SchemeExt:Edge:circular?

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Contents 1 Action 2 Filename 3 APIs 4 Syntax 5 Argument Types 6 Returns 7 Description 8 Arguments 9 Example

Action

Determines if a scheme-object is a circular-edge.

Filename

scm/scmext/kern/qedg_scm.cpp

APIs

None

Syntax

(edge:circular? object)

Argument Types

Argument	Scheme Data Type
object	scheme-object

Returns

boolean

Description

Returns #t if a scheme-object is a circular-edge; that is, if the curve underlying the edge is a circular ellipse.

Arguments

• object specifies the scheme-object that has to be queried for a circular-edge.

Example

; edge:circular
; Set the view's eye position, target position, and up vector.
(define viewset (view:set (position 0 0 -100) (position 0 0 0) (gvector 1 0 0)))
;; viewset
; Create circular edge 1.
(define edge1 (edge:circular (position 0 0 0) 30 0 90))
;; edge1
; Create circular edge 2.
(define edge2 (edge:circular (position 25 25 0) 20))
;; edge2
; Create circular edge 3.
(define edge3 (edge:circular (position -25 -25 0) 10 180 270))
;; edge3
; Create circular edge 4.
(define edge4 (edge:circular (position -10 -10 0) 15 90 270))
;; edge4
(define zoom (zoom-all))
;; zoom
; OUTPUT Example
;#t