Redesign of animation queue for unreal, add get_tangibles_near to drivenengine

luprex/cpp/core/streambuffer.hpp

@@ -313,6 +313,8 @@ public:
     void write_char(char c);
     void write_float(float f);
     void write_double(double d);
+    void write_xyz(const util::XYZ &xyz);
+    void write_dxyz(const util::DXYZ &xyz);
 
     // Read fixed-size integers from the buffer.
     //
@@ -329,7 +331,9 @@ public:
     char read_char();
     float read_float();
     double read_double();
-
+    util::XYZ read_xyz();
+    util::DXYZ read_dxyz();
+    
     // Write other types into the buffer.
     //
     // Note that strings are preceded by a length field.  Reading