/*
 * (c) SPDsoft 1994 + ATIC
 */

#include <stdio.h>

#include <gl/gl.h>
#include <gl/device.h>

#include "menu.h"
#include "version.h"

static char __ident[] = IDENT;
#define VERS_STR        ((char*)&__ident[4])

#define X	0
#define Y	1

#define DDELTA	0.07

#define Boolean int
#define MIN(a,b) ((a)>(b)?(b):(a));
#ifndef M_PI
#  define M_PI          3.14159265358979323846
#endif

void	init_graphics(void);
void	redraw(void);
void    fatalError(char *name,char *str);
Boolean	get_options(int argc,char *argv[]);
void    usage(char *name);

extern char     *optarg;
extern int      optind,opterr;

extern void draw_geom(	Angle alfa, Angle beta, Angle gamma,
						double i_d, int Reset	);

typedef struct {
            Boolean doublebuffer;
            Boolean zbuffer;
            Boolean smooth;
            Boolean AutoSpin;
			long	window_size[2];
			long	window_orig[2];
        }  pref;

typedef struct {
         	int left;   
         	int middle;   
         	int right;   
			Device mdev[2];
			short loc[2];
        }  mouse;

Angle	alfa=0;
Angle	beta=0;
Angle	gamma=0;
Angle	dalfa=10;
pref    G_Prefs;
mouse	G_Mouse;
long	zval;
double	i_d, i_a;
int cheat_flag=1;
Boolean	Reset=FALSE;

int tm=1;

void    fatalError(char *name,char *str)
{
    fprintf(stderr,
    "%s: Fatal Error: %s. bye...\n",name,str);
    exit(-2);
}

main(int argc,char *argv[])
{
	long	gwid;
	long	gw_x, gw_y;
	long	MyEvent;
	long	menuval;
	short	val;
	Boolean	quitting=0;
	Boolean	NeedRedraw=TRUE;
	short	click=0;
	short	first[2];

	char tmpStr[64];


	i_a = i_d = 0.0;

	get_options(argc,argv);
	init_graphics();

	prefsize(300L,300L);
	gwid=winopen("SPDsoft: isoaxis");
	getsize(&G_Prefs.window_size[X],&G_Prefs.window_size[Y]);
	getorigin(&G_Prefs.window_orig[X],&G_Prefs.window_orig[Y]);
	clear();
	RGBmode();
	if(G_Prefs.doublebuffer) doublebuffer();
	gconfig();
	keepaspect(300L,300L);
	winconstraints();
	

	if(G_Prefs.zbuffer)
	{
		lsetdepth(getgdesc(GD_ZMIN),getgdesc(GD_ZMAX));
		zbuffer(TRUE);
		zval=getgdesc(GD_ZMAX);
	}

	if ( G_Prefs.smooth )
	{
		subpixel( TRUE );
		blendfunction(BF_SA, BF_MSA);
/*		blendfunction(BF_MIN_SA_MDA, BF_ONE);*/
		linesmooth( SML_SMOOTHER );
/*		polysmooth(PYSM_ON);*/
	}

	mmode(MVIEWING);

/*	ortho(-2.5,2.5,-2.5,2.5,-2.5,2.5);*/

		
	for (quitting=0;!quitting;)
	{
		while (qtest() || (!NeedRedraw ) )
		{
		/* Event Loop */
		switch(MyEvent=qread(&val))
		{
			case ESCKEY:
				quitting=!val;
				break;

			case ZKEY:
				i_d += DDELTA;
				if(i_d > M_PI) i_d = -M_PI+DDELTA;
				NeedRedraw=TRUE;
				break;

			case XKEY:
				i_d -= DDELTA;
				if(i_d < -M_PI) i_d = M_PI - DDELTA;
				NeedRedraw=TRUE;
				break;

			case AKEY:
				alfa=-dalfa;
				NeedRedraw=TRUE;
				break;

			case SKEY:
				alfa=+dalfa;
				NeedRedraw=TRUE;
				break;

			case QKEY:
				dalfa-=2;
				alfa=+dalfa;
				NeedRedraw=TRUE;
				break;

			case WKEY:
				dalfa+=2;
				alfa=+dalfa;
				NeedRedraw=TRUE;
				break;

			case RKEY:
				polymode(PYM_FILL);
				i_d=0.0;
				alfa=beta=gamma=0;
				Reset=TRUE;
				NeedRedraw=TRUE;
				break;

			case REDRAW:
				NeedRedraw=TRUE;
				break;

			case WINQUIT:
				quitting=1;
				break;

			case INPUTCHANGE:
				break;

			case MOUSEX:  /* mouses' sex ? */
				G_Mouse.loc[X]=val;
				break;
			case MOUSEY:
				G_Mouse.loc[Y]=val;
				break;

			case LEFTMOUSE:
				G_Mouse.left=val;
				click=val;
				break;

			case RIGHTMOUSE:
                if (val) {
                    switch(menuval = dopup(menu[MainMenu]))
					{
                   		case SpinMode:
							G_Prefs.AutoSpin = !G_Prefs.AutoSpin ;
							break;

                   		case Points:
							polymode(PYM_POINT);
							break;
						case Lines:
							polymode(PYM_LINE);
							break;
						case Polygons:
							polymode(PYM_FILL);
							break;
						case Hollow:
							polymode(PYM_HOLLOW);
							break;

						case Restart:
							polymode(PYM_FILL);
							i_d = 0.0;
							alfa=beta=gamma=0;
							Reset = TRUE;
							break;
						case Quit:
							quitting = TRUE;
							break;

						default:
							break;
                    }
					NeedRedraw=TRUE;
                }
                break;


			case MIDDLEMOUSE:
				G_Mouse.middle=val;
				click=val;
				if(click)
				{
					first[X]=getvaluator(MOUSEX);
					first[Y]=getvaluator(MOUSEY);
				}
				NeedRedraw=TRUE;
				break;

			default:
				break;

