- Corrected/updated info on Xor/setd/getd/callfunc/callsub/return and updated some examples to use "better" code.
git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@9838 54d463be-8e91-2dee-dedb-b68131a5f0ec
This commit is contained in:
FlavioJS
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b09a064281
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b8bc4928ac
@ -9,7 +9,7 @@
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//= Maeki Rika - A section on general concepts and lots of
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//= other updates and additions.
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//===== Version ===========================================
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//= 3.00.20070208
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//= 3.02.20070209
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//=========================================================
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//= 1.0 - First release, filled will as much info as I could
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//= remember or figure out, most likely there are errors,
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@ -56,6 +56,9 @@
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//= 3.01.20070209
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//= Updated 'cutin' (removed lies, removed outdated bmp list) [ultramage]
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//= Removed 'cutincard' since eA no longer implements it
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//= 3.02.20070209
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//= Corrected/updated info on Xor/setd/getd/callfunc/callsub/return and
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//= updated some examples to use "better" code. [FlavioJS]
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//===== Compatible With ===================================
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//= LOL, can be used by anyone hopefully
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//===== Description =======================================
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@ -644,6 +647,13 @@ Resume of the allowed variable and array scopes
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|.@Int | OK! | OK! |
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+----------+------+-------+
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Variable References
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-------------------
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//##TODO
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Operators
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---------
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@ -677,7 +687,7 @@ you can not compare numbers to strings.
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Examples:
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1=1 is True.
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1==1 is True.
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1<2 is True while 1>2 is False.
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@x>2 is True if @x is equal to 3. But it isn't true if @x is 2.
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@ -688,12 +698,12 @@ strings by alphabet would be pointless anyway.
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Comparisons can be stacked in the same condition:
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&& - Is True if and only if BOTH sides are true.
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('1==1 && 2=2' is true. '2=1 && 1=1' is false.)
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('1==1 && 2==2' is true. '2==1 && 1==1' is false.)
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|| - Is True if either side of this expression is True.
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1=1 && 2=2 is True.
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1=1 && 2=1 is False.
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1=1 || 2=1 is True.
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1==1 && 2==2 is True.
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1==1 && 2==1 is False.
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1==1 || 2==1 is True.
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Logical bitwise operators work only on numbers, and they are the following:
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@ -747,19 +757,28 @@ Logical bitwise operators work only on numbers, and they are the following:
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This would return the messages about option 2, 3 and 5 being shown (since we've set
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the 2,4 and 16 bit to 1).
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^ - Xor.
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The bitwise operator XOR (eXclusive OR) sets to 0 a binary position if both numbers have a 1
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in the said position. On the other hand, it sets to 1 if there's a 1 in any of the number in
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the said binary position.
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This is the counter-part of the OR operator, the opposite if you like. This is used to remove a
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bitmask, which is the same as substracting it.
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The bitwise operator XOR (eXclusive OR) sets a binary position to 0 if both
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numbers have the same value in the said position. On the other hand, it
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sets to 1 if they have different values in the said binary position.
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This is another way of setting and unsetting bits in bitmasks.
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Example:
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- We set the variable first:
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set a,2|4|8|16; // this would be the same as 2+4+8+16 = 30
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- After some checks, we find he didn't do the third quest, which we asigned the 3rd value (8)
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so now we have to remove it:
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set a,a^8; //this would be the same as 30-8 = 22. 22 = 16+4+2, which are the flags left.
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- First let's set the quests that are currently in progress:
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set inProgress,1|8|16; // quest 1,8 and 16 are in progress
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- After playing for a bit, the player starts another quest:
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if( inProgress&2 == 0 ){
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// this will set the bit for quest 2 (inProgress has that bit set to 0)
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set inProgress,inProgress^2;
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mes "Quest 2: find a newbie and be helpfull to him for an hour.";
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close;
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}
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- After spending some time reading info on Xor's, the player finally completes quest 1:
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if( inProgress&1 && isComplete ){
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// this will unset the bit for quest 1 (inProgress has that bit set to 1)
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set inProgress,inProgress^1;
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mes "Quest 1 complete!! You unlocked the secrets of the Xor dinasty, use them wisely.";
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close;
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}
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Labels
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------
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@ -849,9 +868,8 @@ Example:
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monster "prontera.gat",123,42,"Poringz0rd",2341,23,"Master::OnThisMobDeath";
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amatsu.gat,13,152,4 script Master 767,{
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mes "Hi there";
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close;
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mes "Hi there";
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close;
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OnThisMobDeath:
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announce "Hey, "+strcharinfo(0)+" just killed a Poringz0rd!",bc_blue|bc_all;
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@ -1008,7 +1026,7 @@ of 'end' stops this, and ends the script.
