Magenta
+    statModifiers: { effectMultiplier: 2 },
+    applicableTo: ["Consumable"] as ItemType[],
+  },
+} as const;
+
+// =============================================================================
+// Combined Variant Lookup
+// =============================================================================
+
+export const ALL_VARIANTS = {
+  ...ARMOUR_VARIANTS,
+  ...WEAPON_VARIANTS,
+  ...CONSUMABLE_VARIANTS,
+} as const;
+
+export type ArmourVariantId = keyof typeof ARMOUR_VARIANTS;
+export type WeaponVariantId = keyof typeof WEAPON_VARIANTS;
+export type ConsumableVariantId = keyof typeof CONSUMABLE_VARIANTS;
+export type ItemVariantId = keyof typeof ALL_VARIANTS;
+
+// =============================================================================
+// Helper Functions
+// =============================================================================
+
+export function getVariant(variantId: ItemVariantId): ItemVariant {
+  return ALL_VARIANTS[variantId];
+}
+
+export function getVariantGlowColor(variantId: ItemVariantId): number {
+  return ALL_VARIANTS[variantId].glowColor;
+}
+
+export function isVariantApplicable(variantId: ItemVariantId, itemType: ItemType): boolean {
+  const variant = ALL_VARIANTS[variantId];
+  return variant.applicableTo.includes(itemType);
+}
+
+export function getApplicableVariants(itemType: ItemType): ItemVariantId[] {
+  return (Object.keys(ALL_VARIANTS) as ItemVariantId[]).filter(
+    (id) => isVariantApplicable(id, itemType)
+  );
+}

src/core/config/Items.ts

@@ -94,36 +94,66 @@ export type ItemTemplateId = keyof typeof ALL_TEMPLATES;
 // Factory Functions
 // =============================================================================
 
-export function createConsumable(id: ConsumableId, quantity = 1): ConsumableItem {
+import { 
+  ALL_VARIANTS, 
+  type ArmourVariantId,
+  type WeaponVariantId,
+  type ConsumableVariantId
+} from "./ItemVariants";
+
+export function createConsumable(
+  id: ConsumableId, 
+  quantity = 1, 
+  variant?: ConsumableVariantId
+): ConsumableItem {
   const t = CONSUMABLES[id];
+  const v = variant ? ALL_VARIANTS[variant] : null;
+  
+  // Apply effect multiplier for consumables
+  const effectMult = v?.statModifiers.effectMultiplier ?? 1;
+  const baseHealAmount = "healAmount" in t ? t.healAmount : undefined;
+  const finalHealAmount = baseHealAmount ? Math.floor(baseHealAmount * effectMult) : undefined;
+  
+  const name = v ? `${v.prefix} ${t.name}` : t.name;
+  
   return {
     id,
-    name: t.name,
+    name,
     type: "Consumable",
     textureKey: t.textureKey,
     spriteIndex: t.spriteIndex,
     stackable: t.stackable ?? false,
     quantity,
+    variant,
     stats: {
-      hp: "healAmount" in t ? t.healAmount : undefined,
+      hp: finalHealAmount,
       attack: "attack" in t ? t.attack : undefined,
     },
     throwable: "throwable" in t ? t.throwable : undefined,
   };
 }
 
-export function createRangedWeapon(id: RangedWeaponId): RangedWeaponItem {
+export function createRangedWeapon(
+  id: RangedWeaponId, 
+  variant?: WeaponVariantId
+): RangedWeaponItem {
   const t = RANGED_WEAPONS[id];
+  const v = variant ? ALL_VARIANTS[variant] : null;
+  
+  const name = v ? `${v.prefix} ${t.name}` : t.name;
+  const attackBonus = (v?.statModifiers as { attack?: number })?.attack ?? 0;
+  
   return {
     id,
-    name: t.name,
+    name,
     type: "Weapon",
     weaponType: "ranged",
     textureKey: t.textureKey,
     spriteIndex: t.spriteIndex,
     currentAmmo: t.magazineSize,
+    variant,
     stats: {
-      attack: t.attack,
+      attack: t.attack + attackBonus,
       range: t.range,
       magazineSize: t.magazineSize,
       ammoType: t.ammoType,
@@ -133,17 +163,26 @@ export function createRangedWeapon(id: RangedWeaponId): RangedWeaponItem {
   };
 }
 
