Initial commit: ROW Client source code

Game client codebase including:
- CharacterActionControl: Character and creature management
- GlobalScript: Network, items, skills, quests, utilities
- RYLClient: Main client application with GUI and event handlers
- Engine: 3D rendering engine (RYLGL)
- MemoryManager: Custom memory allocation
- Library: Third-party dependencies (DirectX, boost, etc.)
- Tools: Development utilities

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Library/dxx8/samples/Multimedia/Direct3D/Billboard/readme.txt

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+//-----------------------------------------------------------------------------
+// Name: Billboard Direct3D Sample
+// 
+// Copyright (c) 1998-2001 Microsoft Corporation. All rights reserved.
+//-----------------------------------------------------------------------------
+
+
+Description
+===========
+   The Billboard sample illustrates the billboarding technique. Rather than
+   rendering complex 3D models (such as a high-polygon tree model),
+   billboarding renders a 2D image of the model and rotates it to always face
+   the eyepoint. This technique is commonly used to render trees, clouds,
+   smoke, explosions, and more. For more information, see 
+   Common Techniques and Special Effects.
+
+   The sample has a camera fly around a 3D scene with a tree-covered hill. The
+   trees look like 3D objects, but they are actually 2-D billboarded images
+   that are rotated towards the eye point. The hilly terrain and the skybox 
+   (6-sided cube containing sky textures) are just objects loaded from .x
+   files, used for visual effect, and are unrelated to the billboarding
+   technique.
+   
+Path
+====
+   Source:     DXSDK\Samples\Multimedia\D3D\Billboard
+   Executable: DXSDK\Samples\Multimedia\D3D\Bin
+
+
+User's Guide
+============
+   The following keys are implemented. The dropdown menus can be used for the
+   same controls.
+      <Enter>     Starts and stops the scene
+      <Space>     Advances the scene by a small increment
+      <F1>        Shows help or available commands.
+      <F2>        Prompts user to select a new rendering device or display mode
+      <Alt+Enter> Toggles between fullscreen and windowed modes
+      <Esc>       Exits the app.
+	
+
+Programming Notes
+=================
+   The billboarding technique is the focus of this sample. Each frame, the
+   camera is moved, so the viewpoint changes accordingly. As the viewpoint
+   changes, a rotation matrix is generated to rotate the billboards about
+   the y-axis so that they face the new viewpoint. The computation of the 
+   billboard matrix occurs in the FrameMove() function. The trees are also
+   sorted in that function, as required for proper alpha blanding, since 
+   billboards typically have some transparent pixels. The trees are 
+   rendered from a vertex buffer in the DrawTrees() function.
+   
+   Note that the billboards in this sample are constrained to rotate about the 
+   y-axis only, as otherwise the tree trunks would appear to not be fixed to 
+   the ground. In a 3D flight sim or space shooter, for effects like 
+   explosions, billboards are typically not constrained to one axis.
+   
+   This sample makes use of common DirectX code (consisting of helper functions,
+   etc.) that is shared with other samples on the DirectX SDK. All common
+   headers and source code can be found in the following directory:
+      DXSDK\Samples\Multimedia\Common
+