Issue-1169: fix [] operator of vector3.

include/assimp/vector3.h

@@ -125,6 +125,12 @@ public:
      *  @param o Second factor */
     const aiVector3t SymMul(const aiVector3t& o);
 
+	/*union vector3 { 
+		TReal values[3]; 
+		struct { 
+			TReal x, y, z; 
+		}; 
+	};*/
     TReal x, y, z;
 } PACK_STRUCT;
 
@@ -143,8 +149,6 @@ struct aiVector3D {
 
 #ifdef __cplusplus
 
-
-
 #endif // __cplusplus
 
 #endif // AI_VECTOR3D_H_INC

include/assimp/vector3.inl

@@ -141,12 +141,34 @@ AI_FORCE_INLINE aiVector3t<TReal>& aiVector3t<TReal>::operator *= (const aiMatri
 // ------------------------------------------------------------------------------------------------
 template <typename TReal>
 AI_FORCE_INLINE TReal aiVector3t<TReal>::operator[](unsigned int i) const {
-    return *(&x + i);
+//    return *(&x + i);
+    switch (i) {
+        case 0:
+            return x;
+        case 1:
+            return y;
+        case 2:
+            return z;
+        default:
+            break;
+    }
+    return x;
 }
 // ------------------------------------------------------------------------------------------------
 template <typename TReal>
 AI_FORCE_INLINE TReal& aiVector3t<TReal>::operator[](unsigned int i) {
-    return *(&x + i);
+//    return *(&x + i);
+    switch (i) {
+        case 0:
+            return x;
+        case 1:
+            return y;
+        case 2:
+            return z;
+        default:
+            break;
+    }
+    return x;
 }
 // ------------------------------------------------------------------------------------------------
 template <typename TReal>