Introduction
Igloo Setup is used to generate configuration files for an Igloo installation, also known as a projection scene.
A projection scene specifies the geometry and properties of a set of screens in a given space.
The application starts up with the initial view shown below.
The user interface consists of four tabs - Screen, Canvas, Projectors and Export, which are intended to be used sequentially. These represent the stages in the Igloo Setup modelling pipeline. The workflow begins by defining the geometry of the Screen. The Canvas tab uses the screen dimensions to determine the pixel resolution of the space. Likewise, the Projectors tab uses the canvas to specify the projector regions and other attributes. Finally, the configuration files are generated in the Export tab.
Screen
The Screen tab specifies the geometry of the projection scene.
The geometry is specified as a Screen Type with the following types supported: Immersive Room, Cylinder and Dome.
Note than the screen dimensions should reflect the the area covered by the projection system.
The Screen starts with a text box entry specifying the Eye position. It is followed by a dropdown menu used to specify the Screen Type - Immersive Room, Cylinder, and Dome. The Show Screens checkbox shows the dimensions of individual screens.
Immersive Room
Create a box with specified Width Left/Right, Depth Front/Back, and Height Top/Bottom.
The Left-Front-Right-Back-Top-Bottom radio buttons enable the corresponding viewers in the scene. The coordinates of these viewers are automatically updated from the dimensions of the box.
Cylinder
Create a cylinder scene with a given Radius, Height, Angle Range, and Angle Offset. The Wall-Floor radio buttons enable the corresponding wall and disk viewers in the scene.
Again, the coordinates of the each screen are automatically updated from the cylinder combo parameters.
Dome
Create a cylinder scene with a given Radius, Height, Angle Range, and Angle Offset. The Wall-Floor radio buttons enable the corresponding wall and disk viewers in the scene.
Again, the coordinates of the each screen are automatically updated from the cylinder combo parameters.
Canvas
The Canvas tab displays a planar layout of the screens generated in the projection scene. Figures 2 and 3 illustrate examples of canvas layout for a box and a cylinder projection scene respectively.
Border Thickness specifies the thickness of the yellow canvas border. The canvas region is a composition of all screens in the projection scene with empty space in between. The canvas border is a axis aligned bounding box whose purpose is to give a visual cue of the canvas region.
Canvas Screen Size
[Name] [Screen Size], where name
Wall Screen Size
Floor Screen Size
Left Screen Size
Front Screen Size
Right Screen Size
Back Screen Size
Top Screen Size
Bottom Screen Size
Canvas
Projectors
Export
The output of Igloo Settings Tool is a camera settings configuration file, which can be used within the Igloo Software Suite. The following snippet contains an example of a camera settings file.
The generated configuration file can be further edited and used to model and validate the geometry of the projection scene.
It is composed by a top section section specifying the dimensions of the camera texture and the camera eye position. The viewers section contains a list of cameras in the scene.
<version>1</version>
<dimensions>
<width>6144.000000000</width>
<height>1024.000000000</height>
</dimensions>
<eye>
<X>0.000000000</X>
<Y>0.000000000</Y>
<Z>0.000000000</Z>
</eye>
<viewers>
<camera>
<type>Cylinder</type>
<roi>
<W>0.500000000</W>
<H>1.000000000</H>
<X>0.500000000</X>
<Y>0.000000000</Y>
</roi>
<radius>2.500000000</radius>
<height_lo>-1.100000024</height_lo>
<height_hi>1.100000024</height_hi>
<theta_lo>-180.000000000</theta_lo>
<theta_hi>180.000000000</theta_hi>
</camera>
<camera>
<type>Disk</type>
<roi>
<W>0.500000000</W>
<H>1.000000000</H>
<X>0.000000000</X>
<Y>0.000000000</Y>
</roi>
<pa>
<X>-2.500000000</X>
<Y>-2.500000000</Y>
<Z>-1.100000024</Z>
</pa>
<pb>
<X>2.500000000</X>
<Y>-2.500000000</Y>
<Z>-1.100000024</Z>
</pb>
<pc>
<X>-2.500000000</X>
<Y>2.500000000</Y>
<Z>-1.100000024</Z>
</pc>
<radius_lo>0.000000000</radius_lo>
<radius_hi>2.500000000</radius_hi>
<theta_lo>-180.000000000</theta_lo>
<theta_hi>180.000000000</theta_hi>
</camera>
</viewers>