random start screen image

application.cpp

@@ -802,6 +802,8 @@ eu07_application::init_data() {
 
 int
 eu07_application::init_modes() {
+	Global.local_random_engine.seed(std::random_device{}());
+
 	if ((!Global.network_servers.empty() || Global.network_client) && Global.SceneryFile.empty()) {
 		ErrorLog("launcher mode is currently not supported in network mode");
 		return -1;

launcher/launchermode.cpp

@@ -26,7 +26,6 @@ void launcher_mode::enter()
 
 	simulation::is_ready = false;
 
-	m_userinterface->set_background( "logo" );
 	Application.set_title(Global.AppName);
 }
 

launcher/launcheruilayer.cpp

@@ -12,6 +12,8 @@ launcher_ui::launcher_ui()
 	add_external_panel(&m_scenerylist_panel);
 	add_external_panel(&m_keymapper_panel);
 	add_external_panel(&m_vehiclepicker_panel);
+
+	load_random_background();
 }
 
 bool launcher_ui::on_key(const int Key, const int Action)

scenarioloadermode.cpp

@@ -80,7 +80,6 @@ scenarioloader_mode::enter() {
 
     simulation::is_ready = false;
 
-    m_userinterface->set_background( "logo" );
     Application.set_title( Global.AppName + " (" + Global.SceneryFile + ")" );
     m_userinterface->set_progress();
 	m_userinterface->set_progress(STR("Loading scenery"));

scenarioloaderuilayer.h

@@ -12,6 +12,9 @@ http://mozilla.org/MPL/2.0/.
 #include "uilayer.h"
 
 class scenarioloader_ui : public ui_layer {
-
+public:
+	scenarioloader_ui() : ui_layer() {
+		load_random_background();
+	}
     // TODO: implement mode-specific elements
 };

uilayer.cpp

@@ -128,6 +128,19 @@ ui_layer::ui_layer()
     m_logpanel.size = { 700, 400 };
 }
 
+void::ui_layer::load_random_background()
+{
+	std::vector<std::string> images;
+	for (auto &f : std::filesystem::directory_iterator("textures/logo"))
+		if (f.is_regular_file())
+			images.emplace_back(std::filesystem::relative(f.path(), "textures/").string());
+
+	if (!images.empty()) {
+		std::string &selected = images[std::lround(LocalRandom(images.size() - 1))];
+		set_background(selected);
+	}
+}
+
 static ImVec4 imvec_lerp(const ImVec4& a, const ImVec4& b, float t)
 {
 	return ImVec4(a.x + (b.x - a.x) * t, a.y + (b.y - a.y) * t, a.z + (b.z - a.z) * t, a.w + (b.w - a.w) * t);

uilayer.h

@@ -156,6 +156,7 @@ protected:
     static ImGuiIO *m_imguiio;
     static bool m_cursorvisible;    
 
+	void load_random_background();
    virtual void render_menu_contents();
    ui_log_panel m_logpanel { "Log", true };