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From: naughton@wind.Eng.Sun.COM (Patrick Naughton)
Newsgroups: comp.sys.sgi,comp.graphics
Subject: Re: Meta-Ball Rendering anyone?
Message-ID: <8046@exodus.Eng.Sun.COM>
Date: 15 Feb 91 20:21:18 GMT
References: <84263@sgi.sgi.com> <1991Feb8.094953@anusf.anu.edu.au> <1991Feb13.114334.86303@vaxc.cc.monash.edu.au>
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Reply-To: naughton@wind.Eng.Sun.COM (Patrick Naughton)
Followup-To: comp.sys.sgi
Organization: Sun Microsystems, Inc. - Mountain View, CA
Lines: 108

phs424l@vaxc.cc.monash.edu.au writes:
|> 
|>  drw900@anusf.anu.edu.au ("Drew R Whitehouse") writes:
|> > |> /*
|> > |>  *	Hi - 
|> > |>  *	 	I've been trying to get this Meta-Ball renderer
|> > |>  *	to work for me with no success.  Does anyone out there
|> > |>  *	know of a public domain Meta-Ball renderer, or does 
|> > |>  *	anyone know how to make this program stop core dumping?
|> > 
|> > 
|> > 
|> > 	Here's something to try out, it produces a picture - I'm not
|> > sure if this was what they looked like in the article !!
|> 
|> Is this for a Silicon Graphics machine?  If not, what?
|> Daf.
|> -- 
|> -------------------------------------------------------------------------------
|> Davyd Norris		:	"Strange people physicists... In my opinion
|> Physics Dept.		:	 those that aren't already dead are in some
|> Monash University,	:        way very, very sick." - Douglas Adams,
|> Vic, Australia.		:	 "The Long Dark Tea-time Of The Soul"     
|> -------------------------------------------------------------------------------


Yes it is for the SGI as is... but link it with this file and it will run on X11.
(You'll need a 24 bit screen to make it work well...:-)


#include <X11/Xlib.h>

Display    *dpy = 0;
int         screen;
Colormap    cmap;
GC          gc;
Window      win;
int         winw;
int         winh;

void
prefsize(w, h)
{
    winw = w;
    winh = h;
}

void
winopen(name)
    char       *name;
{
    dpy = XOpenDisplay(0);
    screen = DefaultScreen(dpy);
    cmap = DefaultColormap(dpy, screen);
    gc = DefaultGC(dpy, screen);
    win = XCreateSimpleWindow(dpy, RootWindow(dpy, screen), 0, 0, winw, winh, 1, 0);
    XSelectInput(dpy, win, ExposureMask);
    XStoreName(dpy, win, name);
    XMapWindow(dpy, win);
    while (1) {
	XEvent      ev;
	XNextEvent(dpy, &ev);
	if (ev.type == Expose)
	    break;
    }
}

void
RGBmode()
{
}

void
gconfig()
{
}

void
RGBcolor(r, g, b)
{
    XColor      color;

    color.pixel = 0;
    color.red = r << 8;
    color.green = g << 8;
    color.blue = b << 8;
    color.flags = DoRed | DoGreen | DoBlue;
    XAllocColor(dpy, cmap, &color);
    XSetForeground(dpy, gc, color.pixel);
}

void
clear()
{
    XFillRectangle(dpy, win, gc, 0, 0, winw, winh);
}

pnt2i(v, w)
    int         v;
    int         w;
{
    XDrawPoint(dpy, win, gc, v, w);
}

-- 
    ______________________________________________________________________
    Patrick J. Naughton				   email: naughton@sun.com
    Sun Labs					   vmail: (415) 336 - 1080