/*
Initializes opengl states
*/
void glutWidget::initOpenGL()
{
glewExperimental = GL_TRUE;
GLenum err = glewInit(); //initialize GLEW - this enables us to use extensions
if(err != GLEW_OK)
{
std::cout << "ERROR: Loading GLEW failed." << std::endl;
exit(-1);
}
checkExtensions();
glClearColor(1, 1, 1, 0); //default "empty"/background color is set to white
glEnable(GL_DEPTH_TEST);
CBitmap skybox("skybox.bmp"); //read bitmap image
glGenTextures(1, &m_texture); //allocate 1 texture
glUniform1i(skybox_texture, 0); //pass texture location to vertex shader
glBindTexture(GL_TEXTURE_2D, skybox_texture); //bind this texture to be active
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, skybox.GetWidth(), skybox.GetHeight(), 0, GL_RGBA, GL_UNSIGNED_BYTE, skybox.GetBits());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); //specify minificaton filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); //specify magnificaton filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); //specify texture coordinate treatment
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); //specify texture coordinate treatment
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE); //specify texture coordinate treatment
glBindTexture(GL_TEXTURE_2D, 0);
CBitmap streets("streets.bmp"); //read bitmap image
glGenTextures(1, &street_texture); //allocate 1 texture
glUniform1i(street_texture, 0); //pass texture location to vertex shader
glBindTexture(GL_TEXTURE_2D, street_texture); //bind this texture to be active
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, streets.GetWidth(), streets.GetHeight(), 0, GL_RGBA, GL_UNSIGNED_BYTE, streets.GetBits());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); //specify minificaton filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); //specify magnificaton filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); //specify texture coordinate treatment
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); //specify texture coordinate treatment
glBindTexture(GL_TEXTURE_2D, 0); //bind default texture to be active
CBitmap car("car.bmp"); //read bitmap image
glGenTextures(1, &car_texture); //allocate 1 texture
glUniform1i(car_texture, 0); //pass texture location to vertex shader
glBindTexture(GL_TEXTURE_2D, car_texture); //bind this texture to be active
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, car.GetWidth(), car.GetHeight(), 0, GL_RGBA, GL_UNSIGNED_BYTE, car.GetBits());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); //specify minificaton filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); //specify magnificaton filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); //specify texture coordinate treatment
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); //specify texture coordinate treatment
glBindTexture(GL_TEXTURE_2D, 0); //bind default texture to be active
CBitmap structure("structure.bmp"); //read bitmap image
glGenTextures(1, &structure_texture); //allocate 1 texture
glUniform1i(structure_texture, 0); //pass texture location to vertex shader
glBindTexture(GL_TEXTURE_2D, structure_texture); //bind this texture to be active
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, structure.GetWidth(), structure.GetHeight(), 0, GL_RGBA, GL_UNSIGNED_BYTE, structure.GetBits());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); //specify minificaton filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); //specify magnificaton filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); //specify texture coordinate treatment
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); //specify texture coordinate treatment
glBindTexture(GL_TEXTURE_2D, 0); //bind default texture to be active
CBitmap wall("wall.bmp"); //read bitmap image
glGenTextures(1, &wall_texture); //allocate 1 texture
glUniform1i(wall_texture, 0); //pass texture location to vertex shader
glBindTexture(GL_TEXTURE_2D, wall_texture); //bind this texture to be active
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, wall.GetWidth(), wall.GetHeight(), 0, GL_RGBA, GL_UNSIGNED_BYTE, wall.GetBits());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); //specify minificaton filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); //specify magnificaton filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); //specify texture coordinate treatment
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); //specify texture coordinate treatment
glBindTexture(GL_TEXTURE_2D, 0); //bind default texture to be active
makeShaders(); //load data of fragment and vertex programs/shaders - compile shaders
glMatrixMode(GL_PROJECTION);
glLoadIdentity(); //initializes projection matrix with identity
gluPerspective(60,(float)m_width/(float)m_height,0.1,1000); //set up projection mode (field of view, aspect ratio, near and far clipping plane)
glMatrixMode(GL_MODELVIEW);
glLoadIdentity(); //initializes modelview matrix with identity
glEnable(GL_CULL_FACE);
}
// static
void StreetsMatcher::FindStreets(BaseContext const & ctx, FeaturesFilter const & filter,
QueryParams const & params, vector<Prediction> & predictions)
{
for (size_t startToken = 0; startToken < ctx.m_numTokens; ++startToken)
{
if (ctx.m_usedTokens[startToken])
continue;
// Here we try to match as many tokens as possible while
// intersection is a non-empty bit vector of streets. Single
// tokens that are synonyms to streets are ignored. Moreover,
// each time a token that looks like a beginning of a house number
// is met, we try to use current intersection of tokens as a
// street layer and try to match BUILDINGs or POIs.
CBV streets(ctx.m_streets);
CBV all;
all.SetFull();
size_t curToken = startToken;
// This variable is used for prevention of duplicate calls to
// CreateStreetsLayerAndMatchLowerLayers() with the same
// arguments.
size_t lastToken = startToken;
// When true, no bit vectors were intersected with |streets| at all.
bool emptyIntersection = true;
// When true, |streets| is in the incomplete state and can't be
// used for creation of street layers.
bool incomplete = false;
auto emit = [&]()
{
if (!streets.IsEmpty() && !emptyIntersection && !incomplete && lastToken != curToken)
{
CBV fs(streets);
CBV fa(all);
ASSERT(!fs.IsFull(), ());
ASSERT(!fa.IsFull(), ());
if (filter.NeedToFilter(fs))
fs = filter.Filter(fs);
if (fs.IsEmpty())
return;
if (filter.NeedToFilter(fa))
fa = filter.Filter(fa).Union(fs);
predictions.emplace_back();
auto & prediction = predictions.back();
prediction.m_startToken = startToken;
prediction.m_endToken = curToken;
ASSERT_NOT_EQUAL(fs.PopCount(), 0, ());
ASSERT_LESS_OR_EQUAL(fs.PopCount(), fa.PopCount(), ());
prediction.m_prob = static_cast<double>(fs.PopCount()) / static_cast<double>(fa.PopCount());
prediction.m_features = move(fs);
prediction.m_hash = prediction.m_features.Hash();
}
};
StreetTokensFilter filter([&](strings::UniString const & /* token */, size_t tag)
{
auto buffer = streets.Intersect(ctx.m_features[tag]);
if (tag < curToken)
{
// This is the case for delayed
// street synonym. Therefore,
// |streets| is temporarily in the
// incomplete state.
streets = buffer;
all = all.Intersect(ctx.m_features[tag]);
emptyIntersection = false;
incomplete = true;
return;
}
ASSERT_EQUAL(tag, curToken, ());
// |streets| will become empty after
// the intersection. Therefore we need
// to create streets layer right now.
if (buffer.IsEmpty())
emit();
streets = buffer;
all = all.Intersect(ctx.m_features[tag]);
emptyIntersection = false;
incomplete = false;
});
