Difference between revisions of "Category:LSL Float"

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(Useful Snippets: I put the "1" at the wrong end! Also added a note)
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== Useful Snippets ==
 
== Useful Snippets ==
 
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<lsl>integer isValidFloat(string s) { return (float)("1" + s) != 0.0; }</lsl>
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The following is a useful way to validate a string that may be a float; it isn't 100% accurate (to do so is considerably more complex), however it will match all but the most extreme float values; so as long as you are using what are typical values in LSL (don't really go beyond 4 or 5 decimal places, or beyond the billions in values) then it is by far the most efficient method.
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<lsl>integer isValidFloat(string s) { return (float)(s + "1") != 0.0; }</lsl>
 
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== See Also ==
 
== See Also ==
 
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Revision as of 02:33, 22 October 2010

Floating point data types are 32 bit numbers in IEEE-754 form. If you want a decimal point in your number, then it is a float.

The Range is 1.175494351E-38 to 3.402823466E+38

They can be specified in scientific notation like 2.6E-5.

If a function requires a float as a parameter, and the number is an integer (e.g. 5), be sure to add a .0 so it is created as a float (e.g. 5.0)

If you are dividing 2 constants, be sure to define them as floats or your result may get rounded. Better yet, do the math on your calculator and save the server some cycles.

Examples

<lsl>float min = 1.175494351E-38; float max = 3.402823466E+38; float sci = 2.6E-5; float sci_a = 2.6E+3; float sci_b = 2.6E3; float sci_c = 26000.E-1; float f = 2600;//implicitly typecast to a float float E = 85.34859; </lsl>

Useful Snippets

The following is a useful way to validate a string that may be a float; it isn't 100% accurate (to do so is considerably more complex), however it will match all but the most extreme float values; so as long as you are using what are typical values in LSL (don't really go beyond 4 or 5 decimal places, or beyond the billions in values) then it is by far the most efficient method. <lsl>integer isValidFloat(string s) { return (float)(s + "1") != 0.0; }</lsl>

See Also

Articles

Subcategories

This category has only the following subcategory.

Pages in category "LSL Float"

The following 8 pages are in this category, out of 8 total.