1 // apt_signs.cxx -- build airport signs on the fly
3 // Written by Curtis Olson, started July 2001.
5 // Copyright (C) 2001 Curtis L. Olson - http://www.flightgear.org/~curt
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
24 # include <simgear_config.h>
28 #include <boost/foreach.hpp>
31 #include <osg/Geometry>
33 #include <osg/MatrixTransform>
34 #include <osg/StateSet>
36 #include <simgear/debug/logstream.hxx>
37 #include <simgear/math/sg_types.hxx>
38 #include <simgear/scene/material/Effect.hxx>
39 #include <simgear/scene/material/EffectGeode.hxx>
40 #include <simgear/scene/material/mat.hxx>
41 #include <simgear/scene/material/matlib.hxx>
43 #include "apt_signs.hxx"
45 #define SIGN "OBJECT_SIGN: "
48 using namespace simgear;
50 // for temporary storage of sign elements
52 element_info(SGMaterial *m, SGMaterialGlyph *g, double h, double c)
53 : material(m), glyph(g), height(h), coverwidth(c)
55 scale = h * m->get_xsize()
56 / (m->get_ysize() < 0.001 ? 1.0 : m->get_ysize());
57 abswidth = c == 0 ? g->get_width() * scale : c;
60 SGMaterialGlyph *glyph;
67 typedef std::vector<element_info*> ElementVec;
69 const double HT[5] = {0.460, 0.610, 0.760, 1.220, 0.760}; // standard panel height sizes
70 const double grounddist = 0.2; // hard-code sign distance from surface for now
71 const double thick = 0.1; // half the thickness of the 3D sign
74 // translation table for "command" to "glyph name"
77 const char *glyph_name;
96 osg::DrawArrays* quads;
98 osg::Vec3Array* vertices;
99 osg::Vec3Array* normals;
101 void addGlyph(SGMaterialGlyph* glyph, double x, double y, double width, double height, const osg::Matrix& xform)
104 vertices->push_back(xform.preMult(osg::Vec3(thick, x, y)));
105 vertices->push_back(xform.preMult(osg::Vec3(thick, x + width, y)));
106 vertices->push_back(xform.preMult(osg::Vec3(thick, x + width, y + height)));
107 vertices->push_back(xform.preMult(osg::Vec3(thick, x, y + height)));
109 // texture coordinates
110 double xoffset = glyph->get_left();
111 double texWidth = glyph->get_width();
113 uvs->push_back(osg::Vec2(xoffset, 0));
114 uvs->push_back(osg::Vec2(xoffset + texWidth, 0));
115 uvs->push_back(osg::Vec2(xoffset + texWidth, 1));
116 uvs->push_back(osg::Vec2(xoffset, 1));
119 for (int i=0; i<4; ++i)
120 normals->push_back(xform.preMult(osg::Vec3(0, -1, 0)));
122 quads->setCount(vertices->size());
125 void addSignCase(double caseWidth, double caseHeight, const osg::Matrix& xform)
127 int last = vertices->size();
128 double texsize = caseWidth / caseHeight;
131 vertices->push_back(osg::Vec3(-thick, -caseWidth, grounddist));
132 vertices->push_back(osg::Vec3(thick, -caseWidth, grounddist));
133 vertices->push_back(osg::Vec3(thick, -caseWidth, grounddist + caseHeight));
134 vertices->push_back(osg::Vec3(-thick, -caseWidth, grounddist + caseHeight));
136 uvs->push_back(osg::Vec2(1, 1));
137 uvs->push_back(osg::Vec2(0.75, 1));
138 uvs->push_back(osg::Vec2(0.75, 0));
139 uvs->push_back(osg::Vec2(1, 0));
141 for (int i=0; i<4; ++i)
142 normals->push_back(osg::Vec3(-1, 0.0, 0));
145 vertices->push_back(osg::Vec3(-thick, -caseWidth, grounddist + caseHeight));
146 vertices->push_back(osg::Vec3(thick, -caseWidth, grounddist + caseHeight));
147 vertices->push_back(osg::Vec3(thick, caseWidth, grounddist + caseHeight));
148 vertices->push_back(osg::Vec3(-thick, caseWidth, grounddist + caseHeight));
150 uvs->push_back(osg::Vec2(1, texsize));
151 uvs->push_back(osg::Vec2(0.75, texsize));
152 uvs->push_back(osg::Vec2(0.75, 0));
153 uvs->push_back(osg::Vec2(1, 0));
155 for (int i=0; i<4; ++i)
156 normals->push_back(osg::Vec3(0, 0, 1));
159 vertices->push_back(osg::Vec3(-thick, caseWidth, grounddist + caseHeight));
160 vertices->push_back(osg::Vec3(thick, caseWidth, grounddist + caseHeight));
161 vertices->push_back(osg::Vec3(thick, caseWidth, grounddist));