		} /* switch */

		if (quitting) break;

		} /* while */

		if(G_Mouse.middle)
		{
			beta=(Angle)(
			(G_Mouse.loc[X]-first[X])*1800/(short)G_Prefs.window_size[X]);
			gamma=-(Angle)(
			(G_Mouse.loc[Y]-first[Y])*1800/(short)G_Prefs.window_size[Y]);

			first[X] = G_Mouse.loc[X];
			first[Y] = G_Mouse.loc[Y];

			redraw();
		}
		else
		{
				redraw();
				if(!G_Prefs.AutoSpin) NeedRedraw=FALSE;
		}
	} /* for */

	winclose(gwid);
	return(0);
}

void init_graphics(void)
{
		if(getgdesc(GD_BITS_NORM_DBL_RED)==0)
		{
			fprintf(stderr,"Warning, switching to single buffer mode\n");
			G_Prefs.doublebuffer=0;
		}
			
		if(getgdesc(GD_BITS_NORM_ZBUFFER)==0)
		{
			fprintf(stderr,"Warning, no Z-buffer available\n");
			G_Prefs.zbuffer=0;
		}
			
		qdevice(ZKEY);
		qdevice(XKEY);
		qdevice(AKEY);
		qdevice(SKEY);
		qdevice(QKEY);
		qdevice(WKEY);
		qdevice(RKEY);
		qdevice(ESCKEY);
		qdevice(REDRAW);
		qdevice(WINSHUT);
		qdevice(WINQUIT);
		G_Mouse.mdev[X]=MOUSEX;
		G_Mouse.mdev[Y]=MOUSEY;
		getdev(2,G_Mouse.mdev,G_Mouse.loc);
		qdevice(LEFTMOUSE);
		qdevice(MIDDLEMOUSE);
		qdevice(RIGHTMOUSE);
		qdevice(MOUSEX);
		qdevice(MOUSEY);

		menu[DrawMenu]=defpup(TheMenu[DrawMenu]);
		menu[MainMenu]=defpup(TheMenu[MainMenu],menu[DrawMenu]);
}

void	redraw(void)
{
	long gw_x, gw_y;

	getsize(&gw_x, &gw_y);
	if((G_Prefs.window_size[X]!=gw_x)||(G_Prefs.window_size[Y]!=gw_y))
	{
		viewport(0,gw_x-1,0,gw_y-1);
		G_Prefs.window_size[X]=gw_x;
		G_Prefs.window_size[Y]=gw_y;
	}

	getorigin(&gw_x, &gw_y);
	if((G_Prefs.window_orig[X]!=gw_x)||(G_Prefs.window_orig[Y]!=gw_y))
	{
		G_Prefs.window_orig[X]=gw_x;
		G_Prefs.window_orig[Y]=gw_y;
	}

	if(G_Prefs.zbuffer) czclear(0x000000, zval);
	else
	{
		cpack(0x00000000);
		clear();
	}

			polymode(PYM_LINE);
			tm=2;
	draw_geom(alfa, beta, gamma, i_d, Reset);
			polymode(PYM_FILL);
			tm=1;
	draw_geom(alfa, beta, gamma, i_d, Reset);
	if(!G_Prefs.AutoSpin) alfa=beta=gamma=0;
	Reset=0;

	gflush();

	if(G_Prefs.doublebuffer) swapbuffers();
}

/* ---------------------------------------------------------------*/


Boolean	get_options(int argc,char *argv[])
{
	int opcion;
	int theError=0;

    G_Prefs.doublebuffer=1;
    G_Prefs.zbuffer=1;
	G_Prefs.smooth = 0;
	G_Prefs.AutoSpin = 1;

	while ( (opcion=getopt(argc,argv,"cashdzV")) != EOF )
	{
		switch(opcion)
		{
				case 'c':
						cheat_flag = !cheat_flag;
						break;
				case 'a':
						G_Prefs.AutoSpin = 0;
						break;
				case 'd':
						G_Prefs.doublebuffer = 0;
						break;
				case 'V':
						fprintf(stdout,"%s\n", VERS_STR);
						exit(0);
						break;
				case 'z':
						G_Prefs.zbuffer = 0;
						break;
				case 's':
						G_Prefs.smooth = 1;  /* polysmooth PYSM_ON*/
						if(1!=getgdesc(GD_POLYSMOOTH))
						{
					fprintf(stderr,"Warning: Antialiasing not available\n");
/*					G_Prefs.smooth = 0;*/
						}

						break;
				default:
						usage(argv[0]);
		}
		if ( theError!=0)  usage(argv[0]);
	}
}

void    usage(char *name)
{
    fprintf(stderr,
    "usage: %s [-adzVh]\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",name,
	"-d: disable double buffer",
	"-z: disable z buffer",
	"-s: smooth (still working on it!)",
	"-V: Print version",
	"-a: AutoSpin initially off",
	"-h: This text",
	"Note: z and x flips isoaxis(tm) in and out"
	);
    exit(-1);
}