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root/radiance/ray/src/hd/rhd_geom.c
Revision: 3.10
Committed: Tue May 13 17:58:33 2003 UTC (20 years, 11 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 3.9: +4 -4 lines
Log Message: 
Changed (char *) casts for memory copies to (void *) and other fixes

File Contents

# User Rev Content
1 gwlarson 3.1 #ifndef lint
2 greg 3.9 static const char RCSid[] = "$Id$";
3 gwlarson 3.1 #endif
4     /*
5 gwlarson 3.2 * Geometry drawing operations for OpenGL driver.
6 gwlarson 3.1 */
7    
8     #include "radogl.h"
9 gwlarson 3.2 #include "rhdriver.h"
10 gwlarson 3.1
11 gwlarson 3.2 #ifndef MAXGEO
12     #define MAXGEO 8 /* maximum geometry list length */
13 gwlarson 3.1 #endif
14 gwlarson 3.2 #ifndef MAXPORT
15     #define MAXPORT (MAXGEO*4) /* maximum number of portal files */
16     #endif
17 gwlarson 3.1
18 gwlarson 3.2 int gmPortals = 0; /* current portal GL list id */
19 gwlarson 3.8 static int Nlists = 0; /* number of lists allocated */
20 gwlarson 3.2 static char *curportlist[MAXPORT]; /* current portal list */
21     static char *newportlist[MAXPORT]; /* new portal file list */
22    
23     static struct gmEntry {
24     char *gfile; /* geometry file name */
25 gwlarson 3.1 FVECT cent; /* centroid */
26     FLOAT rad; /* radius */
27     int listid; /* display list identifier */
28 gwlarson 3.8 int nlists; /* number of lists allocated */
29 gwlarson 3.2 } gmCurrent[MAXGEO], gmNext[MAXGEO]; /* current and next list */
30 gwlarson 3.1
31 gwlarson 3.2 #define FORALLGEOM(ot,i) for (i=0;i<MAXGEO&&ot[i].gfile!=NULL;i++)
32 gwlarson 3.1
33 gwlarson 3.2 #define FORALLPORT(pl,i) for (i=0;i<MAXPORT&&pl[i]!=NULL;i++)
34 gwlarson 3.1
35 gwlarson 3.6 extern char *nextword();
36 gwlarson 3.2
37    
38     gmNewGeom(file) /* add new geometry to next list */
39     char *file;
40 gwlarson 3.1 {
41     register int i, j;
42     /* check if already in next list */
43 gwlarson 3.2 FORALLGEOM(gmNext, i)
44     if (!strcmp(file, gmNext[i].gfile))
45 gwlarson 3.1 return;
46 gwlarson 3.2 if (i >= MAXGEO) {
47 gwlarson 3.1 error(WARNING, "too many section octrees -- ignoring extra");
48     return;
49     }
50     /* check if copy in current list */
51 gwlarson 3.2 FORALLGEOM(gmCurrent, j)
52     if (!strcmp(file, gmCurrent[j].gfile)) {
53     copystruct(&gmNext[i], &gmCurrent[j]);
54 gwlarson 3.1 return;
55     }
56     /* else load new octree */
57 gwlarson 3.7 gmNext[i].gfile = savestr(file);
58 gwlarson 3.1 dolights = 0;
59 gwlarson 3.2 domats = 1;
60 gwlarson 3.8 gmNext[i].listid = rgl_octlist(file, gmNext[i].cent, &gmNext[i].rad,
61     &gmNext[i].nlists);
62 gwlarson 3.5 gmNext[i].rad *= 1.732; /* go to corners */
63 gwlarson 3.1 #ifdef DEBUG
64     fprintf(stderr, "Loaded octree \"%s\" into listID %d with radius %f\n",
65 gwlarson 3.2 file, gmNext[i].listid, gmNext[i].rad);
66 gwlarson 3.1 #endif
67     }
68    
69    
70 gwlarson 3.2 gmEndGeom() /* make next list current */
71 gwlarson 3.1 {
72     register int i, j;
73    
74 gwlarson 3.2 FORALLGEOM(gmCurrent, i) {
75     FORALLGEOM(gmNext, j)
76     if (gmNext[j].listid == gmCurrent[i].listid)
77 gwlarson 3.1 break;
78 gwlarson 3.7 if (j >= MAXGEO || gmNext[j].gfile == NULL) {
79 gwlarson 3.8 glDeleteLists(gmCurrent[i].listid, /* not found */
80     gmCurrent[i].nlists);
81 gwlarson 3.7 freestr(gmCurrent[i].gfile);
82     }
83 gwlarson 3.1 }
84 greg 3.10 bcopy((void *)gmNext, (void *)gmCurrent, sizeof(gmNext));
85     bzero((void *)gmNext, sizeof(gmNext));
86 gwlarson 3.1 }
87    
88    
89     int
90 gwlarson 3.6 gmDrawGeom() /* draw current list of octrees */
