Many enhancements in client API

* Fix issues in item use
* Stack animated texts values
* Add utility functions for changing creature color and jumping
* Add some new extended functionality
* Improve map shader API

src/framework/stdext/math.cpp

@@ -57,4 +57,9 @@ float random_range(float min, float max)
     return min + (max - min)*dis(gen);
 }
 
+double round(double r)
+{
+    return (r > 0.0) ? floor(r + 0.5) : ceil(r - 0.5);
+}
+
 }

src/framework/stdext/math.h

@@ -43,6 +43,8 @@ uint32_t adler32(const uint8_t *buffer, size_t size);
 long random_range(long min, long max);
 float random_range(float min, float max);
 
+double round(double r);
+
 }
 
 #endif