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I'm having a think about how best to do plasma globes. I have a few ideas in the
pipeline, but here's a relatively simple way of getting most of the way there: a
density function in media.
This scene uses a macro that creates a plasma globe, which is called inside
loops to create the array of pillars and globes.
The pillars use a macro that scales the f_rounded_box isosurface function to
allow it to be used with any size of radius and box (not just the 0..1 range
allowed by the function by default). I might post that macro at a later date,
as it removes the unexpected behaviours of the standard function.
I'm currently working on a way of generating the glowing filaments (core to
shell), and will post some examples of this at a later date. In the meantime,
here's the media example...
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Attachments:
Download 'block007e_plasmaglobes_1200.jpg' (412 KB)
Preview of image 'block007e_plasmaglobes_1200.jpg'
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I forgot to mention the main feature of this image...
This scene uses radiosity, and the globes are the only light sources, being
emitting media sources. This is just like creating a radiosity light from an
object having ambient colour.
All the rounded boxes are neutral, the colour coming from the plasma globes.
Personally, I really like this type of effect.
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"MessyBlob" <nomail@nomail> wrote:
> I'm currently working on a way of generating the glowing filaments (core to
> shell)
Using plain media functions will be difficult for these, unless you use very
high-qualty settings.
Chains of blobs come to my mind.
Post a reply to this message
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"clipka" <nomail@nomail> wrote:
> "MessyBlob" <nomail@nomail> wrote:
> > I'm currently working on a way of generating the glowing filaments (core to
> > shell)
>
> Using plain media functions will be difficult for these, unless you use very
> high-qualty settings.
>
> Chains of blobs come to my mind.
I was thinking of using geometry rather than media density functions for the
filaments, so yes, blobs would be one answer, and they could branch tree-like
for varied effects. I was thinking of trying distorted lathe functions too:
they would widen and change colour at each end of the filament, which
necessitates using an isosurface - then putting media in that.
I've not done that yet, but I have determined a good random spread of starting
points on the core (using a 'proximity array' technique that I discussed in the
ill-fated "trace()" discussion in the v4.0 threads!), so I'm halfway there.
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From: Paolo Gibellini
Subject: Re: Plasma Globes project (Beta 31 and later)
Date: 20 Apr 2009 11:32:06
Message: <49ec9576$1@news.povray.org>
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A cool wallpaper for this Christmas
;-)
Paolo
>MessyBlob on date 11/04/2009 00:47 wrote:
> I'm having a think about how best to do plasma globes. I have a few ideas in the
> pipeline, but here's a relatively simple way of getting most of the way there: a
> density function in media.
>
> This scene uses a macro that creates a plasma globe, which is called inside
> loops to create the array of pillars and globes.
>
> The pillars use a macro that scales the f_rounded_box isosurface function to
> allow it to be used with any size of radius and box (not just the 0..1 range
> allowed by the function by default). I might post that macro at a later date,
> as it removes the unexpected behaviours of the standard function.
>
> I'm currently working on a way of generating the glowing filaments (core to
> shell), and will post some examples of this at a later date. In the meantime,
> here's the media example...
>
>
> ------------------------------------------------------------------------
>
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