91 gwlarson 3.1 {
92 gwlarson 3.2 register int n;
93 gwlarson 3.1
94 gwlarson 3.2 FORALLGEOM(gmCurrent, n)
95     glCallList(gmCurrent[n].listid);
96 gwlarson 3.3 return(n);
97     }
98    
99    
100     gmDrawPortals(r, g, b, a) /* draw portals with specific RGBA value */
101     int r, g, b, a;
102     {
103     if (!gmPortals || r<0 & g<0 & b<0 & a<0)
104     return;
105     glPushAttrib(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT|
106     GL_POLYGON_BIT|GL_LIGHTING_BIT);
107     glDisable(GL_LIGHTING);
108     glDisable(GL_DITHER);
109 gwlarson 3.4 glShadeModel(GL_FLAT);
110 gwlarson 3.3 glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
111     /* don't actually write depth */
112 gwlarson 3.2 glDepthMask(GL_FALSE);
113 gwlarson 3.3 /* draw only selected channels */
114     glColorMask(r>=0, g>=0, b>=0, a>=0);
115     glColor4ub(r&0xff, g&0xff, b&0xff, a&0xff);
116 gwlarson 3.2 glCallList(gmPortals); /* draw them portals */
117     glPopAttrib();
118 gwlarson 3.1 }
119    
120    
121 gwlarson 3.2 gmDepthLimit(dl, vorg, vdir) /* compute approximate depth limits for view */
122 gwlarson 3.1 double dl[2];
123     FVECT vorg, vdir;
124     {
125     FVECT v;
126     double dcent;
127     register int i;
128    
129     dl[0] = FHUGE; dl[1] = 0.;
130 gwlarson 3.2 FORALLGEOM(gmCurrent, i) {
131     VSUB(v, gmCurrent[i].cent, vorg);
132 gwlarson 3.1 dcent = DOT(v, vdir);
133 gwlarson 3.2 if (dl[0] > dcent-gmCurrent[i].rad)
134     dl[0] = dcent-gmCurrent[i].rad;
135     if (dl[1] < dcent+gmCurrent[i].rad)
136     dl[1] = dcent+gmCurrent[i].rad;
137 gwlarson 3.1 }
138     if (dl[0] < 0.)
139     dl[0] = 0.;
140 gwlarson 3.2 }
141    
142    
143     gmNewPortal(pflist) /* add portal file(s) to our new list */
144     char *pflist;
145     {
146     register int i, j;
147     char newfile[128];
148    
149     if (pflist == NULL)
150     return;
151 gwlarson 3.6 while ((pflist = nextword(newfile, sizeof(newfile), pflist)) != NULL) {
152 gwlarson 3.2 FORALLPORT(newportlist,i)
153     if (!strcmp(newportlist[i], newfile))
154     goto endloop; /* in list already */
155     if (i >= MAXPORT) {
156     error(WARNING, "too many portals -- ignoring extra");
157     return;
158     }
159     newportlist[i] = savestr(newfile);
160     endloop:;
161     }
162     }
163    
164    
165     static int
166     sstrcmp(ss0, ss1)
167     char **ss0, **ss1;
168     {
169     return(strcmp(*ss0, *ss1));
170     }
171    
172    
173     int
174     gmEndPortal() /* close portal list and return GL list */
175     {
176     register int n;
177    
178     FORALLPORT(newportlist, n);
179     if (!n) { /* free old GL list */
180     if (gmPortals)
181 gwlarson 3.8 glDeleteLists(gmPortals, Nlists);
182 gwlarson 3.2 gmPortals = 0;
183     } else
184     qsort(newportlist, n, sizeof(char *), sstrcmp);
185     FORALLPORT(newportlist, n) /* compare sorted lists */
186     if (curportlist[n] == NULL ||
187     strcmp(curportlist[n],newportlist[n])) {
188     /* load new list */
189     if (gmPortals)
190     glDeleteLists(gmPortals, 1);
191     FORALLPORT(newportlist, n);
192     dolights = 0;
193     domats = 0;
194 gwlarson 3.8 gmPortals = rgl_filelist(n, newportlist, &Nlists);
195 gwlarson 3.2 break;
196     }
197     FORALLPORT(curportlist, n) /* free old file list */
198     freestr(curportlist[n]);
199 greg 3.10 bcopy((void *)newportlist, (void *)curportlist, sizeof(newportlist));
200     bzero((void *)newportlist, sizeof(newportlist));
201 gwlarson 3.2 return(gmPortals); /* return GL list id */
202 gwlarson 3.1 }