ray?

List of:	Scheme Extensions
Subjects:	Ray Testing
Contents:	Kernel

Action:

Determines if a Scheme object is a ray.

Filename:

kern/kern_scm/ray_scm.cxx

Syntax:

(ray? object)

Arg Types:

object

scheme-object

Returns:

boolean

object specifies the scheme-object to be queried for a ray.

Example:

; ray?

; Create a ray.

(define ray1 (ray (position -5 -5 -5)

(gvector 1 0 0)))

;; ray1

; Determine if the ray is actually a ray.

(ray? ray1)

;; #t

; Determine if a position is a ray.

(ray? (position 0 0 0))

;; #f

PDF/KERN/15SCR.PDF
HTM/DATA/KERN/KERN/15SCR/0006.HTM