fix right viewpoint

Author: williamchange

material_maker/panels/preview_3d/model_menu.gd

@@ -142,7 +142,7 @@ func _on_snap_pressed(id: int) -> void:
 			rot1.y = PI * (1.0 if shift_down else 0.0)
 		SnapView.Right:
 			rot2.x = 0.0
-			rot1.y = -PI * (-0.5 if shift_down else 0.5)
+			rot1.y = -PI * (0.5 if shift_down else -0.5)
 	tween.tween_property(camrot2, "rotation", rot2, 0.2).set_trans(Tween.TRANS_CUBIC)
 	tween.parallel().tween_property(camrot1, "rotation", rot1, 0.2).set_trans(Tween.TRANS_CUBIC)
 	tween.parallel().tween_property(pivot, "transform:origin", Vector3.ZERO, 0.2).set_trans(Tween.TRANS_CUBIC)