Difference between revisions of "Cast Reference"
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→Examples: Cleaned up syntax a bit
imported>Jlundin |
imported>Rasikko m (→Examples: Cleaned up syntax a bit) |
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| True if the array is 1 element or longer in size | | True if the array is 1 element or longer in size | ||
|} | |} | ||
Notice that the compiler will auto-cast integers and floats to booleans, but not the other way around. This means that arithmetic involving booleans may not work as expected: | |||
<source lang="papyrus"> | |||
Bool b = True | |||
; f gets 1.0, not 0.9, because b won't auto-cast to 1; instead, (9.0 / 10.0) auto-casts to True, and True * b = True, and True as Float = 1.0 | |||
Float f = 9.0 / 10.0 * b | |||
; f gets 0.9 here because b is explicitly cast to an Int (1), which can then be auto-cast to a Float during the multiplication step | |||
Float f = 9.0 / 10.0 * (b as Int) | |||
</source> | |||
=== Examples === | === Examples === | ||
<source lang="papyrus"> | <source lang="papyrus"> | ||
; | ; b gets true | ||
Bool b = 1 as bool | |||
</source> | </source> | ||
<br> | <br> | ||
<source lang="papyrus"> | <source lang="papyrus"> | ||
; | ; b gets false | ||
Bool b = "" as bool | |||
</source> | </source> | ||
<br> | <br> | ||
<source lang="papyrus"> | <source lang="papyrus"> | ||
; | ; b gets true | ||
Bool b = new int[5] as bool | |||
</source> | </source> | ||
| Line 46: | Line 56: | ||
'''Compiler auto-cast from''': Nothing | '''Compiler auto-cast from''': Nothing | ||
Booleans, floats and strings can be cast to integers. True and False convert to 1 and 0 respectively, floating point values will be truncated, and strings will convert to their integer representation, if it has one (otherwise 0) | |||
=== Examples === | === Examples === | ||
<source lang="papyrus"> | |||
; x gets 1 | |||
x = True as int | |||
</source> | |||
<br> | |||
<source lang="papyrus"> | <source lang="papyrus"> | ||
; x gets 10 | ; x gets 10 | ||
x = 10.5 as int | x = 10.5 as int | ||
</source> | |||
<br> | |||
<source lang="papyrus"> | |||
; x gets -1 | |||
x = -1.9 as int | |||
</source> | </source> | ||
<br> | <br> | ||
| Line 62: | Line 82: | ||
'''Compiler auto-cast from''': Int | '''Compiler auto-cast from''': Int | ||
Booleans, integers and strings can be cast to floats. True and False convert to 1.0 and 0.0 respectively, integers will simply be their floating point equivalents, and strings will convert to their float representation, if it has one (otherwise 0.0) | |||
=== Examples === | === Examples === | ||
<source lang="papyrus"> | |||
; x gets 1.0 | |||
x = True as float | |||
</source> | |||
<br> | |||
<source lang="papyrus"> | <source lang="papyrus"> | ||
; x gets 15.0 | ; x gets 15.0 | ||
| Line 130: | Line 155: | ||
Nothing can be cast to an array, even other arrays if the base types would normally cast just fine. | Nothing can be cast to an array, even other arrays if the base types would normally cast just fine. | ||
== Cast to different types == | |||
Casting types to different ones might be useful i.e. if you want to know the type of the object triggered with your triggerzone. But, for example, you can't cast an ObjectReference to a Weapon or compare them. In this case you can work with the "Form"-type. | |||
=== Examples === | |||
<source lang="papyrus"> | |||
Weapon Property MyUberWeapon auto | |||
Event OnTriggerEnter(ObjectReference type) | |||
Weapon triggeredWeapon = (type as form) as weapon ; Cast the triggered object first to a form and then to a weapon. | |||
if(triggeredWeapon == MyUberWeapon) | |||
; if triggeredWeapon is equal to MyUberWeapon, do something. | |||
endif | |||
EndEvent | |||
</source> | |||
But if you only want to determine the type of the object, you could also use a keyword: | |||
<source lang="papyrus"> | |||
Keyword Property IsAnArrow auto | |||
Event OnTriggerEnter(ObjectReference Type) | |||
if(type.haskeyword(IsAnArrow)) | |||
; if the object type has our keyword, do something. | |||
endif | |||
EndEvent | |||
</source> | |||
[[Category:Scripting]] | [[Category:Scripting]] | ||
[[Category:Papyrus]] | [[Category:Papyrus]] | ||
[[Category:Papyrus Language Reference]] | [[Category:Papyrus Language Reference]] | ||