Create object using array type and keep track of it?

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hoyoyo80

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Posted: 20th Feb 2018 04:43 Edited at: 20th Feb 2018 04:44

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Ok, im just try to understand array of type a bit more.
Let say i want to create an object type and i dont wish to know its initial size e.g object as objectyltype[10]

Let say i just use object as objectype(non array). Is they any way i can check the size later on or try to iterate thru all of ot later.

Thanks

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Ortu

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Posted: 20th Feb 2018 05:40 Edited at: 20th Feb 2018 05:45

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UDT arrays use the same principles as basic arrays. you don't have to initialize them to a size. you can .insert as needed. you can check the size and iterate using .length

+ Code Snippet

type myObjectData
    name as string
    number as integer
endtype

myObjectList as myObjectData[]

thisObject as myObjectData
thisObject.name = "my first object"
thisObject.number = 1
myObjectList.insert(thisObject)

thisObject.name = "my second object"
thisObject.number = 2
myObjectList.insert(thisObject)

do

print("I have " + str(myObjectList.length + 1) + " objects. They are:")

for i = 0 to myObjectList.length
    print(myObjectList[i].name)
next i

sync()
loop

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hoyoyo80

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Posted: 20th Feb 2018 07:51

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Ok...now i get it...im quite confuse with the type name and the list name..TQVM

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PHeMoX

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Posted: 28th Feb 2018 20:25

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If you are going to make such a list, it would also be a very useful thing to store the object ID, because things like raycasting return the ID number, not the .name or .number property.
I use a quick check that loops through a list and checks if object_hit from a raycast is equal to the myObject.ID and from there I can manipulate further. If you don't store the ID, it is pretty darn difficult to do much with the object, unless you're building something that operates entirely from the data based values only I guess.

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hoyoyo80

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Posted: 1st Mar 2018 00:49

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ok...back to basic.

dim test[]<---no size

i found that we cannot assign something in it using test[0]=value,test[1]=value2. This is true right? i use insert command but just to confirm.

Thanks

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PHeMoX

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Posted: 1st Mar 2018 17:26

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It's a bit hidden in the manual but if you go to Guides -> General - Arrays in version 2 , then you do get to see basically all of the syntax for arrays usage.

As for multidimensional arrays, I tend to fill my types with an array I created before storing them in a type (although you can do this straight away I think, not exactly sure). Unless you have a different intention for how to use multidimensional arrays, I would look at the part in the guides section and Arrays in version 2 that talks about 'subarrays'. Also take a good look at the example already in this thread about myObjectlist and adding objects to that. It kind of shows all you need to know in order to use them.

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PHeMoX

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Posted: 1st Mar 2018 23:37

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Yeah, that works indeed, however you can totally use 'empty' arrays too, like this:

Quote: "myObjectList as myObjectData[]"

The myObjectList still starts out as a completely empty array and with the type example given by Ortu it is easy to fill the array afterwards. I guess this was moreso Hoyoyo80's question, but you can have arrays that start out 0 initially.

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Phaelax

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Posted: 2nd Mar 2018 15:15

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Keep in mind, if you create an empty array then insert into it, your first element will be at 0.

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PartTimeCoder

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Posted: 2nd Mar 2018 19:10

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And rather than using loops to find your object_id, use the .find() array function, its far quicker when you havelots of objects.

+ Code Snippet

Type myObject
	id
	name as string
EndType
Global gMyObjects as myObject[]

for i=1 to 1001
	CreateObjectBox(i, 10, 10, 10)
	SetObjectPosition(i, random(0,500) - 250, random(0,500) - 250, random(0,500) - 250)
	myobj as myObject
	myobj.id=i
	myobj.name="objectname"+Str(i)
	gMyObjects.insert(myobj)
next

time# = timer()
for i=0 to 1000
	if gMyObjects[i].id=1001
		test1#=timer()-time#
		exit
	endif
next

time# = timer()
if gMyObjects.find(1001)
	test2#=timer()-time#
endif

do
	print(test1#)
	print(test2#)
	sync()
loop

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Blendman

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Posted: 2nd Mar 2018 19:17

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Multidim , isnt like that ?

Dim foo as footype [-1,-1]

I'm not sur

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PartTimeCoder

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Posted: 2nd Mar 2018 19:31

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You can not have a multidimension type, but yes for defining empty MD arrays you use -1

Dim arr[-1,-1]
or
Global arr as string[-1,-1]

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PHeMoX

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Posted: 3rd Mar 2018 15:40 Edited at: 3rd Mar 2018 15:41

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Quote: "You can not have a multidimension type, but yes for defining empty MD arrays you use -1"

Maybe not literally, however doesn't that depend a bit on how you structure your data attached to it???

You can assign types to types and you can fill types with data arrays of any dimension or size.

edit: I should probably ask what the intentions are of using a multidimensional array for a more specific answer.

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Phaelax

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Posted: 6th Mar 2018 14:54

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Quote: "You can not have a multidimension type,"

You sure? Because I'm pretty certain I've stored 2D grid-based maps that way.

map as MapData[][]

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