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408 lines
12 KiB
Scheme
408 lines
12 KiB
Scheme
27 years ago
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(define num-colors 200)
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(define mesh-color (make-object wx:colour% 50 155 50))
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(define mesh-pen (make-object wx:pen% mesh-color 1 wx:const-solid))
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(define black-pen (make-object wx:pen% "BLACK" 1 wx:const-solid))
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(define colors
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(tabulate num-colors
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(lambda (i)
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(make-object wx:colour%
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(* 255 (expt (/ i (1- num-colors)) 1/2))
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(* 255 (/ i (1- num-colors)))
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(* 255 (expt (/ i (1- num-colors)) 1/2))))))
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(define mesh%
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(make-class mred:menu-frame%
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(rename [super-make-menu-bar make-menu-bar]
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; [super-on-paint on-paint]
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)
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(inherit make-menu show panel)
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(public
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[mesh #f]
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[filename #f]
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[margin 10]
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[on-paint
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(lambda ()
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(send left-canvas on-paint)
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(send right-canvas on-paint))]
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[canvas%
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(make-class mred:canvas%
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(inherit set-background get-dc clear get-client-size)
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(rename [super-on-event on-event])
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(private
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[w-brush (make-object wx:brush% "white" wx:const-solid)])
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(public
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[node-value-get (void)]
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[node-value-update (void)]
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[memory-dc (make-object wx:memory-dc%)]
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[set-memory-dc! (lambda (mdc) (set! memory-dc mdc))]
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[draw-line (void)]
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[dc (void)]
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[on-event
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(let* ([dragging-node (void)]
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[connections null]
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[orig-x (void)]
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[orig-y (void)]
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[last-x -1]
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[last-y -1]
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[lines (lambda ()
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(for-each
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(lambda (x)
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(let ([p (node-value-get (graph:value x))])
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(draw-line (posn-x p) (posn-y p)
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last-x last-y)))
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connections))])
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(lambda (event)
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(cond
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[(send event dragging?)
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(let ([x (send event get-x)]
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[y (send event get-y)])
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(when (and (not (and (= x last-x)
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(= x last-y)))
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'(inside-triangles dragging-node x y))
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(lines)
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(set! last-x x)
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(set! last-y y)
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(lines)))]
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[(send event button-down?)
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(let ([x (send event get-x)]
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[y (send event get-y)])
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(send dc set-logical-function wx:const-xor)
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(when mesh
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(set! dragging-node (find-closest mesh x y node-value-get))
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(set! connections (graph:connections dragging-node)))
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(set! last-x x)
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(set! last-y y)
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(set! orig-x x)
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(set! orig-y y)
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(lines))]
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[(send event button-up?)
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(lines)
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(send dc set-logical-function wx:const-copy)
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(unless (void? dragging-node)
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(node-value-update (graph:value dragging-node)
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(make-posn last-x last-y)))
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(let* ([posns (cons (make-posn last-x last-y)
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(map (lambda (x)
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(node-value-get (graph:value x)))
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connections))]
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[box-width (box 0)]
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[box-height (box 0)]
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[min-x orig-x]
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[min-y orig-y]
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[max-x orig-x]
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[max-y orig-y])
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(for-each (lambda (p)
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(let ([x (posn-x p)]
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[y (posn-y p)])
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(when (< max-x x) (set! max-x x))
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(when (< max-y y) (set! max-y y))
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(when (< x min-x) (set! min-x x))
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(when (< y min-y) (set! min-y y))))
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posns)
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'(send dc set-clipping-region min-x min-y
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(1+ (- max-x min-x))
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(1+ (- max-y min-y)))
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(on-paint)
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(get-client-size box-width box-height)
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(send dc set-clipping-region
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0 0 (unbox box-width) (unbox box-height)))
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(set! dragging-node (void))
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(set! connections (void))
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(set! orig-x (void))
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(set! orig-y (void))
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(set! last-x (void))
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(set! last-y (void))]
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[else (super-on-event event)])))]
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[on-paint
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(lambda ()
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(let* ([get-points
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(lambda (node)
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(let* ([value (graph:value node)]
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[p (node-value-get value)])
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(values (posn-x p)(posn-y p))))]
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[traverse
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(lambda (node)
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(let-values ([(b-x b-y) (get-points node)])
