Transitions: per-trigger targets and 3D wireframe; FOV range fixes

- Each changelevel trigger now shows its own target map. The trigger whose
  target is the map we came from is marked "<- map"; the forward one is
  "-> map". No more appending one global previous-map line to every box.
- Draw the volume as a projected 8-corner / 12-edge wireframe with the tag
  above its highest visible corner instead of a screen-space rectangle.
- Camera FOV is 40..140 (stock 75) and viewmodel FOV 20..120 (stock 54); 0 is
  no longer allowed and old configs using 0 migrate to the stock value.
- Log the mat_monitorgamma readback via ICvar so we can tell whether the
  command is rejected or the OS/compositor ignores the gamma ramp.

1 files changed, 16 insertions, 15 deletions

diff --git a/src/hl2h.cpp b/src/hl2h.cpp
index 74a8c6c..f7106cd 100644
--- a/src/hl2h.cpp
+++ b/src/hl2h.cpp
@@ -664,25 +664,14 @@ static void install_uniform_random_hook() {
 // and monitor gamma are plain client cvars.
 
 static void view_settings_apply(void *ent) {
-  if (g_net.default_fov >= 0 && ent) {
-    static int last = -2;
-    int want = g_fov_camera > 0 ? g_fov_camera : 0;
-    if (want != last || g_fov_camera > 0) {
-      *(int *)((uintptr_t)ent + g_net.default_fov) = want;
-      last = want;
-    }
-  }
-  // 0 means "leave the game's value alone": only send a command once the
-  // slider is non-zero, then restore the stock value when it returns to 0.
-  static int last_vm = 0;
-  if (g_fov_viewmodel > 0 && g_fov_viewmodel != last_vm) {
+  if (g_net.default_fov >= 0 && ent)
+    *(int *)((uintptr_t)ent + g_net.default_fov) = g_fov_camera;
+  static int last_vm = 54;
+  if (g_fov_viewmodel != last_vm) {
     char cmd[48];
     snprintf(cmd, sizeof(cmd), "viewmodel_fov %d", g_fov_viewmodel);
     console_cmd(cmd);
     last_vm = g_fov_viewmodel;
-  } else if (g_fov_viewmodel == 0 && last_vm > 0) {
-    console_cmd("viewmodel_fov 54");
-    last_vm = 0;
   }
   static int last_gamma = 22;
   if (g_gamma != last_gamma) {
@@ -690,6 +679,18 @@ static void view_settings_apply(void *ent) {
     snprintf(cmd, sizeof(cmd), "mat_monitorgamma %d.%d", g_gamma / 10,
              g_gamma % 10);
     console_cmd(cmd);
+    // Read back through ICvar to tell an ignored command from an OS gamma
+    // ramp that the compositor discards.
+    float got = -1.0f;
+    if (g_iface.cvar) {
+      using FindFn = void *(*)(void *, const char *);
+      void *v = vfunc<FindFn>(g_iface.cvar, 12)(g_iface.cvar,
+                                                "mat_monitorgamma");
+      if (v)
+        got = *(float *)((uintptr_t)v + 0x2c); // ConVar m_Value.f
+    }
+    logf("view: gamma request %d.%d, cvar reports %.2f", g_gamma / 10,
+         g_gamma % 10, got);
     last_gamma = g_gamma;
   }
 }