set
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set [2013/12/17 20:03] l created |
set [2014/07/15 23:11] l [Setter operators] |
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| (Joe Dever, //Flight from the Dark//) | (Joe Dever, //Flight from the Dark//) | ||
| - | You can keep track of the number of meals that the protagonist carries with the ''<<[[set]]>>'' macro, like so: | + | You can keep track of the number of meals that the protagonist carries with the [[<<set>>]] macro, like so: |
| <code> | <code> | ||
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| ====Setter operators ==== | ====Setter operators ==== | ||
| - | The ''to'' and ''-='' are special operators called a **setter operator** - while [[expression]]s may contain comparison operators like ''+'' or ''not'', setter operators are commands to modify the values of variables. The ''-='' operator lowers the variable on the left by the value on the right. There is also a ''+='' operator that does the opposite. | + | The ''to'' and ''-='' are special operators called **setter operators** - while [[expression]]s may contain comparison operators like ''+'' or ''not'', setter operators are commands to modify the values of variables. The ''-='' operator lowers the variable on the left by the value on the right. There is also a ''+='' operator that does the opposite. |
| - | + | ||
| - | ====Setter operators==== | + | |
| The most useful setter operators are as follows: | The most useful setter operators are as follows: | ||
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| | *= | Multiplies the variable on the left by the number on the right. ''$var *= 2'' is shorthand for ''$var to $var * 2'' | ''$shields *= 2'' | | | *= | Multiplies the variable on the left by the number on the right. ''$var *= 2'' is shorthand for ''$var to $var * 2'' | ''$shields *= 2'' | | ||
| | /= | Divides the variable on the left by the number on the right. ''$var /= 2'' is shorthand for ''$var to $var / 2'' | ''$coins /= 2'' | | | /= | Divides the variable on the left by the number on the right. ''$var /= 2'' is shorthand for ''$var to $var / 2'' | ''$coins /= 2'' | | ||
| + | |||
| + | ====Multiple operations in one <<set>> ==== | ||
| + | |||
| + | When you have multiple <<set>> macro tags next to one another, you can replace them with a shorthand that uses only one <<set>>. Simply take the operations in each instance, and join them together using either commas or semicolons. | ||
| + | For instance, these three macro tags: | ||
| + | <code><<set $pants = "large">> | ||
| + | <<set $shoes = "huge">> | ||
| + | <<set $spats = "classy">></code> | ||
| + | ...can be changed to just this: | ||
| + | <code><<set $pants = "large"; $shoes = "huge"; $spats = "classy">></code> | ||
| + | ====A note about <<set>> and links==== | ||
| + | |||
| + | It is easy to assume that the placement of links in a passage has some bearing on what the game's variable state will be once you click it: | ||
| + | <code> | ||
| + | /% The following code is ineffectual %/ | ||
| + | <<set $lamp to "red">> | ||
| + | [[The lamp is red]] | ||
| + | <<set $lamp to "blue">> | ||
| + | [[The lamp is blue]] | ||
| + | </code> | ||
| + | But this is erroneous! All of these [[<<set>>]] macros are run as soon as the passage is displayed, in order. Clicking the "The lamp is red" link won't cause the <<set $lamp to "blue">> tag to not have happened. | ||
| + | |||
| + | To achieve the desired effect in the above passage, you should use [[link|setter links]]: | ||
| + | <code> | ||
| + | [[The lamp is red][$lamp = "red"]] | ||
| + | [[The lamp is blue][$lamp = "blue"]] | ||
| + | </code> | ||
set.txt · Last modified: 2017/10/09 20:39 (external edit)
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