-export function createMeleeWeapon(id: MeleeWeaponId): MeleeWeaponItem {
+export function createMeleeWeapon(
+  id: MeleeWeaponId,
+  variant?: WeaponVariantId
+): MeleeWeaponItem {
   const t = MELEE_WEAPONS[id];
+  const v = variant ? ALL_VARIANTS[variant] : null;
+  
+  const name = v ? `${v.prefix} ${t.name}` : t.name;
+  const attackBonus = (v?.statModifiers as { attack?: number })?.attack ?? 0;
+  
   return {
     id,
-    name: t.name,
+    name,
     type: "Weapon",
     weaponType: "melee",
     textureKey: t.textureKey,
     spriteIndex: t.spriteIndex,
+    variant,
     stats: {
-      attack: t.attack,
+      attack: t.attack + attackBonus,
     },
   };
 }
@@ -162,19 +201,29 @@ export function createAmmo(id: AmmoId, quantity = 10): AmmoItem {
   };
 }
 
-export function createArmour(id: ArmourId): ArmourItem {
+export function createArmour(
+  id: ArmourId, 
+  variant?: ArmourVariantId
+): ArmourItem {
   const t = ARMOUR[id];
+  const v = variant ? ALL_VARIANTS[variant] : null;
+  
+  const name = v ? `${v.prefix} ${t.name}` : t.name;
+  const defenseBonus = v?.statModifiers.defense ?? 0;
+  
   return {
     id,
-    name: t.name,
+    name,
     type: "BodyArmour",
     textureKey: t.textureKey,
     spriteIndex: t.spriteIndex,
+    variant,
     stats: {
-      defense: t.defense,
+      defense: t.defense + defenseBonus,
     },
   };
 }
 
 // Legacy export for backward compatibility during migration
 export const ITEMS = ALL_TEMPLATES;
+

src/core/types.ts

@@ -85,6 +85,7 @@ export interface BaseItem {
   spriteIndex: number;
   quantity?: number;
   stackable?: boolean;
+  variant?: string; // ItemVariantId - stored as string to avoid circular imports
 }
 
 export interface MeleeWeaponItem extends BaseItem {

src/engine/world/generator.ts

@@ -59,10 +59,10 @@ export function generateWorld(floor: number, runState: RunState): { world: World
         // Add starting items for testing if empty
         ...(runState.inventory.items.length === 0 ? [
           createConsumable("health_potion", 2),
-          createMeleeWeapon("iron_sword"),
+          createMeleeWeapon("iron_sword", "sharp"),  // Sharp sword variant
           createConsumable("throwing_dagger", 3),
           createRangedWeapon("pistol"),
-          createArmour("leather_armor")
+          createArmour("leather_armor", "heavy")  // Heavy armour variant
         ] : [])
       ] 
     },

src/rendering/DungeonRenderer.ts

@@ -7,6 +7,7 @@ import { ALL_TEMPLATES } from "../core/config/Items";
 import { FovManager } from "./FovManager";
 import { MinimapRenderer } from "./MinimapRenderer";
 import { FxRenderer } from "./FxRenderer";
+import { ItemSpriteFactory } from "./ItemSpriteFactory";
 
 export class DungeonRenderer {
   private scene: Phaser.Scene;
@@ -16,7 +17,7 @@ export class DungeonRenderer {
   private playerSprite?: Phaser.GameObjects.Sprite;
   private enemySprites: Map<EntityId, Phaser.GameObjects.Sprite> = new Map();
   private orbSprites: Map<EntityId, Phaser.GameObjects.Arc> = new Map();
-  private itemSprites: Map<EntityId, Phaser.GameObjects.Sprite> = new Map();
+  private itemSprites: Map<EntityId, Phaser.GameObjects.Container> = new Map();
 
   private fovManager: FovManager;
   private minimapRenderer: MinimapRenderer;
@@ -228,19 +229,20 @@ export class DungeonRenderer {
           if (!isVis) continue;
           
