src/px/xshowtrace.c

#ifndef lint
static const char       RCSid[] = "$Id: xshowtrace.c,v 2.13 2014/04/11 20:27:23 greg Exp $";
#endif
/*
 *  Display an image and watch the rays get traced.
 *
 *      9/21/90 Greg Ward
 */

#include <X11/Xlib.h>

#include "standard.h"
#include "paths.h"
#include "view.h"

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

#define  sscanvec(s,v)  (sscanf(s,FVFORMAT,v,v+1,v+2)==3)

char    rtcom[64] = "rtrace -h- -otp -fa -x 1";
char    xicom[] = "ximage -c 256";

VIEW    ourview = STDVIEW;              /* view for picture */
RESOLU  ourres;                         /* picture resolution */

char    *picture;                       /* picture name */

FILE    *pin;                           /* input stream */

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

struct node {                           /* ray tree node */
        int     ipt[2];
        struct node     *sister;
        struct node     *daughter;
};

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

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

void mainloop(void);
static void freetree(struct node        *tp);
static void tracerays(struct node       *tp);
static int strtoipt(int ipt[2], char    *str);
static void setvec(int  ipt[2]);
static void vector(int  ip1[2], int     ip2[2]);


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

        fixargv0(argv[0]);              /* sets global progname */
        for (i = 1; i < argc-2; i++)
                if (!strcmp(argv[i], "-s"))
                        slow++;
                else if (!strcmp(argv[i], "-T"))
                        strcat(rtcom, " -oTp");
                else
                        break;
        if (i > argc-2) {
                fprintf(stderr, "Usage: %s [-s][-T] [rtrace args] octree picture\n",
                                progname);
                exit(1);
        }
        picture = argv[argc-1];
                                        /* get the viewing parameters */
        if (viewfile(picture, &ourview, &ourres) <= 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();
                                        /* close pipe and exit */
        pclose(pin);
        exit(0);
}


void
mainloop(void)                          /* 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);
                }
        }
}


static void
freetree(                               /* free a trace tree */
        struct node     *tp
)
{
        register struct node    *kid, *k2;

        for (kid = tp->daughter; kid != NULL; kid = k2) {
                k2 = kid->sister;
                freetree(kid);
        }
        free((void *)tp);
}


static void
tracerays(                              /* 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);
        }
}


static int
strtoipt(               /* convert string x y z to image point */
        int     ipt[2],
        char    *str
)
{
        FVECT   im_pt, pt;

        if (!sscanvec(str, pt))
                return(-1);
        if (DOT(pt,pt) <= FTINY)                /* origin is really infinity */
                ipt[0] = ipt[1] = -1;                   /* null vector */
        else {
                viewloc(im_pt, &ourview, pt);
                loc2pix(ipt, &ourres, im_pt[0], im_pt[1]);
        }
        return(0);
}


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

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


static void
setvec(                 /* set up vector drawing for pick */
        int     ipt[2]
)
{
        extern Window   xfindwind();
        XWindowAttributes       wa;
        XColor  xc;
        XGCValues       gcv;
        int     rx, ry, wx, wy;
        Window  rw, cw;
        unsigned int    pm;
                                        /* compute pointer location */
        if (gwind == 0) {
                register char   *wn;
                for (wn = picture; *wn; wn++);
                while (wn > picture && wn[-1] != '/') wn--;
                if ((gwind = xfindwind(theDisplay, rwind, wn, 4)) == 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];
        yoff = wy - ipt[1];
                                        /* 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);
                }
        }
}


