GetClone
From MaratisWiki
(Difference between revisions)
Dahnielson (Talk | contribs) |
|||
| (3 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
| + | {{lua-function|getClone|object}} | ||
| + | |||
Clone an object. | Clone an object. | ||
| − | + | {{lua-function-param|object|object to operate on}} | |
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | <nowiki>object = getObject("object") | |
| − | + | objectClone = getClone(object)</nowiki> | |
| − | + | ||
| − | + | ||
For referencing you can store them into a table : | For referencing you can store them into a table : | ||
| − | + | <nowiki>object = getObject("object") | |
| − | + | cloneList = {} | |
| − | + | function onSceneUpdate() | |
| − | + | if onKeyDown("SPACE") then | |
| − | + | table.insert(cloneList, #cloneList + 1, getClone(object)) -- create a clone | |
| − | + | ||
end | end | ||
| + | end</nowiki> | ||
With that method, the first clone will be cloneList[1], second clone will be cloneList[2], and so on.. | With that method, the first clone will be cloneList[1], second clone will be cloneList[2], and so on.. | ||
| Line 25: | Line 22: | ||
To manage all these clones at once you could add to the script, for example : | To manage all these clones at once you could add to the script, for example : | ||
| − | + | <nowiki>for i=1, #cloneList do | |
| − | + | rotate(cloneList[i], {0, 0, 1}, 1, "local") | |
| − | + | end</nowiki> | |
In this case all the clones currently on the scene and the newly created ones will rotate. | In this case all the clones currently on the scene and the newly created ones will rotate. | ||
| + | |||
| + | '''Notes:''' | ||
| + | * They keeps the base object active behavior | ||
| + | * They keeps physics proprieties | ||
| + | * They don't keep the translate/force/etc.. values of the base object from lua script (because they are new objects) | ||
| + | |||
| + | '''Warning:''' Spawning a lot of clones in a very short time may cause slow-down, because. | ||
| + | * memory allocation : each cloning allocate new memory, fast games (like a shoot'em'up) usually pre-allocate memory. | ||
| + | * when using physics, the new object need to be also allocated to the physics world | ||
| + | * when using sound, the source need to be also allocated to the sound context | ||
[[Category:Lua scripting]] | [[Category:Lua scripting]] | ||
[[Category:Lua function]] | [[Category:Lua function]] | ||
[[Category:Object]] | [[Category:Object]] | ||
Latest revision as of 16:03, 15 February 2014
getClone(object)
Clone an object.
-
object: object to operate on
object = getObject("object")
objectClone = getClone(object)
For referencing you can store them into a table :
object = getObject("object")
cloneList = {}
function onSceneUpdate()
if onKeyDown("SPACE") then
table.insert(cloneList, #cloneList + 1, getClone(object)) -- create a clone
end
end
With that method, the first clone will be cloneList[1], second clone will be cloneList[2], and so on..
To manage all these clones at once you could add to the script, for example :
for i=1, #cloneList do
rotate(cloneList[i], {0, 0, 1}, 1, "local")
end
In this case all the clones currently on the scene and the newly created ones will rotate.
Notes:
- They keeps the base object active behavior
- They keeps physics proprieties
- They don't keep the translate/force/etc.. values of the base object from lua script (because they are new objects)
Warning: Spawning a lot of clones in a very short time may cause slow-down, because.
- memory allocation : each cloning allocate new memory, fast games (like a shoot'em'up) usually pre-allocate memory.
- when using physics, the new object need to be also allocated to the physics world
- when using sound, the source need to be also allocated to the sound context
