Screen Tab

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 that the screen dimensions should reflect the area covered by the projection screen only.

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. The Show Screens checkbox shows the dimensions of individual screens.

Note that the test pattern displayed to represent the screen type consists of 6 faces of a cube mapped on to the geometry of the screen. Each face is labelled with front, back, left, right, top or bottom and contains an igloo logo together with a grid pattern and solid circles in each corner.

Immersive Room

Create a box with specified Width (distance between Left screen and Right screen), Depth (distance between Front screen and Back screen), and Height (distance between Top screen and Bottom screen).

The Screens listbox enables the corresponding views (Left-Front-Right-Back-Top-Bottom) in the scene. The coordinates of these views are automatically updated from the dimensions of the box.

Cylinder

Create a cylinder scene with a given Radius (radius of the circle at the base of the cylinder), Height (distance from the base to the top of the cylinder), Angle Range (number of degrees in the circle e.g. 360 for complete closed cylinder) and Angle Offset (number of degrees to rotate the test pattern about the vertical axis).

The Wall-Floor items in the Screens listbox enable the corresponding wall and disk (floor) views in the scene. The coordinates of each screen are automatically updated from the cylinder parameters.

Dome

Create a dome scene with a given Radius (radius of the circle at the base of the dome), Angle Range (number of degrees in the circle e.g. 360 for complete closed dome) and Angle Offset (number of degrees to rotate the test pattern about the vertical axis).

The dome is modelled as a hemisphere and can be adjusted using the Lower Pitch and Upper Pitch parameters. Typically, an Igloo dome will use a front-facing projector setup with the projectors located at the top of the dome. In this case, the Upper Pitch value of 90 should be reduced so that the non-projected area where the projectors are located is defined. The Lower Pitch value of 0, represents the equator of the sphere. Adjusting this parameter allows for domes which have a bottom edge above or below the line of the sphere’s equator.

The coordinates of each screen are automatically updated from the dome parameters.