mupika Forum Newbie Got Viz? Posts: 7

animate a trace 01/06/10 at 15:36:39   Hi,   i'm just getting used to learning how to create things on my own in dx and i was wondering if it were possible to animate a trace or an xy plot in dx.   I am trying to create a EKG movie but i am having a difficult time even plotting the trace in DX.   I have tried the import data method as well as just creating a VPE myself.   Thanks for the help.   mupika

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joelr OpenDX Forum Administrator Got Viz? Posts: 388

Re: animate a trace Reply #1 - 01/07/10 at 10:41:03   Hi Mupika,   Yes, you can definitely do animations in dx. The key is to drive your net with one of the looping modules (Sequencer, ForEachMember, ForEachN), whose output affects the image in some way, e.g., changing a coordinate, or an isosurface value, or...  My advice is to first get familiar with the Sample programs that do looping and animation (Accumulate.net, Bounce.net,   ContoursAndCaption.net, MovingCamera.net). Once you are familiar with how looping works in dx, you'll have a much better idea how to do your own animations. If you still have questions, please post 'em!   Cheers, Joel

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mupika Forum Newbie Got Viz? Posts: 7	Re: animate a trace Reply #2 - 01/29/10 at 13:43:56   Hi everyone,   thank you for the reply.  I'm tyring to start of simple with just plotting the actual trace instead of animating it.  I'm using import spreadsheet but when i output the data to an input for plot, its saying the data is missing.   Should i use search first or can anyone help me out with this one?   Thank you.   mupika
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joelr OpenDX Forum Administrator Got Viz? Posts: 388

Re: animate a trace Reply #3 - 02/01/10 at 04:59:26   When you use ImportSpreadsheet, it outputs a field whose components are named the same as your table columns (or, if there are no column names, it uses "column0", "column1", ...)   The Plot module wants a field with a "positions" component containing the x-coordinates, and a "data" component containing the y-coordinates.   So, to plot your data, you need to alter the field. Suppose your x-coordinates are in column "traceX" and y is in "traceY":   ImportSpreadsheet -> Rename("traceX","positions") -> Rename("traceY", "data") -> Plot   Cheers, Joel

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mupika Forum Newbie Got Viz? Posts: 7

Re: animate a trace Reply #4 - 02/19/10 at 15:01:27   Thanks Joel.  That worked perfectly, sorry for the extrememly staggered nature of my replies.  This has been on and off for me.   In order to animate i am just using the sequence to change my xmax on the import and it works beautifully.   I have one last question though.  Is there anyway I can thicken the line created by the plot?   I'm not sure which of these options here controls that.  none of them actually seem to correspond to it.

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joelr OpenDX Forum Administrator Got Viz? Posts: 388

Re: animate a trace Reply #5 - 02/19/10 at 18:45:25   As far as I know, Plot has no options to control line thickness. You might be able to extract the line from the group output by Plot, run it through Ribbon and then put it back. Another approach would be to 'roll your own' - construct the line yourself, pass it through Ribbon, then AutoAxes. To construct the line: extract traceX and traceY and pass them to the a and b inputs, respectively, of a Compute, with the expression "float([a,b])". Connect the compute output to the origin input of a Construct. Then  --> Color(as you wish) --> Ribbon --> AutoAxes -->   Cheers, Joel

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mupika Forum Newbie Got Viz? Posts: 7	Re: animate a trace Reply #6 - 05/11/10 at 14:23:53   Hi everyone,   I have one more question.  So I need to make a little time bar under my ekg that represents, let's say, 2 secs, that can be used as a reference to how long the simulation is running.  Is there anyway to do that?   Thanks for all the help!
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joelr OpenDX Forum Administrator Got Viz? Posts: 388	Re: animate a trace Reply #7 - 05/12/10 at 03:47:18   Sure... here's a generic recipe for creating a colored bar of a desired size at a desired location: create a unit line segment, color it, and pass it through ribbon to create a 'bar'. Then scale to the desired size and translate to its final location.   Construct(origin={[0,0],[1,0]}) -> Color -> Ribbon -> Scale -> Translate   Cheers, Joel
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mupika Forum Newbie Got Viz? Posts: 7

Re: animate a trace Reply #8 - 08/06/10 at 15:43:18   Hi everyone,   I had a question about if statements.   I'm visualizing a 3d sheet of excitable media and I want to place an asterisk next to a section of the sheet and have it match the color to that section of the tissue.  I can't seem to find a way to reassign my data to value the caption and color my asterisk.   I can't really think of a solution to this. any help please?

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joelr OpenDX Forum Administrator Got Viz? Posts: 388

Re: animate a trace Reply #9 - 08/09/10 at 03:55:54   In general, to sample a field at specific points (to get data or color or whatever) you can use Map. In your case, you want the color at a specific point, so Mark("colors") and pass it to the 'map' input of Map. Pass the point you want to sample as the 'input' input. The output will be the color at that point, which you can then use to Color your Caption or Text field.

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mupika Forum Newbie Got Viz? Posts: 7	Re: animate a trace Reply #10 - 08/17/10 at 14:25:57   so this is what i have set up right now,   I have my import -> Mark(input) -> Map(map) -> Color(color)      and text -> color (input)   i set the point i want to sample to Map(input) and i named Mark "colors" but it says that my import is not a field.  Thanks for the help joelr.
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joelr OpenDX Forum Administrator Got Viz? Posts: 388	Re: animate a trace Reply #11 - 08/18/10 at 04:24:01   It would be easier if you attached your net. I can't really tell from your description.   --Joel
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mupika Forum Newbie Got Viz? Posts: 7	Re: animate a trace Reply #12 - 08/18/10 at 13:47:39   here is my net.  I am trying to image a piece of heart tissue the placing a asterisk which will color according to one cell in the tissue.
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joelr OpenDX Forum Administrator Got Viz? Posts: 388	Re: animate a trace Reply #13 - 08/19/10 at 03:51:23   Hmmm...I guess I need the data, too! Or at least a sample, so I can see what the error is.   By the way, when you get errors like "Input is not a field", you can add a Print to find out what it is.
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