| Re: Particle represetation [message #35263 is a reply to message #35034] |
Wed, 21 May 2003 22:52  |
Paul Sorenson
Messages: 48
Registered: May 2002
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Member |
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IDL's SURFACE command does not require absolutely regular xy locations. I
don't think IDLgrSurface does either. Also, see the d_surfview.pro demo for
an example displaying a surface (grid) as points rather than lines. (Menu
choice Options|Style|Point.)
If you have very irregular xy locations, you could draw PLOTS points or Orb
objects at each location.
Hope that helps,
-Paul Sorenson
<user@domain.invalid> wrote in message
news:b9gmav$jo3$1@titan.btinternet.com...
> Hi,
>
> Does anyone know of a simple way of creating an _irregularly_ spaced
> particle representation from a _regularly_ spaced grid? I have a 2D
> grid with density values (tends to be close to a Gaussian profile), and
> I then want to represent this using a finite number of point masses,
> each having the same mass, but with a general position. The initial
> density profile will then be represented by the spacing of the points,
> each containing an equal amount of the mass. For some reason I thought
> IDL had routines suitable for this, but I can't seem to find any.
>
> I plan to use these as tracer particles, injected onto a regular grid,
> so I will create a linked list containing a unique particle identifier,
> its position in 3D space, pressure, energy etc., and then it will be
> moved around by the velocity vectors living on the hydro grid.
>
> Any ideas received with thanks,
>
> Henrik
>
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