void MainWindow::keyPressEvent(QKeyEvent *event)
{
switch(event->key())
{
case Qt::Key_S:
settingsWidget->show();
settingsWidget->raise();
break;
case Qt::Key_G:
createDistanceField();
break;
case Qt::Key_I:
addVertex();
break;
case Qt::Key_D:
if(mainSpline->getPoints().size() > 3)
deleteVertex();
break;
default:
event->ignore();
}
}
int main(int argc, char** argv) {
osg::ArgumentParser args(&argc, argv);
osgViewer::Viewer viewer(args);
osgDB::FilePathList& paths = osgDB::getDataFilePathList();
paths.push_back("../examples/osgcairodistancefield");
paths.push_back("examples/osgcairodistancefield");
paths.push_back(".");
std::string vertPath = "shaders/normal-vert.glsl";
std::string fragPath = "shaders/normal-frag.glsl";
while(args.read("--outline")) {
fragPath = "shaders/outline-frag.glsl";
}
while(args.read("--shifted")) {
vertPath = "shaders/shifted-vert.glsl";
fragPath = "shaders/shifted-frag.glsl";
}
if(args.argc() != 4) {
OSG_FATAL << "usage: osgcairodistancefield <surface_size> <scan_size> <block_size>" << std::endl;
return 1;
}
vertPath = osgDB::findDataFile(vertPath);
fragPath = osgDB::findDataFile(fragPath);
cairo_surface_t* distanceField = createDistanceField(
std::atoi(args[1]),
std::atoi(args[2]),
std::atoi(args[3])
);
osg::Geode* geode = createDistanceFieldGeode(distanceField);
osg::Geode* bg = createBackgroundGeode(WIDTH, HEIGHT);
osg::Camera* camera = createOrthoCamera(WIDTH, HEIGHT);
osg::Program* program = new osg::Program();
osg::Shader* vert = osg::Shader::readShaderFile(osg::Shader::VERTEX, vertPath);
osg::Shader* frag = osg::Shader::readShaderFile(osg::Shader::FRAGMENT, fragPath);
float scale = 1.0f;
float aMin = std::max(0.0f, 0.5f - 0.07f / scale);
float aMax = std::min(0.5f + 0.07f / scale, 1.0f);
float radius = 1.0f;
float ol = std::max(double(0.2f), double(0.5 - 0.5 / radius));
float oaMax0 = std::max(double(0.0f), ol - 0.07 / scale);
float oaMax1 = std::min(ol + 0.07 / scale, double(aMin));
osg::Uniform* color = new osg::Uniform("Color", osg::Vec4(1.0f, 1.0f, 1.0f, 1.0f));
osg::Uniform* styleColor = new osg::Uniform("StyleColor", osg::Vec4(0.0f, 0.0f, 0.0f, 1.0f));
osg::Uniform* alphaMin = new osg::Uniform("AlphaMin", aMin);
osg::Uniform* alphaMax = new osg::Uniform("AlphaMax", aMax);
osg::Uniform* alphaMax0 = new osg::Uniform("OutlineAlphaMax0", oaMax0);
osg::Uniform* alphaMax1 = new osg::Uniform("OutlineAlphaMax1", oaMax1);
osg::Uniform* texture = new osg::Uniform(osg::Uniform::SAMPLER_2D, "Texture");
texture->set(0);
program->addShader(vert);
program->addShader(frag);
osg::MatrixTransform* matrix = new osg::MatrixTransform();
matrix->getOrCreateStateSet()->setAttributeAndModes(program);
matrix->getOrCreateStateSet()->addUniform(color);
matrix->getOrCreateStateSet()->addUniform(styleColor);
matrix->getOrCreateStateSet()->addUniform(alphaMin);
matrix->getOrCreateStateSet()->addUniform(alphaMax);
matrix->getOrCreateStateSet()->addUniform(alphaMax0);
matrix->getOrCreateStateSet()->addUniform(alphaMax1);
matrix->getOrCreateStateSet()->addUniform(texture);
matrix->addChild(geode);
camera->addChild(matrix);
camera->addChild(bg);
viewer.setSceneData(camera);
viewer.setUpViewInWindow(50, 50, WIDTH, HEIGHT);
viewer.addEventHandler(new ScaleSet());
int r = viewer.run();
cairo_surface_destroy(distanceField);
return r;
}
