quadratic-cursor

Vocabulary

cursors

Definition

IN: cursors

TUPLE: quadratic-cursor < numeric-cursor
    { delta read-only } { delta2 read-only } ;

Methods

USING: cursors kernel ;

M: quadratic-cursor cursor-compatible?
    [ linear-cursor? ] both? ; inline


USING: accessors cursors kernel math ;

M: quadratic-cursor dec-cursor
    [ value>> ] [ delta>> ] [ delta2>> ] tri
    [ - [ - ] keep ] keep <quadratic-cursor> ; inline


USING: accessors cursors kernel math ;

M: quadratic-cursor inc-cursor
    [ value>> ] [ delta>> [ + ] keep ] [ delta2>> [ + ] keep ]
    tri <quadratic-cursor> ; inline