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This command will set a variable to the value that the expression results in.
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This is the only way to set a variable directly.
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This is the most basic script command and is uses a lot whenever you try to do
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This is the most basic script command and is used a lot whenever you try to do
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anything more advanced than just printing text into a messagebox.
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set @x,100;
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@ -1022,10 +1040,12 @@ integer in this language) and make @x equal it.
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---------------------------------------
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*setd "variable name",<value>;
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*setd "<variable name>",<value>;
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Works almost identical as set, just that the variable name is identified as a string,
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thus can be constructed dynamically.
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This command is equivalent to:
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set getd("variable name"),<value>;
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Example:
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set $var$, "Poring";
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@ -1040,23 +1060,29 @@ mes $Poporing123$; // Will return Poporing is cool.
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*getd("<variable name>")
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Retrieves variable, name can be constructed dynamically. Refer to setd for usage.
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Returns a reference to a variable, the name can be constructed dynamically.
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Refer to setd for usage.
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Example:
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set getd("$varRefence"), 1;
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set @i, getd("$pikachu");
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---------------------------------------
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*getvariableofnpc <variable name>,<npc name>;
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*getvariableofnpc(<variable>,"<npc name>")
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Enables you to get a NPC variable (. prefix) from the given NPC. This can only be used to get . variables.
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Returns a reference to a NPC variable (. prefix) from the target NPC.
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This can only be used to get . variables.
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Example(s):
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//This will return the value or .var, note that this can't be used, since the value isn't catched.
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getvariableofnpc .var,"A NPC";
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//This will return the value of .var, note that this can't be used, since the value isn't catched.
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getvariableofnpc(.var,"TargetNPC");
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//This will set the .v variable to the value of the A NPC's .var variable.
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set .v,getvariableofnpc(.var,"A NPC");
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//This will set the .v variable to the value of the TargetNPC's .var variable.
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set .v,getvariableofnpc(.var,"TargetNPC");
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//This will set the .var variable of TargetNPC to 1.
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set getvariableofnpc(.var,"TargetNPC"),1;
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---------------------------------------
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@ -1068,9 +1094,11 @@ with other command, such as "if", but often used on it's own.
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...
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goto Label;
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mes "This will not be seen";
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Label:
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Label:
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mes "This will be seen";
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Note by FlavioJS: goto's are "evil" and should be avoided if possible (ò_ó)
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---------------------------------------
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*menu "<menu option>",<label>{,"<menu option>",<label>,...};
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@ -1116,36 +1144,34 @@ to leave any gaps. Normally, you do it with a loop and an extra counter, like
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this:
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setarray @possiblemenuitems$[0],<list of potential menu items>;
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set @i,0; // That's our loop counter.
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set @j,0; // That's the menu lines counter.
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makemenuloop:
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// We record the number of option into the list of options actually
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// available. That 'condition' is whatever condition that determines whether
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// We loop through the list of possible menu items.
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// @i is our loop counter.
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for( set @i,0; @i<getarraysize(@possiblemenuitems$) ; set @i,@i+1 )
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{
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// That 'condition' is whatever condition that determines whether
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// a menu item number @i actually goes into the menu or not.
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if (<condition>) set @menulist$[@j],@possiblemenuitems$[@i];
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if (<condition>)
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{
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// We record the option into the list of options actually available.
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// We just copied the string, we do need it's number for later though, so we
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// file it away as well.
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set @menulist$[@j],@possiblemenuitems$[@i];
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if (<condition>) set @menureference[@j],@i;
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// We just copied the string, we do need it's number for later
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// though, so we record it as well.
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// Since we've just added a menu item into the list, we increment the menu
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// lines counter.
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set @menureference[@j],@i;
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if (<condition>) set @j,@j+1;
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// Since we've just added a menu item into the list, we increment
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// the menu lines counter.
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set @j,@j+1;
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}
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// We go on to the next possible menu item.
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set @i,@i+1;
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// And continue looping through the list of possible menu items until it
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// ends.
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if (@i<=getarraysize(@possiblemenuitems)) goto makemenuloop;
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}
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This will create you an array @menulist$ which contains the text of all items
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that should actually go into the menu based on your condition, and an array
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@ -1153,9 +1179,9 @@ that should actually go into the menu based on your condition, and an array
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(Remember, arrays start with 0.) There's less of them than the possible menu
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items you've defined, but the menu command can handle the empty lines - only if
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they are last in the list, and if it's made this way, they are. Now comes a
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dirty trick:
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// X is whatever the most menu items you expect to handle.
