| 1 |
gwlarson |
3.1 |
#ifndef lint |
| 2 |
greg |
3.4 |
static const char RCSid[] = "$Id$"; |
| 3 |
gwlarson |
3.1 |
#endif |
| 4 |
|
|
/* |
| 5 |
|
|
* Convert Radiance -> OpenGL surfaces. |
| 6 |
|
|
*/ |
| 7 |
|
|
|
| 8 |
greg |
3.4 |
/* ==================================================================== |
| 9 |
|
|
* The Radiance Software License, Version 1.0 |
| 10 |
|
|
* |
| 11 |
|
|
* Copyright (c) 1990 - 2002 The Regents of the University of California, |
| 12 |
|
|
* through Lawrence Berkeley National Laboratory. All rights reserved. |
| 13 |
|
|
* |
| 14 |
|
|
* Redistribution and use in source and binary forms, with or without |
| 15 |
|
|
* modification, are permitted provided that the following conditions |
| 16 |
|
|
* are met: |
| 17 |
|
|
* |
| 18 |
|
|
* 1. Redistributions of source code must retain the above copyright |
| 19 |
|
|
* notice, this list of conditions and the following disclaimer. |
| 20 |
|
|
* |
| 21 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
| 22 |
|
|
* notice, this list of conditions and the following disclaimer in |
| 23 |
|
|
* the documentation and/or other materials provided with the |
| 24 |
|
|
* distribution. |
| 25 |
|
|
* |
| 26 |
|
|
* 3. The end-user documentation included with the redistribution, |
| 27 |
|
|
* if any, must include the following acknowledgment: |
| 28 |
|
|
* "This product includes Radiance software |
| 29 |
|
|
* (http://radsite.lbl.gov/) |
| 30 |
|
|
* developed by the Lawrence Berkeley National Laboratory |
| 31 |
|
|
* (http://www.lbl.gov/)." |
| 32 |
|
|
* Alternately, this acknowledgment may appear in the software itself, |
| 33 |
|
|
* if and wherever such third-party acknowledgments normally appear. |
| 34 |
|
|
* |
| 35 |
|
|
* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
| 36 |
|
|
* and "The Regents of the University of California" must |
| 37 |
|
|
* not be used to endorse or promote products derived from this |
| 38 |
|
|
* software without prior written permission. For written |
| 39 |
|
|
* permission, please contact [email protected]. |
| 40 |
|
|
* |
| 41 |
|
|
* 5. Products derived from this software may not be called "Radiance", |
| 42 |
|
|
* nor may "Radiance" appear in their name, without prior written |
| 43 |
|
|
* permission of Lawrence Berkeley National Laboratory. |
| 44 |
|
|
* |
| 45 |
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| 46 |
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 47 |
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 48 |
|
|
* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
| 49 |
|
|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 50 |
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 51 |
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 52 |
|
|
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 53 |
