src/px/xshowtrace.c

/* Copyright (c) 1991 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 *  Display an image and watch the rays get traced.
 *
 *      9/21/90 Greg Ward
 */

#include "standard.h"
#include "view.h"
#include <X11/Xlib.h>

#define MAXDEPTH        32              /* ridiculous ray tree depth */

char    rtcom[] = "rtrace -h- -otp -fa -x 1";
char    xicom[] = "ximage";

VIEW    ourview = STDVIEW;              /* view for picture */
int     xres, yres;

char    *progname;                      /* program name */

char    *picture;                       /* picture name */

FILE    *pin;                           /* input stream */

Display *theDisplay = NULL;             /* connection to server */

struct node {                           /* ray tree node */
        FVECT   ipt;
        struct node     *sister;
        struct node     *daughter;
};

#define newnode()       (struct node *)calloc(1, sizeof(struct node))

int     slow = 0;               /* slow trace? */


main(argc, argv)                /* takes both the octree and the image */
int     argc;
char    *argv[];
{
        int     i;
        char    combuf[256];

        progname = argv[0];
        for (i = 1; i < argc-2; i++)
                if (!strcmp(argv[i], "-s"))
                        slow++;
                else
                        break;
        if (i > argc-2) {
                fprintf(stderr, "Usage: %s [-s] [rtrace args] octree picture\n",
                                progname);
                exit(1);
        }
        picture = argv[argc-1];
                                        /* get the viewing parameters */
        if (viewfile(picture, &ourview, &xres, &yres) <= 0 ||
                        setview(&ourview) != NULL) {
                fprintf(stderr, "%s: cannot get view from \"%s\"\n",
                                progname, picture);
                exit(1);
        }
                                        /* open the display */
        if ((theDisplay = XOpenDisplay(NULL)) == NULL) {
                fprintf(stderr,
                "%s: cannot open display; DISPLAY variable set?\n",
                                progname);
                exit(1);
        }
                                        /* build input command */
        sprintf(combuf, "%s %s | %s", xicom, picture, rtcom);
        for ( ; i < argc-1; i++) {
                strcat(combuf, " ");
                strcat(combuf, argv[i]);
        }
                                        /* start the damn thing */
        if ((pin = popen(combuf, "r")) == NULL)
                exit(1);
                                        /* loop on input */
        mainloop();

        exit(0);
}


mainloop()                              /* get and process input */
{
        static struct node      *sis[MAXDEPTH];
        register struct node    *newp;
        char    buf[128];
        int     level;
        register int    i;

        level = 0;
        while (fgets(buf, sizeof(buf), pin) != NULL) {
                if ((newp = newnode()) == NULL) {
                        fprintf(stderr, "%s: memory error\n", progname);
                        return;
                }
                for (i = 0; buf[i] == '\t'; i++)
                        ;
                if (strtoipt(newp->ipt, buf+i) < 0) {
                        fprintf(stderr, "%s: bad read\n", progname);
                        return;
                }
                newp->sister = sis[i];
                sis[i] = newp;
                if (i < level) {
                        newp->daughter = sis[level];
                        sis[level] = NULL;
                }
                level = i;
                if (i == 0) {
                        setvec(sis[0]->ipt);
                        tracerays(sis[0]);
                        freetree(sis[0]);
                        sis[0] = NULL;
                        if (!slow)
                                XFlush(theDisplay);
                }
        }
}


freetree(tp)                            /* free a trace tree */
struct node     *tp;
{
        register struct node    *kid;

        for (kid = tp->daughter; kid != NULL; kid = kid->sister)
                freetree(kid);
        free((char *)tp);
}


tracerays(tp)                           /* trace a ray tree */
struct node     *tp;
{
        register struct node    *kid;

        for (kid = tp->daughter; kid != NULL; kid = kid->sister) {
                vector(tp->ipt, kid->ipt);
                tracerays(kid);
        }
}


strtoipt(ipt, str)              /* convert string x y z to image point */
FVECT   ipt;
char    *str;
{
        FVECT   pt;

        if (sscanf(str, "%lf %lf %lf", &pt[0], &pt[1], &pt[2]) != 3)
                return(-1);
        viewloc(ipt, &ourview, pt);
        return(0);
}


#define rwind           RootWindow(theDisplay,ourScreen)
#define ourScreen       DefaultScreen(theDisplay)

