I would like to find an aesthetically pleasing way to plot a 3D collection

of points f(x,y,z) that are derived from a set of experimentally

determined points on a mesh in three-space. My tentative goal at this

point is to use POVRAY. My question is what is the best way to go about

doing such a thing? e.g. should I use isosurfaces? Can I visualize the

data as a fog and swing the camera around to show different directions?

Any help here would be appreciated as from what I have read so far povray

is a fairly sophisticated tool and the water looks deep! I am

particularly interested in examples (e.g. so I can hack them to fit my

> I would like to find an aesthetically pleasing way to plot a 3D collection

> of points f(x,y,z) that are derived from a set of experimentally

> determined points on a mesh in three-space. My tentative goal at this

> point is to use POVRAY. My question is what is the best way to go about

> doing such a thing? e.g. should I use isosurfaces? Can I visualize the

> data as a fog and swing the camera around to show different directions?

> Any help here would be appreciated as from what I have read so far povray

> is a fairly sophisticated tool and the water looks deep! I am

> particularly interested in examples (e.g. so I can hack them to fit my

You should probably get MegaPOV if you don't already have it, the Mac > of points f(x,y,z) that are derived from a set of experimentally

> determined points on a mesh in three-space. My tentative goal at this

> point is to use POVRAY. My question is what is the best way to go about

> doing such a thing? e.g. should I use isosurfaces? Can I visualize the

> data as a fog and swing the camera around to show different directions?

> Any help here would be appreciated as from what I have read so far povray

> is a fairly sophisticated tool and the water looks deep! I am

> particularly interested in examples (e.g. so I can hack them to fit my

version is here: http://users.skynet.be/smellenbergh/

It has a Carbon version that runs under Mac OS X...

This unofficial version adds isosurfaces, and has media improvements

that will speed rendering.

As for the visualization, it really depends on the type of data you have:

If it is height information over a 2D grid, a height_field object will

suffice...it takes an image as input and creates a surface where the

"height" of each point is determined by the brightness of the

corresponding point on the image.

If it is a mathematical function or a 3D voxel map, an isosurface is

perfect for it...you could also use the function as a density pattern

for media, so you don't get a surface but see the function as varying

densities in smoke or glowing gas. I'd recommend using emitting media,

at least at first...scattering media will be slower and harder to

control. Fog won't be useful for this.

If it is a collection of points...well, fitting a mesh to those points

would be difficult and probably not what you want. You might try a blob

object with a spherical component at the position of each point. You

could also use the blob pattern as a media density pattern...

If it is a mesh, you just need to convert it to something POV can read.

More specific information is needed...

--

<><

I gather from your description that you're basically looking for a way toQuote:> I would like to find an aesthetically pleasing way to plot a 3D

> collection of points f(x,y,z) that are derived from a set of

> experimentally determined points on a mesh in three-space. My

> tentative goal at this point is to use POVRAY.

render voxel-based data. Unfortunately, Povray doesn't support for voxel

rendering in the conventional sense. Short of using a different renderer,

you have three options: plot each point as an object, tessilate your voxel

data into a triangle mesh, or output your data as a .DF3 media density file

for use with media.

--

Coridon Henshaw -- http://www3.sympatico.ca/gcircle/csbh

"..To expect a good deal from life is puerile." -- D.H. Lawrence

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