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=.

6 files changed, 89 insertions, 30 deletions

diff --git a/CONTEXT.md b/CONTEXT.md
index 60a5a91..c95095b 100644
--- a/CONTEXT.md
+++ b/CONTEXT.md
@@ -293,12 +293,17 @@ vocabulary / decisions.
   materials ignore ColorModulate. The shared material's flag and colour are
   restored to (false, white) after the draw.
 - Material lookup walks the `IMaterialSystem` list (`world_find_material`), with
-  `FindMaterial` (slot 71) as the fallback. Candidates, in order:
-  `models/debug/debugwhite{2,3}`, `vgui/white`,
-  `debug/debugtranslucentsinglecolor`, `debug/debugwireframevertexcolorignorez`.
-  The chosen material name is logged.
-- Feature is off by default; `[chams] active/bind/walls/r/g/b`, with a
-  "Through walls" toggle and colour picker in the Visuals card.
+  `FindMaterial` (slot 71) as the fallback. The style index selects:
+  0 `models/debug/debugwhite`, 1 `debug/debugwireframevertexcolorignorez`,
+  2 `vgui/white_additive`, 3 `debug/debugtranslucentsinglecolor`,
+  4 `vgui/white`; if the requested style is unavailable it falls back to the
+  first available debugwhite candidate. The chosen material name is logged.
+- `Viewmodel (hands/weapon)` also applies the override to entities whose class
+  contains `viewmodel` or whose model path is `.../v_...`. The viewmodel gets
+  only the normal-depth pass (no ignorez).
+- Feature is off by default; `[chams] active/bind/walls/viewmodel/material/r/g/b`,
+  with Through walls, Viewmodel, Material (0..4) and colour in the Visuals
+  card.
 - This is a flat material override, not stencil outlines; depth handling is
   the simple ignorez/normal two-pass.
 
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",
diff --git a/src/gui.cpp b/src/gui.cpp
index a38f537..4a949f0 100644
--- a/src/gui.cpp
+++ b/src/gui.cpp
@@ -428,6 +428,12 @@ static void build_cards() {
   add_toggle(chams, "Through walls",
              "Draw a second pass with the depth test disabled.",
              &g_chams_walls);
+  add_toggle(chams, "Viewmodel (hands/weapon)",
+             "Apply chams to the first-person hands and weapon too.",
+             &g_chams_viewmodel);
+  add_slider(chams, "Material",
+             "0 Flat, 1 Wireframe, 2 Additive glow, 3 Solid, 4 White.", 0, 4,
+             &g_chams_mat_index);
   add_color(chams, "Colour", "Chams colour.", g_chams_rgb);
 
   int view = add_card(2, nullptr, "Camera / display",
diff --git a/src/hl2h.h b/src/hl2h.h
index 55fac0d..1be1bb1 100644
--- a/src/hl2h.h
+++ b/src/hl2h.h
@@ -231,6 +231,8 @@ extern FeatureState g_bhop, g_abh, g_jumpbug, g_melee, g_spread, g_esp,
     g_world_tint, g_fog, g_skybox, g_projectiles, g_chams;
 extern bool g_proj_fuse, g_proj_radius;
 extern bool g_chams_walls;
+extern bool g_chams_viewmodel;
+extern int g_chams_mat_index;
 extern int g_chams_rgb[3];
 extern bool g_tint_world_on, g_tint_sky_on, g_tint_prop_on;
 extern int g_tint_world_rgb[3], g_tint_sky_rgb[3], g_tint_prop_rgb[3];
@@ -334,6 +336,7 @@ void aimbot_reset_lock();
 void silentaim_reset_lock();
 void *entitylist_get(int idx);
 bool esp_is_npc_index(int idx);
+bool esp_is_viewmodel_index(int idx);
 void *world_find_material(const char *name);
 void chams_init();
 int engine_get_local_player();
diff --git a/src/menu.cpp b/src/menu.cpp
index 77eb35f..4f22d39 100644
--- a/src/menu.cpp
+++ b/src/menu.cpp
@@ -65,6 +65,8 @@ bool g_proj_fuse = true;
 bool g_proj_radius = true;
 FeatureState g_chams{false, 0}; // flat model material, optional through walls
 bool g_chams_walls = true;
+bool g_chams_viewmodel = false;
+int g_chams_mat_index = 0;
 int g_chams_rgb[3] = {255, 60, 60};
 bool g_item_health = true;
 bool g_item_ammo = true;
@@ -237,8 +239,10 @@ void config_save() {
   fprintf(f, "[projectiles]\nactive=%d\nbind=%d\nfuse=%d\nradius=%d\n",
           g_projectiles.active, g_projectiles.bind, (int)g_proj_fuse,
           (int)g_proj_radius);
-  fprintf(f, "[chams]\nactive=%d\nbind=%d\nwalls=%d\nr=%d\ng=%d\nb=%d\n",
-          g_chams.active, g_chams.bind, (int)g_chams_walls, g_chams_rgb[0],
+  fprintf(f, "[chams]\nactive=%d\nbind=%d\nwalls=%d\nviewmodel=%d\n"
+             "material=%d\nr=%d\ng=%d\nb=%d\n",
+          g_chams.active, g_chams.bind, (int)g_chams_walls,
+          (int)g_chams_viewmodel, g_chams_mat_index, g_chams_rgb[0],
           g_chams_rgb[1], g_chams_rgb[2]);
   fprintf(f, "[items]\nactive=%d\nbind=%d\nhealth=%d\nammo=%d\n"
              "armor=%d\nweapons=%d\ncrates=%d\ndistance=%d\nmax_dist=%d\n"
@@ -393,8 +397,15 @@ static bool config_load() {
       if (in_chams) {
         if (strcmp(key, "walls") == 0)
           g_chams_walls = atoi(val) != 0;
-        else if (strcmp(key, "r") == 0 || strcmp(key, "g") == 0 ||
-                 strcmp(key, "b") == 0) {
+        else if (strcmp(key, "viewmodel") == 0)
+          g_chams_viewmodel = atoi(val) != 0;
+        else if (strcmp(key, "material") == 0) {
+          int v = atoi(val);
+          if (v < 0) v = 0;
+          if (v > 4) v = 4;
+          g_chams_mat_index = v;
+        } else if (strcmp(key, "r") == 0 || strcmp(key, "g") == 0 ||
+                   strcmp(key, "b") == 0) {
           int v = atoi(val);
           if (v < 0) v = 0;
           if (v > 255) v = 255;
@@ -627,6 +638,8 @@ void config_reset_defaults() {
   g_proj_radius = true;
   g_chams = {false, 0};
   g_chams_walls = true;
+  g_chams_viewmodel = false;
+  g_chams_mat_index = 0;
   g_chams_rgb[0] = 255;
   g_chams_rgb[1] = 60;
   g_chams_rgb[2] = 60;
diff --git a/src/studio.cpp b/src/studio.cpp
index a1aae12..e667c4b 100644
--- a/src/studio.cpp
+++ b/src/studio.cpp
@@ -197,15 +197,29 @@ void *g_modelrender = nullptr;
 ModelExecFn g_orig_model_exec = nullptr;
 ForceOverrideFn g_force_override = nullptr;
 void *g_chams_mat = nullptr;
-bool g_chams_mat_tried = false;
+int g_chams_mat_idx = -1;
+
+const char *chams_material_name(int idx) {
+  switch (idx) {
+  case 1: return "debug/debugwireframevertexcolorignorez";
+  case 2: return "vgui/white_additive";
+  case 3: return "debug/debugtranslucentsinglecolor";
+  case 4: return "vgui/white";
+  default: return "models/debug/debugwhite";
+  }
+}
 