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(let* ([children (graph:children node)]
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[chili
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(lambda (child)
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(let-values ([(e-x e-y) (get-points child)])
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(draw-line b-x b-y e-x e-y)))])
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(for-each chili children))))]
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[dc (get-dc)]
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[by (box 0)]
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[bx (box 0)])
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(get-client-size bx by)
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(set-background w-brush)
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(clear)
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(send dc set-pen black-pen)
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(send dc blit 0 0 (unbox bx) (unbox by)
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memory-dc 0 0 wx:const-copy)
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(when mesh
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(send dc set-pen mesh-pen)
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'(send dc set-logical-function wx:const-xor)
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(graph:traverse mesh traverse)
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'(send dc set-logical-function wx:const-copy))))])
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(lambda (get update . args)
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(apply super-init args)
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(set! dc (get-dc))
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(set! draw-line (ivar dc draw-line))
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(set! node-value-get get)
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(set! node-value-update update)))]
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[left-filename #f]
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[right-filename #f]
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[left-2dvec #f]
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[right-2dvec #f]
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[left-canvas #f]
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[right-canvas #f]
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[default-size 200]
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[canvas-size-diff 0]
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[get-sizes
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(lambda ()
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(let* ([left-width (if left-2dvec
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(ivar left-2dvec width)
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default-size)]
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[left-height (if left-2dvec
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(ivar left-2dvec height)
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default-size)]
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[right-width (if right-2dvec
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(ivar right-2dvec width)
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default-size)]
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[right-height (if right-2dvec
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(ivar right-2dvec height)
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default-size)])
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(values left-width left-height right-width right-height)))]
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[resize-panels
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(lambda ()
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(let-values ([(left-width left-height right-width right-height)
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(get-sizes)])
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(send left-canvas user-min-width (+ canvas-size-diff left-width))
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(send left-canvas user-min-height (+ canvas-size-diff left-height))
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(send right-canvas user-min-width (+ canvas-size-diff right-width))
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(send right-canvas user-min-height (+ canvas-size-diff right-height))))]
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[open
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(lambda (fn)
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(mred:show-busy-cursor
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(lambda ()
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(let* ([port (open-input-file fn)]
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[local-mesh #f]
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[read-value
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(lambda (port)
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(let ([left (read port)]
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[right (read port)])
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(cons (apply make-posn left)
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(apply make-posn right))))])
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(set! left-filename (read port))
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(set! right-filename (read port))
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(when (read port)
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(set! local-mesh (graph:read read-value port)))
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(close-input-port port)
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(debug-print mesh% 'read 'file)
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(set! left-2dvec (build-image left-filename))
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(set! right-2dvec (build-image right-filename))
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(debug-print mesh% 'built-2dvecs)
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(send left-canvas set-memory-dc! (build-memory-dc left-2dvec))
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(send right-canvas set-memory-dc! (build-memory-dc right-2dvec))
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(debug-print mesh% 'updated 'canvases)
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(set! mesh local-mesh)
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(set! filename fn)
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(resize-panels)
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(on-paint)))))]
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[save
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(lambda ()
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(if filename
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(begin
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(let ([port (open-output-file filename 'replace)]
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[print-value
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(lambda (port v)
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(let ([left (car v)]
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[right (cdr v)])
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(fprintf port "~s ~s"
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(list (posn-x left) (posn-y left))
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(list (posn-x right) (posn-y right)))))])
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(fprintf port ";;; data req'd to setup a morph~n~n")
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(fprintf port "~s ; source filename~n" left-filename)
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(fprintf port "~s ; destination filename~n" right-filename)
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(fprintf port "~n;; mesh~n")
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(if mesh
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(begin
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(fprintf port "#t ; mesh is setup~n")
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(graph:fprintf port mesh print-value))
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(fprintf port "#f ; mesh is not setup~n"))
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(close-output-port port)))
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(save-as)))]
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[save-as
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(lambda ()
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(let ([fn (mred:common-put-file)])
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(when fn
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(set! filename fn)
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(save))))]
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[make-menu-bar
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(lambda ()
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(let ([bar (super-make-menu-bar)]
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[file-menu (make-menu)]
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[picture-menu (make-menu)]
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[mesh-menu (make-menu)]
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[morph-menu (make-menu)])
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(send file-menu append-item "Open..."
