75f76986c3
Bounds fixpoint computation now uses only exact rationals Speed improvements (3d-plot-area% now uses flonums internally as much as possible)
34 lines
1.1 KiB
Racket
34 lines
1.1 KiB
Racket
#lang racket/base
|
|
|
|
(require (for-syntax racket/base) racket/unsafe/ops
|
|
"utils.rkt")
|
|
|
|
(provide (all-defined-out))
|
|
|
|
;; Returns the interpolated distance of z from za toward zb
|
|
;; Examples: if z = za, this returns 0.0
|
|
;; if z = zb, this returns 1.0
|
|
;; if z = (za + zb) / 2, this returns 0.5
|
|
;; Intuitively, regard a use (solve-t z za zb) as "the point between za and zb".
|
|
(define-syntax-rule (unsafe-solve-t z za zb)
|
|
(unsafe-fl/ (unsafe-fl- z za) (unsafe-fl- zb za)))
|
|
|
|
(define-syntax-rule (unsafe-unsolve-t za zb t)
|
|
(unsafe-fl+ (unsafe-fl* t zb) (unsafe-fl* (unsafe-fl- 1.0 t) za)))
|
|
|
|
(define-syntax-rule (unsolve-t za zb t)
|
|
(let ([t (inexact->exact t)])
|
|
(+ (* t zb) (* (- 1 t) za))))
|
|
|
|
(define-syntax-rule (unsafe-flavg4 z1 z2 z3 z4)
|
|
(unsafe-fl* 0.25 (unsafe-fl+ (unsafe-fl+ (unsafe-fl+ z1 z2) z3) z4)))
|
|
|
|
(define-syntax-rule (all pred? obj ...) (and (pred? obj) ...))
|
|
|
|
(define-syntax (find-failure-index stx)
|
|
(syntax-case stx ()
|
|
[(_ pred? id ...)
|
|
(with-syntax ([(i ...) (build-list (length (syntax->list #'(id ...))) values)])
|
|
(syntax/loc stx
|
|
(or (and (not (pred? id)) i) ...)))]))
|