GC      vecGC = 0;
Window  gwind = 0;
int     xoff, yoff;


setvec(ipt)                     /* set up vector drawing for pick */
double  ipt[2];
{
        XWindowAttributes       wa;
        XColor  xc;
        XGCValues       gcv;
        int     rx, ry, wx, wy;
        Window  rw, cw;
        unsigned int    pm;
                                        /* compute pointer location */
        if (gwind == 0 &&
                (gwind = xfindwind(theDisplay, rwind, picture, 2)) == 0) {
                fprintf(stderr, "%s: cannot find display window!\n", progname);
                exit(1);
        }
        XQueryPointer(theDisplay, gwind, &rw, &cw, &rx, &ry, &wx, &wy, &pm);
        xoff = wx - ipt[0]*xres;
        yoff = wy - (1.-ipt[1])*yres;
                                        /* set graphics context */
        if (vecGC == 0) {
                XGetWindowAttributes(theDisplay, gwind, &wa);
                xc.red = 65535; xc.green = 0; xc.blue = 0;
                xc.flags = DoRed|DoGreen|DoBlue;
                if (XAllocColor(theDisplay, wa.colormap, &xc)) {
                        gcv.foreground = xc.pixel;
                        vecGC = XCreateGC(theDisplay,gwind,GCForeground,&gcv);
                } else {
                        gcv.function = GXinvert;
                        vecGC = XCreateGC(theDisplay,gwind,GCFunction,&gcv);
                }
        }
}