static void
vector(         /* draw a vector */
        int     ip1[2],
        int     ip2[2]
)
{
        if (ip2[0] == -1 && ip2[1] == -1)
                return;                 /* null vector */
        XDrawLine(theDisplay, gwind, vecGC,
                        ip1[0]+xoff, ip1[1]+yoff,
                        ip2[0]+xoff, ip2[1]+yoff);
        if (slow) {
                XFlush(theDisplay);
                sleep(1);
        }
}
Revision:	2.14
Committed:	Tue Jun 3 21:31:51 2025 UTC (44 hours, 19 minutes ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 2.13:	+2 -4 lines
Log Message:	refactor: More consistent use of global char * progname and fixargv0()
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.14	static const char RCSid[] = "$Id: xshowtrace.c,v 2.13 2014/04/11 20:27:23 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* Display an image and watch the rays get traced.
6			*
7			* 9/21/90 Greg Ward
8			*/
9
10	schorsch	2.9	#include <X11/Xlib.h>
11
12	greg	1.1	#include "standard.h"
13	schorsch	2.9	#include "paths.h"
14	greg	1.1	#include "view.h"
15
16			#define MAXDEPTH 32 /* ridiculous ray tree depth */
17
18	greg	2.13	#define sscanvec(s,v) (sscanf(s,FVFORMAT,v,v+1,v+2)==3)
19	greg	2.2
20	greg	2.11	char rtcom[64] = "rtrace -h- -otp -fa -x 1";
21	greg	2.5	char xicom[] = "ximage -c 256";
22	greg	1.1
23			VIEW ourview = STDVIEW; /* view for picture */
24	greg	2.2	RESOLU ourres; /* picture resolution */
25	greg	1.1
26	greg	1.5	char picture; / picture name */
27
28	greg	1.1	FILE pin; / input stream */
29
30			Display theDisplay = NULL; / connection to server */
31
32			struct node { /* ray tree node */
33	greg	2.2	int ipt[2];
34	greg	1.1	struct node *sister;
35			struct node *daughter;
36			};
37
38			#define newnode() (struct node *)calloc(1, sizeof(struct node))
39
40	greg	1.2	int slow = 0; /* slow trace? */
41	greg	1.1
42	schorsch	2.10	void mainloop(void);
43			static void freetree(struct node *tp);
44			static void tracerays(struct node *tp);
45			static int strtoipt(int ipt[2], char *str);
46			static void setvec(int ipt[2]);
47			static void vector(int ip1[2], int ip2[2]);
48	greg	1.2
49	schorsch	2.10
50			int
51			main( /* takes both the octree and the image */
52			int argc,
53			char *argv[]
54			)
55	greg	1.1	{
56			int i;
57	schorsch	2.9	char combuf[PATH_MAX];
58	greg	1.1
59	greg	2.14	fixargv0(argv[0]); /* sets global progname */
60	greg	1.2	for (i = 1; i < argc-2; i++)
61			if (!strcmp(argv[i], "-s"))
62			slow++;
63	greg	2.11	else if (!strcmp(argv[i], "-T"))
64			strcat(rtcom, " -oTp");
65	greg	1.2	else
66			break;
67			if (i > argc-2) {
68	greg	2.12	fprintf(stderr, "Usage: %s [-s][-T] [rtrace args] octree picture\n",
69	greg	1.5	progname);
70	greg	1.1	exit(1);
71			}
72	greg	1.5	picture = argv[argc-1];
73	greg	1.1	/* get the viewing parameters */
74	greg	2.2	if (viewfile(picture, &ourview, &ourres) <= 0 \|\|
75	greg	1.1	setview(&ourview) != NULL) {
76			fprintf(stderr, "%s: cannot get view from \"%s\"\n",
77	greg	1.5	progname, picture);
78	greg	1.1	exit(1);
79			}
80			/* open the display */
81			if ((theDisplay = XOpenDisplay(NULL)) == NULL) {
82			fprintf(stderr,
83			"%s: cannot open display; DISPLAY variable set?\n",
84	greg	1.5	progname);
85	greg	1.1	exit(1);
86			}
87			/* build input command */
88	schorsch	2.9	sprintf(combuf, "%s \"%s\" \| %s", xicom, picture, rtcom);
89	greg	1.2	for ( ; i < argc-1; i++) {
90	greg	1.1	strcat(combuf, " ");
91			strcat(combuf, argv[i]);
92			}
93			/* start the damn thing */
94			if ((pin = popen(combuf, "r")) == NULL)
95			exit(1);
96			/* loop on input */
97			mainloop();
98	greg	2.3	/* close pipe and exit */
99			pclose(pin);
100	greg	1.1	exit(0);
101			}
102
103
104	schorsch	2.10	void
105			mainloop(void) /* get and process input */
106	greg	1.1	{
107			static struct node *sis[MAXDEPTH];
108			register struct node *newp;