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 54 |
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 55 |
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 56 |
|
|
* SUCH DAMAGE. |
| 57 |
|
|
* ==================================================================== |
| 58 |
|
|
* |
| 59 |
|
|
* This software consists of voluntary contributions made by many |
| 60 |
|
|
* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
| 61 |
|
|
* information on Lawrence Berkeley National Laboratory, please see |
| 62 |
|
|
* <http://www.lbl.gov/>. |
| 63 |
|
|
*/ |
| 64 |
|
|
|
| 65 |
gwlarson |
3.1 |
#include "radogl.h" |
| 66 |
|
|
|
| 67 |
|
|
#ifndef NSLICES |
| 68 |
|
|
#define NSLICES 18 /* number of quadric slices */ |
| 69 |
|
|
#endif |
| 70 |
|
|
#ifndef NSTACKS |
| 71 |
|
|
#define NSTACKS 10 /* number of quadric stacks */ |
| 72 |
|
|
#endif |
| 73 |
|
|
|
| 74 |
|
|
MATREC *curmat = NULL; /* current material */ |
| 75 |
|
|
|
| 76 |
|
|
static int curpolysize = 0; /* outputting triangles/quads */ |
| 77 |
|
|
|
| 78 |
|
|
static GLUquadricObj *gluqo; /* shared quadric object */ |
| 79 |
|
|
static GLUtesselator *gluto; /* shared tessallation object */ |
| 80 |
|
|
|
| 81 |
|
|
static char *glu_rout = "unk"; /* active GLU routine */ |
| 82 |
|
|
|
| 83 |
|
|
#define NOPOLY() if (curpolysize) {glEnd(); curpolysize = 0;} else |
| 84 |
|
|
|
| 85 |
|
|
|
| 86 |
greg |
3.4 |
void |
| 87 |
gwlarson |
3.1 |
setmaterial(mp, cent, ispoly) /* prepare for new material */ |
| 88 |
|
|
register MATREC *mp; |
| 89 |
|
|
FVECT cent; |
| 90 |
|
|
int ispoly; |
| 91 |
|
|
{ |
| 92 |
|
|
if (mp != curmat && domats) { |
| 93 |
|
|
NOPOLY(); |
| 94 |
|
|
domatobj(curmat = mp, cent); |
| 95 |
|
|
} else if (!ispoly) |
| 96 |
|
|
NOPOLY(); |
| 97 |
|
|
} |
| 98 |
|
|
|
| 99 |
|
|
|
| 100 |
|
|
double |
| 101 |
|
|
polyarea(cent, norm, n, v) /* compute polygon area & normal */ |
| 102 |
|
|
FVECT cent, norm; /* returned center and normal */ |
| 103 |
|
|
int n; /* number of vertices */ |
| 104 |
|
|
register FVECT v[]; /* vertex list */ |
| 105 |
|
|
{ |
| 106 |
|
|
FVECT v1, v2, v3; |
| 107 |
|
|
double d; |
| 108 |
|
|
register int i; |
| 109 |
|
|
|
| 110 |
|
|
norm[0] = norm[1] = norm[2] = 0.; |
| 111 |
|
|
v1[0] = v[1][0] - v[0][0]; |
| 112 |
|
|
v1[1] = v[1][1] - v[0][1]; |
| 113 |
|
|
v1[2] = v[1][2] - v[0][2]; |
| 114 |
|
|
for (i = 2; i < n; i++) { |
| 115 |
|
|
v2[0] = v[i][0] - v[0][0]; |
| 116 |
|
|
v2[1] = v[i][1] - v[0][1]; |
| 117 |
|
|
v2[2] = v[i][2] - v[0][2]; |
| 118 |
|
|
fcross(v3, v1, v2); |
| 119 |
|
|
norm[0] += v3[0]; |
| 120 |
|
|
norm[1] += v3[1]; |
| 121 |
|
|
norm[2] += v3[2]; |
| 122 |
|
|
VCOPY(v1, v2); |
| 123 |
|
|
} |
| 124 |
|
|
if (cent != NULL) { /* compute center also */ |
| 125 |
|
|
cent[0] = cent[1] = cent[2] = 0.; |
