Clarify animated textures.

src/model/model.cpp

@@ -535,11 +535,7 @@ void block::loadPayload(const buffer &data)
         break;
     }
 
-    // unk
+    READ(data, atex);
-    // seen: 0,2,3,4,8,9,516
-    READ(data, unk7);
-    // seen: 0.0, 0.0222222, 0.0444444, 0.0555556, 0.03125, 0.0375, 0.0625, 0.1, 0.125, 100, inf
-    READ(data, unk9); // scale? probably no
     READ(data, unk10);
     READ(data, auto_animation);
     READ(data, animation_cycle);
@@ -594,7 +590,7 @@ void block::loadPayload(const buffer &data)
         read_more_faces();
     }
 
-    if (unk7 != 0)
+    if (atex.is_present())
         return;
 
     std::string s = "extraction error: block: " + std::string(h.name);

src/model/model.h

@@ -329,6 +329,28 @@ struct block
         aim_vector4 max;
     };
 
+    struct animated_texture
+    {
+        uint16_t zeros0;
+        uint8_t multiplier_of_number_of_gradations;
+        uint8_t number_of_gradations;
+        float time_of_full_cycle;
+
+        float get_actual_number_of_gradations() const
+        {
+            if (!multiplier_of_number_of_gradations)
+                return multiplier_of_number_of_gradations * number_of_gradations;
+            return number_of_gradations * number_of_gradations;
+        }
+
+        float get_actual_time_of_full_cycle() const
+        {
+            return get_actual_number_of_gradations() * time_of_full_cycle;
+        }
+
+        bool is_present() const { return number_of_gradations; }
+    };
+
     header h;
 
     // data
@@ -349,10 +371,9 @@ struct block
     // animations
     std::vector<animation> animations;
     std::vector<damage_model> damage_models;
+    animated_texture atex;
 
     // unk
-    uint32_t unk7;
-    float unk9;
     uint32_t unk10;
     float unk8;
     uint32_t unk11;