| Object graphics bug? [message #9421] |
Fri, 27 June 1997 00:00  |
Patrick Jones
Messages: 1
Registered: June 1997
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Junior Member |
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I am using IDL 5.0 on Win95.
I have been unable to get an image object to display in a window object.
Case 1: I have a 512x512 byte array called theImage, which holds image
data from a single-band file. The array displays properly using direct
graphics (tv, theImage). But when I try to display the image using
object graphics (following the example on p. 102 of the Objects manual),
my window remains completely black.
Case 2: Thinking that I have screwed up the object definitions, I follow
the 'rose.jpg' example on p. 102 to the letter. Still the image does
not display using object graphics (although tv, theImage[0,*,*]
correctly
displays the red 'band' of the image).
case 3: Thinking that the image object is at fault, I follow, to the
letter, the example "A Very Simple Plot", on p. 40 of the Objects
manual.
This also fails to display.
Is anyone else having this problem? I really don't think that I'm
making
any mistakes.
Example of problem code:
; myImage is a 512x512 byte array that displays correctly with tv
myWindow = obj_new('IDLgrWindow', dimensions=[512,512])
myView = obj_new('IDLgrView', view=[0,0,512,512])
myModel = obj_new('IDLgrModel')
myImage = obj_new('IDLgrImage', imageData)
myView->add, myModel
myModel->add, myImage
myWindow->draw, myView ; this fails; no image is displayed
tv, myImage ; this displays properly
Thanks in advance for help.
Pat Jones
--
Department of Anthropology
Tulane University
NO LA 70118
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