           activeItemIds.add(a.id);
-          let itemSprite = this.itemSprites.get(a.id);
-          if (!itemSprite) {
-              itemSprite = this.scene.add.sprite(0, 0, a.item.textureKey, a.item.spriteIndex);
-              itemSprite.setDepth(40);
-              this.itemSprites.set(a.id, itemSprite);
+          let itemContainer = this.itemSprites.get(a.id);
+          if (!itemContainer) {
+              // Use ItemSpriteFactory to create sprite with optional glow
+              itemContainer = ItemSpriteFactory.createItemSprite(this.scene, a.item, 0, 0, 1);
+              itemContainer.setDepth(40);
+              this.itemSprites.set(a.id, itemContainer);
           }
           const tx = a.pos.x * TILE_SIZE + TILE_SIZE / 2;
           const ty = a.pos.y * TILE_SIZE + TILE_SIZE / 2;
-          itemSprite.setPosition(tx, ty);
-          itemSprite.setVisible(true);
+          itemContainer.setPosition(tx, ty);
+          itemContainer.setVisible(true);
           
-          // bobbing effect?
-          itemSprite.y += Math.sin(this.scene.time.now / 300) * 2; 
+          // bobbing effect on the container
+          itemContainer.y += Math.sin(this.scene.time.now / 300) * 2; 
       }
     }
 

src/rendering/ItemSpriteFactory.ts

@@ -0,0 +1,118 @@
+import Phaser from "phaser";
+import type { Item } from "../core/types";
+import { ALL_VARIANTS, type ItemVariantId } from "../core/config/ItemVariants";
+
+/**
+ * Factory for creating item sprites with optional variant glow effects.
+ * Centralizes item rendering logic to ensure consistent glow styling across
+ * inventory, quick slots, and world drops.
+ */
+export class ItemSpriteFactory {
+  
+  /**
+   * Creates an item sprite with optional glow effect for variants.
+   * Returns a container with the glow (if applicable) and main sprite.
+   */
+  static createItemSprite(
+    scene: Phaser.Scene,
+    item: Item,
+    x: number,
+    y: number,
+    scale: number = 1
+  ): Phaser.GameObjects.Container {
+    const container = scene.add.container(x, y);
+    
+    // Create glow effect if item has a variant
+    if (item.variant) {
+      const glowColor = this.getGlowColor(item.variant as ItemVariantId);
+      if (glowColor !== null) {
+        const glow = this.createGlow(scene, item, scale, glowColor);
+        container.add(glow);
+      }
+    }
+    
+    // Create main item sprite
+    const sprite = scene.add.sprite(0, 0, item.textureKey, item.spriteIndex);
+    sprite.setScale(scale);
+    container.add(sprite);
+    
+    return container;
+  }
+  
+  /**
+   * Creates just a sprite (no container) for simpler use cases like drag icons.
+   * Does not include glow - use createItemSprite for full effect.
+   */
+  static createSimpleSprite(
+    scene: Phaser.Scene,
+    item: Item,
+    x: number,
+    y: number,
+    scale: number = 1
+  ): Phaser.GameObjects.Sprite {
+    const sprite = scene.add.sprite(x, y, item.textureKey, item.spriteIndex);
+    sprite.setScale(scale);
+    return sprite;
+  }
+  
+  /**
+   * Creates a soft glow effect behind the item using graphics.
+   * Uses a radial gradient-like effect with multiple circles.
+   */
+  private static createGlow(
+    scene: Phaser.Scene,
+    _item: Item,
+    scale: number,
+    color: number
+  ): Phaser.GameObjects.Graphics {
+    const glow = scene.add.graphics();
+    
+    // Base size for the glow (16x16 sprite scaled)
+    const baseSize = 16 * scale;
+    const glowRadius = baseSize * 0.8;
+    
+    // Extract RGB from hex color
+    const r = (color >> 16) & 0xff;
+    const g = (color >> 8) & 0xff;
+    const b = color & 0xff;
+    
+    // Draw multiple circles with decreasing alpha for soft glow effect
+    const layers = 5;
+    for (let i = layers; i >= 1; i--) {
+      const layerRadius = glowRadius * (i / layers) * 1.2;
+      const layerAlpha = 0.15 * (1 - (i - 1) / layers);
+      
+      glow.fillStyle(Phaser.Display.Color.GetColor(r, g, b), layerAlpha);
+      glow.fillCircle(0, 0, layerRadius);
+    }
+    
+    // Add pulsing animation to the glow
+    scene.tweens.add({
+      targets: glow,
+      alpha: { from: 0.7, to: 1.0 },
+      scaleX: { from: 0.9, to: 1.1 },
+      scaleY: { from: 0.9, to: 1.1 },
+      duration: 800,
+      yoyo: true,
+      repeat: -1,
+      ease: 'Sine.easeInOut'
+    });
+    
+    return glow;
+  }
+  
+  /**
+   * Gets the glow color for a variant.
+   */
+  private static getGlowColor(variantId: ItemVariantId): number | null {
+    const variant = ALL_VARIANTS[variantId];
+    return variant?.glowColor ?? null;
+  }
+  
+  /**
+   * Checks if an item has a variant with a glow.
+   */
+  static hasGlow(item: Item): boolean {
+    return !!item.variant && !!ALL_VARIANTS[item.variant as ItemVariantId];
+  }
+}

