Fixed animated group textures not animating

[Nickelony]

This pull request introduces robust support for animated texture sub-areas - enabling tools that apply textures to only a portion of an animated frame (such as group texturing) to work seamlessly. The changes include a new utility for matching and generating sub-area animation sets, cache key structures for deduplication, and integration with both the general and TombEngine-specific texture managers. Additionally, some redundant code related to resetting texture parent areas was removed.

Animated texture sub-area support:

• Added AnimatedTextureLookupUtility with methods for matching, quantizing, and generating sub-area animation sets, as well as a SubAreaKey struct for deduplicating sub-area lookups. (TombLib/TombLib/LevelData/Compilers/AnimatedTextureLookupUtility.cs)
• Integrated sub-area animated texture matching and lookup generation into both TexInfoManager and TombEngineTexInfoManager, including logic to handle only compatible animation types and prevent redundant processing via _processedSubAreas. (TombLib/TombLib/LevelData/Compilers/Util/TexInfoManager.cs, TombLib/TombLib/LevelData/Compilers/TombEngine/TombEngineTexInfoManager.cs) [1] [2] [3] [4] [5]
• Modified the animated lookup generation to accept a isForRoom parameter, ensuring correct scoping of generated lookups. (TombLib/TombLib/LevelData/Compilers/Util/TexInfoManager.cs) [1] [2]

Code cleanup and bug fixes:

• Removed unnecessary resetting of texture.ParentArea before applying textures, preventing accidental loss of parent area information needed for sub-area matching. (TombEditor/EditorActions.cs) [1] [2]

Dependency management:

• Added missing using directive for the new utility in TexInfoManager. (TombLib/TombLib/LevelData/Compilers/Util/TexInfoManager.cs)

[Copilot]

Pull request overview

Fixes a compiler-side issue where animated textures applied as sub-areas (via group texturing tools using ParentArea) were not being recognized as animated, causing them to compile as static textures instead.

Changes:

• Detects textures with a non-zero ParentArea and attempts to match them against reference animated textures using reconstructed “full-frame” UVs.
• When a match is found, synthesizes a sub-area AnimatedTextureSet, generates lookup entries for it, and retries AddTexture so the sub-area can be treated as animated.
• Implements the same logic in both the classic TR compiler texinfo manager and the TombEngine texinfo manager.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 10 comments.

File	Description
TombLib/TombLib/LevelData/Compilers/Util/TexInfoManager.cs	Adds sub-area animated-texture detection + synthetic sub-animation lookup generation for classic/TR compilers.
TombLib/TombLib/LevelData/Compilers/TombEngine/TombEngineTexInfoManager.cs	Mirrors the sub-area animated-texture handling for TombEngine texture compilation.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 5 comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 5 comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Nickelony]

This PR is now complete and ready for review.