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(lambda ()
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(let ([fn (mred:common-get-file)])
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(when fn (open fn)))))
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(send file-menu append-item "Save..." save)
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(send file-menu append-item "Save As..." save-as)
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(send file-menu append-separator)
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(send file-menu append-item "Close" (lambda () (show #f)))
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(send picture-menu append-item "Select Source Image..."
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(lambda ()
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(let ([fn (mred:common-get-file
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'() "Please choose an image.")])
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(when fn
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(mred:show-busy-cursor
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(lambda ()
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(set! left-filename fn)
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(time (set! left-2dvec (build-image fn)))
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(time (send left-canvas set-memory-dc!
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(build-memory-dc left-2dvec)))
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(set! mesh #f)
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(resize-panels)
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(on-paint)))))))
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(send picture-menu append-item "Select Destination Image..."
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(lambda ()
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(let ([fn (mred:common-get-file
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'() "Please choose an image.")])
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(when fn
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(mred:show-busy-cursor
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(lambda ()
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(set! right-filename fn)
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(set! right-2dvec (build-image fn))
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(send right-canvas set-memory-dc!
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(build-memory-dc right-2dvec))
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(set! mesh #f)
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(resize-panels)
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(on-paint)))))))
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(send picture-menu append-item "Exchange Images"
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(lambda ()
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(let ([left-mdc (ivar left-canvas memory-dc)]
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[right-mdc (ivar right-canvas memory-dc)]
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[tmp left-2dvec]
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[exchange
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(lambda (node)
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(let* ([value (graph:value node)]
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[left (car value)])
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(set-car! value (cdr value))
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(set-cdr! value left)))])
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(set! left-2dvec right-2dvec)
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(set! right-2dvec tmp)
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(send right-canvas set-memory-dc! left-mdc)
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(send left-canvas set-memory-dc! right-mdc)
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(graph:traverse mesh exchange)
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(resize-panels)
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(on-paint))))
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(send mesh-menu append-item "Fresh Mesh..."
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(lambda ()
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(fresh-mesh (get-number-from-user
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"How large should the mesh be?"
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"Mesh Size" "5"))
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(on-paint)))
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(send morph-menu append-item "Morph..."
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(lambda () (morph (get-number-from-user
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"How many steps in the morph?"
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"Morph Size" "3"))))
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(send bar append file-menu "File")
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(send bar append picture-menu "Images")
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(send bar append mesh-menu "Mesh")
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(send bar append morph-menu "Morph")
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bar))]
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[morph
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(lambda (steps)
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(if (and left-2dvec right-2dvec mesh)
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(main mesh (ivar left-canvas memory-dc)
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(ivar right-canvas memory-dc)
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left-2dvec right-2dvec steps)
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(wx:message-box "Please choose images and mesh.")))]