 void *chams_material() {
-  if (g_chams_mat_tried)
+  int idx = g_chams_mat_index;
+  if (idx < 0) idx = 0;
+  if (idx > 4) idx = 4;
+  if (g_chams_mat && g_chams_mat_idx == idx)
     return g_chams_mat;
-  g_chams_mat_tried = true;
-  g_chams_mat = world_find_material("models/debug/debugwhite");
+  g_chams_mat = world_find_material(chams_material_name(idx));
   if (!g_chams_mat)
-    logf("chams: no usable material");
+    g_chams_mat = world_find_material("models/debug/debugwhite");
+  g_chams_mat_idx = idx;
+  logf("chams: style %d -> %p", idx, g_chams_mat);
   return g_chams_mat;
 }
 
@@ -239,23 +253,27 @@ void hkdModelExecute(void *self, const void *state, const void *info,
   if (feature_active(FEAT_CHAMS) && info && g_force_override) {
     // ModelRenderInfo_t::entity_index is at 0x30 on 32-bit.
     int idx = *(const int *)((const char *)info + 0x30);
-    if (idx > 0 && idx <= 8192 && esp_is_npc_index(idx)) {
-      void *mat = chams_material();
-      if (mat) {
-        if (g_chams_walls) {
-          chams_apply(mat, true);
-          g_force_override(self, mat, 0 /* OVERRIDE_NORMAL */);
+    if (idx > 0 && idx <= 8192) {
+      bool is_npc = esp_is_npc_index(idx);
+      bool is_vm = g_chams_viewmodel && esp_is_viewmodel_index(idx);
+      if (is_npc || is_vm) {
+        void *mat = chams_material();
+        if (mat) {
+          if (g_chams_walls && !is_vm) {
+            chams_apply(mat, true);
+            g_force_override(self, mat, 0 /* OVERRIDE_NORMAL */);
+            g_orig_model_exec(self, state, info, bone);
+          }
+          chams_apply(mat, false);
+          g_force_override(self, mat, 0);
           g_orig_model_exec(self, state, info, bone);
+          g_force_override(self, nullptr, 0);
+          // debugwhite is shared: restore colour and depth behaviour.
+          using FlagFn = void (*)(void *, int, bool);
+          vfunc<FlagFn>(mat, 29)(mat, 1 << 15, false);
+          chams_color(mat, 1.0f, 1.0f, 1.0f);
+          return;
         }
-        chams_apply(mat, false);
-        g_force_override(self, mat, 0);
-        g_orig_model_exec(self, state, info, bone);
-        g_force_override(self, nullptr, 0);
-        // debugwhite is shared: restore colour and depth behaviour.
-        using FlagFn = void (*)(void *, int, bool);
-        vfunc<FlagFn>(mat, 29)(mat, 1 << 15, false);
-        chams_color(mat, 1.0f, 1.0f, 1.0f);
-        return;
       }
     }
   }