| 126 |
|
|
for (i = n; i--; ) { |
| 127 |
|
|
cent[0] += v[i][0]; |
| 128 |
|
|
cent[1] += v[i][1]; |
| 129 |
|
|
cent[2] += v[i][2]; |
| 130 |
|
|
} |
| 131 |
|
|
d = 1./n; |
| 132 |
|
|
cent[0] *= d; cent[1] *= d; cent[2] *= d; |
| 133 |
|
|
} |
| 134 |
|
|
return(normalize(norm)*.5); |
| 135 |
|
|
} |
| 136 |
|
|
|
| 137 |
|
|
|
| 138 |
greg |
3.4 |
static void |
| 139 |
gwlarson |
3.2 |
glu_error(en) /* report an error as a warning */ |
| 140 |
gwlarson |
3.1 |
GLenum en; |
| 141 |
|
|
{ |
| 142 |
|
|
sprintf(errmsg, "GLU error %s: %s", glu_rout, gluErrorString(en)); |
| 143 |
|
|
error(WARNING, errmsg); |
| 144 |
|
|
} |
| 145 |
|
|
|
| 146 |
|
|
|
| 147 |
gwlarson |
3.3 |
static void |
| 148 |
|
|
myCombine(coords, vertex_data, weight, dataOut) |
| 149 |
|
|
register GLdouble coords[3]; |
| 150 |
|
|
GLdouble *vertex_data[4]; |
| 151 |
|
|
GLfloat weight[4]; |
| 152 |
|
|
GLdouble **dataOut; |
| 153 |
|
|
{ |
| 154 |
|
|
register GLdouble *newvert; |
| 155 |
|
|
|
| 156 |
|
|
newvert = (GLdouble *)malloc(3*sizeof(GLdouble)); |
| 157 |
|
|
if (newvert == NULL) |
| 158 |
|
|
error(SYSTEM, "out of memory in myCombine"); |
| 159 |
|
|
VCOPY(newvert, coords); /* no data, just coordinates */ |
| 160 |
|
|
*dataOut = newvert; |
| 161 |
|
|
} |
| 162 |
|
|
|
| 163 |
|
|
|
| 164 |
gwlarson |
3.1 |
static |
| 165 |
|
|
newtess() /* allocate GLU tessellation object */ |
| 166 |
|
|
{ |
| 167 |
|
|
if ((gluto = gluNewTess()) == NULL) |
| 168 |
|
|
error(INTERNAL, "gluNewTess failed"); |
| 169 |
greg |
3.4 |
gluTessCallback(gluto, GLU_TESS_BEGIN, (_GLUfuncptr)glBegin); |
| 170 |
|
|
gluTessCallback(gluto, GLU_TESS_VERTEX, (_GLUfuncptr)glVertex3dv); |
| 171 |
gwlarson |
3.1 |
gluTessCallback(gluto, GLU_TESS_END, glEnd); |
| 172 |
gwlarson |
3.3 |
gluTessCallback(gluto, GLU_TESS_COMBINE, myCombine); |
| 173 |
gwlarson |
3.1 |
gluTessCallback(gluto, GLU_TESS_ERROR, glu_error); |
| 174 |
|
|
gluTessProperty(gluto, GLU_TESS_WINDING_RULE, GLU_TESS_WINDING_NONZERO); |
| 175 |
|
|
} |
| 176 |
|
|
|
| 177 |
|
|
|
| 178 |
|
|
static |
| 179 |
|
|
newquadric() /* allocate GLU quadric structure */ |
| 180 |
|
|
{ |
| 181 |
|
|
if ((gluqo = gluNewQuadric()) == NULL) |
| 182 |
|
|
error(INTERNAL, "gluNewQuadric failed"); |
| 183 |
|
|
gluQuadricDrawStyle(gluqo, GLU_FILL); |
| 184 |
|
|
gluQuadricCallback(gluqo, GLU_ERROR, glu_error); |
| 185 |
|
|
} |
| 186 |
|
|
|
| 187 |
|
|
|
| 188 |
greg |
3.4 |
int |
| 189 |
gwlarson |
3.1 |
o_face(o) /* convert a face */ |
| 190 |
|
|
register OBJREC *o; |
| 191 |
|
|
{ |
| 192 |
|
|
double area; |
| 193 |
|
|
FVECT norm, cent; |
| 194 |
|
|
register int i; |
| 195 |
|
|
|
| 196 |
|
|
if (o->oargs.nfargs < 9 | o->oargs.nfargs % 3) |
| 197 |
|
|
objerror(o, USER, "bad # real arguments"); |
| 198 |
|
|
area = polyarea(cent, norm, o->oargs.nfargs/3, (FVECT *)o->oargs.farg); |
