Line2NodeMaterial: Fix usage of optional nodes. (#30107)

* Line2NodeMaterial: fix gap

* Update PerspectiveCamera.js

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Co-authored-by: Samuel Rigaud <srigaud@duodisplay.com>
Co-authored-by: Michael Herzog <michael.herzog@human-interactive.org>

src/materials/nodes/Line2NodeMaterial.js

@@ -100,7 +100,7 @@ class Line2NodeMaterial extends NodeMaterial {
 			if ( useDash ) {
 
 				const dashScaleNode = this.dashScaleNode ? float( this.dashScaleNode ) : materialLineScale;
-				const offsetNode = this.offsetNode ? float( this.offsetNodeNode ) : materialLineDashOffset;
+				const offsetNode = this.offsetNode ? float( this.offsetNode ) : materialLineDashOffset;
 
 				const instanceDistanceStart = attribute( 'instanceDistanceStart' );
 				const instanceDistanceEnd = attribute( 'instanceDistanceEnd' );
@@ -277,7 +277,7 @@ class Line2NodeMaterial extends NodeMaterial {
 			if ( useDash ) {
 
 				const dashSizeNode = this.dashSizeNode ? float( this.dashSizeNode ) : materialLineDashSize;
-				const gapSizeNode = this.dashSizeNode ? float( this.dashGapNode ) : materialLineGapSize;
+				const gapSizeNode = this.gapSizeNode ? float( this.gapSizeNode ) : materialLineGapSize;
 
 				dashSize.assign( dashSizeNode );
 				gapSize.assign( gapSizeNode );