comp.lang.idl-pvwave archive
Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado

Home » Public Forums » archive » IDLgrPolygon -TEXTURE_MAP question
Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend 
Return to the default flat view Create a new topic Submit Reply
IDLgrPolygon -TEXTURE_MAP question [message #43846] Thu, 28 April 2005 02:01 Go to previous message
Ulan is currently offline  Ulan
Messages: 8
Registered: April 2005
Junior Member
OK, after applying golden rule - RFM (Read the F..ing Manual) and
looking at the forum, finally I have decided to post my question.
To start with- I am a beginner generally in programming and
particularly in IDL. I could not find solution to following
visualization problem.
I have set of spheres (oOrb). Those spheres are icons representing
regions extracted from images. Each sphere has x,y, time coordinates
and radius proportional to one of the attribute of the region (e.g.
size). There are also tubes connecting those spheres and showing
relationship between regions (continuation, split, merge etc.). I used
IDLgrModel and visualized it in XOBJVIEW. So far it works.
Now, I wanted to add time slider and images to XOBJVIEW that will show
up when user moves the slider. I have done it through IDLgrPolygon
object with texture map property being a grayscale image (see code
below, Input: 3D image (x,y, time)):


for i=0, ntimes-1 do begin
oImage=OBJ_NEW('IDLgrImage', image[*,*,i])

oPoly=obj_new("IDLgrPolygon", number_x, number_y, i ,$
STYLE=2,Texture_Map = oImage,$
Texture_Coord = [[0,0],[0,1], [1,1], [1,0]], HIDE=1)

oModel->Add, oPoly, POSITION=i
Endfor

And in the event_handler I change the property HIDE=1 into HIDE=0
for that slider position.(through POSITION keyword).

Now my question: The resulted image looks black, without any texture. I
have tried to add the COLOR keyword [255,255,255], but it didn't
help. Seems I am missing something simple here, but I am just
lost...That's why I have decided to ask the group. Any help would be
appreciated,

Thanks,
Ulan
[Message index]
 
Read Message
Read Message
Read Message
Previous Topic: pointers and IF statement
Next Topic: Re: limits of 'invert'

-=] Back to Top [=-
[ Syndicate this forum (XML) ] [ RSS ] [ PDF ]

Current Time: Fri Oct 10 13:24:28 PDT 2025

Total time taken to generate the page: 0.48089 seconds