World: add skybox changer

New Visuals -> Skybox card with a runtime sv_skyname override using the same
mechanism as the stock skybox_swapper entity. The choice list is the HL2
skybox set extracted from the game VPKs.

The map's own sky is captured from loaded materials (SkyBox group, parsing
skybox/<name>... face names) before the first override, so turning the
feature off or picking "Map default" restores it; a level change restores it
implicitly. Sky changes invalidate the world tint so new sky materials are
tinted as well.

GUI: add a CK_CHOICE control (value box with < / > zones).

1 files changed, 19 insertions, 2 deletions

diff --git a/src/menu.cpp b/src/menu.cpp
index 237502b..dfd973d 100644
--- a/src/menu.cpp
+++ b/src/menu.cpp
@@ -59,6 +59,8 @@ bool g_fog_disable = false;
 int g_fog_rgb[3] = {160, 170, 190};
 int g_fog_start = 200;
 int g_fog_end = 3000;
+FeatureState g_skybox{false, 0}; // sv_skyname override
+int g_skybox_choice = 0;         // 0 = map default
 bool g_item_health = true;
 bool g_item_ammo = true;
 bool g_item_armor = true;
@@ -212,6 +214,8 @@ void config_save() {
              "start=%d\nend=%d\nskybox=%d\ndisable=%d\n",
           g_fog.active, g_fog.bind, g_fog_rgb[0], g_fog_rgb[1], g_fog_rgb[2],
           g_fog_start, g_fog_end, (int)g_fog_skybox, (int)g_fog_disable);
+  fprintf(f, "[skybox]\nactive=%d\nbind=%d\nchoice=%d\n", g_skybox.active,
+          g_skybox.bind, g_skybox_choice);
   fprintf(f, "[items]\nactive=%d\nbind=%d\nhealth=%d\nammo=%d\n"
              "armor=%d\nweapons=%d\ncrates=%d\ndistance=%d\nmax_dist=%d\n",
           g_item_esp.active, g_item_esp.bind, (int)g_item_health,
@@ -246,7 +250,7 @@ static bool config_load() {
   FeatureState *cur = nullptr;
   bool in_esp = false, in_bhop = false, in_aim = false, in_silent = false,
        in_jumpbug = false, in_spread = false, in_items = false,
-       in_tint = false, in_fog = false;
+       in_tint = false, in_fog = false, in_skybox = false;
   while (fgets(line, sizeof(line), f)) {
     line[strcspn(line, "\r\n")] = 0;
     if (line[0] == '[') {
@@ -270,6 +274,8 @@ static bool config_load() {
         cur = &g_world_tint;
       else if (strstr(line, "[fog]"))
         cur = &g_fog;
+      else if (strstr(line, "[skybox]"))
+        cur = &g_skybox;
       else if (strstr(line, "[aimbot]"))
         cur = &g_aimbot;
       else if (strstr(line, "[triggerbot]"))
@@ -287,6 +293,7 @@ static bool config_load() {
       in_items = (cur == &g_item_esp);
       in_tint = (cur == &g_world_tint);
       in_fog = (cur == &g_fog);
+      in_skybox = (cur == &g_skybox);
     } else if (cur) {
       char *eq = strchr(line, '=');
       if (!eq)
@@ -407,6 +414,12 @@ static bool config_load() {
           g_fog_disable = atoi(val) != 0;
         }
       }
+      if (in_skybox && strcmp(key, "choice") == 0) {
+        int v = atoi(val);
+        if (v < 0) v = 0;
+        if (v >= skybox_option_count()) v = 0;
+        g_skybox_choice = v;
+      }
       if (in_esp) {
         if (strcmp(key, "neutral") == 0)
           g_esp_opt[ESP_OPT_SHOW_NEUTRAL] = atoi(val) != 0;
@@ -475,6 +488,8 @@ void config_reset_defaults() {
   g_fog_rgb[2] = 190;
   g_fog_start = 200;
   g_fog_end = 3000;
+  g_skybox = {false, 0};
+  g_skybox_choice = 0;
   g_item_health = true;
   g_item_ammo = true;
   g_item_armor = true;
@@ -592,7 +607,7 @@ static FeatureState *feature_state(int feature) {
   static FeatureState *feats[FEAT_COUNT] = {
       &g_bhop,    &g_abh,        &g_esp,        &g_aimbot, &g_triggerbot,
       &g_silentaim, &g_jumpbug,  &g_melee,      &g_spread, &g_item_esp,
-      &g_fullbright, &g_world_tint, &g_fog};
+      &g_fullbright, &g_world_tint, &g_fog, &g_skybox};
   if (feature < 0 || feature >= FEAT_COUNT)
     return nullptr;
   return feats[feature];
@@ -800,6 +815,7 @@ void outer_draw() {
   fullbright_update();
   world_tint_update();
   fog_update();
+  skybox_update();
   gui_handle_input();
   // HL2H_DRAW_TEST=1 draws a probe rect without needing the GUI open
   static bool draw_test = getenv("HL2H_DRAW_TEST") != nullptr;
@@ -822,6 +838,7 @@ void outer_draw() {
       font_reset = true;
       world_tint_invalidate();
       fog_invalidate();
+      skybox_invalidate();
     }
   }
   if (font_reset && g_font) {