1 |
gwlarson |
3.1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
2 |
|
|
|
3 |
|
|
#ifndef lint |
4 |
|
|
static char SCCSid[] = "$SunId$ SGI"; |
5 |
|
|
#endif |
6 |
|
|
|
7 |
|
|
/* |
8 |
gwlarson |
3.2 |
* Geometry drawing operations for OpenGL driver. |
9 |
gwlarson |
3.1 |
*/ |
10 |
|
|
|
11 |
|
|
#include "radogl.h" |
12 |
gwlarson |
3.2 |
#include "rhdriver.h" |
13 |
gwlarson |
3.1 |
|
14 |
gwlarson |
3.2 |
#ifndef MAXGEO |
15 |
|
|
#define MAXGEO 8 /* maximum geometry list length */ |
16 |
gwlarson |
3.1 |
#endif |
17 |
gwlarson |
3.2 |
#ifndef MAXPORT |
18 |
|
|
#define MAXPORT (MAXGEO*4) /* maximum number of portal files */ |
19 |
|
|
#endif |
20 |
gwlarson |
3.1 |
|
21 |
gwlarson |
3.2 |
int gmPortals = 0; /* current portal GL list id */ |
22 |
|
|
static char *curportlist[MAXPORT]; /* current portal list */ |
23 |
|
|
static char *newportlist[MAXPORT]; /* new portal file list */ |
24 |
|
|
|
25 |
|
|
static struct gmEntry { |
26 |
|
|
char *gfile; /* geometry file name */ |
27 |
gwlarson |
3.1 |
FVECT cent; /* centroid */ |
28 |
|
|
FLOAT rad; /* radius */ |
29 |
|
|
int listid; /* display list identifier */ |
30 |
gwlarson |
3.2 |
} gmCurrent[MAXGEO], gmNext[MAXGEO]; /* current and next list */ |
31 |
gwlarson |
3.1 |
|
32 |
gwlarson |
3.2 |
#define FORALLGEOM(ot,i) for (i=0;i<MAXGEO&&ot[i].gfile!=NULL;i++) |
33 |
gwlarson |
3.1 |
|
34 |
gwlarson |
3.2 |
#define FORALLPORT(pl,i) for (i=0;i<MAXPORT&&pl[i]!=NULL;i++) |
35 |
gwlarson |
3.1 |
|
36 |
gwlarson |
3.2 |
extern char *atos(), *sskip(), *sskip2(); |
37 |
|
|
|
38 |
|
|
|
39 |
|
|
gmNewGeom(file) /* add new geometry to next list */ |
40 |
|
|
char *file; |
41 |
gwlarson |
3.1 |
{ |
42 |
|
|
register int i, j; |
43 |
|
|
/* check if already in next list */ |
44 |
gwlarson |
3.2 |
FORALLGEOM(gmNext, i) |
45 |
|
|
if (!strcmp(file, gmNext[i].gfile)) |
46 |
gwlarson |
3.1 |
return; |
47 |
gwlarson |
3.2 |
if (i >= MAXGEO) { |
48 |
gwlarson |
3.1 |
error(WARNING, "too many section octrees -- ignoring extra"); |
49 |
|
|
return; |
50 |
|
|
} |
51 |
|
|
/* check if copy in current list */ |
52 |
gwlarson |
3.2 |
FORALLGEOM(gmCurrent, j) |
53 |
|
|
if (!strcmp(file, gmCurrent[j].gfile)) { |
54 |
|
|
copystruct(&gmNext[i], &gmCurrent[j]); |
55 |
gwlarson |
3.1 |
return; |
56 |
|
|
} |
57 |
|
|
/* else load new octree */ |
58 |
gwlarson |
3.2 |
gmNext[i].gfile = file; |
59 |
gwlarson |
3.1 |
dolights = 0; |
60 |
gwlarson |
3.2 |
domats = 1; |
61 |
|
|
gmNext[i].listid = rgl_octlist(file, gmNext[i].cent, &gmNext[i].rad); |
62 |
gwlarson |
3.1 |
#ifdef DEBUG |
63 |
|
|
fprintf(stderr, "Loaded octree \"%s\" into listID %d with radius %f\n", |
64 |
gwlarson |
3.2 |
file, gmNext[i].listid, gmNext[i].rad); |
65 |
gwlarson |
3.1 |
#endif |
66 |
|
|
} |
67 |
|
|
|
68 |
|
|
|
69 |
gwlarson |
3.2 |
gmEndGeom() /* make next list current */ |
70 |
gwlarson |
3.1 |
{ |
71 |
|
|
register int i, j; |
72 |
|
|
|
73 |
gwlarson |
3.2 |
FORALLGEOM(gmCurrent, i) { |
74 |
|
|
FORALLGEOM(gmNext, j) |
75 |
|
|
if (gmNext[j].listid == gmCurrent[i].listid) |
76 |
gwlarson |
3.1 |
break; |
77 |
gwlarson |
3.2 |
if (j >= MAXGEO || gmNext[j].gfile == NULL) |
78 |
|
|
glDeleteLists(gmCurrent[i].listid, 1); /* not found */ |
79 |
gwlarson |
3.1 |
} |
80 |
gwlarson |
3.2 |
bcopy((char *)gmNext, (char *)gmCurrent, sizeof(gmNext)); |
81 |
|
|
bzero((char *)gmNext, sizeof(gmNext)); |
82 |
gwlarson |
3.1 |
} |
83 |
|
|
|
84 |
|
|
|
85 |
|
|
int |
86 |
gwlarson |
3.2 |
gmDrawGeom(clearports) /* draw current list of octrees (and ports) */ |
87 |
|
|
int clearports; |
88 |
gwlarson |
3.1 |
{ |
89 |
gwlarson |
3.2 |
register int n; |
