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

1 files changed, 21 insertions, 0 deletions

diff --git a/src/graphics/common/color.h b/src/graphics/common/color.h
index 3b19cf2..68421c7 100644
--- a/src/graphics/common/color.h
+++ b/src/graphics/common/color.h
@@ -19,6 +19,9 @@
 #pragma once
 
 
+#include <sstream>
+
+
 namespace Gfx {
 
 /**
@@ -38,6 +41,15 @@ struct Color
     {
         return (float*)this;
     }
+
+    //! Returns a string (r, g, b, a)
+    inline std::string ToString() const
+    {
+        std::stringstream s;
+        s.precision(3);
+        s << "(" << r << ", " << g << ", " << b << ", " << a << ")";
+        return s.str();
+    }
 };
 
 /**
@@ -49,6 +61,15 @@ struct ColorHSV
 
     ColorHSV(float aH = 0.0f, float aS = 0.0f, float aV = 0.0f)
      : h(aH), s(aS), v(aV) {}
+
+     //! Returns a string "(h, s, v)"
+     inline std::string ToString() const
+     {
+        std::stringstream s;
+        s.precision(3);
+        s << "(" << h << ", " << s << ", " << v << ")";
+        return s.str();
+     }
 };
 
 //! Converts a RGB color to HSV color