some nametags improvements (#50)

- crouching now hides your nametag entirely
- nametag transparency is now based on player opacity
- nametags are no longer rendered while the player does not have a valid area sync

src/pc/nametags.c

@@ -28,7 +28,7 @@ void name_without_hex(char* input) {
             input[j++] = input[i]; // it just works
         }
     }
-    
+
     input[j] = '\0';
 }
 
@@ -63,6 +63,18 @@ void nametags_render(void) {
         struct MarioState* m = &gMarioStates[i];
         if (!is_player_active(m)) { continue; }
         struct NetworkPlayer* np = &gNetworkPlayers[i];
+        if (!np->currAreaSyncValid) { continue; }
+
+        switch (m->action) {
+            case ACT_START_CROUCHING:
+            case ACT_CROUCHING:
+            case ACT_STOP_CROUCHING:
+            case ACT_START_CRAWLING:
+            case ACT_CRAWLING:
+            case ACT_STOP_CRAWLING:
+            continue;
+        }
+
         Vec3f pos;
         Vec3f out;
         vec3f_copy(pos, m->marioObj->header.gfx.pos);
@@ -88,12 +100,8 @@ void nametags_render(void) {
                 np->palette.parts[CAP][2]
             };
             f32 measure = djui_hud_measure_text(name) * scale * 0.5f;
-            f32 alpha = m->action == ACT_START_CROUCHING ||
-                m->action == ACT_CROUCHING ||
-                m->action == ACT_STOP_CROUCHING ||
-                m->action == ACT_START_CRAWLING ||
-                m->action == ACT_CRAWLING ||
-                m->action == ACT_STOP_CRAWLING ? 100 : 255;
+
+            f32 alpha = (np->fadeOpacity / 32) * 255;
 
             struct StateExtras* e = &sStateExtras[i];
             djui_hud_print_outlined_text_interpolated(name, e->prevPos[0] - measure, e->prevPos[1], e->prevScale, out[0] - measure, out[1], scale, color[0], color[1], color[2], alpha, 0.25);