(1.4.0) Screen Windows

At some point you will want to route the Canvas from Igloo Core Engine out of your computer, ideally to a really big screen. This can be achieved by configuring one or more Screen windows, and optionally Warping and Blending the output within those windows.

Screen Window Settings

Window Settings are configured in the ScreenWindowSettings.xml, typically found at

C:\ProgramData\Igloo Vision\IglooCoreEngine\settings

One of more Windows can be configured, with each Window displaying a subsection of the Workspace Canvas.

<windows>
    <window>
        <winXPos>1920</winXPos>
        <winYPos>0</winYPos>
        <winWidth>1920</winWidth>
        <winHeight>1080</winHeight>
        <startX>0.000000000</startX>
        <startY>0.000000000</startY>
        <subWidth>0.000000000</subWidth>
        <subHeight>1.000000000</subHeight>
    </window>
	<window>
        <winXPos>3840</winXPos>
        <winYPos>0</winYPos>
        <winWidth>1920</winWidth>
        <winHeight>1080</winHeight>
        <startX>0.500000000</startX>
        <startY>0.000000000</startY>
        <subWidth>0.500000000</subWidth>
        <subHeight>1.000000000</subHeight>
    </window>
</windows>

winXPos

The X position of the top left corner of the Window in screen coordinates

winYPos

Y position of the top left corner of the Window in screen coordinates

winWidth

The width of the window in pixels

winHeight

The height of the window in pixels

startX

The starting X position of the canvas subsection to be drawn into the window, in normalised coordinates i.e. 0-1

startY

The starting Y position of the canvas subsection to be drawn into the window, in normalised coordinates i.e. 0-1

subWidth

The width of the canvas subsection to be drawn into the window, in normalised coordinates i.e. 0-1

subHeight

The height of the canvas subsection to be drawn into the window, in normalised coordinates i.e. 0-1

stereoFormat

The stereo output setting for individual windows, The possible values for this tag are:

0 : Top-Bottom

1 : Side-by-Side

2 : Left Eye Only

3 : Right Eye Only

Examples

This example assumes you have one 1920x1080 screen and you want to display the entire canvas on this screen.

This example assumes you have two screens each 1920x1080, and you want to display the left half of the canvas on Screen 1 and the right half on Screen 2.

Output Warp

Igloo Warper

The Igloo Warper application can be used to generate Warp & Blending files which are applied to Igloo Core Engine’s Output windows.

Requires Warper version 1.20.x +

Within the Igloo Warper’s menu navigate to Config > High Performance Warping > I C E > Export Warping file.

The export may take some time depending on the number of displays and their resolution. Once finished, the Warping files are saved to C:\ProgramData\Igloo Vision\IglooCoreEngine\warping

Warping is controlled by the two exported files

Screen-warp32.bmp

This file is not really a bitmap but lookup table for the X,Y coordinates of the warped image.

Screen-edgeBlend.bmp

Canvas Mask

When required, the Igloo Setup Tool will export an additional mask canvasMask.png which is applied to Canvas space rather than Screen space. This file should be moved to

C:\ProgramData\Igloo Vision\IglooCoreEngine\warping

See (1.4.0) Igloo Setup for more info on the Igloo Setup tool

Edge Blend to Soften Aliasing

A small edge blend can be used counteract aliasing. Typically, you may see this on the top edge of the Warp after exporting for a cylindrical screen.

In the Warpers blend settings, set the Top Global Gamma to 0
Increase the Top Width setting until the blend covers between 1-5 pixels
Increase the Top Global Gamma until you see a smooth transition to black
Repeat for all Projectors

Scalable Warp & Blend

Igloo Core Engine supports warp and blend through the integration of the Scalable SDK. Scalable Display Technologies

Igloo Core Engine will load the Scalable calibration from the standard Scalable export location,

C:\ProgramData\Scalable Display\DEI\calibration