Chams: material styles and viewmodel support

- Material selector 0..4: debugwhite, debug wireframe (ignorez), vgui
  white_additive, debugtranslucentsinglecolor, vgui/white; cached per index
  with a debugwhite fallback.
- Add "Viewmodel (hands/weapon)" toggle; viewmodel entities (class contains
  viewmodel or model path /v_...) get a normal-depth chams pass.
- [chams] gains viewmodel= and material=.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/esp.cpp b/src/esp.cpp
index b50dd87..1631df1 100644
--- a/src/esp.cpp
+++ b/src/esp.cpp
@@ -173,6 +173,20 @@ bool esp_is_npc_index(int idx) {
   return is_npc_class(entity_class_name(net, nullptr));
 }
 
+bool esp_is_viewmodel_index(int idx) {
+  if (!g_iface.entitylist || idx <= 0 || idx > 8192)
+    return false;
+  void *ent = entitylist_get(idx);
+  if (!ent)
+    return false;
+  void *net = entity_networkable(idx);
+  const char *cls = net ? entity_class_name(net, nullptr) : nullptr;
+  if (cls && strcasestr(cls, "viewmodel"))
+    return true;
+  const char *model = entity_model_name(ent);
+  return model && (strstr(model, "/v_") || strstr(model, "\\v_"));
+}
+
 static bool model_is_friendly(const char *m) {
   static const char *patterns[] = {
       "citizen", "humans/",  "male_",   "female_", "barney", "alyx",