Explicitly set r, g, b in setRGB calls (#26691)

Author: wlinna

examples/jsm/loaders/GLTFLoader.js

@@ -547,7 +547,7 @@ class GLTFLightsExtension {
 
 		const color = new Color( 0xffffff );
 
-		if ( lightDef.color !== undefined ) color.setRGB( ...lightDef.color, LinearSRGBColorSpace );
+		if ( lightDef.color !== undefined ) color.setRGB( lightDef.color[ 0 ], lightDef.color[ 1 ], lightDef.color[ 2 ], LinearSRGBColorSpace );
 
 		const range = lightDef.range !== undefined ? lightDef.range : 0;
 
@@ -665,7 +665,7 @@ class GLTFMaterialsUnlitExtension {
 
 				const array = metallicRoughness.baseColorFactor;
 
-				materialParams.color.setRGB( ...array, LinearSRGBColorSpace );
+				materialParams.color.setRGB( array[ 0 ], array[ 1 ], array[ 2 ], LinearSRGBColorSpace );
 				materialParams.opacity = array[ 3 ];
 
 			}
@@ -941,7 +941,8 @@ class GLTFMaterialsSheenExtension {
 
 		if ( extension.sheenColorFactor !== undefined ) {
 
-			materialParams.sheenColor.setRGB( ...extension.sheenColorFactor, LinearSRGBColorSpace );
+			const colorFactor = extension.sheenColorFactor;
+			materialParams.sheenColor.setRGB( colorFactor[ 0 ], colorFactor[ 1 ], colorFactor [ 2 ], LinearSRGBColorSpace );
 
 		}
 
@@ -1079,7 +1080,7 @@ class GLTFMaterialsVolumeExtension {
 		materialParams.attenuationDistance = extension.attenuationDistance || Infinity;
 
 		const colorArray = extension.attenuationColor || [ 1, 1, 1 ];
-		materialParams.attenuationColor = new Color().setRGB( ...colorArray, LinearSRGBColorSpace );
+		materialParams.attenuationColor = new Color().setRGB( colorArray[ 0 ], colorArray[ 1 ], colorArray[ 2 ], LinearSRGBColorSpace );
 
 		return Promise.all( pending );
 
@@ -1182,7 +1183,7 @@ class GLTFMaterialsSpecularExtension {
 		}
 
 		const colorArray = extension.specularColorFactor || [ 1, 1, 1 ];
-		materialParams.specularColor = new Color().setRGB( ...colorArray, LinearSRGBColorSpace );
+		materialParams.specularColor = new Color().setRGB( colorArray[ 0 ], colorArray[ 1 ], colorArray[ 2 ], LinearSRGBColorSpace );
 
 		if ( extension.specularColorTexture !== undefined ) {
 
@@ -3480,7 +3481,8 @@ class GLTFParser {
 
 		if ( materialDef.emissiveFactor !== undefined && materialType !== MeshBasicMaterial ) {
 
-			materialParams.emissive = new Color().setRGB( ...materialDef.emissiveFactor, LinearSRGBColorSpace );
+			const emissiveFactor = materialDef.emissiveFactor;
+			materialParams.emissive = new Color().setRGB( emissiveFactor[ 0 ], emissiveFactor[ 1 ], emissiveFactor[ 2 ], LinearSRGBColorSpace );
 
 		}