| object graphics and IDL >= 8.2 [message #89948] |
Wed, 07 January 2015 12:37  |
natha
Messages: 482
Registered: October 2007
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Senior Member |
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Hi guys,
I was trying to re-compile an old object-grahics code with IDL 8.3 and the result is awful. Instances of IDLgrText do not appear and all IDLgrAxis "explode".
When I use IDL 7.0 - 8.1 everything goes well, the problems appear when I use IDL 8.2.
I was able to reproduce a similar problem with the following code that I found in an old thread:
h = double(HANNING(100,100)*2.3e-13)
s = surface(h,COLOR='black', style=1, CLIP=0)
It seems that this graphical issue was tagged as a bug (IDL-68998) but it has not been fixed yet.
The problem appears on my Linux machine but not on my Mac.
Do you have any idea of why object graphics behave differently in IDL 8.2?
Similar problem here:
https://groups.google.com/forum/#!searchin/comp.lang.idl-pvw ave/IDL$208.2$20object$20graphics/comp.lang.idl-pvwave/TE-Li NHMrbI/01nu5bzeXY0J
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| Re: object graphics and IDL >= 8.2 [message #89954 is a reply to message #89949] |
Thu, 08 January 2015 18:11  |
penteado
Messages: 866
Registered: February 2018
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Senior Member
Administrator |
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I have seen this problem in the past (I do not remember which IDL version), when the scale of the z axis is several orders of magnitude different from the x/y scale, as is the case in the example you gave. I agree it seems to be a problem in the OpenGL rendering, though I do not know whether it would be a bug in IDL or the graphics driver.
Since software rendering was too slow, I resorted to multiplying the Z values by some number in order to bring them to the same scale as the x/y values.
FYI, I tried the example you gave in my computer (IDL 8.3, Linux, NVIDIA card with proprietary driver), and it worked in hardware rendering.
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