g4Text.cc

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// g4Text.cc
//
// Implementation of g4display scene-text option parsing.
// Doxygen documentation is authoritative in g4Text.h (see rule 7).
 
#include "g4Text.h"
 
// c++
using namespace std;
 
namespace g4display {
// Return a vector of G4SceneText parsed from the "g4text" structured option node.
vector<G4SceneText> getSceneTexts(const std::shared_ptr<GOptions>& gopts) {
    vector<G4SceneText> st;
 
    auto g4t_node = gopts->getOptionNode("g4text");
 
    // Each node entry becomes one text annotation.
    for (auto g4t_item : g4t_node) {
        G4SceneText st_item;
 
        st_item.text  = gopts->get_variable_in_option<string>(g4t_item, "text", goptions::NODFLT);
        st_item.color = gopts->get_variable_in_option<string>(g4t_item, "color", "black");
        st_item.x     = gopts->get_variable_in_option<double>(g4t_item, "x", 0);
        st_item.y     = gopts->get_variable_in_option<double>(g4t_item, "y", 0);
        st_item.z     = gopts->get_variable_in_option<double>(g4t_item, "z", GNOT_SPECIFIED_SCENE_TEXT_Z);
        st_item.size  = gopts->get_variable_in_option<double>(g4t_item, "size", 24.0);
 
        st.push_back(st_item);
    }
 
    return st;
}
 
// Define the g4text option schema and help string.
GOptions addSceneTextsOptions() {
    GOptions goptions;
    string   help;
 
    // g4text
    help = "If the z coordinate is specified, the text is considered 2D. \n \n";
    help += "Example to add two texts: \n \n";
    help += "-g4text=\"[{text: hello, x: -100}, {text: there, x: 100}]\"\n";
 
    vector<GVariable> g4text = {
        {"text", goptions::NODFLT, "string with the text to be displayed"},
        {"color", "black", "color of the text"},
        {"x", 0, "x position of the text"},
        {"y", 0, "y position of the text"},
        {"z", GNOT_SPECIFIED_SCENE_TEXT_Z, "z position of the text"},
        {"size", 24.0, "size of the text"},
    };
 
    goptions.defineOption("g4text", "Insert texts in the current scene", g4text, help);
 
    return goptions;
}
} // namespace g4display