| 199 |
|
|
if (area <= FTINY) |
| 200 |
|
|
return; |
| 201 |
|
|
if (dolights) /* check for source */ |
| 202 |
greg |
3.4 |
doflatsrc((MATREC *)o->os, cent, norm, area); |
| 203 |
|
|
setmaterial((MATREC *)o->os, cent, 1); /* set material */ |
| 204 |
gwlarson |
3.1 |
if (o->oargs.nfargs/3 != curpolysize) { |
| 205 |
|
|
if (curpolysize) glEnd(); |
| 206 |
|
|
curpolysize = o->oargs.nfargs/3; |
| 207 |
|
|
if (curpolysize == 3) |
| 208 |
|
|
glBegin(GL_TRIANGLES); |
| 209 |
|
|
else if (curpolysize == 4) |
| 210 |
|
|
glBegin(GL_QUADS); |
| 211 |
|
|
} |
| 212 |
|
|
glNormal3d((GLdouble)norm[0], (GLdouble)norm[1], (GLdouble)norm[2]); |
| 213 |
|
|
if (curpolysize > 4) { |
| 214 |
|
|
if (gluto == NULL) newtess(); |
| 215 |
|
|
glu_rout = "tessellating polygon"; |
| 216 |
|
|
gluTessNormal(gluto, (GLdouble)norm[0], |
| 217 |
|
|
(GLdouble)norm[1], (GLdouble)norm[2]); |
| 218 |
|
|
gluTessBeginPolygon(gluto, NULL); |
| 219 |
|
|
gluTessBeginContour(gluto); |
| 220 |
|
|
#ifdef SMLFLT |
| 221 |
|
|
error(INTERNAL, "bad code segment in o_face"); |
| 222 |
|
|
#endif |
| 223 |
|
|
for (i = 0; i < curpolysize; i++) |
| 224 |
|
|
gluTessVertex(gluto, (GLdouble *)(o->oargs.farg+3*i), |
| 225 |
|
|
(void *)(o->oargs.farg+3*i)); |
| 226 |
|
|
gluTessEndContour(gluto); |
| 227 |
|
|
gluTessEndPolygon(gluto); |
| 228 |
|
|
curpolysize = 0; |
| 229 |
|
|
} else { |
| 230 |
|
|
for (i = 0; i < curpolysize; i++) |
| 231 |
|
|
glVertex3d((GLdouble)o->oargs.farg[3*i], |
| 232 |
|
|
(GLdouble)o->oargs.farg[3*i+1], |
| 233 |
|
|
(GLdouble)o->oargs.farg[3*i+2]); |
| 234 |
|
|
} |
| 235 |
|
|
} |
| 236 |
|
|
|
| 237 |
|
|
|
| 238 |
greg |
3.4 |
void |
| 239 |
gwlarson |
3.1 |
surfclean() /* clean up surface routines */ |
| 240 |
|
|
{ |
| 241 |
|
|
setmaterial(NULL, NULL, 0); |
| 242 |
|
|
if (gluqo != NULL) { |
| 243 |
|
|
gluDeleteQuadric(gluqo); |
| 244 |
|
|
gluqo = NULL; |
| 245 |
|
|
} |
| 246 |
|
|
if (gluto != NULL) { |
| 247 |
|
|
gluDeleteTess(gluto); |
| 248 |
|
|
gluto = NULL; |
| 249 |
|
|
} |
| 250 |
|
|
rgl_checkerr("in surfclean"); |
| 251 |
|
|
} |
| 252 |
|
|
|
| 253 |
|
|
|
| 254 |
greg |
3.4 |
int |
| 255 |
gwlarson |
3.1 |
o_sphere(o) /* convert a sphere */ |
| 256 |
|
|
register OBJREC *o; |
| 257 |
|
|
{ |
| 258 |
|
|
/* check arguments */ |
| 259 |
|
|
if (o->oargs.nfargs != 4) |
| 260 |
|
|
objerror(o, USER, "bad # real arguments"); |
| 261 |
|
|
if (o->oargs.farg[3] < -FTINY) { |
| 262 |
|
|
o->otype = o->otype==OBJ_SPHERE ? OBJ_BUBBLE : OBJ_SPHERE; |
| 263 |
|
|
o->oargs.farg[3] = -o->oargs.farg[3]; |
| 264 |
|
|
} else if (o->oargs.farg[3] <= FTINY) |
| 265 |
|
|
return; |
| 266 |
|
|
if (dolights) |
| 267 |
greg |
3.4 |
dosphsrc((MATREC *)o->os, o->oargs.farg, |
| 268 |
gwlarson |
3.1 |
PI*o->oargs.farg[3]*o->oargs.farg[3]); |
