fix normal bug

src/client/main.ts

@@ -514,6 +514,9 @@ function drawScene(gl: any,
 	mat4.rotateZ(normalModelMatrix,
 		normalModelMatrix,
 		params.rot.z);
+	mat4.rotateY(normalModelMatrix,
+		normalModelMatrix,
+		squareRotation);
 
 	const modelMatrix = mat4.create();
 	mat4.translate(modelMatrix,
@@ -523,9 +526,6 @@ function drawScene(gl: any,
 			-params.avg.y,
 			-params.avg.z,
 		]);
-	mat4.rotateY(modelMatrix,
-		modelMatrix,
-		squareRotation);
 
 	// Set the drawing position to the "identity" point, which is
 	// the center of the scene.