Add ability to clean patch caches

Source/Engine/Terrain/TerrainPatch.cpp

@@ -1125,42 +1125,67 @@ bool TerrainPatch::InitializeHeightMap()
 
 float* TerrainPatch::GetHeightmapData()
 {
+    PROFILE_CPU_NAMED("Terrain.GetHeightmapData");
+
     if (_cachedHeightMap.HasItems())
         return _cachedHeightMap.Get();
 
-    PROFILE_CPU_NAMED("Terrain.GetHeightmapData");
-
     CacheHeightData();
 
     return _cachedHeightMap.Get();
 }
 
+void TerrainPatch::ClearHeightmapCache()
+{
+    PROFILE_CPU_NAMED("Terrain.ClearHeightmapCache");
+    _cachedHeightMap.Clear();
+}
+
 byte* TerrainPatch::GetHolesMaskData()
 {
+    PROFILE_CPU_NAMED("Terrain.GetHolesMaskData");
+
     if (_cachedHolesMask.HasItems())
         return _cachedHolesMask.Get();
 
-    PROFILE_CPU_NAMED("Terrain.GetHolesMaskData");
-
     CacheHeightData();
 
     return _cachedHolesMask.Get();
 }
 
+void TerrainPatch::ClearHolesMaskCache()
+{
+    PROFILE_CPU_NAMED("Terrain.ClearHolesMaskCache");
+    _cachedHolesMask.Clear();
+}
+
 Color32* TerrainPatch::GetSplatMapData(int32 index)
 {
     ASSERT(index >= 0 && index < TERRAIN_MAX_SPLATMAPS_COUNT);
 
+    PROFILE_CPU_NAMED("Terrain.GetSplatMapData");
+
     if (_cachedSplatMap[index].HasItems())
         return _cachedSplatMap[index].Get();
 
-    PROFILE_CPU_NAMED("Terrain.GetSplatMapData");
-
     CacheSplatData();
 
     return _cachedSplatMap[index].Get();
 }
 
+void TerrainPatch::ClearSplatMapCache()
+{
+    PROFILE_CPU_NAMED("Terrain.ClearSplatMapCache");
+    _cachedSplatMap->Clear();
+}
+
+void TerrainPatch::ClearCache()
+{
+    ClearHeightmapCache();
+    ClearHolesMaskCache();
+    ClearSplatMapCache();
+}
+
 void TerrainPatch::CacheHeightData()
 {
     PROFILE_CPU_NAMED("Terrain.CacheHeightData");

Source/Engine/Terrain/TerrainPatch.h

@@ -229,12 +229,22 @@ public:
     /// <returns>The heightmap data.</returns>
     float* GetHeightmapData();
 
+    /// <summary>
+    /// Clears cache of the heightmap data.
+    /// </summary>
+    void ClearHeightmapCache();
+
     /// <summary>
     /// Gets the raw pointer to the holes mask data.
     /// </summary>
     /// <returns>The holes mask data.</returns>
     byte* GetHolesMaskData();
 
+    /// <summary>
+    /// Clears cache of the holes mask data.
+    /// </summary>
+    void ClearHolesMaskCache();
+
     /// <summary>
     /// Gets the raw pointer to the splat map data.
     /// </summary>
@@ -242,6 +252,16 @@ public:
     /// <returns>The splat map data.</returns>
     Color32* GetSplatMapData(int32 index);
 
+    /// <summary>
+    /// Clears cache of the splat map data.
+    /// </summary>
+    void ClearSplatMapCache();
+
+    /// <summary>
+    /// Clears all caches.
+    /// </summary>
+    void ClearCache();
+
     /// <summary>
     /// Modifies the terrain patch heightmap with the given samples.
     /// </summary>