-! Copyright © 2008 Reginald Keith Ford II
-! Tools for quickly comparing, transforming, and evaluating mathematical Factor functions
-
+! Copyright (c) 2008 Reginald Keith Ford II.
+! See http://factorcode.org/license.txt for BSD license.
USING: kernel math arrays ;
-IN: math.function-tools
-: difference-func ( func func -- func ) [ bi - ] 2curry ;
-: eval ( x func -- pt ) dupd call 2array ;
-: eval3d ( x y func -- pt ) [ 2dup ] dip call 3array ;
+IN: math.function-tools
+
+! Tools for quickly comparing, transforming, and evaluating mathematical functions
+
+: difference-func ( func func -- func )
+ [ bi - ] 2curry ; inline
+
+: eval ( x func -- pt )
+ dupd call( x -- y ) 2array ; inline
+
+: eval-inverse ( y func -- pt )
+ dupd call( y -- x ) swap 2array ; inline
+
+: eval3d ( x y func -- pt )
+ [ 2dup ] dip call( x y -- z ) 3array ; inline