diff --git a/etk/UString.cpp b/etk/UString.cpp
index faaf7e6..0046a6d 100644
--- a/etk/UString.cpp
+++ b/etk/UString.cpp
@@ -662,6 +662,7 @@ bool etk::UString::ToBool(void) const
 	}
 	return false;
 }
+
 int64_t etk::UString::ToInt64(void) const
 {
 	int64_t ret=0;
@@ -688,6 +689,28 @@ int64_t etk::UString::ToInt64(void) const
 	return ret;
 }
 
+uint64_t etk::UString::ToUInt64(void) const
+{
+	uint64_t ret=0;
+	for (int32_t iii=0; iii<m_data.Size(); iii++) {
+		if(    iii==0
+		    && (    m_data[iii] == '-'
+		         || m_data[iii] == '+') ) {
+			if(m_data[iii] == '-') {
+				return 0;
+			}
+		} else {
+			if (m_data[iii]>='0' && m_data[iii]<='9') {
+				int32_t val = m_data[iii] - '0';
+				ret = ret*10 + val;
+			} else {
+				break;
+			}
+		}
+	}
+	return ret;
+}
+
 int32_t etk::UString::ToInt32(void) const
 {
 	int64_t parse = ToInt64();
@@ -704,6 +727,22 @@ int8_t etk::UString::ToInt8(void) const
 	return etk_avg((int64_t)INT8_MIN, parse, (int64_t)INT8_MAX);
 }
 
