point to resolution conversion

Question

I am using gaze detection hardware and i am having some numeric issues. First off the co-ordinates work from (0,0) [top left of the screen] to (1,1) [bottom right of the screen]. When i gaze to the top left of the screen the system picks up (0.35,0.30) when I gaze to the bottom right the system picks up (0.65, 0.80) The reason it is picking up these values instead of (0,0) and (1,1) is because the screen resolution is 1600x900 but my application only occupies a portion of the screen at (817x500). My question is, how can i convert actual numbers like (0.35,0.30) to a location on the screen such as (400,200) given that my application windows is (817x500)??

I am using VB6.

score 2 · Accepted Answer · answered Jul 15 '11 at 08:16

Screen.Width and Screen.Height return the width and height of the entire screen.
The form Width and Height properties return the width and height of your form frm. These are the external dimensions, including the borders and title bar.

Try adding something like this to your form code (air code)

Sub GazeToForm( ByVal gazeX As Double, ByVal gazeY As Double, _
  ByRef frmX As Double, ByRef frmY As Double) 

  frmX = (gazeX * Screen.Width) - Me.Left 
  frmY = (gazeY * Screen.Height) - Me.Top 

End Sub

All these coordinates and dimensions are in twips, as usual in VB6.

score 1 · Answer 2 · answered Jul 14 '11 at 15:06

1

You can write ScreenWidth * x - Window.Left

answered Jul 14 '11 at 15:06

SLaks

868,454
176
1,908
1,964

Can you please explain what this code does? Also what is Window.Left? – Mark Manickaraj Jul 14 '11 at 15:14
It performs basic arithmetic. It scales the number up to the resolution of the screen. `Window.Left` is the X coordinate of your window. – SLaks Jul 14 '11 at 15:19

point to resolution conversion

2 Answers2