proj2 - Solutions to Picture language project This project...

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Sheet1 Page 1 (define (up-split painter n) (if (= n 0) painter (let ((smaller (up-split painter (- n 1)))) (below painter (beside smaller smaller))))) (define (split major minor) (define (splitter painter n) (if (= n 0) painter (let ((smaller (splitter painter (- n 1)))) (major painter (minor smaller smaller))))) splitter) (define make-vect cons) (define xcor-vect car) (define ycor-vect cdr) (define (add-vect v1 v2) (make-vect (+ (xcor-vect v1) (xcor-vect v2)) (+ (ycor-vect v1) (ycor-vect v2)))) (define (sub-vect v1 v2) (make-vect (- (xcor-vect v1) (xcor-vect v2)) (- (ycor-vect v1) (ycor-vect v2)))) (define (scale-vect s v) (make-vect (* s (xcor-vect v)) (* s (ycor-vect v)))) (define (make-frame origin edge1 edge2) (list origin edge1 edge2)) (define origin-frame car) (define edge1-frame cadr) (define edge2-frame caddr)
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Sheet1 Page 2 (define (make-frame origin edge1 edge2) (cons origin (cons edge1 edge2))) (define origin-frame car) (define edge1-frame cadr) (define edge2-frame cddr) ( (define make-segment cons) (define start-segment car) (define end-segment cdr) (define frame-painter (segments->painter (list (make-segment (make-vect 0 0) (make-vect 0 1)) (make-segment (make-vect 0 1) (make-vect 1 1)) (make-segment (make-vect 1 1) (make-vect 1 0)) (make-segment (make-vect 1 0) (make-vect 0 0))))) (define X-painter (segments->painter
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