| 269 |
greg |
3.4 |
setmaterial((MATREC *)o->os, o->oargs.farg, 0); |
| 270 |
gwlarson |
3.1 |
if (gluqo == NULL) newquadric(); |
| 271 |
|
|
glu_rout = "making sphere"; |
| 272 |
|
|
gluQuadricOrientation(gluqo, |
| 273 |
|
|
o->otype==OBJ_BUBBLE ? GLU_INSIDE : GLU_OUTSIDE); |
| 274 |
|
|
gluQuadricNormals(gluqo, GLU_SMOOTH); |
| 275 |
|
|
glMatrixMode(GL_MODELVIEW); |
| 276 |
|
|
glPushMatrix(); |
| 277 |
|
|
glTranslated((GLdouble)o->oargs.farg[0], (GLdouble)o->oargs.farg[1], |
| 278 |
|
|
(GLdouble)o->oargs.farg[2]); |
| 279 |
|
|
gluSphere(gluqo, (GLdouble)o->oargs.farg[3], NSLICES, NSTACKS); |
| 280 |
|
|
glPopMatrix(); |
| 281 |
|
|
} |
| 282 |
|
|
|
| 283 |
|
|
|
| 284 |
greg |
3.4 |
int |
| 285 |
gwlarson |
3.1 |
o_cone(o) /* convert a cone or cylinder */ |
| 286 |
|
|
register OBJREC *o; |
| 287 |
|
|
{ |
| 288 |
|
|
double x1, y1, h, d; |
| 289 |
|
|
FVECT cent; |
| 290 |
|
|
register int iscyl; |
| 291 |
|
|
|
| 292 |
|
|
iscyl = o->otype==OBJ_CYLINDER | o->otype==OBJ_TUBE; |
| 293 |
|
|
if (o->oargs.nfargs != (iscyl ? 7 : 8)) |
| 294 |
greg |
3.4 |
objerror(o, USER, "bad # real arguments"); |
| 295 |
gwlarson |
3.1 |
if (o->oargs.farg[6] < -FTINY) { |
| 296 |
|
|
o->oargs.farg[6] = -o->oargs.farg[6]; |
| 297 |
|
|
if (iscyl) |
| 298 |
|
|
o->otype = o->otype==OBJ_CYLINDER ? |
| 299 |
|
|
OBJ_TUBE : OBJ_CYLINDER; |
| 300 |
|
|
else { |
| 301 |
|
|
if ((o->oargs.farg[7] = -o->oargs.farg[7]) < -FTINY) |
| 302 |
|
|
objerror(o, USER, "illegal radii"); |
| 303 |
|
|
o->otype = o->otype==OBJ_CONE ? OBJ_CUP : OBJ_CONE; |
| 304 |
|
|
} |
| 305 |
|
|
} else if (!iscyl && o->oargs.farg[7] < -FTINY) |
| 306 |
|
|
objerror(o, USER, "illegal radii"); |
| 307 |
|
|
if (o->oargs.farg[6] <= FTINY && (iscyl || o->oargs.farg[7] <= FTINY)) |
| 308 |
|
|
return; |
| 309 |
gwlarson |
3.3 |
if (!iscyl) { |
| 310 |
|
|
if (o->oargs.farg[6] < 0.) /* complains for tiny neg's */ |
| 311 |
|
|
o->oargs.farg[6] = 0.; |
| 312 |
|
|
if (o->oargs.farg[7] < 0.) |
| 313 |
|
|
o->oargs.farg[7] = 0.; |
| 314 |
|
|
} |
| 315 |
gwlarson |
3.1 |
cent[0] = .5*(o->oargs.farg[0] + o->oargs.farg[3]); |
| 316 |
|
|
cent[1] = .5*(o->oargs.farg[1] + o->oargs.farg[4]); |
| 317 |
|
|
cent[2] = .5*(o->oargs.farg[2] + o->oargs.farg[5]); |
| 318 |
greg |
3.4 |
setmaterial((MATREC *)o->os, cent, 0); |
| 319 |
gwlarson |
3.1 |
if (gluqo == NULL) newquadric(); |
| 320 |
|
|
glu_rout = "making cylinder"; |
| 321 |
|
|
gluQuadricOrientation(gluqo, o->otype==OBJ_CUP | o->otype==OBJ_TUBE ? |
| 322 |
|
|
GLU_INSIDE : GLU_OUTSIDE); |
| 323 |
|
|
gluQuadricNormals(gluqo, GLU_SMOOTH); |
| 324 |
|
|
glMatrixMode(GL_MODELVIEW); |
| 325 |
|
|
glPushMatrix(); |
| 326 |
|
|
/* do base translation */ |
| 327 |
|
|
glTranslated((GLdouble)o->oargs.farg[0], (GLdouble)o->oargs.farg[1], |
| 328 |
|
|
(GLdouble)o->oargs.farg[2]); |
