TSL: Fix bitcast type resolver

src/nodes/math/MathNode.js

@@ -101,8 +101,8 @@ class MathNode extends TempNode {
 	getInputType( builder ) {
 
 		const aType = this.aNode.getNodeType( builder );
-		const bType = this.bNode ? this.bNode.getNodeType( builder ) : null;
-		const cType = this.cNode ? this.cNode.getNodeType( builder ) : null;
+		const bType = ( this.bNode && this.bNode.isNode ) ? this.bNode.getNodeType( builder ) : null;
+		const cType = ( this.cNode && this.cNode.isNode ) ? this.cNode.getNodeType( builder ) : null;
 
 		const aLen = builder.isMatrix( aType ) ? 0 : builder.getTypeLength( aType );
 		const bLen = builder.isMatrix( bType ) ? 0 : builder.getTypeLength( bType );
@@ -152,6 +152,10 @@ class MathNode extends TempNode {
 
 			return builder.changeComponentType( this.aNode.getNodeType( builder ), 'bool' );
 
+		} else if ( method === MathNode.BITCAST ) {
+
+			return this.bNode;
+
 		} else {
 
 			return this.getInputType( builder );
@@ -239,6 +243,17 @@ class MathNode extends TempNode {
 
 			return builder.format( '( - ' + a.build( builder, inputType ) + ' )', type, output );
 
+
+		} else if ( method === MathNode.BITCAST ) {
+
+			const params = [];
+
+			params.push(
+				a.build( builder, inputType ),
+			);
+
+			return builder.format( `${ builder.getMethod( method ) }<${builder.getType( type )}>( ${params.join( ', ' )} )`, inputType, output );
+
 		} else {
 
 			const params = [];

src/renderers/webgpu/nodes/WGSLNodeBuilder.js

@@ -127,8 +127,7 @@ const wgslMethods = {
 	equals_bvec2: 'tsl_equals_bvec2',
 	equals_bvec3: 'tsl_equals_bvec3',
 	equals_bvec4: 'tsl_equals_bvec4',
-	inversesqrt: 'inverseSqrt',
-	bitcast: 'bitcast<f32>'
+	inversesqrt: 'inverseSqrt'
 };
 
 // WebGPU issue: does not support pow() with negative base on Windows