src/ui/components/InventoryOverlay.ts

@@ -1,6 +1,7 @@
 import Phaser from "phaser";
 import { OverlayComponent } from "./OverlayComponent";
 import { type CombatantActor } from "../../core/types";
+import { ItemSpriteFactory } from "../../rendering/ItemSpriteFactory";
 
 export class InventoryOverlay extends OverlayComponent {
   private equipmentSlots: Map<string, Phaser.GameObjects.Container> = new Map();
@@ -330,13 +331,9 @@ export class InventoryOverlay extends OverlayComponent {
 
       const slot = this.backpackSlots[index];
       
-      const texture = item.textureKey;
-      const frame = item.spriteIndex;
-      
-      const sprite = this.scene.add.sprite(0, 0, texture, frame);
-      sprite.setScale(2.2); // Scale to fit nicely in 44px slots
-      
-      slot.add(sprite);
+      // Use ItemSpriteFactory for glow effect on variants
+      const itemContainer = ItemSpriteFactory.createItemSprite(this.scene, item, 0, 0, 2.2);
+      slot.add(itemContainer);
 
       // Add Count Label (Bottom-Right)
       let labelText = "";
@@ -384,9 +381,9 @@ export class InventoryOverlay extends OverlayComponent {
         const slot = this.equipmentSlots.get(key);
         if (!slot) return;
 
-        const sprite = this.scene.add.sprite(0, 0, item.textureKey, item.spriteIndex);
-        sprite.setScale(2.2);
-        slot.add(sprite);
+        // Use ItemSpriteFactory for glow effect on variants
+        const itemContainer = ItemSpriteFactory.createItemSprite(this.scene, item, 0, 0, 2.2);
+        slot.add(itemContainer);
 
         // Add interactivity
         const size = (key === "bodyArmour") ? 58 : (key === "belt") ? 32 : (key === "boots") ? 46 : (key.startsWith("ring")) ? 38 : 46;

src/ui/components/QuickSlotComponent.ts

@@ -1,5 +1,6 @@
 import Phaser from "phaser";
 import type { CombatantActor, Item } from "../../core/types";
+import { ItemSpriteFactory } from "../../rendering/ItemSpriteFactory";
 
 export class QuickSlotComponent {
   private scene: Phaser.Scene;
@@ -220,11 +221,11 @@ export class QuickSlotComponent {
               bgGraphics.strokeRect(0, 0, slotSize, slotSize);
 
                 if (foundItem) {
-                    const texture = foundItem.textureKey ?? "items";
-                    const sprite = this.scene.add.sprite(slotSize / 2, slotSize / 2, texture, foundItem.spriteIndex);
-                    // PD items are 16x16, slot is 48x48. Scale up slightly
-                    sprite.setScale(2.5); 
-                    slot.add(sprite);
+                    // Use ItemSpriteFactory for glow effect on variants
+                    const itemContainer = ItemSpriteFactory.createItemSprite(
+                        this.scene, foundItem, slotSize / 2, slotSize / 2, 2.5
+                    );
+                    slot.add(itemContainer);
 
                     // Unified Label (Bottom-Right)
                     let labelText = "";