TSL: GLSL alias functions (#30150)

Author: sunag

src/Three.TSL.js

@@ -155,6 +155,7 @@ export const exp2 = TSL.exp2;
 export const expression = TSL.expression;
 export const faceDirection = TSL.faceDirection;
 export const faceForward = TSL.faceForward;
+export const faceforward = TSL.faceforward;
 export const float = TSL.float;
 export const floor = TSL.floor;
 export const fog = TSL.fog;
@@ -194,6 +195,7 @@ export const instancedDynamicBufferAttribute = TSL.instancedDynamicBufferAttribu
 export const instancedMesh = TSL.instancedMesh;
 export const int = TSL.int;
 export const inverseSqrt = TSL.inverseSqrt;
+export const inversesqrt = TSL.inversesqrt;
 export const invocationLocalIndex = TSL.invocationLocalIndex;
 export const invocationSubgroupIndex = TSL.invocationSubgroupIndex;
 export const ior = TSL.ior;

src/nodes/math/MathNode.js

@@ -943,6 +943,13 @@ export const atan2 = ( y, x ) => { // @deprecated, r172
 
 };
 
+// GLSL alias function
+
+export const faceforward = faceForward;
+export const inversesqrt = inverseSqrt;
+
+// Method chaining
+
 addMethodChaining( 'all', all );
 addMethodChaining( 'any', any );
 addMethodChaining( 'equals', equals );