Difference between revisions of "String2Float"
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Rolig Loon (talk | contribs) |
(... why does this exist? It is faster and eaiser to just use (float)"float value") |
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'''Example:''' | '''Example:''' | ||
<lsl> | <lsl> | ||
float My_new_float = String2Float(40.23578); | float My_new_float = String2Float("40.23578"); | ||
// returns 40.235780 | // returns 40.235780 | ||
float My_new_float = String2Float(-683.3); | float My_new_float = String2Float("-683.3"); | ||
// returns -683.300000 | // returns -683.300000 | ||
float My_new_float = String2Float(9924); | float My_new_float = String2Float("9924"); | ||
// returns 9924.000000 | // returns 9924.000000 | ||
</lsl> | </lsl> | ||
Revision as of 22:21, 22 July 2012
| LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
Summary
Function: float String2Float( string str );Returns a float that will be signed if negative.
| • string | str | – | string to be typecast to a float |
The number str provided as a string may be negative and may or may not have a decimal point
Returns 0.000000 if the string contains non-numerical characters (other than a negative sign or a decimal point).
Example: <lsl> float My_new_float = String2Float("40.23578"); // returns 40.235780
float My_new_float = String2Float("-683.3"); // returns -683.300000
float My_new_float = String2Float("9924"); // returns 9924.000000 </lsl>
Specification
<lsl>float String2Float(string ST) {
list nums = ["0","1","2","3","4","5","6","7","8","9",".","-"];
float FinalNum = 0.0;
integer idx = llSubStringIndex(ST,".");
if (idx == -1)
{
idx = llStringLength(ST);
}
integer Sgn = 1;
integer j;
for (j=0;j< llStringLength(ST);j++)
{
string Char = llGetSubString(ST,j,j);
if (~llListFindList(nums,[Char]))
{
if((j==0) && (Char == "-"))
{
Sgn = -1;
}
else if (j < idx)
{
FinalNum = FinalNum + (float)Char * llPow(10.0,((idx-j)-1));
}
else if (j > idx)
{
FinalNum = FinalNum + (float)Char * llPow(10.0,((idx-j)));
}
}
}
return FinalNum * Sgn;
} </lsl>