90 |
gwlarson |
3.1 |
|
91 |
gwlarson |
3.2 |
FORALLGEOM(gmCurrent, n) |
92 |
|
|
glCallList(gmCurrent[n].listid); |
93 |
|
|
if (!n | !clearports | !gmPortals) |
94 |
|
|
return(n); |
95 |
|
|
/* mark alpha channel over the portals */ |
96 |
|
|
glPushAttrib(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT); |
97 |
|
|
glDepthMask(GL_FALSE); |
98 |
|
|
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_TRUE); |
99 |
|
|
glClear(GL_COLOR_BUFFER_BIT); |
100 |
|
|
glColor4ub(0, 0, 0, 0xff); /* write alpha buffer as mask */ |
101 |
|
|
glCallList(gmPortals); /* draw them portals */ |
102 |
|
|
glPopAttrib(); |
103 |
|
|
return(n); |
104 |
gwlarson |
3.1 |
} |
105 |
|
|
|
106 |
|
|
|
107 |
gwlarson |
3.2 |
gmDepthLimit(dl, vorg, vdir) /* compute approximate depth limits for view */ |
108 |
gwlarson |
3.1 |
double dl[2]; |
109 |
|
|
FVECT vorg, vdir; |
110 |
|
|
{ |
111 |
|
|
FVECT v; |
112 |
|
|
double dcent; |
113 |
|
|
register int i; |
114 |
|
|
|
115 |
|
|
dl[0] = FHUGE; dl[1] = 0.; |
116 |
gwlarson |
3.2 |
FORALLGEOM(gmCurrent, i) { |
117 |
|
|
VSUB(v, gmCurrent[i].cent, vorg); |
118 |
gwlarson |
3.1 |
dcent = DOT(v, vdir); |
119 |
gwlarson |
3.2 |
if (dl[0] > dcent-gmCurrent[i].rad) |
120 |
|
|
dl[0] = dcent-gmCurrent[i].rad; |
121 |
|
|
if (dl[1] < dcent+gmCurrent[i].rad) |
122 |
|
|
dl[1] = dcent+gmCurrent[i].rad; |
123 |
gwlarson |
3.1 |
} |
124 |
|
|
if (dl[0] < 0.) |
125 |
|
|
dl[0] = 0.; |
126 |
gwlarson |
3.2 |
} |
127 |
|
|
|
128 |
|
|
|
129 |
|
|
gmNewPortal(pflist) /* add portal file(s) to our new list */ |
130 |
|
|
char *pflist; |
131 |
|
|
{ |
132 |
|
|
register int i, j; |
133 |
|
|
char newfile[128]; |
134 |
|
|
|
135 |
|
|
if (pflist == NULL) |
136 |
|
|
return; |
137 |
|
|
while (*pflist) { |
138 |
|
|
atos(newfile, sizeof(newfile), pflist); |
139 |
|
|
if (!*newfile) |
140 |
|
|
break; |
141 |
|
|
pflist = sskip(pflist); |
142 |
|
|
FORALLPORT(newportlist,i) |
143 |
|
|
if (!strcmp(newportlist[i], newfile)) |
144 |
|
|
goto endloop; /* in list already */ |
145 |
|
|
if (i >= MAXPORT) { |
146 |
|
|
error(WARNING, "too many portals -- ignoring extra"); |
147 |
|
|
return; |
148 |
|
|
} |
149 |
|
|
newportlist[i] = savestr(newfile); |
150 |
|
|
endloop:; |
151 |
|
|
} |
152 |
|
|
} |
153 |
|
|
|
154 |
|
|
|
155 |
|
|
static int |
156 |
|
|
sstrcmp(ss0, ss1) |
157 |
|
|
char **ss0, **ss1; |
158 |
|
|
{ |
159 |
|
|
return(strcmp(*ss0, *ss1)); |
160 |
|
|
} |
161 |
|
|
|
162 |
|
|
|
163 |
|
|
int |
164 |
|
|
gmEndPortal() /* close portal list and return GL list */ |
165 |
|
|
{ |
166 |
|
|
register int n; |
167 |
|
|
|
168 |
|
|
FORALLPORT(newportlist, n); |
169 |
|
|
if (!n) { /* free old GL list */ |
170 |
|
|
if (gmPortals) |
171 |
|
|
glDeleteLists(gmPortals, 1); |
172 |
|
|
gmPortals = 0; |
173 |
|
|
} else |
174 |
|
|
qsort(newportlist, n, sizeof(char *), sstrcmp); |
175 |
|
|
FORALLPORT(newportlist, n) /* compare sorted lists */ |
176 |
|
|
if (curportlist[n] == NULL || |
177 |
|
|
strcmp(curportlist[n],newportlist[n])) { |
178 |
|
|
/* load new list */ |
179 |
|
|
if (gmPortals) |
180 |
|
|
glDeleteLists(gmPortals, 1); |
181 |
|
|
FORALLPORT(newportlist, n); |
182 |
|
|
dolights = 0; |
183 |
|
|
domats = 0; |
184 |
|
|
gmPortals = rgl_filelist(n, newportlist); |
185 |
|
|
break; |
186 |
|
|
} |
187 |
|
|
FORALLPORT(curportlist, n) /* free old file list */ |
188 |
|
|
freestr(curportlist[n]); |
189 |
|
|
bcopy((char *)newportlist, (char *)curportlist, sizeof(newportlist)); |
190 |
|
|
bzero((char *)newportlist, sizeof(newportlist)); |
191 |
|
|
return(gmPortals); /* return GL list id */ |
192 |
gwlarson |
3.1 |
} |