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dirty trick:
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menu @menulist$[0],-,@menulist$[1],-,....@menulist$[<X>],-;
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This calls up a menu of all your items. Since you didn't copy some of the
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@ -1235,14 +1261,18 @@ function:
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next;
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set @number, rand(1,10);
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input @guess;
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if(@guess==@number) goto L_Correct;
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mes "[Woman]";
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mes "Sorry, that wasn't the number I was thinking of.";
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close;
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L_Correct:
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if(@guess==@number)
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{
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mes "[Woman]";
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mes "Well done that was the number I was thinking of";
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close;
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}
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else
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{
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mes "[Woman]";
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mes "Sorry, that wasn't the number I was thinking of.";
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close;
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}
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If you give the input command a string variable to put the input in, it will
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allow the player to enter text. Otherwise, only numbers will be allowed.
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@ -1251,14 +1281,18 @@ allow the player to enter text. Otherwise, only numbers will be allowed.
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mes "Please say HELLO";
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next;
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input @var$;
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if(@var$=="HELLO") goto L_Correct;
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mes "[Woman]";
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mes "Sorry you got it wrong";
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close;
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L_Correct:
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if(@var$=="HELLO")
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{
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mes "[Woman]";
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mes "Well done you typed it correctly";
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close;
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}
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else
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{
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mes "[Woman]";
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mes "Sorry you got it wrong";
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close;
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}
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Notice that in current SVN, you may not input a negative number with this
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command. This was done to prevent exploits in badly written scripts, which would
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@ -1306,15 +1340,13 @@ generally cleaner:
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close;
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}
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function%TAB%script%TAB%OddFunc%TAB%{
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if (getarg(0)%2==0) goto ItsEven;
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return (1);
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ItsEven:
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return (0);
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if (getarg(0)%2==0) return 0;// it's even
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return 1;// it's odd
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}
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---------------------------------------
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*callsub <label name>{,<argument>,...<argument>};
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*callsub <label>{,<argument>,...<argument>};
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This command will go to a specified label within the current script (do NOT use
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quotes around it) coming in as if it were a 'callfunc' call, and pass it
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@ -1330,10 +1362,12 @@ script.
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mes "Lets see if you win";
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callsub Check;
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mes "Well done you have won";
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close;
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Check:
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set @win, rand(2);
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if(@win==0) return;
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mes "Sorry you lost";
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close;
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---------------------------------------
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@ -1341,9 +1375,9 @@ script.
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This function is used when you use the 'callsub' or 'callfunc' commands. In the
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call you can specify variables that will make that call different from another
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one. This function willwill return an argument the function or subroutine was
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one. This function will return an argument the function or subroutine was
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called with, and is the normal way to get them.
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This is another thing that can let you use the same but of code more than once.
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This is another thing that can let you use the same code more than once.
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Argument numbering starts with 0, i.e. the first argument you gave is number 0.
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If no such argument was given, a zero is returned.
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@ -1381,49 +1415,16 @@ You can pass multiple arguments in a function call:
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getarg(0) would be 5, getarg(1) would be 4 and getarg(2) would be 3.
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'getarg()' can also be used to carry information back from using the "callfunc"
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script command, if the 'return' command is set to return a value:
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place.gat,50,50,6%TAB%script%TAB%Woman%TAB%115,{
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mes "[Woman]";
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mes "Lets see if you win";
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callfunc "funcNPC";
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mes "Well it seems you have "+getarg(0);
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}
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function%TAB%script%TAB%funcNPC%TAB%{
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set @win, rand(2);
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if(@win==0) return(won);
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return(lost);
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}
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It is, however, better to use 'set' to get this value instead (see 'callfunc')
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because otherwise you can't call functions from within other functions. (Return
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values mess up the stack.)
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---------------------------------------
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*return {(<value>)};
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*return {<value>};
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When you use callsub or callfunc, this command allows you to go back to the
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calling script. You can optionally return with a value telling the calling
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program what exactly happened. To get at this value, you will have to use the
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'set' command:
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program what exactly happened.
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set <variable>,callfunc "<your function>"
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Note the round brackets. Turns out you have to enclose just about anything in
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brackets if it isn't a straight number for the return command to work with it:
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return (@x+@y);
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Also note that
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if (<condition>) return (<whatever>);
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does NOT always work, even though it would make scripts a lot cleaner, and it
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might be wiser to avoid using it like that.
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For an example see 'callfunc' and 'callsub'
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callfunc "<your function>";// when nothing is returned
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set <variable>,callfunc("<your function>");// when a value is being returned
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---------------------------------------
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Loading…
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Reference in New Issue
Block a user