poIImagePlane LocateBy3Points

Aligns a 3D image plane with a model.

Syntax

Imageplane_handle LocateBy3Points pointList

Application

HyperView Tcl Modify

Description

An image plane in 3D mode can be aligned with a model to check correlation between a video and a simulation. This command aligns the image plane by defining three points on the model and three corresponding points on the video or image. The image plane is then scaled and positioned appropriately to match the points specified.

Inputs

pointList: The alignment point list. The list consists of the X, Y, Z values for three points on the model, followed by three corresponding X, Y points on the image.

Example

To create a 3D image plane and position them in 2D and 3D space:

hwi OpenStack
if {[catch {
    hwi GetActiveClientHandle client_handle
    hwi GetSessionHandle session_handle
    client_handle GetImagePlaneCtrlHandle ipc_handle
    set ipid1 [ipc_handle AddImagePlane Logo1]
    ipc_handle GetImagePlaneHandle imageplane_handle $ipid1
    imageplane_handle SetFileName g:/samples2/VideoOverlay/Altair_logo.jpg
    imageplane_handle SetMode 3D
    imageplane_handle SetCrop 0 0 0.9995 0.995
    imageplane_handle LocateBy3Points "187 0.0 500.0 337.0 605.0 507.0 336.9 604.5 670.4 0 0 880 0 880 212"
    imageplane_handle SetFilterType ColorAlpha;
    imageplane_handle SetFilterMode equal;
    imageplane_handle SetColorAlphaTarget "255 255 255"
    imageplane_handle SetColorAlphaTolerance 18
    imageplane_handle SetMipMapMode Linear1
    puts "*****"
    puts "Alignment Mode = [imageplane_handle GetAlignmentMode]";
    puts "Alignment Data = [imageplane_handle GetAlignmentData]";
    puts "*****"
    client_handle Draw
} result]} {
    global errorInfo;
    puts stderr $result;
    puts "[session_handle GetError]";
    puts stderr "*** Tcl TRACE ***";
    puts stderr $errorInfo;
} else {
    puts "No errors.";
    puts "Warnings: ";
    puts "    [session_handle GetError]";
}

hwi CloseStack

Output:

*****
Alignment Mode = 3POINT
Alignment Data = 187.000000 0.000000 500.000000 337.000000 605.000000 507.000000 336.899994 604.500000 670.400024 0 0 880 0 880 212 
*****
No errors.
Warnings:

Errors

Returns HW_InvalidHandle if the image plane handle is invalid, or HW_Error if the transform string is invalid.