I'm trying to use the Compare Method to sort out z-ordering, now I can get it to work with a Player Type, but if I have a PlayerType Type the function returns an Unhandled Exception error. Here is the code which works:
Strict
Type Entity
Field x:Float,y:Float,speed:Float,dir:Float,maxspeed:Float, range:Float
Field currentFrame:Int,startFrame:Int,lastFrame:Int,timer:Float,frameRate:Int
Field image:TImage
Field file
Field font:TImageFont
Field name:String
Field health:Float
End Type
Type Player Extends Entity
Field health:Float, mana:Float
Field score:Int = 0
Function Create:Player(name:String,x,y)
Local ent:Player = New Player
ent.name = name
ent.x = x
ent.y = y
ent.health = 50
ent.image = LoadAnimImage("Media/warrior.bmp",128,128,0,1)
entity_list.AddLast(ent)
Return ent
End Function
Method Update()
If KeyDown(KEY_RIGHT)
x = x +1
EndIf
If KeyDown(KEY_LEFT)
x = x -1
EndIf
If KeyDown(KEY_DOWN)
y = y +1
EndIf
If KeyDown(KEY_UP)
y = y -1
EndIf
DrawImage image,x,y,0
End Method
Method Compare( other:Object )
Return y -Player(other).y
End Method
EndType
Graphics 640,480,0
Global entity_list:TList = CreateList()
Local player1:Player = Player.Create("Mikey",50,50)
While Not KeyHit(KEY_ESCAPE)
Cls
SortList (entity_list)
For Local p:Player = EachIn entity_list
p.Update()
Next
player1.x :+ (KeyDown(KEY_RIGHT) - KeyDown(KEY_LEFT))*2
player1.y :+ (KeyDown(KEY_DOWN) - KeyDown(KEY_UP))*2
Flip
Wend
So the above works, but if we introduce a PlayerType it returns an error at Method Compare.
Strict
Type Entity
Field x:Float,y:Float,speed:Float,dir:Float,maxspeed:Float, range:Float
Field currentFrame:Int,startFrame:Int,lastFrame:Int,timer:Float,frameRate:Int
Field image:TImage
Field file
Field font:TImageFont
Field name:String
Field health:Float
End Type
'--------------------------------
Type PlayerType
Function Create:PlayerType(name:String,anim_file:String)
Local ent:PlayerType = New PlayerType
ent.image = anim_file
ent.name = name
entity_list.AddLast(ent)
Return ent
End Function
End Type
'--------------------------------
Type Player Extends Entity
Field playerType:PlayerType
Field health:Float, mana:Float
Field score:Int = 0
Function Create:Player(name:String,x,y,playerType:PlayerType)
Local ent:Player = New Player
ent.name = name
ent.x = x
ent.y = y
ent.health = 50
ent.playerType = playerType
ent.image = LoadAnimImage(playerType.image,128,128,0,1)
entity_list.AddLast(ent)
Return ent
End Function
Method Update()
If KeyDown(KEY_RIGHT)
x = x +1
EndIf
If KeyDown(KEY_LEFT)
x = x -1
EndIf
If KeyDown(KEY_DOWN)
y = y +1
EndIf
If KeyDown(KEY_UP)
y = y -1
EndIf
DrawImage image,x,y,0
End Method
Method Compare( other:Object )
Return y -Player(other).y 'ERROR HERE
End Method
EndType
Graphics 640,480,0
Global entity_list:TList = CreateList()
Global warrior:PlayerType=PlayerType.Create("Warrior")',"Media/warrior.bmp"
'Player instance
Local player1:Player = Player.Create("Mikey",50,50,warrior)
While Not KeyHit(KEY_ESCAPE)
Cls
SortList (entity_list)
For Local p:Player = EachIn entity_list
p.Update()
Next
player1.x :+ (KeyDown(KEY_RIGHT) - KeyDown(KEY_LEFT))*2
player1.y :+ (KeyDown(KEY_DOWN) - KeyDown(KEY_UP))*2
Flip
Wend
So I need to adjust the Method Compare code to allow for the PlayerType, but I'm not sure how?
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