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;;;; License: CC0-1.0
#lang racket
(provide
frame-coord-map
paint
segments->painter
wave->painter
x->painter)
(require racket/draw)
(require racket/snip)
(require "46.rkt")
(require "47.rkt")
(require "48.rkt")
(define dc #f) ; drawing context. gets initialized by paint function.
(define (draw-line v1 v2)
(let ((x1 (xcor-vect v1))
(y1 (ycor-vect v1))
(x2 (xcor-vect v2))
(y2 (ycor-vect v2)))
(send dc draw-line x1 y1 x2 y2)))
(define (paint painter)
(let ((frame (make-frame (make-vect 250 250)
(make-vect 500 0)
(make-vect 0 500)))
(target (make-bitmap 1000 1000)))
(set! dc (new bitmap-dc% (bitmap target)))
(painter frame)
(make-object image-snip% target)))
(define (frame-coord-map frame)
(lambda (v)
(add-vect
(origin-frame frame)
(add-vect
(scale-vect (xcor-vect v) (edge1-frame frame))
(scale-vect (ycor-vect v) (edge2-frame frame))))))
(define (segments->painter segment-list)
(lambda (frame)
(for-each
(lambda (segment)
(draw-line
((frame-coord-map frame)
(start-segment segment))
((frame-coord-map frame)
(end-segment segment))))
segment-list)))
(define (outline->painter)
(let ((v-tl (make-vect 0 0)) ; top left
(v-tr (make-vect 1 0)) ; top right
(v-br (make-vect 1 1)) ; bottom right
(v-bl (make-vect 0 1))) ; bottom left
(segments->painter
(list (make-segment v-tl v-tr)
(make-segment v-tr v-br)
(make-segment v-br v-bl)
(make-segment v-bl v-tl)))))
(define (x->painter)
(let ((v-tl (make-vect 0 0)) ; top left
(v-tr (make-vect 1 0)) ; top right
(v-br (make-vect 1 1)) ; bottom right
(v-bl (make-vect 0 1))) ; bottom left
(segments->painter
(list (make-segment v-tl v-br)
(make-segment v-tr v-bl)))))
(define (diamond->painter)
(let ((v-mt (make-vect 0.5 0)) ; midpoint top
(v-mr (make-vect 1 0.5)) ; midpoint right
(v-mb (make-vect 0.5 1)) ; midpoint bottom
(v-ml (make-vect 0 0.5))) ; midpoint left
(segments->painter
(list (make-segment v-mt v-mr)
(make-segment v-mr v-mb)
(make-segment v-mb v-ml)
(make-segment v-ml v-mt)))))
(define (wave->painter)
(let* ((h-ls (make-vect 0.426 0.000)) ; head - left start
(h-le (make-vect 0.349 0.164)) ; head - left end
(h-rs (make-vect 0.505 0.000)) ; head - right start
(h-re (make-vect 0.577 0.165)) ; head - right end
(n-le (make-vect 0.434 0.287)) ; neck - left end
(n-re (make-vect 0.499 0.283)) ; neck - right end
(sh-le (make-vect 0.302 0.288)) ; shoulder - left end
(sh-re (make-vect 0.620 0.290)) ; shoulder - right end
(lh-ts (make-vect 0.000 0.200)) ; left hand - top start
(lh-te (make-vect 0.257 0.400)) ; left hand - top end
(lh-bs (make-vect 0.000 0.316)) ; left hand - bottom start
(lh-be (make-vect 0.296 0.533)) ; left hand - bottom end
(uat-ls sh-le) ; upper arm top - left start
(uat-le lh-te) ; upper arm top - left end
(uab-ls (make-vect 0.398 0.371)) ; upper arm bottom - left end
(uab-le lh-be) ; upper arm bottom - left end
(uat-rs sh-re) ; upper arm top - right start
(uat-re (make-vect 1.000 0.550)) ; upper arm top - right end
(uab-rs (make-vect 1.000 0.660)) ; upper arm bottom - right start
(uab-re (make-vect 0.563 0.376)) ; upper arm bottom - right end
(wll-os uab-ls) ; waist left leg - outside start
(wll-oe (make-vect 0.290 1.000)) ; waist left leg - outside end
(wll-is (make-vect 0.490 0.642)) ; waist left leg - inside start
(wll-ie (make-vect 0.384 1.000)) ; waist left leg - inside end
(wrl-os uab-re) ; waist right leg - outside start
(wrl-oe (make-vect 0.730 1.000)) ; waist right leg - outside end
(wrl-is wll-is) ; waist right leg - inside start
(wrl-ie (make-vect 0.650 1.000))) ; waist right leg - inside end
(segments->painter
(list
;; head
(make-segment h-ls h-le)
(make-segment h-rs h-re)
(make-segment h-le n-le)
(make-segment h-re n-re)
;; neck
(make-segment n-le sh-le)
(make-segment n-re sh-re)
;; left hand
(make-segment lh-ts lh-te)
(make-segment lh-bs lh-be)
;; upper arm left
(make-segment uat-ls uat-le)
(make-segment uab-ls uab-le)
;; upper arm right
(make-segment uat-rs uat-re)
(make-segment uab-rs uab-re)
;; waist - legs
(make-segment wll-os wll-oe)
(make-segment wll-is wll-ie)
(make-segment wrl-os wrl-oe)
(make-segment wrl-is wrl-ie)))))
;;; https://ricketyspace.net/sicp/2.49.webm
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