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Initial check-in based on OpenGL Performer 2.4 tree.
-flynnt

//
// Copyright 1997, Silicon Graphics, Inc.
// ALL RIGHTS RESERVED
//
// This source code ("Source Code") was originally derived from a
// code base owned by Silicon Graphics, Inc. ("SGI")
// 
// LICENSE: SGI grants the user ("Licensee") permission to reproduce,
// distribute, and create derivative works from this Source Code,
// provided that: (1) the user reproduces this entire notice within
// both source and binary format redistributions and any accompanying
// materials such as documentation in printed or electronic format;
// (2) the Source Code is not to be used, or ported or modified for
// use, except in conjunction with OpenGL Performer; and (3) the
// names of Silicon Graphics, Inc.  and SGI may not be used in any
// advertising or publicity relating to the Source Code without the
// prior written permission of SGI.  No further license or permission
// may be inferred or deemed or construed to exist with regard to the
// Source Code or the code base of which it forms a part. All rights
// not expressly granted are reserved.
// 
// This Source Code is provided to Licensee AS IS, without any
// warranty of any kind, either express, implied, or statutory,
// including, but not limited to, any warranty that the Source Code
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// 
// Contact information:  Silicon Graphics, Inc., 
// 1600 Amphitheatre Pkwy, Mountain View, CA  94043, 
// or:  http://www.sgi.com
//
//
// fluxed_gset.C: example of a pfFlux containing pfGeoSets
//
// $Revision: 1.1 $
// $Date: 2000/11/21 21:39:38 $
//



#include <stdlib.h>

#include <Performer/pf/pfChannel.h>
#include <Performer/pf/pfNode.h>
#include <Performer/pf/pfScene.h>
#include <Performer/pf/pfLightSource.h>
#include <Performer/pf/pfGeode.h>
#include <Performer/pr/pfGeoSet.h>
#include <Performer/pr/pfGeoState.h>
#include <Performer/pr/pfLinMath.h>
#include <Performer/pr/pfFlux.h>


#include <Performer/pfutil.h>
#include <Performer/pfdu.h>


//
// globals
//
pfFlux *fluxed_gset;


//
// local prototypes
//
static int make_fluxed_gset(pfFluxMemory *fmem);
static pfGeode *make_fluxed_gset_geode(void);
static void change_prim_count(void);


int
main (int argc, char *argv[])
{
    float t = 0.0f;

    // Initialize Performer
    pfInit();

    // Use multiprocessing mode
    pfMultiprocess( PFMP_APP_CULL_DRAW );

    // initiate multi-processing mode set in pfMultiprocess call
    // FORKs for Performer processes,  CULL and DRAW, etc. happen here.
    //
    pfConfig();

    pfGeode *geode = make_fluxed_gset_geode();

    // Attach geode to a new pfScene
    pfScene *scene = new pfScene;
    scene->addChild(geode);

    // Configure and open GL window
    pfPipe *p = pfGetPipe(0);
    pfPipeWindow *pw = new pfPipeWindow(p);
    pw->setWinType(PFPWIN_TYPE_X);
    pw->setName("OpenGL Performer");
    pw->setOriginSize(0,0,500,500);
    pw->open();

    // Create and configure a pfChannel.
    pfChannel *chan = new pfChannel(p);
    chan->setScene(scene);
    chan->setFOV(45.0f, 0.0f);
    chan->setNearFar(1.0f, 10.0f);

    // Simulate for twenty seconds.
    while (t < 20.0f)
    {
	// Change the colors in the pfFlux.
	change_prim_count();

	// Go to sleep until next frame time.
	pfSync();

	// Initiate cull/draw for this frame.
	pfFrame();

	t = pfGetTime();
    }

    // Terminate parallel processes and exit
    pfExit();
    return 0;
}


static int make_fluxed_gset(pfFluxMemory *fmem)
{
    pfVec3 *coords;
    pfGeoState *gstate;
    pfGeoSet *gset;
    int i;
    float s, c;

    if (fmem == NULL)
	return pfFluxedGSetInit(fmem);

    pfFluxedGSetInit(fmem);

    gset = (pfGeoSet*)fmem->getData();

    coords = (pfVec3 *)pfMemory::malloc(sizeof(pfVec3) * 3 * 36,
					pfGetSharedArena());
    pfSinCos(0.0f, &s, &c);
    for (i = 0; i < 36; i++)
    {
	PFSET_VEC3(coords[i*3+0], 0.0f, 3.0f, 0.0f);
	PFSET_VEC3(coords[i*3+1],    c, 3.0f,    s);
	pfSinCos((i+1)*10.0f, &s, &c);
	PFSET_VEC3(coords[i*3+2],    c, 3.0f,    s);
    }

    gstate = new pfGeoState();
    gstate->setMode(PFSTATE_ENLIGHTING, PF_OFF);
    gstate->setMode(PFSTATE_ENTEXTURE, PF_OFF);
    gstate->setMode(PFSTATE_CULLFACE, PFCF_OFF);

    gset->setPrimType(PFGS_TRIS);
    gset->setNumPrims(36);
    gset->setAttr(PFGS_COORD3, PFGS_PER_VERTEX, coords, NULL);
    gset->setGState(gstate);

    return 0;
}


static pfGeode *make_fluxed_gset_geode(void)
{
    pfGeode *geode;
    pfGeoSet *gset;

    fluxed_gset = new pfFlux(make_fluxed_gset, PFFLUX_DEFAULT_NUM_BUFFERS);

    gset = (pfGeoSet*)fluxed_gset->getCurData();

    geode = new pfGeode();
    geode->addGSet(gset);

    return geode;
}


static void change_prim_count(void)
{
    static int count = 0;
    pfGeoSet *gset;

    gset = (pfGeoSet*)fluxed_gset->getWritableData();

    gset->setNumPrims(count % 36 + 1);

    fluxed_gset->writeComplete();

    count++;
}