Undefined Value

Value > Special Data Values > Undefined Value

 

   

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The Undefined class implements the value used in uninitialized variables and array members.

There is one distinguished instance of the Undefined class in the reserved system variable undefined .

   

Constructor 

undefined

EXAMPLES 

MyLight = Targetspot pos:[10,20,100] target:(box())
-- check to see if MyLight has a target
if MyLight.target != undefined then
-- distance from light to target
dist=distance MyLight.pos MyLight.target.pos
else
-- distance from light to [0,0,0]
dist=length MyLight.pos
-- set CH_Hand1 to undefined so can test later to see if deleted
--deleteChangeHandler CH_Hand1; CH_Hand1=undefined

See Also

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