162 vertices->push_back(osg::Vec3(-thick, caseWidth, grounddist));
164 uvs->push_back(osg::Vec2(1, 1));
165 uvs->push_back(osg::Vec2(0.75, 1));
166 uvs->push_back(osg::Vec2(0.75, 0));
167 uvs->push_back(osg::Vec2(1, 0));
169 for (int i=0; i<4; ++i)
170 normals->push_back(osg::Vec3(1, 0.0, 0));
173 // transform all the newly added vertices and normals by the matrix
174 for (unsigned int i=last; i<vertices->size(); ++i) {
175 (*vertices)[i]= xform.preMult((*vertices)[i]);
176 (*normals)[i] = xform.preMult((*normals)[i]);
179 quads->setCount(vertices->size());
183 typedef std::map<Effect*, GlyphGeometry*> EffectGeometryMap;
185 GlyphGeometry* makeGeometry(Effect* eff, osg::Group* group)
187 GlyphGeometry* gg = new GlyphGeometry;
189 EffectGeode* geode = new EffectGeode;
190 geode->setEffect(eff);
192 gg->vertices = new osg::Vec3Array;
193 gg->normals = new osg::Vec3Array;
194 gg->uvs = new osg::Vec2Array;
196 osg::Vec4Array* cl = new osg::Vec4Array;
197 cl->push_back(osg::Vec4(1, 1, 1, 1));
199 osg::Geometry* geometry = new osg::Geometry;
200 geometry->setVertexArray(gg->vertices);
201 geometry->setNormalArray(gg->normals);
202 geometry->setNormalBinding(osg::Geometry::BIND_PER_VERTEX);
203 geometry->setColorArray(cl);
204 geometry->setColorBinding(osg::Geometry::BIND_OVERALL);
205 geometry->setTexCoordArray(0, gg->uvs);
207 gg->quads = new osg::DrawArrays(GL_QUADS, 0, gg->vertices->size());
208 geometry->addPrimitiveSet(gg->quads);
209 geode->addDrawable(geometry);
210 group->addChild(geode);
214 // see $FG_ROOT/Docs/README.scenery
219 class AirportSignBuilder::AirportSignBuilderPrivate
222 SGMaterialLib* materials;
223 EffectGeometryMap geometries;
224 osg::MatrixTransform* signsGroup;
225 GlyphGeometry* signCaseGeometry;
227 GlyphGeometry* getGeometry(Effect* eff)
229 EffectGeometryMap::iterator it = geometries.find(eff);
230 if (it != geometries.end()) {
234 GlyphGeometry* gg = makeGeometry(eff, signsGroup);
235 geometries[eff] = gg;
239 void makeFace(const ElementVec& elements, double hpos, const osg::Matrix& xform)
241 BOOST_FOREACH(element_info* element, elements) {
242 GlyphGeometry* gg = getGeometry(element->material->get_effect());
243 gg->addGlyph(element->glyph, hpos, grounddist, element->abswidth, element->height, xform);
244 hpos += element->abswidth;
251 AirportSignBuilder::AirportSignBuilder(SGMaterialLib* mats, const SGGeod& center) :
252 d(new AirportSignBuilderPrivate)
254 d->signsGroup = new osg::MatrixTransform;
255 d->signsGroup->setMatrix(makeZUpFrame(center));
259 d->signCaseGeometry = d->getGeometry(d->materials->find("signcase")->get_effect());
262 osg::Node* AirportSignBuilder::getSignsGroup()
264 return d->signsGroup;
267 AirportSignBuilder::~AirportSignBuilder()
269 EffectGeometryMap::iterator it;
270 for (it = d->geometries.begin(); it != d->geometries.end(); ++it) {
275 void AirportSignBuilder::addSign(const SGGeod& pos, double heading, const std::string& content)
277 double sign_height = 1.0; // meter
278 string newmat = "BlackSign";
279 ElementVec elements1, elements2;
280 element_info *close1 = 0;
281 element_info *close2 = 0;
282 double total_width1 = 0.0;
283 double total_width2 = 0.0;
285 bool isBackside = false;
287 char oldtype = 0, newtype = 0;
288 SGMaterial *material = 0;
290 // Part I: parse & measure
291 for (const char *s = content.data(); *s; s++) {
297 SG_LOG(SG_TERRAIN, SG_ALERT, SIGN "Illegal taxiway sign syntax. Unexpected '{' in '" << content << "'.");
301 } else if (*s == '}') {
303 SG_LOG(SG_TERRAIN, SG_ALERT, SIGN "Illegal taxiway sign syntax. Unexpected '}' in '" << content << "'.");
316 if (s[1] == ',' || s[1] == '}' || s[1] == '=')
320 SG_LOG(SG_TERRAIN, SG_ALERT, SIGN "unclosed { in sign contents");
321 } else if (s[1] == '=') {
322 for (s += 2; *s; s++) {
324 if (s[1] == ',' || s[1] == '}')