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[fresh-mesh
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(lambda (n)
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(let-values ([(left-width left-height right-width right-height)
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(get-sizes)])
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(let* ([nodes
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(let loop ([row (1- n)] [column (1- n)])
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(let ([row-percent (/ row (1- n))]
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[column-percent (/ column (1- n))])
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(cons
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(graph:node
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(cons (make-posn (* left-width row-percent)
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(* left-height column-percent))
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(make-posn (* right-width row-percent)
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(* right-height column-percent))))
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(cond
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[(and (= row 0) (= column 0)) null]
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[(= row 0) (loop (1- n) (1- column))]
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[else (loop (1- row) column)]))))]
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[2dvec (make-object 2d-vector% n n 0)]
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[lookup (ivar 2dvec lookup)]
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|
|
[update (ivar 2dvec update)])
|
||
|
|
(send 2dvec bend (reverse nodes))
|
||
|
|
|
||
|
|
(if (< 2 n)
|
||
|
|
(begin
|
||
|
|
'(graph:edge (lookup 0 (1- n)) (lookup 1 (1- n)))
|
||
|
|
(let loop ([x (- n 2)] [y (- n 2)])
|
||
|
|
(graph:edge (lookup x y) (lookup x (1+ y)))
|
||
|
|
(graph:edge (lookup x y) (lookup (1+ x) y))
|
||
|
|
(graph:edge (lookup x y) (lookup (1+ x) (1+ y)))
|
||
|
|
(cond [(and (= x 0) (= y 0)) (void)]
|
||
|
|
[(= x 0) (loop (- n 2) (1- y))]
|
||
|
|
[else (loop (1- x) y)]))
|
||
|
|
(let loop ([i (- n 2)])
|
||
|
|
(when (<= 0 i)
|
||
|
|
(graph:edge (lookup (1- n) i) (lookup (1- n) (1+ i)))
|
||
|
|
(graph:edge (lookup i (1- n)) (lookup (1+ i) (1- n)))
|
||
|
|
(loop (1- i)))))
|
||
|
|
(begin
|
||
|
|
(graph:edge (lookup 0 0) (lookup 0 1))
|
||
|
|
(graph:edge (lookup 0 0) (lookup 1 0))
|
||
|
|
(graph:edge (lookup 0 0) (lookup 1 1))
|
||
|
|
(graph:edge (lookup 1 0) (lookup 1 1))
|
||
|
|
(graph:edge (lookup 0 1) (lookup 1 1))))
|
||
|
|
|
||
|
|
(set! mesh (lookup 0 0)))))])
|
||
|
|
|
||
|
|
(lambda ()
|
||
|
|
(super-init '() "Mesh Construction")
|
||
|
|
(send panel stretchable-in-x #f)
|
||
|
|
(send panel stretchable-in-y #f)
|
||
|
|
(let ([p (make-object mred:horizontal-panel% panel)]
|
||
|
|
[init
|
||
|
|
(lambda (c)
|
||
|
|
(send c user-min-height default-size)
|
||
|
|
(send c user-min-width default-size)
|
||
|
|
(send c stretchable-in-x #f)
|
||
|
|
(send c stretchable-in-y #f))])
|
||
|
|
(send p stretchable-in-x #f)
|
||
|
|
(send p stretchable-in-y #f)
|
||
|
|
(set! left-canvas (make-object canvas% car set-car! p))
|
||
|
|
(init left-canvas)
|
||
|
|
(set! right-canvas (make-object canvas% cdr set-cdr! p))
|
||
|
|
(init right-canvas))
|
||
|
|
(let ([w (box 0)]
|
||
|
|
[h (box 0)])
|
||
|
|
(send right-canvas get-client-size w h)
|
||
|
|
(set! canvas-size-diff (- (send right-canvas get-width) (unbox w))))
|
||
|
|
(show #t))))
|
||
|
|
|
||
|
|
(define mesh
|
||
|
|
(begin (when (defined? 'mesh)
|
||
|
|
(send mesh show #f))
|
||
|
|
(make-object mesh%)))
|
||
|
|
'(send mesh open "/home/robby/class/graphics/lab5/test/rd.morph")
|
||
|
|
'(send mesh morph 3)
|