How to get and store screen positions

Monkey Forums/Monkey Beginners/How to get and store screen positions

sal	(Posted 2014) [#1]

I just started with all this , so dont hate me! I am scratching my head over how to store a screen XY position upon a touchdown. Can anyone give me some hints please? I suspect I am not quite grok'ing the data structures in Monkey. The line marked "BAD" is the problem, any help appreciated! (PS the dot.png is just a small circle)
====================================

Import mojo

Global DataPoint : TPoint[ 99 ]

Class Tpoint

Field x : Float
Field y : Float

Method New(px : Float, py : Float )
Self.x=px
Self.y=py
End
End

Class StoreXY Extends App

Field pointImage:Image
Field points:=New List<Tpoint>

Method OnCreate()

pointImage=LoadImage( "dot.png",1,Image.XYPadding )
SetUpdateRate 60
End

Method OnUpdate()

Local out:=New List<Tpoint>
For Local dot:=Eachin points
out.AddLast dot
Next

For Local i=0 Until 32
If TouchDown( i )

points.AddLast New Tpoint( TouchX(i),TouchY(i) )
' DataPoint[ 0 ] = New TPoint( TouchX(i),TouchY(i) ) <---BAD

Endif
Next
End

Method OnRender()

Local w=DeviceWidth,h=DeviceHeight
Cls
For Local position:=Eachin points
DrawImage pointImage,position.x,position.y
End
End
End

Function Main()
New StoreXY
End

Wylaryzel

(Posted 2014) [#2]

The global DataPoint is a TPoint, but for the class you had defined Tpoint.

Monkey is case sensitive, so an TPoint <> Tpoint :-)

if you change the DataPoint to a Tpoint as well it should work.

BR
Wyl

Paul - Taiphoz

(Posted 2014) [#3]

Welcome.. When posting code if you use the following tags will enclose and format your code.

Remove this space          \/
[code]Print "Hello World" [ /code]

sal	(Posted 2014) [#4]

Good spot Wylaryzel! much thanks! i've cleared it up now and it does what I wanted.

and thanks Paul for the info re: posting code. I'll make sure I do that in the future.