Fix in model loading; simple model viewer

- fixed model loading code
- added simple model viewer (model_test) in src/graphics/opengl/test
- added system time stamp code
- split the code in app/system modules to separate headers
- added debug messages in model loading
- minor fixes in OpenGL engine

2 files changed, 21 insertions, 0 deletions

diff --git a/src/math/point.h b/src/math/point.h
index d6768c8..80f80f4 100644
--- a/src/math/point.h
+++ b/src/math/point.h
@@ -24,6 +24,7 @@
 #include "func.h"
 
 #include <cmath>
+#include <sstream>
 
 
 // Math module namespace
@@ -147,6 +148,15 @@ struct Point
         return Point(left.x / right, left.y / right);
     }
 
+
+    //! Returns a string "[x, y]"
+    inline std::string ToString() const
+    {
+        std::stringstream s;
+        s.precision(3);
+        s << "[" << x << ", " << y << "]";
+        return s.str();
+    }
 }; // struct Point
 
 
diff --git a/src/math/vector.h b/src/math/vector.h
index 41f11a8..65fc2f9 100644
--- a/src/math/vector.h
+++ b/src/math/vector.h
@@ -24,6 +24,7 @@
 #include "func.h"
 
 #include <cmath>
+#include <sstream>
 
 
 // Math module namespace
@@ -202,6 +203,16 @@ struct Vector
         return Vector(left.x / right, left.y / right, left.z / right);
     }
 
+
+    //! Returns a string "[x, y, z]"
+    inline std::string ToString() const
+    {
+        std::stringstream s;
+        s.precision(3);
+        s << "[" << x << ", " << y << ", " << z << "]";
+        return s.str();
+    }
+
 }; // struct Point
 
 //! Checks if two vectors are equal within given \a tolerance