| 329 |
|
|
/* compute height & rotation angle */ |
| 330 |
|
|
h = sqrt(dist2(o->oargs.farg,o->oargs.farg+3)); |
| 331 |
|
|
if (h <= FTINY) |
| 332 |
|
|
return; |
| 333 |
|
|
x1 = o->oargs.farg[1] - o->oargs.farg[4]; |
| 334 |
|
|
y1 = o->oargs.farg[3] - o->oargs.farg[0]; |
| 335 |
|
|
/* z1 = 0; */ |
| 336 |
|
|
d = 180./PI * asin(sqrt(x1*x1 + y1*y1) / h); |
| 337 |
|
|
if (o->oargs.farg[5] < o->oargs.farg[2]) |
| 338 |
|
|
d = 180. - d; |
| 339 |
|
|
if (d > FTINY) |
| 340 |
|
|
glRotated(d, (GLdouble)x1, (GLdouble)y1, 0.); |
| 341 |
|
|
gluCylinder(gluqo, o->oargs.farg[6], o->oargs.farg[iscyl ? 6 : 7], |
| 342 |
|
|
h, NSLICES, 1); |
| 343 |
|
|
glPopMatrix(); |
| 344 |
|
|
} |
| 345 |
|
|
|
| 346 |
|
|
|
| 347 |
greg |
3.4 |
int |
| 348 |
gwlarson |
3.1 |
o_ring(o) /* convert a ring */ |
| 349 |
|
|
register OBJREC *o; |
| 350 |
|
|
{ |
| 351 |
|
|
double x1, y1, d; |
| 352 |
|
|
|
| 353 |
|
|
if (o->oargs.nfargs != 8) |
| 354 |
greg |
3.4 |
objerror(o, USER, "bad # real arguments"); |
| 355 |
gwlarson |
3.1 |
if (o->oargs.farg[7] < o->oargs.farg[6]) { |
| 356 |
|
|
register double d = o->oargs.farg[7]; |
| 357 |
|
|
o->oargs.farg[7] = o->oargs.farg[6]; |
| 358 |
|
|
o->oargs.farg[6] = d; |
| 359 |
|
|
} |
| 360 |
|
|
if (o->oargs.farg[6] < -FTINY) |
| 361 |
|
|
objerror(o, USER, "negative radius"); |
| 362 |
|
|
if (o->oargs.farg[6] < 0.) /* complains for tiny neg's */ |
| 363 |
|
|
o->oargs.farg[6] = 0.; |
| 364 |
|
|
if (o->oargs.farg[7] - o->oargs.farg[6] <= FTINY) |
| 365 |
|
|
return; |
| 366 |
|
|
if (dolights) |
| 367 |
greg |
3.4 |
doflatsrc((MATREC *)o->os, o->oargs.farg, o->oargs.farg+3, |
| 368 |
gwlarson |
3.1 |
PI*(o->oargs.farg[7]*o->oargs.farg[7] - |
| 369 |
|
|
o->oargs.farg[6]*o->oargs.farg[6])); |
| 370 |
greg |
3.4 |
setmaterial((MATREC *)o->os, o->oargs.farg, 0); |
| 371 |
gwlarson |
3.1 |
if (gluqo == NULL) newquadric(); |
| 372 |
|
|
glu_rout = "making disk"; |
| 373 |
|
|
gluQuadricOrientation(gluqo, GLU_OUTSIDE); |
| 374 |
|
|
gluQuadricNormals(gluqo, GLU_FLAT); |
| 375 |
|
|
glMatrixMode(GL_MODELVIEW); |
| 376 |
|
|
glPushMatrix(); |
| 377 |
|
|
glTranslated((GLdouble)o->oargs.farg[0], (GLdouble)o->oargs.farg[1], |
| 378 |
|
|
(GLdouble)o->oargs.farg[2]); |
| 379 |
|
|
/* compute rotation angle */ |
| 380 |
|
|
d = VLEN(o->oargs.farg+3); |
| 381 |
|
|
if (d <= FTINY) |
| 382 |
|
|
return; |
| 383 |
|
|
x1 = -o->oargs.farg[4]; |
| 384 |
|
|
y1 = o->oargs.farg[3]; |
| 385 |
|
|
/* z1 = 0; */ |
| 386 |
|
|
d = 180./PI * asin(sqrt(x1*x1 + y1*y1) / d); |
| 387 |
|
|
if (o->oargs.farg[5] < 0.) |
| 388 |
|
|
d = 180. - d; |
| 389 |
|
|
if (d > FTINY) |
| 390 |
|
|
glRotated(d, (GLdouble)x1, (GLdouble)y1, 0.); |
| 391 |
|
|
gluDisk(gluqo, o->oargs.farg[6], o->oargs.farg[7], NSLICES, 1); |
| 392 |
|
|
glPopMatrix(); |
| 393 |
|
|
} |
