Chams: model-safe styles and a dedicated viewmodel material

VGUI/white materials do not draw skinned models, so every viewmodel style
except the model debug one made the hands/weapon disappear. Use model debug
materials for all styles: wireframe, additive vertex colour, translucent
single colour, translucent vertex colour, MRM fullbright. The viewmodel
always uses debug/debugtranslucentsinglecolor. A missing style now falls back
to that material instead of vgui/white.

1 files changed, 16 insertions, 6 deletions

diff --git a/src/studio.cpp b/src/studio.cpp
index e667c4b..f67936c 100644
--- a/src/studio.cpp
+++ b/src/studio.cpp
@@ -201,10 +201,11 @@ 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 1: return "debug/debugwireframe";
+  case 2: return "debug/additivevertexcolorvertexalpha";
   case 3: return "debug/debugtranslucentsinglecolor";
-  case 4: return "vgui/white";
+  case 4: return "debug/debugtranslucentvertexcolor";
+  case 5: return "debug/debugmrmfullbright2";
   default: return "models/debug/debugwhite";
   }
 }
@@ -212,17 +213,26 @@ const char *chams_material_name(int idx) {
 void *chams_material() {
   int idx = g_chams_mat_index;
   if (idx < 0) idx = 0;
-  if (idx > 4) idx = 4;
+  if (idx > 5) idx = 5;
   if (g_chams_mat && g_chams_mat_idx == idx)
     return g_chams_mat;
   g_chams_mat = world_find_material(chams_material_name(idx));
   if (!g_chams_mat)
-    g_chams_mat = world_find_material("models/debug/debugwhite");
+    g_chams_mat = world_find_material("debug/debugtranslucentsinglecolor");
   g_chams_mat_idx = idx;
   logf("chams: style %d -> %p", idx, g_chams_mat);
   return g_chams_mat;
 }
 
+// Viewmodels need a model shader; the VGUI white materials used by some
+// styles do not draw skinned models and make the hands/weapon disappear.
+void *viewmodel_material() {
+  static void *mat = nullptr;
+  if (!mat)
+    mat = world_find_material("debug/debugtranslucentsinglecolor");
+  return mat;
+}
+
 void chams_color(void *mat, float r, float g, float b) {
   using ColorFn = void (*)(void *, float, float, float);
   using FindVarFn = void *(*)(void *, const char *, bool *, bool);
@@ -257,7 +267,7 @@ void hkdModelExecute(void *self, const void *state, const void *info,
       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();
+        void *mat = is_vm ? viewmodel_material() : chams_material();
         if (mat) {
           if (g_chams_walls && !is_vm) {
             chams_apply(mat, true);