More GriddedNDSet Questions

[Tom Rink]

Hi Ken, Bill:

I'll see if I can lend a hand here, but it won't likely be until
later this week.

Tom

Kenneth Evans wrote:

>>> If you're ready to compile VisAD from its source…
>
> I thought I was and have done that before. There are two problems:
>
> 1. I am on Windows and when I extracted the new visad_src.jar, there 
> seems to be no Makefile.WinNT in the visad directory.
>
> 2. I recall it didn’t make the visad.jar before. The way I am set up 
> now, it would be easy to replace the JAR file but not easy to set the 
> build path. (The reason is that it is set up as an Eclipse plug-in.) 
> So how do I make the JAR.
>
> The third problem is that I am leaving for Germany and France on 
> Friday (and would like to have this working). Consequently, my time is 
> limited for the trial and error approach.
>
> I can also do Cygwin builds, but I recall that didn’t work before.
>
> Thanks for any help,
>
> -Ken
>
> ------------------------------------------------------------------------
>
> *From:* owner-visad at unidata.ucar.edu 
> [mailto:owner-visad at unidata.ucar.edu] *On Behalf Of *Bill Hibbard
> *Sent:* Sunday, April 15, 2007 3:17 PM
> *To:* Kenneth Evans, Jr.; Visad
> *Subject:* RE: More GriddedNDSet Questions
>
> Ken,
>
> All the evidence you present says that the system is using
> texture mapping with your Linear2DSet and not using texture
> mapping with your Gridded2DDoubleSet (the slowness is
> consistent with not using texture mapping). If you're ready to
> compile VisAD from its source, you could uncomment the
> print statements for the computation of the isTextureMap
> and curvedTexture flags, in the ShadowFunctionOrSetType.java
> file in the visad package. Uncomment two sets of print
> statements, between (at least in the old version of source
> on my home machine) lines 453-477 and lines 713-733.
> It would be a good idea to eliminate all displayed data
> except the Field of interest, so you don't confuse with the
> print output of other data.
>
> Feel free to send the results to the list, and we'll try to
> figure out what's happening.
>
> Good luck,
> Bill
>
> ----- Original Message -----
> From: "Kenneth Evans, Jr."
> To: Visad
> Subject: RE: More GriddedNDSet Questions
> Date: Sat, 14 Apr 2007 12:01:57 -0500
>
>
> Bill,
>
> I am attaching a picture of what I get with the Gridded2DDouble set. 
> They are triangles and don’t extend beyond the plot range, whereas 
> with the Linear2D set, they are pixels and extend .5 pixel beyond the 
> plot boundary (presumably TextureMaps). Moreover, the display is 
> verrry slow in the Gridded2DDouble case. The lines of code that are 
> different in the two cases are:
>
> // Create the domain set
>
> if(xVals2D == null && yVals2D == null) {
>
> // Define a linear domain set with the indices
>
> domainSet = new *Linear2DSet*(xMin, xMax, nX, yMin, yMax, nY);
>
> System./out/.*println*("Linear2DSet");
>
> } else {
>
> xVals1D = new double[1][nX * nY];
>
> yVals1D = new double[1][nX * nY];
>
> xVals1D[0] = VUtils./convert2DArrayTo1DArray/(xVals2D, nY, nX);
>
> yVals1D[0] = VUtils./convert2DArrayTo1DArray/(yVals2D, nY, nX);
>
> domainSet = new *Gridded2DDoubleSet*(domainType, new double[][] {
>
> xVals1D[0], yVals1D[0]}, nX, nY);
>
> System./out/.*println*("Gridded2DDoubleSet");
>
> }
>
> This is from a generic 2D plot class. If you give it x and y values it 
> uses the Gridded2DDoubleSet, otherwise the Linear2DSet. I can send the 
> whole file, if necessary. The domainTypes are defined:
>
> // Define types
>
> xType = RealType./getRealType/(xLabel, null, null);
>
> yType = RealType./getRealType/(yLabel, null, null);
>
> RealType[] domainTypes = new RealType[2];
>
> domainTypes[0] = xType;
>
> domainTypes[1] = yType;
>
> domainType = new *RealTupleType*(domainTypes);
>
> The fact that it is slow is more important to me than that is using 
> triangles.
>
> gmc.getTextureEnable returns true in both cases. I don’t explicitly 
> set it.
>
> The VisAD version is the Jan 07 version.
>
> Thanks,
>
> -Ken
>
> ------------------------------------------------------------------------
>
> *From:* owner-visad at unidata.ucar.edu 
> [mailto:owner-visad at unidata.ucar.edu] *On Behalf Of *Bill Hibbard
> *Sent:* Monday, April 09, 2007 5:46 PM
> *To:* Kenneth Evans, Jr.; Visad
> *Subject:* RE: More GriddedNDSet Questions
>
> Hi Ken,
>
> Pairs of triangles indicate that the system is not using curved
> texture maps. I don't understand why it would use square
> texture maps with your LinearSet and not use curved texture
> maps with your GriddedSet, unless (according to my reading
> of the code in VisAD) you are making transparent surfaces.
> I doubt that sending an image will help.
>
> Good luck,
> Bill
>
> What I see is pairs of triangles when I zoom in. That is probably what 
> a curved texture map looks like? I can send an image if that would 
> help, but I don’t think I am seeing anything unusual. It’s just it is 
> different when using a Gridded2DSet than when using a Linear2DSet, 
> even though the grid data is equivalent.
>
>
>
> -- 
>
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>
> << Gridded2DSet.Triangles.png >>
>
>
> -- 
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>

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