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Comment:Getting extents
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | v1.61
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SHA1: 04f3e0f7d5a2043558074186674578626084d4f6
User & Date: matt on 2016-07-14 03:50:59
Other Links: branch diff | manifest | tags
Context
2016-07-14
23:31
Fixed getting extents check-in: e32e49b9ab user: matt tags: v1.61
03:50
Getting extents check-in: 04f3e0f7d5 user: matt tags: v1.61
2016-07-13
23:05
Fixed points handling for rectangles check-in: 02b5c6c31c user: matt tags: v1.61
Changes
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Modified vg-test.scm from [240549bb15] to [90d7b39a30].

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;; 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 2)









(define cnv #f)
(define the-cnv (canvas 
		 #:size "500x400"
		 #:expand "YES"
		 #:scrollbar "YES"
		 #:posx "0.5"








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;; 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))

(define xtnts (apply vg:grow-rect 10 10 (vg:components-get-extents c1)))
(vg:add-objs-to-comp c1 (apply vg:make-rect xtnts))

(define cnv #f)
(define the-cnv (canvas 
		 #:size "500x400"
		 #:expand "YES"
		 #:scrollbar "YES"
		 #:posx "0.5"
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Modified vg.scm from [42cf0e9697] to [40e90c99ca].

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(define (vg:obj-get-extents obj)
  (let ((type (vg:obj-type obj)))
    (case type
      ((r)(vg:rect-get-extents obj)))))

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








;;======================================================================
;; components
;;======================================================================

;; add obj to comp
;;








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(define (vg:obj-get-extents obj)
  (let ((type (vg:obj-type obj)))
    (case type
      ((r)(vg:rect-get-extents obj)))))

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

(define (vg:grow-rect borderx bordery x1 y1 x2 y2)
  (list
   (- x1 borderx)
   (- y1 bordery)
   (+ x2 borderx)
   (+ y2 bordery)))

;;======================================================================
;; components
;;======================================================================

;; add obj to comp
;;
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;; get component from drawing (look in apropriate lib) given libname and compname
(define (vg:get-component drawing libname compname)
  (let* ((lib  (hash-table-ref (vg:drawing-libs drawing) libname))
	 (inst (hash-table-ref (vg:lib-comps lib) compname)))
    inst))

(define (vg:component-get-extents comp)
  (let ((llx #f)
	(lly #f)
	(ulx #f)
	(uly #f)


	(objs (vg:comp-objs comp)))
    (for-each
     (lambda (obj)
       (let* ((extents (vg:get-extents obj))
	      (ollx    (list-ref extents 0))
	      (olly    (list-ref extents 1))
	      (oulx    (list-ref extents 2))
	      (ouly    (list-ref extents 3)))
	 (if (or (not llx)(< ollx llx))(set! llx ollx))
	 (if (or (not lly)(< olly llx))(set! llx ollx))
	 (if (or (not ulx)(< ollx llx))(set! llx ollx))
	 (if (or (not uly)(< ollx llx))(set! llx ollx))))
     objs)

    (list llx lly ulx uly)))


;;======================================================================
;; libraries
;;======================================================================

;; register lib with drawing









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;; get component from drawing (look in apropriate lib) given libname and compname
(define (vg:get-component drawing libname compname)
  (let* ((lib  (hash-table-ref (vg:drawing-libs drawing) libname))
	 (inst (hash-table-ref (vg:lib-comps lib) compname)))
    inst))

(define (vg:components-get-extents . comps)
  (let ((llx #f)
	(lly #f)
	(ulx #f)
	(uly #f))
    (for-each
     (lambda (comp)
       (let ((objs (vg:comp-objs comp)))
	 (for-each
	  (lambda (obj)
	    (let* ((extents (vg:obj-get-extents obj))
		   (ollx    (list-ref extents 0))
		   (olly    (list-ref extents 1))
		   (oulx    (list-ref extents 2))
		   (ouly    (list-ref extents 3)))
	      (if (or (not llx)(< ollx llx))(set! llx ollx))
	      (if (or (not lly)(< olly lly))(set! lly olly))
	      (if (or (not ulx)(> oulx ulx))(set! ulx oulx))
	      (if (or (not uly)(> ouly uly))(set! uly ouly))))
	  objs)))
     comps)
    (list llx lly ulx uly)))


;;======================================================================
;; libraries
;;======================================================================

;; register lib with drawing
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