Adding tons of new functionality

Decals, ghost textures, placement functionality, builder stub ins, a new camera system,  and more.

Assets/_Project/Scripts/Towers/TowerDefinition.cs

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+using UnityEngine;
+
+namespace TD.Towers
+{
+    /// <summary>
+    /// Data definition for a single tower type. One asset per tower type; shared across all
+    /// instances of that tower in a match. Consumed by tower placement, construction, and
+    /// (eventually) combat systems.
+    /// </summary>
+    /// <remarks>
+    /// TowerDefinitions are authored as ScriptableObject assets and referenced by
+    /// <see cref="RaceDefinition"/> (tower roster) and <see cref="TowerInstance"/> (which
+    /// definition this placed tower corresponds to). Clients load the full asset locally
+    /// from the project's ScriptableObject pool; only the asset reference (not the full data)
+    /// is replicated over the network.
+    ///
+    /// Fields marked STUBBED are defined here to lock in the data shape but are not yet
+    /// consumed by any runtime system. They will be wired in during the sessions noted.
+    /// </remarks>
+    [CreateAssetMenu(fileName = "TowerDefinition", menuName = "TD/Tower Definition", order = 2)]
+    public class TowerDefinition : ScriptableObject
+    {
+        // -------------------------------------------------------------------
+        // Identity
+        // -------------------------------------------------------------------
+
+        [Header("Identity")]
+        [Tooltip("Human-readable name shown in the HUD tower grid and context panel.")]
+        public string DisplayName;
+
+        [Tooltip("Short description shown in the HUD context panel when this tower is selected.")]
+        [TextArea(2, 4)]
+        public string Description;
+
+        // -------------------------------------------------------------------
+        // Placement
+        // -------------------------------------------------------------------
+
+        [Header("Placement")]
+        [Tooltip("Footprint size in tiles. Default 2×2. The anchor tile is the south-west corner " +
+                 "of the footprint (minimum x, minimum y). Every tile in the footprint must be " +
+                 "Buildable and owned by the placing player for placement to succeed.")]
+        public Vector2Int FootprintSize = new Vector2Int(2, 2);
+
+        [Tooltip("Gold cost to place this tower. Deducted from the placing player's pool on " +
+                 "successful server-side placement validation.")]
+        public int GoldCost;
+
+        // -------------------------------------------------------------------
+        // Construction
+        // -------------------------------------------------------------------
+
+        [Header("Construction")]
+        [Tooltip("STUBBED — not consumed until Path D (Builder system). " +
+                 "Time in seconds from construction start to tower becoming active. " +
+                 "A Builder must be within build range for construction to proceed. " +
+                 "Set to 0 for instant construction (placeholder behaviour during Path B testing).")]
+        public float BuildTime = 0f;
+
+        // -------------------------------------------------------------------
+        // Visuals
+        // -------------------------------------------------------------------
+
+        [Header("Visuals")]
+        [Tooltip("Prefab instantiated in the world when this tower is placed. Must have a " +
+                 "TowerInstance component at its root. During Path B this is a colored cube; " +
+                 "replace with a real mesh when art is available.")]
+        public GameObject TowerPrefab;
+
+        // -------------------------------------------------------------------
+        // Combat — STUBBED
+        // -------------------------------------------------------------------
+
+        [Header("Combat (Stubbed — not consumed until combat system is implemented)")]
+        [Tooltip("STUBBED. Damage dealt per hit to a single target.")]
+        public float Damage;
+
+        [Tooltip("STUBBED. Attack range in world units. Enemies within this radius are targetable.")]
+        public float Range;
+
+        [Tooltip("STUBBED. Attacks per second.")]
+        public float FireRate;
+
+        [Tooltip("STUBBED. Radius of splash damage around the impact point. 0 = single target.")]
+        public float SplashRadius;
+
+        [Tooltip("STUBBED. Fraction by which enemy movement speed is multiplied on hit. " +
+                 "1.0 = no slow. 0.5 = 50% slow.")]
+        [Range(0f, 1f)]
+        public float SlowFactor = 1f;
+
+        [Tooltip("STUBBED. Projectile prefab fired at targets. Null = hitscan (instant hit, no " +
+                 "projectile travel).")]
+        public GameObject ProjectilePrefab;
+    }
+}

Assets/_Project/Scripts/Towers/TowerDefinition.cs.meta

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+fileFormatVersion: 2
+guid: 7b353a757b6e6774d97e6fb8ba138fcc