Animator won't crash anymore when there's an error, and instead displays an error message.

tools/animator.cpp

@@ -104,10 +104,13 @@ namespace animator {
   }
 
   void FSM::change_form(int direction) {
-    dbc::check($anim.forms.size() > 0, "you can't use an empty animation.forms idiot.");
+    if($anim.forms.size() == 0) {
+      $ui.show_error("NO FORMS!");
+      return;
+    }
 
     $cur_form_i = std::clamp($cur_form_i + direction, 0, int($anim.forms.size()) - 1);
-    dbc::check($cur_form_i >= 0, "you fucked up, Zed");
+    dbc::check($cur_form_i >= 0, "CATASTROPHE! cur_form_i went below 0. How?");
 
     // this is the dumbest shit ever
     auto key_view = std::views::keys($anim.forms);
@@ -157,12 +160,34 @@ namespace animator {
   }
 
   void FSM::reload() {
-    $anim = animate2::load("assets/animate2.json", $anim_name);
+    animate2::Animate2 new_anim;
 
-    // BUG: this will throw the index off after reloads, oh well
-    $anim.set_form($cur_form);
-    $last_mod_time = std::filesystem::last_write_time("assets/animate2.json");
+    try {
+      new_anim = animate2::load("assets/animate2.json", $anim_name);
+    } catch(...) {
+      $ui.show_error("Failed to load JSON");
+      return;
+    }
 
+    if(!new_anim.has_form($cur_form)) {
+      $ui.show_error(fmt::format("No form {}", $cur_form));
+      $cur_form = "idle";
+      $cur_form_i = 0;
+    }
+
+    new_anim.set_form($cur_form);
+
+    try {
+      $last_mod_time = std::filesystem::last_write_time("assets/animate2.json");
+    } catch(...) {
+      $ui.show_error("Filesystem error");
+    }
+
+    if($anim.form_name == new_anim.form_name) {
+      $ui.clear_error();
+    }
+
+    $anim = new_anim;
     $anim.play();
   }
 
@@ -233,6 +258,8 @@ namespace animator {
         "[error]");
 
     $overlay.init();
+
+    $initialized_this_sucks_ass = true;
   }
 
   void UI::render(sf::RenderWindow& window, bool debug) {
@@ -255,13 +282,27 @@ namespace animator {
     $overlay.show_text("transform", guecs::to_wstring(anim.transform_name));
   }
 
+  void UI::show_error(const std::string& message) {
+    if($initialized_this_sucks_ass) {
+      $overlay.show_text("error", guecs::to_wstring(message));
+    } else {
+      dbc::log(message);
+    }
+  }
+
+  void UI::clear_error() {
+    if($initialized_this_sucks_ass) {
+      $overlay.show_text("error", L"");
+    }
+  }
+
   std::shared_ptr<sf::Sprite> UI::get_sprite() {
     auto viewer = $ui.entity("viewer");
     return $ui.get<guecs::Sprite>(viewer).sprite;
   }
 }
 
-int error() {
+int error_usage() {
   fmt::println("USAGE: animator -h -b <background> -s <sprite> -a <animation>");
   return 1;
 }
@@ -291,21 +332,21 @@ int main(int argc, char* argv[]) {
         anim_name = optarg;
         break;
       case 'h': // fallthrough
-        error();
+        error_usage();
         break;
       default:
-        return error();
+        return error_usage();
         break;
     }
   }
 
   if(sprite_name == "") {
-    return error();
+    return error_usage();
   } else if(anim_name == "") {
     anim_name = sprite_name; // default to the same
   }
 
-  sound::mute(false);
+  sound::mute(true);
 
   animator::FSM main;
   main.init(sprite_name, anim_name, background);