From 5afd3fc57807f033e2b85d618e785e9fd985733f Mon Sep 17 00:00:00 2001
From: 0b5vr <0b5vr@0b5vr.com>
Date: Mon, 21 Oct 2024 17:31:04 +0900
Subject: [PATCH] fix: expressions, update isBinary behavior according to the
 spec

I will update test cases in the next commit

See: https://github.com/vrm-c/vrm-specification/blob/master/specification/VRMC_vrm-1.0/expressions.md#expression-specification

The suggestion: https://github.com/pixiv/three-vrm/pull/1489

Co-authored-by: ke456-png <108649297+ke456-png@users.noreply.github.com>
---
 packages/three-vrm-core/src/expressions/VRMExpression.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/three-vrm-core/src/expressions/VRMExpression.ts b/packages/three-vrm-core/src/expressions/VRMExpression.ts
index 66302813b..4dfbd5706 100644
--- a/packages/three-vrm-core/src/expressions/VRMExpression.ts
+++ b/packages/three-vrm-core/src/expressions/VRMExpression.ts
@@ -92,7 +92,7 @@ export class VRMExpression extends THREE.Object3D {
    */
   public get outputWeight(): number {
     if (this.isBinary) {
-      return this.weight >= 0.5 ? 1.0 : 0.0;
+      return this.weight > 0.5 ? 1.0 : 0.0;
     }
 
     return this.weight;