vector(ip1, ip2)                /* draw a vector */
double  ip1[2], ip2[2];
{
        XDrawLine(theDisplay, gwind, vecGC,
                        (int)(ip1[0]*xres)+xoff, (int)((1.-ip1[1])*yres)+yoff,
                        (int)(ip2[0]*xres)+xoff, (int)((1.-ip2[1])*yres)+yoff);
        if (slow) {
                XFlush(theDisplay);
                sleep(1);
        }
}
Revision:	1.7
Committed:	Mon Nov 11 14:01:49 1991 UTC (32 years, 5 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.6:	+5 -3 lines
Log Message:	Improved handling of scanline ordering
#	User	Rev	Content
1	greg	1.7	/* Copyright (c) 1991 Regents of the University of California */
2
3	greg	1.1	#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* Display an image and watch the rays get traced.
9			*
10			* 9/21/90 Greg Ward
11			*/
12
13			#include "standard.h"
14			#include "view.h"
15			#include <X11/Xlib.h>
16
17			#define MAXDEPTH 32 /* ridiculous ray tree depth */
18
19	greg	1.6	char rtcom[] = "rtrace -h- -otp -fa -x 1";
20			char xicom[] = "ximage";
21	greg	1.1
22			VIEW ourview = STDVIEW; /* view for picture */
23			int xres, yres;
24
25			char progname; / program name */
26
27	greg	1.5	char picture; / picture name */
28
29	greg	1.1	FILE pin; / input stream */
30
31			Display theDisplay = NULL; / connection to server */
32
33			struct node { /* ray tree node */
34	greg	1.7	FVECT ipt;
35	greg	1.1	struct node *sister;
36			struct node *daughter;
37			};
38
39			#define newnode() (struct node *)calloc(1, sizeof(struct node))
40
41	greg	1.2	int slow = 0; /* slow trace? */
42	greg	1.1
43	greg	1.2
44	greg	1.1	main(argc, argv) /* takes both the octree and the image */
45			int argc;
46			char *argv[];
47			{
48			int i;
49			char combuf[256];
50
51			progname = argv[0];
52	greg	1.2	for (i = 1; i < argc-2; i++)
53			if (!strcmp(argv[i], "-s"))
54			slow++;
55			else
56			break;
57			if (i > argc-2) {
58			fprintf(stderr, "Usage: %s [-s] [rtrace args] octree picture\n",
59	greg	1.5	progname);
60	greg	1.1	exit(1);
61			}
62	greg	1.5	picture = argv[argc-1];
63	greg	1.1	/* get the viewing parameters */
64	greg	1.5	if (viewfile(picture, &ourview, &xres, &yres) <= 0 \|\|
65	greg	1.1	setview(&ourview) != NULL) {
66			fprintf(stderr, "%s: cannot get view from \"%s\"\n",
67	greg	1.5	progname, picture);
68	greg	1.1	exit(1);
69			}
70			/* open the display */
71			if ((theDisplay = XOpenDisplay(NULL)) == NULL) {
72			fprintf(stderr,
73			"%s: cannot open display; DISPLAY variable set?\n",
74	greg	1.5	progname);
75	greg	1.1	exit(1);
76			}
77			/* build input command */
78	greg	1.5	sprintf(combuf, "%s %s \| %s", xicom, picture, rtcom);
79	greg	1.2	for ( ; i < argc-1; i++) {
80	greg	1.1	strcat(combuf, " ");
81			strcat(combuf, argv[i]);
82			}
83			/* start the damn thing */
84			if ((pin = popen(combuf, "r")) == NULL)
85			exit(1);
86			/* loop on input */
87			mainloop();
88
89			exit(0);
90			}
91
92
93			mainloop() /* get and process input */
94			{
95			static struct node *sis[MAXDEPTH];
96			register struct node *newp;
97			char buf[128];
98			int level;
99			register int i;
100
101			level = 0;
102			while (fgets(buf, sizeof(buf), pin) != NULL) {
103			if ((newp = newnode()) == NULL) {
104			fprintf(stderr, "%s: memory error\n", progname);
105			return;
106			}
107			for (i = 0; buf[i] == '\t'; i++)
108			;
109			if (strtoipt(newp->ipt, buf+i) < 0) {
110			fprintf(stderr, "%s: bad read\n", progname);
111			return;
112			}
113			newp->sister = sis[i];
114			sis[i] = newp;
115			if (i < level) {
116			newp->daughter = sis[level];
117			sis[level] = NULL;
118			}
119			level = i;
120			if (i == 0) {
121			setvec(sis[0]->ipt);
122			tracerays(sis[0]);
123			freetree(sis[0]);
124			sis[0] = NULL;
125	greg	1.2	if (!slow)
126			XFlush(theDisplay);
127	greg	1.1	}
128			}
129			}
130
131
132			freetree(tp) /* free a trace tree */
133			struct node *tp;
134			{
135			register struct node *kid;
136
137			for (kid = tp->daughter; kid != NULL; kid = kid->sister)
138			freetree(kid);
139			free((char *)tp);
140			}
141
142
143			tracerays(tp) /* trace a ray tree */
144			struct node *tp;
145			{
146			register struct node *kid;
147
148			for (kid = tp->daughter; kid != NULL; kid = kid->sister) {
149	greg	1.2	vector(tp->ipt, kid->ipt);
150	greg	1.1	tracerays(kid);
151			}
152			}
153
154
155			strtoipt(ipt, str) /* convert string x y z to image point */
156	greg	1.7	FVECT ipt;
157	greg	1.1	char *str;
158			{
159			FVECT pt;
160
161			if (sscanf(str, "%lf %lf %lf", &pt[0], &pt[1], &pt[2]) != 3)
162			return(-1);
163	greg	1.7	viewloc(ipt, &ourview, pt);
164	greg	1.1	return(0);
165			}
166
167
168			#define rwind RootWindow(theDisplay,ourScreen)
169			#define ourScreen DefaultScreen(theDisplay)
170
171			GC vecGC = 0;
172			Window gwind = 0;
173			int xoff, yoff;
174
175
176			setvec(ipt) /* set up vector drawing for pick */
177			double ipt[2];
178			{
179			XWindowAttributes wa;
180			XColor xc;
181			XGCValues gcv;
182	greg	1.4	int rx, ry, wx, wy;
183			Window rw, cw;
184			unsigned int pm;
185	greg	1.1	/* compute pointer location */
186	greg	1.5	if (gwind == 0 &&
187			(gwind = xfindwind(theDisplay, rwind, picture, 2)) == 0) {
188			fprintf(stderr, "%s: cannot find display window!\n", progname);
189			exit(1);
190	greg	1.1	}
191	greg	1.5	XQueryPointer(theDisplay, gwind, &rw, &cw, &rx, &ry, &wx, &wy, &pm);
192	greg	1.1	xoff = wx - ipt[0]*xres;
193			yoff = wy - (1.-ipt[1])*yres;
194			/* set graphics context */
195			if (vecGC == 0) {
196			XGetWindowAttributes(theDisplay, gwind, &wa);
197			xc.red = 65535; xc.green = 0; xc.blue = 0;
198			xc.flags = DoRed\|DoGreen\|DoBlue;
199			if (XAllocColor(theDisplay, wa.colormap, &xc)) {
200			gcv.foreground = xc.pixel;
201			vecGC = XCreateGC(theDisplay,gwind,GCForeground,&gcv);
202			} else {
203			gcv.function = GXinvert;
204			vecGC = XCreateGC(theDisplay,gwind,GCFunction,&gcv);
205			}
206			}
207			}
208
209
210			vector(ip1, ip2) /* draw a vector */
211			double ip1[2], ip2[2];
212			{
213			XDrawLine(theDisplay, gwind, vecGC,
214			(int)(ip1[0]xres)+xoff, (int)((1.-ip1[1])yres)+yoff,
215			(int)(ip2[0]xres)+xoff, (int)((1.-ip2[1])yres)+yoff);
216	greg	1.2	if (slow) {
217			XFlush(theDisplay);
218			sleep(1);
219			}
220	greg	1.1	}