From 2c0c0c496efd906ea811a90342ec779f007fa85b Mon Sep 17 00:00:00 2001
From: Joseph Cloutier <player3.14@gmail.com>
Date: Thu, 4 Sep 2025 20:11:03 -0400
Subject: [PATCH] Add `ShaderRegisterData.custom`.

---
 away3d/materials/compilation/ShaderCompiler.hx     | 2 ++
 away3d/materials/compilation/ShaderRegisterData.hx | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/away3d/materials/compilation/ShaderCompiler.hx b/away3d/materials/compilation/ShaderCompiler.hx
index 90578e21..3eeea264 100644
--- a/away3d/materials/compilation/ShaderCompiler.hx
+++ b/away3d/materials/compilation/ShaderCompiler.hx
@@ -310,6 +310,8 @@ class ShaderCompiler
 		_vertexCode = "";
 		_fragmentCode = "";
 
+		_sharedRegisters.custom = null;
+
 		_sharedRegisters.localPosition = _registerCache.getFreeVertexVectorTemp();
 		_registerCache.addVertexTempUsages(_sharedRegisters.localPosition, 1);
 
diff --git a/away3d/materials/compilation/ShaderRegisterData.hx b/away3d/materials/compilation/ShaderRegisterData.hx
index 3198c911..8241544d 100644
--- a/away3d/materials/compilation/ShaderRegisterData.hx
+++ b/away3d/materials/compilation/ShaderRegisterData.hx
@@ -123,6 +123,12 @@ class ShaderRegisterData
 	 */
 	public var bitangent:ShaderRegisterElement;
 	
+	/**
+	 * Space for named registers other than the ones above. Will be null until
+	 * defined by an effect method.
+	 */
+	public var custom:Map<String, ShaderRegisterElement> = null;
+	
 	public function new()
 	{