【转帖】representing Closedopen State Of An Entity
 

representing closed/open state of an entity

representing closed/open state of an entity
hi all,
i've one more doubt.
i've a user defined function for creating a polyline, in which the user can give n number of vertices. i've used the oddbface entity for representing the polyline.
for hatching and selection, i need to know whether the polyline, i.e. the vertices in the oddbface entity, representing the polyline is a closed one or not.
my doubt is that, while creating the polyline using the oddbface entity, do we have to explicitly set the open/close flag..?
or
will the function for creating the oddbface enity will implicitly set this flag ?
if the above is the case, then, is it setting the flag based on the starting and ending coordinates.. i.e. if the start and end coordinates are same then its a closed one else an open polyline.
then what will be the flag for the figure in the attachment
figure attached....
please see the attachment...
thanks & regards,
rajesh paramswaran
attached images (4.7 kb, 7 views)

last edited by rajuinnet; 19th august 2004 at 12:26 amfff">.

rajuinnet
# 19th august 2004, 05:18 am

moderator join date: mar 2002
posts: 2,994
oddbface entity is face not polyline. it represents polygon with 4 vertices (if last 2 vertices coincide it's a triangle)
sergey slezkin

sslezkin
# 20th august 2004, 02:45 am

registered user join date: jul 2004
location: india
posts: 82

hi sergey,
thank u for u'r response.
that saved me a lot of time.
thanks & regards,
rajesh parameswaran

rajuinnet

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oddbface entity is face not polyline. it represents polygon with 4 vertices (if last 2 vertices coincide it's a triangle)
sergey slezkin

hi sergey,
thank u for u'r response.
that saved me a lot of time.
thanks & regards,
rajesh parameswaran