Megatest

			(vg:add-obj-to-comp
			 cmp 
			 (vg:make-text-obj (- llx 10)(yfunc minval) (conc minval)))
			(fold 
			 (lambda (next prev)  ;; #(time ? val) #(time ? val)
			   (if prev
			       (let* ((yval       (vector-ref prev 2))
                                      (yval-next  (vector-ref next 2))
				      (last-tval  (tfn   (vector-ref prev 0)))
				      (last-yval  (yfunc yval)) ;; (+ lly (* yscale (vector-ref prev 2))))
                                      (next-yval  (yfunc yval-next))
				      (curr-tval  (tfn   (vector-ref next 0))))
				 (if (>= curr-tval last-tval)
                                     (begin
                                       (vg:add-obj-to-comp
                                        cmp 
                                        ;;(vg:make-rect-obj last-tval lly curr-tval last-yval ;; (- stval 2) lly (+ stval 2)(+ lly (* yval yscale))
                                        (vg:make-line-obj last-tval last-yval curr-tval last-yval
                                                          line-color: stdcolor))
                                       (vg:add-obj-to-comp
                                        cmp 
                                        ;;(vg:make-rect-obj last-tval lly curr-tval last-yval ;; (- stval 2) lly (+ stval 2)(+ lly (* yval yscale))
                                        (vg:make-line-obj curr-tval last-yval curr-tval next-yval
                                                 line-color: stdcolor)))         
				     (print "ERROR: curr-tval is not > last-tval; curr-tval " curr-tval ", last-tval " last-tval))))
			   next)
			 ;; for init create vector tstart,0
			 #f ;; (vector tstart minval minval)
			 dat)
			   
			 ;; (for-each

(use canvas-draw iup foof-loop)
(import canvas-draw-iup)

(load "vg.scm")

(define numtorun 1000)
;; (if (> (length (argv)) 1)
;; 		     (string->number (cadr (argv)))
;; 		     1000))

 (use trace)
 ;; (trace 
 ;;  ;; vg:draw-rect
 ;;  ;; vg:grow-rect
 ;;  vg:get-extents-for-objs
 ;;  vg:components-get-extents
 ;;  vg:instances-get-extents
 ;;  vg:get-extents-for-two-rects
 ;;  canvas-line!)

(define d1 (vg:drawing-new))
(define l1 (vg:lib-new))
(define c1 (vg:comp-new))
(define c2 (vg:comp-new))
(define bt1 (vg:make-rect-obj 10 40 20 50 text: "A long piece of text" font: "Helvetica, -10"))

      
(let ((start (current-seconds)))
  (let loop ((i 0))
    (vg:add-obj-to-comp c1 (vg:make-rect-obj 0 0 100 100))
    (if (< i numtorun)(loop (+ i 1))))
  (print "Run time: " (- (current-seconds) start)))

(vg:add-obj-to-comp c1 (vg:make-line-obj 0 0 100 100))

;; add the c1 component to lib l1 with name firstcomp
(vg:add-comp-to-lib l1 "firstcomp" c1)
(vg:add-comp-to-lib l1 "secondcomp" c2)

;; add the l1 lib to drawing with name firstlib
(vg:add-lib d1 "firstlib" l1)

;; instantiate firstlib/firstcomp as inst1 in drawing d1 at 0,0
(vg:instantiate d1 "firstlib" "firstcomp" "inst1" 0 0)
(vg:instantiate d1 "firstlib" "firstcomp" "inst2" 200 200)


;; (vg:drawing-scalex-set! d1 1.1)
;; (vg:drawing-scaley-set! d1 0.5)

;; (define xtnts (vg:scale-offset-xy 
;; 	       (vg:component-get-extents c1)
;; 	       1.1 1.1 -2 -2))

;;======================================================================

;; get extents, use knowledge of type ...
;;
(define (vg:obj-get-extents drawing obj)
  (let ((type (vg:obj-type obj)))
    (case type
      ((l)(vg:rect-get-extents obj))
      ((r)(vg:rect-get-extents obj))
      ((t)(vg:draw-text drawing obj draw: #f))
      (else #f))))

(define (vg:rect-get-extents obj)
  (vg:obj-pts obj)) ;; extents are just the points for a rectangle

;; with get-extents = #t return the extents
;; with draw = #f don't actually draw the object
;;
(define (vg:draw-obj drawing obj #!key (draw #t))
  ;; (print "obj type: " (vg:obj-type obj))
  (case (vg:obj-type obj)
    ((l)(vg:draw-line drawing obj draw: draw))
    ((r)(vg:draw-rect drawing obj draw: draw))
    ((t)(vg:draw-text drawing obj draw: draw))))

;; given a rect obj draw it on the canvas applying first the drawing
;; scale and offset
;;
(define (vg:draw-rect drawing obj #!key (draw #t))

	(let ((prev-background-color (canvas-background cnv))
	      (prev-foreground-color (canvas-foreground cnv)))
	;; (if fill-color
	;;     (begin
	;; 	(canvas-foreground-set! cnv fill-color)
	;; 	(canvas-box! cnv llx ulx lly uly))) ;; docs are all over the place on this one.;; w h)
	  (if line-color
	      (canvas-foreground-set! cnv line-color))
	     ;; (if fill-color
	     ;;  (canvas-foreground-set! cnv prev-foreground-color)))
	  (canvas-line! cnv llx lly ulx uly)
	  (canvas-foreground-set! cnv prev-foreground-color)
	  (if text 
	      (let* ((prev-font    (canvas-font cnv))
		     (font-changed (and font (not (equal? font prev-font)))))
		(if font-changed (canvas-font-set! cnv font))
		(canvas-text! cnv (+ 2 llx)(+ 2 lly) text)
		(let-values (((xmax ymax)(canvas-text-size cnv text)))