109			char buf[128];
110			int level;
111			register int i;
112
113			level = 0;
114			while (fgets(buf, sizeof(buf), pin) != NULL) {
115			if ((newp = newnode()) == NULL) {
116			fprintf(stderr, "%s: memory error\n", progname);
117			return;
118			}
119			for (i = 0; buf[i] == '\t'; i++)
120			;
121			if (strtoipt(newp->ipt, buf+i) < 0) {
122			fprintf(stderr, "%s: bad read\n", progname);
123			return;
124			}
125			newp->sister = sis[i];
126			sis[i] = newp;
127			if (i < level) {
128			newp->daughter = sis[level];
129			sis[level] = NULL;
130			}
131			level = i;
132			if (i == 0) {
133			setvec(sis[0]->ipt);
134			tracerays(sis[0]);
135			freetree(sis[0]);
136			sis[0] = NULL;
137	greg	1.2	if (!slow)
138			XFlush(theDisplay);
139	greg	1.1	}
140			}
141			}
142
143
144	schorsch	2.10	static void
145			freetree( /* free a trace tree */
146			struct node *tp
147			)
148	greg	1.1	{
149	greg	2.8	register struct node kid, k2;
150	greg	1.1
151	greg	2.8	for (kid = tp->daughter; kid != NULL; kid = k2) {
152			k2 = kid->sister;
153	greg	1.1	freetree(kid);
154	greg	2.8	}
155	greg	2.7	free((void *)tp);
156	greg	1.1	}
157
158
159	schorsch	2.10	static void
160			tracerays( /* trace a ray tree */
161			struct node *tp
162			)
163	greg	1.1	{
164			register struct node *kid;
165
166			for (kid = tp->daughter; kid != NULL; kid = kid->sister) {
167	greg	1.2	vector(tp->ipt, kid->ipt);
168	greg	1.1	tracerays(kid);
169			}
170			}
171
172
173	schorsch	2.10	static int
174			strtoipt( /* convert string x y z to image point */
175			int ipt[2],
176			char *str
177			)
178	greg	1.1	{
179	greg	2.2	FVECT im_pt, pt;
180	greg	1.1
181	greg	2.2	if (!sscanvec(str, pt))
182	greg	1.1	return(-1);
183	greg	2.2	if (DOT(pt,pt) <= FTINY) /* origin is really infinity */
184			ipt[0] = ipt[1] = -1; /* null vector */
185			else {
186			viewloc(im_pt, &ourview, pt);
187			loc2pix(ipt, &ourres, im_pt[0], im_pt[1]);
188			}
189	greg	1.1	return(0);
190			}
191
192
193			#define rwind RootWindow(theDisplay,ourScreen)
194			#define ourScreen DefaultScreen(theDisplay)
195
196			GC vecGC = 0;
197			Window gwind = 0;
198			int xoff, yoff;
199
200
201	schorsch	2.10	static void
202			setvec( /* set up vector drawing for pick */
203			int ipt[2]
204			)
205	greg	1.1	{
206	greg	2.4	extern Window xfindwind();
207	greg	1.1	XWindowAttributes wa;
208			XColor xc;
209			XGCValues gcv;
210	greg	1.4	int rx, ry, wx, wy;
211			Window rw, cw;
212			unsigned int pm;
213	greg	1.1	/* compute pointer location */
214	greg	2.6	if (gwind == 0) {
215			register char *wn;
216			for (wn = picture; *wn; wn++);
217			while (wn > picture && wn[-1] != '/') wn--;
218			if ((gwind = xfindwind(theDisplay, rwind, wn, 4)) == 0) {
219			fprintf(stderr, "%s: cannot find display window!\n",
220			progname);
221			exit(1);
222			}
223	greg	1.1	}
224	greg	1.5	XQueryPointer(theDisplay, gwind, &rw, &cw, &rx, &ry, &wx, &wy, &pm);
225	greg	2.2	xoff = wx - ipt[0];
226			yoff = wy - ipt[1];
227	greg	1.1	/* set graphics context */
228			if (vecGC == 0) {
229			XGetWindowAttributes(theDisplay, gwind, &wa);
230			xc.red = 65535; xc.green = 0; xc.blue = 0;
231			xc.flags = DoRed\|DoGreen\|DoBlue;
232			if (XAllocColor(theDisplay, wa.colormap, &xc)) {
233			gcv.foreground = xc.pixel;
234			vecGC = XCreateGC(theDisplay,gwind,GCForeground,&gcv);
235			} else {
236			gcv.function = GXinvert;
237			vecGC = XCreateGC(theDisplay,gwind,GCFunction,&gcv);
238			}
239			}
240			}
241
242
243	schorsch	2.10	static void
244			vector( /* draw a vector */
245			int ip1[2],
246			int ip2[2]
247			)
248	greg	1.1	{
249	greg	2.2	if (ip2[0] == -1 && ip2[1] == -1)
250			return; /* null vector */
251	greg	1.1	XDrawLine(theDisplay, gwind, vecGC,
252	greg	2.2	ip1[0]+xoff, ip1[1]+yoff,
253			ip2[0]+xoff, ip2[1]+yoff);
254	greg	1.2	if (slow) {
255			XFlush(theDisplay);
256			sleep(1);
257			}
258	greg	1.1	}