fixed worldAlpha calculation when parent alpha is 0 (#628)

wouterlucas · web-flow · commit dc91494b9eb7 · 2025-08-15T09:40:39.000Z
diff --git a/src/core/CoreNode.ts b/src/core/CoreNode.ts
@@ -1148,7 +1148,7 @@ export class CoreNode extends EventEmitter {
     }
 
     if (updateType & UpdateType.WorldAlpha) {
-      this.worldAlpha = ((parent && parent.worldAlpha) || 1) * props.alpha;
+      this.worldAlpha = (parent?.worldAlpha ?? 1) * this.props.alpha;
       updateType |=
         UpdateType.PremultipliedColors |
         UpdateType.Children |

Original file line number	Diff line number	Diff line change
`@@ -1148,7 +1148,7 @@ export class CoreNode extends EventEmitter {`
`1148`	`1148`	`}`
`1149`	`1149`
`1150`	`1150`	`if (updateType & UpdateType.WorldAlpha) {`
`1151`		`- this.worldAlpha = ((parent && parent.worldAlpha) \|\| 1) * props.alpha;`
	`1151`	`+ this.worldAlpha = (parent?.worldAlpha ?? 1) * this.props.alpha;`
`1152`	`1152`	`updateType \|=`
`1153`	`1153`	`UpdateType.PremultipliedColors \|`
`1154`	`1154`	`UpdateType.Children \|`