src/px/xshowtrace.c

#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[] = "x11image -f";

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

char    *progname;                      /* program name */

FILE    *pin;                           /* input stream */

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

struct node {                           /* ray tree node */
        double  ipt[2];
        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];
        Cursor  curs;

        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",
                                argv[0]);
                exit(1);
        }
                                        /* get the viewing parameters */
        if (viewfile(argv[argc-1], &ourview, &xres, &yres) <= 0 ||
                        setview(&ourview) != NULL) {
                fprintf(stderr, "%s: cannot get view from \"%s\"\n",
                                argv[0], argv[argc-1]);
                exit(1);
        }
                                        /* open the display */
        if ((theDisplay = XOpenDisplay(NULL)) == NULL) {
                fprintf(stderr,
                "%s: cannot open display; DISPLAY variable set?\n",
                                argv[0]);
                exit(1);
        }
                                        /* build input command */
        sprintf(combuf, "%s %s | %s", xicom, argv[argc-1], 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 */
double  ipt[2];
char    *str;
{
        FVECT   pt;

        if (sscanf(str, "%lf %lf %lf", &pt[0], &pt[1], &pt[2]) != 3)
                return(-1);
        viewpixel(&ipt[0], &ipt[1], NULL, &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     pm, rx, ry, wx, wy, rw, cw;
                                        /* compute pointer location */
        if (gwind == 0) {
                XQueryPointer(theDisplay, rwind, &rw, &gwind,
                                &rx, &ry, &wx, &wy, &pm);
        }
        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:	1.3
Committed:	Mon Sep 24 12:21:06 1990 UTC (33 years, 7 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.2:	+1 -1 lines
Log Message:	added -f option to x11image command
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2			static char SCCSid[] = "$SunId$ LBL";
3			#endif
4
5			/*
6			* Display an image and watch the rays get traced.
7			*
8			* 9/21/90 Greg Ward
9			*/
10
11			#include "standard.h"
12			#include "view.h"
13			#include <X11/Xlib.h>
14
15			#define MAXDEPTH 32 /* ridiculous ray tree depth */
16
17			char rtcom[] = "rtrace -h -otp -fa -x 1";
18	greg	1.3	char xicom[] = "x11image -f";
19	greg	1.1
20			VIEW ourview = STDVIEW; /* view for picture */
21			int xres, yres;
22
23			char progname; / program name */
24
25			FILE pin; / input stream */
26
27			Display theDisplay = NULL; / connection to server */
28
29			struct node { /* ray tree node */
30			double ipt[2];
31			struct node *sister;
32			struct node *daughter;
33			};
34
35			#define newnode() (struct node *)calloc(1, sizeof(struct node))
36
37	greg	1.2	int slow = 0; /* slow trace? */
38	greg	1.1
39	greg	1.2
40	greg	1.1	main(argc, argv) /* takes both the octree and the image */
41			int argc;
42			char *argv[];
43			{
44			int i;
45			char combuf[256];
46			Cursor curs;
47
48			progname = argv[0];
49	greg	1.2	for (i = 1; i < argc-2; i++)
50			if (!strcmp(argv[i], "-s"))
51			slow++;
52			else
53			break;
54			if (i > argc-2) {
55			fprintf(stderr, "Usage: %s [-s] [rtrace args] octree picture\n",
56	greg	1.1	argv[0]);
57			exit(1);
58			}
59			/* get the viewing parameters */
60			if (viewfile(argv[argc-1], &ourview, &xres, &yres) <= 0 \|\|
61			setview(&ourview) != NULL) {
62			fprintf(stderr, "%s: cannot get view from \"%s\"\n",
