Difference between revisions of "User:QQuix/Array sample code"
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Sample code added - Array walk
imported>QQuix (Added a limit to the depth of the dump) |
imported>QQuix (Sample code added - Array walk) |
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</dl></dl> | </dl></dl> | ||
=Introduction= | =Array deep dump= | ||
==Introduction== | |||
With the availability of arrays in OBSE 0017, it is quite easy (an useful) to create tree-like arrays to keep data available and organized. | With the availability of arrays in OBSE 0017, it is quite easy (an useful) to create tree-like arrays to keep data available and organized. | ||
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[ObjectTree][Clutter] = #Empty# | [ObjectTree][Clutter] = #Empty# | ||
=Setup= | ==Setup== | ||
The following script must be attached to some persistent objects. | The following script must be attached to some persistent objects. | ||
| Line 83: | Line 85: | ||
=Script= | ==Script== | ||
scn aaqqArrayDumpSCRIPT | scn aaqqArrayDumpSCRIPT | ||
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endif | endif | ||
loop | loop | ||
endif | |||
end | |||
=Array walk= | |||
==Introduction== | |||
This sample code allows walking a tree-like array structure | |||
Useful when one needs to access array data sequentially, one at a time, over many frames. | |||
The code allow for returning the previous or the next entry in the structure. When one branch ends, it jumps to the first entry of the next branch. | |||
This sample works on a multi level, tree like array. Each 'branch' of the tree being a StringMap array. The object at the end of the branch must not be a StringMap. Branches mey have different sizes. | |||
==Setup== | |||
This sample uses the following objects: | |||
* qqArrayWalk - a persistent object that holds the script. | |||
* qqGetNext, qqGetPrev and qqReset - persistent objects to be used as actionref | |||
===Usage=== | |||
To get the next entry: | |||
qqArrayWalk.Activate qqGetNext 1 | |||
let MyObject := qqArrayWalk.aReturnObject | |||
To get the previous entry: | |||
qqArrayWalk.Activate qqGetPrev 1 | |||
let MyObject := qqArrayWalk.aReturnObject | |||
To reset the loop to the first entry of the first branch: | |||
qqArrayWalk.Activate qqGetNext, 1 | |||
let MyObject := qqArrayWalk.aReturnObject | |||
==Script== | |||
scn qqArrayTreeWalkSCRIPT | |||
array_var aReturnObject | |||
ref xSelf | |||
;------------------------------------------------------- | |||
; These arrays hold the branch and key data for each level as the loop goes down a branch | |||
; Used to walk the branch back up | |||
;------------------------------------------------------- | |||
array_var aBranches | |||
array_var aKeys | |||
;------------------------------------------------------- | |||
; These vars hold the current position | |||
;------------------------------------------------------- | |||
array_var aBranch | |||
string_var sKey | |||
short xLevel | |||
string_var sType | |||
short xForward | |||
begin onactivate | |||
if getactionref == qqGetNext | |||
set xForward to 1 | |||
elseif getactionref == qqGetPrev | |||
set xForward to 0 | |||
endif | |||
if getactionref == qqReset || xSelf == 0 | |||
;----------------------------------------------- | |||
; [Re]initialize the loop | |||
;----------------------------------------------- | |||
set xSelf to getself | |||
if aBranches == 0 | |||
let aBranches := ar_construct array | |||
let aKeys := ar_construct array | |||
endif | |||
set xLevel to 0 | |||
let aBranch := g.gaObjectTree ; The array to be walked | |||
let sKey := ar_Last aBranch | |||
set xForward to 1 | |||
endif | |||
if xForward | |||
let sKey := ar_Next aBranch sKey | |||
else | |||
let sKey := ar_Prev aBranch sKey | |||
endif | |||
saveip 4 | |||
if eval ( sKey == ar_BadStringIndex ) | |||
set xLevel to xLevel - 1 | |||
if xLevel >= 0 | |||
;----------------------------------------------------------- | |||
; End of array - go up one level | |||
;----------------------------------------------------------- | |||
let aBranch := aBranches [xLevel] | |||
let sKey := aKeys [xLevel] | |||
if xForward | |||
let sKey := ar_Next aBranch sKey | |||
else | |||
let sKey := ar_Prev aBranch sKey | |||
endif | |||
goto 4 | |||
else | |||
;----------------------------------------------------------- | |||
; End of last array - start over | |||
;----------------------------------------------------------- | |||
set xLevel to 0 | |||
let aBranch := g.gaObjectTree | |||
if xForward | |||
let sKey := ar_First aBranch | |||
else | |||
let sKey := ar_Last aBranch | |||
endif | |||
goto 4 | |||
endif | |||
endif | |||
let sType := typeof aBranch [sKey] | |||
if eval (sType == "StringMap") | |||
;----------------------------------------------------------- | |||
; Entry is an array - go down one level | |||
;----------------------------------------------------------- | |||
let aBranches [xLevel] := aBranch | |||
let aKeys [xLevel] := sKey | |||
set xLevel to xLevel + 1 | |||
let aBranch := aBranch [sKey] | |||
if xForward | |||
let sKey := ar_First aBranch | |||
else | |||
let sKey := ar_Last aBranch | |||
endif | |||
goto 4 | |||
else | |||
;----------------------------------------------------------- | |||
; End of branch - set aReturnObject | |||
;----------------------------------------------------------- | |||
let aReturnObject := aBranch [sKey] | |||
endif | endif | ||
end | end | ||