Simon Bennett (simonb++at++wormald.com.au)
Mon, 3 Feb 1997 10:58:56 +1111 (EST)
Try,
pfFeature(PFFTR_GLSPRITE, PFQFTR_FALSE);
> Hi, all iR users,
>
> the following program makes a billboard, it rotates about viewpoint,
> and i trace to view it. so i should see a still image always.
> it's ok on indigo2 machine(IRIX5.3,PF2.0), but wrong on iR(IRIX6.2,
> PF2.1).
> is it a known bug? or am i missing something?
>
> Thanks for any help.
>
> (please reply befor Feb,4 or after Feb,16. i'l make holiday.)
> liubin
> inca++at++public.bta.net.cn
>
> #include <stdlib.h>
> #include <math.h>
> #include <Performer/pf.h>
>
> #include "/usr/share/Performer/src/pguide/libpf/C/billboard.c"
>
> int
> main (int argc, char *argv[])
> {
> float r = 0.0f, t = 0.0f;
> pfScene *scene;
> pfBillboard *bill;
> pfPipe *p;
> pfPipeWindow *pw;
> pfChannel *chan;
> pfVec3 pos;
> pfCoord view;
>
> pfInit();
> pfMultiprocess( PFMP_DEFAULT );
> pfConfig();
>
> pfSetVec3(pos, 0.0f, 0.0f, 0.0f);
>
> bill = MakeABill(pos, NULL, 3);
>
> scene = pfNewScene();
> pfAddChild(scene, bill);
>
> pfAddChild(scene, pfNewLSource());
>
> p = pfGetPipe(0);
> pw = pfNewPWin(p);
> pfPWinName(pw, "IRIS Performer");
> pfPWinOriginSize(pw, 0, 0, 500, 500);
> pfOpenPWin(pw);
>
> chan = pfNewChan(p);
> pfChanScene(chan, scene);
> pfChanFOV(chan, 60.0f, 0.0f);
>
> /* position viewpoint at (0, -2, 0) */
> pfSetVec3(view.xyz, 0.0f, -2.0f, 0.0f);
> pfChanNearFar(chan, 1.0f, 100.0f);
>
> /* Simulate for twenty seconds. */
> while (t > -20.0f)
> {
> float x,y,z;
> static dir = 1;
>
> pfSync();
> pfFrame();
>
> t = pfGetTime();
> r += dir;
> if(r > 120.0f) dir = -1;
> if(r < -120.0f) dir = 1;
> x = 2.0f*fsin(r*M_PI/180.0f);
> y = 2.0f*fcos(r*M_PI/180.0f) - 2.0f;
> z = 0.0f;
> pfSetVec3(pos, x, y, z);
> pfBboardPos(bill, 0, pos);
> pfSetVec3(view.hpr, -r, 0.0f, 0.0f);
> pfChanView(chan, view.xyz, view.hpr);
> }
>
> pfExit();
> }
>
> =======================================================================
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>
+----------------------------------------------------------------------------+
Simon Bennett simonb++at++wormald.com.au
Wormald Technology Advanced Systems Engineering Ph: +61 2 9981 0669
"Good judgement is the result of experience.
Experience is the result of poor judgement"
=======================================================================
List Archives, FAQ, FTP: http://www.sgi.com/Technology/Performer/
Submissions: info-performer++at++sgi.com
Admin. requests: info-performer-request++at++sgi.com
This archive was generated by hypermail 2.0b2 on Mon Aug 10 1998 - 17:54:33 PDT