/* File: pfexSequence.c
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <Performer/pf.h>
#include <Performer/pfutil.h>
#include <Performer/pfdu.h>
#include <Performer/pfui.h>
#include <Performer/pr.h>
#include <Performer/prmath.h>
#include <pfcave.h>

void pfexInitConverter(char *fname_model);
pfScene *pfexInitScene(int argc, char **argv);
void pfexUpdate(void);

void usage(void)
{
    fprintf(stderr, "usage: pfexLoadModel fname1 ... fnamen\n");
    fprintf(stderr, "       pfexLoadModel [-usage|-help]\n");
    exit(-1);
}

int main(int argc, char **argv)
{
    int i;
    pfScene *scene;

    if (argc < 2 || !strcmp(argv[1], "-usage") || !strcmp(argv[1], "-help"))
	usage();

    pfInit();
    for (i=1; i<argc; i++)
	pfexInitConverter(argv[i]);
    pfCAVEConfig(&argc, argv, NULL);
    pfConfig();
    pfCAVEInitChannels();
    scene = pfexInitScene(argc, argv);
    pfChanScene(pfCAVEMasterChan(), scene);
    while (!CAVEgetbutton(CAVE_ESCKEY)) {
	pfSync();
	pfCAVEPreFrame();
	pfFrame();
	pfCAVEPostFrame();
    }
    pfCAVEHalt();
    pfExit();
}

void pfexInitConverter(char *fname_model)
{
    if (!pfdInitConverter(fname_model)) {
	fprintf(stderr, "Could not init converter for %s\n", fname_model);
	pfExit();
	exit(-1);
    }
}

static pfDCS *g_DCS;

pfScene *pfexInitScene(int argc, char **argv)
{
    int i;
    pfScene *scene;
    pfNode *node;
    pfGeoState *gstate;
    pfLightSource *lightsource;
    pfSequence *seq;

    scene = pfNewScene();

    gstate = pfNewGState(pfGetSharedArena());
    pfGStateMode(gstate, PFSTATE_ENLIGHTING, PF_ON);
    pfGStateMode(gstate, PFSTATE_CULLFACE, PFCF_OFF);
    pfSceneGState(scene, gstate);

    lightsource = pfNewLSource();
    pfAddChild(scene, lightsource);

    seq = pfNewSeq();
    pfAddChild(scene, seq);
    pfSeqDuration(seq, 1.0, -1);

    for (i=1; i<argc; i++) {
	if (node = pfdLoadFile(argv[i])) {
	    pfAddChild(seq, node);
	    if (i<argc-1)
		pfSeqTime(seq, i-1, 0.1);
	    else
		pfSeqTime(seq, i-1, 1.0);
	}
	else {
	    fprintf(stderr, "Could not open %s\n", argv[i]);
	    pfExit();
	    exit(-1);
	}
    }

    pfSeqMode(seq, PFSEQ_START);
    return scene;
}