poIImagePlane GetAlpha

Gets the alpha transparency associated with the image plane.

Syntax

Imageplane_handle GetAlpha

Application

HyperView Tcl Query

Description

This command returns the alpha or transparency setting for the image plane. The value returned is from 0 – 100, where 100 is completely opaque, and 0 is completely transparent. The transparency of an image plane in 3D mode is also affected by the Cull Angle settings.

Example

To create two image planes, and then query one of them for its basic properties and settings:

hwi OpenStack
hwi GetSessionHandle session_handle
session_handle GetProjectHandle project_handle
project_handle GetPageHandle page_handle [project_handle GetActivePage]
page_handle GetWindowHandle window_handle [page_handle GetActiveWindow]
window_handle GetClientHandle client_handle
client_handle GetImagePlaneCtrlHandle ipc_handle
set ipid1 [ipc_handle AddImagePlane Logo1]
ipc_handle GetImagePlaneHandle imageplane_handle $ipid1
imageplane_handle SetFileName g:/samples2/VideoOverlay/logo1.jpg
imageplane_handle SetMode background
imageplane_handle ReleaseHandle
set ipid2 [ipc_handle AddImagePlane Video1]
ipc_handle GetImagePlaneHandle imageplane_handle $ipid2
imageplane_handle SetFileName g:/samples2/VideoOverlay/video1.jpg
imageplane_handle SetMode background
imageplane_handle ReleaseHandle

puts "ImagePlane Basic Properties :";
ipc_handle GetImagePlaneHandle imageplane_handle $ipid1
puts "  ID =       [imageplane_handle GetID]";
puts "  Filename = [imageplane_handle GetFileName]";
puts "  Label =    [imageplane_handle GetLabel]";
puts "  Syncblock ID = [imageplane_handle GetSyncBlockID]";
puts "  Visibility = [imageplane_handle GetVisibility]";
puts "  Alpha =    [imageplane_handle GetAlpha]";
puts "  Mode  =    [imageplane_handle GetMode]";
puts "  Associated Model ID = [imageplane_handle GetAssociatedModelID]";
puts "  Cull Angle = [imageplane_handle GetCullAngle]";
puts "  Backface Visibility = [imageplane_handle GetBackFaceVisibility]";
puts "  Crop =     [imageplane_handle GetCrop]";
puts "  Stretch =  [imageplane_handle GetStretchToFit]";
puts "  Maintain Aspect =  [imageplane_handle GetMaintainAspectRatio]";
hwi CloseStack

Console Output

ImagePlane Basic Properties :
  ID =       1
  Filename = g:/samples2/VideoOverlay/logo1.jpg
  Label =    Logo1
  Syncblock ID = W1:V1
  Visibility = true
  Alpha =    100
  Mode  =    Background
  Associated Model ID = -1
  Cull Angle = 20
  Backface Visibility = false
  Crop =     0.00, 0.00, 1.00, 1.00
  Stretch =  false
  Maintain Aspect =  true

Errors

None.