+uint32_t etk::UString::ToUInt32(void) const
+{
+	uint64_t parse = ToUInt64();
+	return etk_avg((int64_t)0, parse, (int64_t)UINT32_MAX);
+}
+uint16_t etk::UString::ToUInt16(void) const
+{
+	uint64_t parse = ToUInt64();
+	return etk_avg((int64_t)0, parse, (int64_t)UINT16_MAX);
+}
+uint8_t etk::UString::ToUInt8(void) const
+{
+	uint64_t parse = ToUInt64();
+	return etk_avg((int64_t)0, parse, (int64_t)UINT8_MAX);
+}
+
 double etk::UString::ToDouble(void) const
 {
 	double ret=0;
diff --git a/etk/UString.h b/etk/UString.h
index e232b2d..2761a14 100644
--- a/etk/UString.h
+++ b/etk/UString.h
@@ -148,6 +148,26 @@ namespace etk
 			 * @return the requested int
 			 */
 			int8_t ToInt8(void) const;
+			/**
+			 * @brief Transform the current string in an uint64_t
+			 * @return the requested int
+			 */
+			uint64_t ToUInt64(void) const;
+			/**
+			 * @brief Transform the current string in an uint32_t (if the number is higher, then it is limited at the uint32_t max)
+			 * @return the requested int
+			 */
+			uint32_t ToUInt32(void) const;
+			/**
+			 * @brief Transform the current string in an uint16_t (if the number is higher, then it is limited at the uint16_t max)
+			 * @return the requested int
+			 */
+			uint16_t ToUInt16(void) const;
+			/**
+			 * @brief Transform the current string in an uint8_t (if the number is higher, then it is limited at the uint8_t max)
+			 * @return the requested int
+			 */
+			uint8_t ToUInt8(void) const;
 			/**
 			 * @brief Transform the current string in a double
 			 * @return the requested double
diff --git a/etk/math/Vector2D.cpp b/etk/math/Vector2D.cpp
index bfabfe0..239dbe5 100644
--- a/etk/math/Vector2D.cpp
+++ b/etk/math/Vector2D.cpp
@@ -66,95 +66,26 @@ namespace etk
 	{
 		m_floats[0] = false;
 		m_floats[1] = false;
+		// copy to permit to modify it :
+		etk::UString tmpStr = _str;
 		if (_str.StartWith("(")) {
-			if (_str.StartWith("(t")) {
-				if (_str.CompareNoCase("(true,true)")) {
-					m_floats[0] = true;
-					m_floats[1] = true;
-				} else if (_str.CompareNoCase("(true,false)")) {
-					m_floats[0] = true;
-					m_floats[1] = false;
-				} else if (_str.CompareNoCase("(true)")) {
-					m_floats[0] = true;
-					m_floats[1] = true;
-				}
-			} else if (_str.StartWith("(f")) {
-				if (_str.CompareNoCase("(false,true)")) {
-					m_floats[0] = false;
-					m_floats[1] = true;
-				} else if (_str.CompareNoCase("(false,false)")) {
-					m_floats[0] = false;
-					m_floats[1] = false;
-				} else if (_str.CompareNoCase("(false)")) {
-					m_floats[0] = false;
-					m_floats[1] = false;
-				}
-			} else {
-				if (_str.CompareNoCase("(1,1)")) {
-					m_floats[0] = true;
-					m_floats[1] = true;
-				} else if (_str.CompareNoCase("(1)")) {
-					m_floats[0] = true;
-					m_floats[1] = true;
-				} else if (_str.CompareNoCase("(1,0)")) {
-					m_floats[0] = true;
-					m_floats[1] = false;
-				} else if (_str.CompareNoCase("(0,1)")) {
-					m_floats[0] = false;
-					m_floats[1] = true;
-				} else if (_str.CompareNoCase("(0,0)")) {
-					m_floats[0] = false;
-					m_floats[1] = false;
-				} else if (_str.CompareNoCase("(0)")) {
-					m_floats[0] = false;
-					m_floats[1] = false;
-				}
-			}
-		} else {
-			if (_str.StartWith("t")) {
-				if (_str.CompareNoCase("true,true")) {
-					m_floats[0] = true;
-					m_floats[1] = true;
-				} else if (_str.CompareNoCase("true,false")) {
-					m_floats[0] = true;
-					m_floats[1] = false;
-				} else if (_str.CompareNoCase("true")) {
-					m_floats[0] = true;
-					m_floats[1] = true;
-				}
-			} else if (_str.StartWith("f")) {
-				if (_str.CompareNoCase("false,true")) {
-					m_floats[0] = false;
-					m_floats[1] = true;
-				} else if (_str.CompareNoCase("false,false")) {
-					m_floats[0] = false;
-					m_floats[1] = false;
-				} else if (_str.CompareNoCase("false")) {
-					m_floats[0] = false;
-					m_floats[1] = false;
-				}
-			} else {
-				if (_str.CompareNoCase("1,1")) {
-					m_floats[0] = true;
-					m_floats[1] = true;
-				} else if (_str.CompareNoCase("1")) {
-					m_floats[0] = true;
-					m_floats[1] = true;
-				} else if (_str.CompareNoCase("1,0")) {
-					m_floats[0] = true;
-					m_floats[1] = false;
-				} else if (_str.CompareNoCase("0,1")) {
-					m_floats[0] = false;
-					m_floats[1] = true;
-				} else if (_str.CompareNoCase("0,0")) {
-					m_floats[0] = false;
-					m_floats[1] = false;
-				} else if (_str.CompareNoCase("0")) {
-					m_floats[0] = false;
-					m_floats[1] = false;
-				}
-			}
+			tmpStr.Remove(0,1);
 		}
+		if (tmpStr.EndWith(")")) {
+			tmpStr.Remove(tmpStr.Size()-1,1);
+		}
+		int32_t posComa = tmpStr.FindForward(',');
+		if (posComa <= 0) {
+			// no coma ...
+			// in every case, we parse the first element :
+			m_floats[0] = tmpStr.ToBool();
+			m_floats[1] = m_floats[0];
+		} else {
+			m_floats[0] = tmpStr.Extract(0,posComa).ToBool();
+			tmpStr.Remove(0,posComa+1);
+			m_floats[1] = tmpStr.ToBool();
+		}
+		TK_VERBOSE("Parse : \"" << _str << "\" ==> " << *this);
 	}
 	
