SIGMA LBA-708 - Manual (Page 163)

9.3.1.11 CrosshairX, CrosshairY, CrosshairZ
These properties provide the crosshair x and y location, and the value of the pixel at the
crosshair.
9.3.1.12 CursorDelta
This property provides the straight-line distance from the cursor to the crosshair.
9.3.1.13 EnergyOfBeam
This property lets you calibrate the LBA to the energy of your laser. Setting this property is
identical to setting Energy of Beam in the LBA-PC Computations dialog. See sections 3.2.6.1 and
3.2.6.2 in the LBA-PC Operator’s Manual for a detailed description of Energy of Beam and the
Energy of Beam calibration procedure.
9.3.1.14 Bitmap
This property is a one-dimensional array of integer packaged as a Variant. This information can
be used to create a Windows bitmap or a LabVIEW picture.
Bitmap is an exact copy of the LBA-PC Beam Display Window. If the cursor is on then the cursor
will appear in the bitmap, if the color bar is on then the color bar will appear in the bitmap, etc.
The data in the array is packed as follows:
BitmapInfoHeader Windows BITMAPINFOHEADER structure
Palette 256 element array of Windows PALETTEENTRY
Bits Two-dimensional array of byte. The size of this array is
specified in BitmapInfoHeader.biSizeImage
In LabVIEW, convert this property using the ‘Variant To Data’ VI, and then pass the resulting
array to the LbapcBitmap.vi. The output from this VI is a LabVIEW picture. OnNewBitmap.vi
contains an example of receiving and displaying a picture using the OnNewFrame event. Utility
and example VI’s are packaged in LbapcActiveX.llb, which can be found in the
“ActiveX\Examples\LabVIEW” directory under the LBA-PC installation directory. Please note, you
must have the LabVIEW Full, Professional, or Developer Development System in order to use
OnNewBitmap.vi
In Visual Basic, you can convert the bitmap data into a standard Picture object. An example
Visual Basic project, LbapcActiveXExample.vbp, contains a function called NewBitmap which
shows you how to convert the bitmap data into a Picture object. This project can be found in
“ActiveX\Examples\Visual Basic” directory under the LBA-PC installation directory.
9.3.1.15 FrameNumber
This property is the frame number as displayed in the lower right corner of LBA-PC.
Operator’s Manual LBA-PC
Doc. No. 10654-001, Rev 4.10
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