63			argv[0], argv[argc-1]);
64			exit(1);
65			}
66			/* open the display */
67			if ((theDisplay = XOpenDisplay(NULL)) == NULL) {
68			fprintf(stderr,
69			"%s: cannot open display; DISPLAY variable set?\n",
70			argv[0]);
71			exit(1);
72			}
73			/* build input command */
74			sprintf(combuf, "%s %s \| %s", xicom, argv[argc-1], rtcom);
75	greg	1.2	for ( ; i < argc-1; i++) {
76	greg	1.1	strcat(combuf, " ");
77			strcat(combuf, argv[i]);
78			}
79			/* start the damn thing */
80			if ((pin = popen(combuf, "r")) == NULL)
81			exit(1);
82			/* loop on input */
83			mainloop();
84
85			exit(0);
86			}
87
88
89			mainloop() /* get and process input */
90			{
91			static struct node *sis[MAXDEPTH];
92			register struct node *newp;
93			char buf[128];
94			int level;
95			register int i;
96
97			level = 0;
98			while (fgets(buf, sizeof(buf), pin) != NULL) {
99			if ((newp = newnode()) == NULL) {
100			fprintf(stderr, "%s: memory error\n", progname);
101			return;
102			}
103			for (i = 0; buf[i] == '\t'; i++)
104			;
105			if (strtoipt(newp->ipt, buf+i) < 0) {
106			fprintf(stderr, "%s: bad read\n", progname);
107			return;
108			}
109			newp->sister = sis[i];
110			sis[i] = newp;
111			if (i < level) {
112			newp->daughter = sis[level];
113			sis[level] = NULL;
114			}
115			level = i;
116			if (i == 0) {
117			setvec(sis[0]->ipt);
118			tracerays(sis[0]);
119			freetree(sis[0]);
120			sis[0] = NULL;
121	greg	1.2	if (!slow)
122			XFlush(theDisplay);
123	greg	1.1	}
124			}
125			}
126
127
128			freetree(tp) /* free a trace tree */
129			struct node *tp;
130			{
131			register struct node *kid;
132
133			for (kid = tp->daughter; kid != NULL; kid = kid->sister)
134			freetree(kid);
135			free((char *)tp);
136			}
137
138
139			tracerays(tp) /* trace a ray tree */
140			struct node *tp;
141			{
142			register struct node *kid;
143
144			for (kid = tp->daughter; kid != NULL; kid = kid->sister) {
145	greg	1.2	vector(tp->ipt, kid->ipt);
146	greg	1.1	tracerays(kid);
147			}
148			}
149
150
151			strtoipt(ipt, str) /* convert string x y z to image point */
152			double ipt[2];
153			char *str;
154			{
155			FVECT pt;
156
157			if (sscanf(str, "%lf %lf %lf", &pt[0], &pt[1], &pt[2]) != 3)
158			return(-1);
159			viewpixel(&ipt[0], &ipt[1], NULL, &ourview, pt);
160			return(0);
161			}
162
163
164			#define rwind RootWindow(theDisplay,ourScreen)
165			#define ourScreen DefaultScreen(theDisplay)
166
167			GC vecGC = 0;
168			Window gwind = 0;
169			int xoff, yoff;
170
171
172			setvec(ipt) /* set up vector drawing for pick */
173			double ipt[2];
174			{
175			XWindowAttributes wa;
176			XColor xc;
177			XGCValues gcv;
178			int pm, rx, ry, wx, wy, rw, cw;
179			/* compute pointer location */
180			if (gwind == 0) {
181			XQueryPointer(theDisplay, rwind, &rw, &gwind,
182			&rx, &ry, &wx, &wy, &pm);
183			}
184			XQueryPointer(theDisplay, gwind, &rw, &cw,
185			&rx, &ry, &wx, &wy, &pm);
186			xoff = wx - ipt[0]*xres;
187			yoff = wy - (1.-ipt[1])*yres;
188			/* set graphics context */
189			if (vecGC == 0) {
190			XGetWindowAttributes(theDisplay, gwind, &wa);
191			xc.red = 65535; xc.green = 0; xc.blue = 0;
192			xc.flags = DoRed\|DoGreen\|DoBlue;
193			if (XAllocColor(theDisplay, wa.colormap, &xc)) {
194			gcv.foreground = xc.pixel;
195			vecGC = XCreateGC(theDisplay,gwind,GCForeground,&gcv);
196			} else {
197			gcv.function = GXinvert;
198			vecGC = XCreateGC(theDisplay,gwind,GCFunction,&gcv);
199			}
200			}
201			}
202
203
204			vector(ip1, ip2) /* draw a vector */
205			double ip1[2], ip2[2];
206			{
207			XDrawLine(theDisplay, gwind, vecGC,
208			(int)(ip1[0]xres)+xoff, (int)((1.-ip1[1])yres)+yoff,
209			(int)(ip2[0]xres)+xoff, (int)((1.-ip2[1])yres)+yoff);
210	greg	1.2	if (slow) {
211			XFlush(theDisplay);
212			sleep(1);
213			}
214	greg	1.1	}