 	template<> Vector2D<int32_t>::operator etk::UString(void) const
@@ -172,19 +103,27 @@ namespace etk
 	{
 		m_floats[0] = 0;
 		m_floats[1] = 0;
+		// copy to permit to modify it :
+		etk::UString tmpStr = _str;
 		if (_str.StartWith("(")) {
-			int32_t val1=0;
-			int32_t val2=0;
-			sscanf(_str.c_str(), "(%d,%d)", &val1, &val2);
-			m_floats[0] = val1;
-			m_floats[1] = val2;
-		} else {
-			int32_t val1=0;
-			int32_t val2=0;
-			sscanf(_str.c_str(), "%d,%d", &val1, &val2);
-			m_floats[0] = val1;
-			m_floats[1] = val2;
+			tmpStr.Remove(0,1);
 		}
+		if (tmpStr.EndWith(")")) {
+			tmpStr.Remove(tmpStr.Size()-1,1);
+		}
+		
+		int32_t posComa = tmpStr.FindForward(',');
+		if (posComa <= 0) {
+			// no coma ...
+			// in every case, we parse the first element :
+			m_floats[0] = tmpStr.ToInt32();
+			m_floats[1] = m_floats[0];
+		} else {
+			m_floats[0] = tmpStr.Extract(0,posComa).ToInt32();
+			tmpStr.Remove(0,posComa+1);
+			m_floats[1] = tmpStr.ToInt32();
+		}
+		TK_VERBOSE("Parse : \"" << _str << "\" ==> " << *this);
 	}
 	
 	template<> Vector2D<uint32_t>::operator etk::UString(void) const
@@ -202,19 +141,26 @@ namespace etk
 	{
 		m_floats[0] = 0;
 		m_floats[1] = 0;
+		// copy to permit to modify it :
+		etk::UString tmpStr = _str;
 		if (_str.StartWith("(")) {
-			int32_t val1=0;
-			int32_t val2=0;
-			sscanf(_str.c_str(), "(%d,%d)", &val1, &val2);
-			m_floats[0] = etk_max(0,val1);
-			m_floats[1] = etk_max(0,val2);
-		} else {
-			int32_t val1=0;
-			int32_t val2=0;
-			sscanf(_str.c_str(), "%d,%d", &val1, &val2);
-			m_floats[0] = etk_max(0,val1);
-			m_floats[1] = etk_max(0,val2);
+			tmpStr.Remove(0,1);
 		}
+		if (tmpStr.EndWith(")")) {
+			tmpStr.Remove(tmpStr.Size()-1,1);
+		}
+		int32_t posComa = tmpStr.FindForward(',');
+		if (posComa <= 0) {
+			// no coma ...
+			// in every case, we parse the first element :
+			m_floats[0] = tmpStr.ToUInt32();
+			m_floats[1] = m_floats[0];
+		} else {
+			m_floats[0] = tmpStr.Extract(0,posComa).ToUInt32();
+			tmpStr.Remove(0,posComa+1);
+			m_floats[1] = tmpStr.ToUInt32();
+		}
+		TK_VERBOSE("Parse : \"" << _str << "\" ==> " << *this);
 	}
 	
 	template<> Vector2D<float>::operator etk::UString(void) const
@@ -232,14 +178,26 @@ namespace etk
 	{
 		m_floats[0] = 0;
 		m_floats[1] = 0;
-		//TK_DEBUG("start parsing od vec2 with \"" << str << "\"");
+		// copy to permit to modify it :
+		etk::UString tmpStr = _str;
 		if (_str.StartWith("(")) {
-			//TK_DEBUG("    start with (");
-			sscanf(_str.c_str(), "(%f,%f)", &m_floats[0], &m_floats[1]);
-		} else {
-			sscanf(_str.c_str(), "%f,%f", &m_floats[0], &m_floats[1]);
+			tmpStr.Remove(0,1);
 		}
-		//TK_DEBUG("    result " << *this);
+		if (tmpStr.EndWith(")")) {
+			tmpStr.Remove(tmpStr.Size()-1,1);
+		}
+		int32_t posComa = tmpStr.FindForward(',');
+		if (posComa <= 0) {
+			// no coma ...
+			// in every case, we parse the first element :
+			m_floats[0] = tmpStr.ToFloat();
+			m_floats[1] = m_floats[0];
+		} else {
+			m_floats[0] = tmpStr.Extract(0,posComa).ToFloat();
+			tmpStr.Remove(0,posComa+1);
+			m_floats[1] = tmpStr.ToFloat();
+		}
+		TK_VERBOSE("Parse : \"" << _str << "\" ==> " << *this);
 	}
 
 };