Chams: material fallbacks and FindMaterial diagnostics

models/debug/debugwhite is not resident and FindMaterial did not return it.
Log each FindMaterial attempt and fall back to debugwhite2/3, vgui/white,
debug/debugtranslucentsinglecolor and the ignorez debug wireframe material so
chams can still render.

1 files changed, 31 insertions, 10 deletions

diff --git a/src/world.cpp b/src/world.cpp
index ab0c134..15a93ec 100644
--- a/src/world.cpp
+++ b/src/world.cpp
@@ -1020,6 +1020,13 @@ void *world_find_material(const char *name) {
   InvalidFn invalid = (InvalidFn)vfunc<InvalidFn>(ms, 75);
   GetFn get = (GetFn)vfunc<GetFn>(ms, 76);
   CountFn count = (CountFn)vfunc<CountFn>(ms, 77);
+  const char *candidates[] = {name,
+                              "models/debug/debugwhite2",
+                              "models/debug/debugwhite3",
+                              "vgui/white",
+                              "debug/debugtranslucentsinglecolor",
+                              "debug/debugwireframevertexcolorignorez",
+                              nullptr};
   int total = count ? count(ms) : 0;
   if (total > 0 && total < 200000) {
     unsigned short h = first(ms);
@@ -1029,20 +1036,34 @@ void *world_find_material(const char *name) {
       if (mat) {
         NameFn mat_name = (NameFn)vfunc<NameFn>(mat, 0);
         const char *n = mat_name(mat);
-        if (n && strcmp(n, name) == 0)
-          return mat;
+        if (n) {
+          for (int c = 0; candidates[c]; c++)
+            if (strcmp(n, candidates[c]) == 0)
+              return mat;
+        }
       }
       h = next(ms, h);
     }
   }
-  // Not resident yet: let the material system load it. FindMaterial is slot
-  // 71 (IsMaterialLoaded is 72, FirstMaterial 73).
+  // Not resident yet: let the material system load it.
   using FindFn = void *(*)(void *, const char *, const char *, bool,
                            const char *);
-  void *mat = vfunc<FindFn>(ms, 71)(ms, name, "Model textures", false, nullptr);
-  if (!mat)
-    return nullptr;
-  NameFn mat_name = (NameFn)vfunc<NameFn>(mat, 0);
-  const char *n = mat_name(mat);
-  return (n && strcmp(n, name) == 0) ? mat : nullptr;
+  static const char *groups[] = {"Model textures", "Other textures", nullptr};
+  for (int c = 0; candidates[c]; c++) {
+    for (int g = 0; groups[g]; g++) {
+      void *mat = vfunc<FindFn>(ms, 71)(ms, candidates[c], groups[g], false,
+                                        nullptr);
+      if (!mat) {
+        logf("chams: FindMaterial(%s, %s) -> null", candidates[c], groups[g]);
+        continue;
+      }
+      NameFn mat_name = (NameFn)vfunc<NameFn>(mat, 0);
+      const char *n = mat_name(mat);
+      logf("chams: FindMaterial(%s, %s) -> %p name=%s", candidates[c],
+           groups[g], mat, n ? n : "?");
+      if (n && strstr(n, "debugwhite"))
+        return mat;
+    }
+  }
+  return nullptr;
 }