Difference between revisions of "Constructor"

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m (Usage)
Line 13: Line 13:
 
var temp: TNewMapObject;
 
var temp: TNewMapObject;
 
begin
 
begin
   temp := TNewMapObject.Create;
+
   temp := TNewMapObject.Create; // constructor
 
   temp.X := posx;
 
   temp.X := posx;
 
   temp.Y := posy;
 
   temp.Y := posy;
 
   temp.Style := 16;
 
   temp.Style := 16;
 
   Map.AddObject(temp); // we could also save object's ID (newly spawned medkit)\
 
   Map.AddObject(temp); // we could also save object's ID (newly spawned medkit)\
   temp.Free; // IMPORTANT!
+
   temp.Free; // IMPORTANT! destructor
 
end;
 
end;
  

Revision as of 15:44, 12 August 2013

Description

Constructors are used to allocate memory for a new object/class/variable etc.
It's important to remember to free previously allocated memory by using Destructors

Usage

There are some user constructable classes in Script Core 3, for example TNewPlayer and TNewMapObject.
Below example shows the usage of TNewMapObject.Create, which is this classes constructor.

procedure SpawnMedkit(posx,posy: single);
var temp: TNewMapObject;
begin
  temp := TNewMapObject.Create; // constructor
  temp.X := posx;
  temp.Y := posy;
  temp.Style := 16;
  Map.AddObject(temp); // we could also save object's ID (newly spawned medkit)\
  temp.Free; // IMPORTANT! destructor
end;

procedure MyOnSpeak(p: TActivePlayer; Text: string);
begin
  if lowercase(Text) = 'Medic!' then
    SpawnMedkit(p.X,p.Y);
end;