From c7bc88bce43274dc0dac1c2fa5d74edef7bc0c0d Mon Sep 17 00:00:00 2001
From: fallenoak <git@fallenoak.me>
Date: Wed, 31 Jan 2024 22:16:36 -0600
Subject: [PATCH] chore(model): avoid creating unnecessary texture weight
 tracks

---
 src/lib/model/ModelManager.ts | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/src/lib/model/ModelManager.ts b/src/lib/model/ModelManager.ts
index 372f176..342fc5a 100644
--- a/src/lib/model/ModelManager.ts
+++ b/src/lib/model/ModelManager.ts
@@ -219,13 +219,21 @@ class ModelManager {
 
     const animator = new ModelAnimator(spec.loops, spec.sequences, spec.skinned ? spec.bones : []);
 
-    for (const [index, textureWeight] of spec.textureWeights.entries()) {
-      animator.registerTrack(
-        { state: 'textureWeights', index },
-        textureWeight.weightTrack,
-        THREE.NumberKeyframeTrack,
-        (value: number) => value / 0x7fff,
-      );
+    const hasTextureWeights =
+      spec.textureWeights.length > 1 ||
+      spec.textureWeights[0]?.weightTrack.sequenceKeys.length > 1 ||
+      spec.textureWeights[0]?.weightTrack.sequenceKeys[0].length > 1 ||
+      spec.textureWeights[0]?.weightTrack.sequenceKeys[0][0] !== 0x7fff;
+
+    if (hasTextureWeights) {
+      for (const [index, textureWeight] of spec.textureWeights.entries()) {
+        animator.registerTrack(
+          { state: 'textureWeights', index },
+          textureWeight.weightTrack,
+          THREE.NumberKeyframeTrack,
+          (value: number) => value / 0x7fff,
+        );
+      }
     }
 
     for (const [index, textureTransform] of spec.textureTransforms.entries()) {