328 SG_LOG(SG_TERRAIN, SG_ALERT, SIGN "unclosed { in sign contents");
336 if (name == "@size") {
337 sign_height = strtod(value.data(), 0);
341 if (name.size() == 2 || name.size() == 3) {
343 if (n.size() == 3 && n[2] >= '1' && n[2] <= '5') {
349 sign_height = HT[size < 0 ? 2 : size];
350 newmat = "YellowSign";
355 } else if (n == "@R") {
357 sign_height = HT[size < 0 ? 2 : size];
363 } else if (n == "@L") {
365 sign_height = HT[size < 0 ? 2 : size];
366 newmat = "FramedSign";
371 } else if (n == "@B") {
372 if (size < 0 || size == 3 || size == 4) {
373 sign_height = HT[size < 0 ? 3 : size];
374 newmat = "BlackSign";
381 for (int i = 0; cmds[i].keyword; i++) {
382 if (name == cmds[i].keyword) {
383 name = cmds[i].glyph_name;
388 if (name[0] == '@') {
389 SG_LOG(SG_TERRAIN, SG_ALERT, SIGN "ignoring unknown command `" << name << '\'');
395 material = d->materials->find(newmat);
399 SGMaterialGlyph *glyph = material->get_glyph(name);
401 SG_LOG( SG_TERRAIN, SG_ALERT, SIGN "unsupported glyph '" << *s << '\'');
405 // in managed mode push frame stop and frame start first
407 if (newtype && newtype != oldtype) {
409 elements1.push_back(close1);
410 total_width1 += close1->glyph->get_width() * close1->scale;
414 SGMaterialGlyph *g = material->get_glyph("stop-frame");
416 close1 = new element_info(material, g, sign_height, 0);
417 g = material->get_glyph("start-frame");
419 element_info* e1 = new element_info(material, g, sign_height, 0);
420 elements1.push_back(e1);
421 total_width1 += e1->glyph->get_width() * e1->scale;
424 // now the actually requested glyph (front)
425 element_info* e1 = new element_info(material, glyph, sign_height, 0);
426 elements1.push_back(e1);
427 total_width1 += e1->glyph->get_width() * e1->scale;
429 if (newtype && newtype != oldtype) {
431 elements2.push_back(close2);
432 total_width2 += close2->glyph->get_width() * close2->scale;
436 SGMaterialGlyph *g = material->get_glyph("stop-frame");
438 close2 = new element_info(material, g, sign_height, 0);
439 g = material->get_glyph("start-frame");
441 element_info* e2 = new element_info(material, g, sign_height, 0);
442 elements2.push_back(e2);
443 total_width2 += e2->glyph->get_width() * e2->scale;
446 // now the actually requested glyph (back)
447 element_info* e2 = new element_info(material, glyph, sign_height, 0);
448 elements2.push_back(e2);
449 total_width2 += e2->glyph->get_width() * e2->scale;
453 // in managed mode close frame
455 elements1.push_back(close1);
456 total_width1 += close1->glyph->get_width() * close1->scale;
461 elements2.push_back(close2);
462 total_width2 += close2->glyph->get_width() * close2->scale;
467 double boxwidth = std::max(total_width1, total_width2) * 0.5;
468 double hpos = -boxwidth;
469 SGMaterial *mat = d->materials->find("signcase");
471 double coverSize = fabs(total_width1 - total_width2) * 0.5;
472 element_info* s1 = new element_info(mat, mat->get_glyph("cover1"), sign_height, coverSize);
473 element_info* s2 = new element_info(mat, mat->get_glyph("cover2"), sign_height, coverSize);
475 if (total_width1 < total_width2) {
476 elements1.insert(elements1.begin(), s1);
477 elements1.push_back(s2);
478 } else if (total_width2 < total_width1) {
479 elements2.insert(elements2.begin(), s1);
480 elements2.push_back(s2);
487 const osg::Vec3 Z_AXIS(0, 0, 1);
488 osg::Matrix m(makeZUpFrame(pos));
489 m.preMultRotate(osg::Quat(SGMiscd::deg2rad(heading), Z_AXIS));
491 // apply the inverse of the group transform, so sign vertices
492 // are relative to the tile center, and hence have a magnitude which
493 // fits in a float with sufficent precision.
494 m.postMult(d->signsGroup->getInverseMatrix());
496 d->makeFace(elements1, hpos, m);
499 back.preMultRotate(osg::Quat(M_PI, Z_AXIS));
500 d->makeFace(elements2, hpos, back);
502 d->signCaseGeometry->addSignCase(boxwidth, sign_height, m);
505 } // of namespace simgear