Scalable

Follow the steps below to configure Scalable Panel Assembly for Corner Caves. 

Display Clients

• •  Select Use Remote Display Clients and check Apply Warp & Blend in Graphics Driver, making sure that the Assigned Display Client on the right side of your screen is green. If it is not green, left-click the Assigned Display Client and click Remove, and Scalable will update the display client.

Projectors

• • Make sure the Rows and Columns on the right side of the screen match up to the physical layout of your projectors. In this example we are using a corner cave with 2 walls, so you would choose 1 Row and 2 Columns. Make sure that both projectors in the middle are Enabled.

For a corner cave, we skip Pan-Tilt Connections and Cameras.

Screens

• 1. Select CAVE and uncheck Camera Calibrate Single Projector Panels. 

  2. On the right side of your screen, check the correct panels in relation to the physical layout of your projectors. In this example we are using a front wall and a right wall, so you would check Front Number of Projectors and Right Number of Projectors. 

  3. For the screen dimensions, you need to measure the dimensions of both screens using meters as your units. For Width, measure the Front screen's (#1) width. For Height, measure either screen's height, making sure both screens should have the same height. For Depth, measure the Right screen's (#2) width. 

For a corner cave, we skip Data Collection.

Image Boundary

• 1. Select Panel 1 and start with any corner, clicking and dragging the circle until it reaches the corresponding corner of the projection on the wall. You can worry about fine tuning it after you get all four corners roughly where the edge of the projections are.

• 1. With all 4 corners almost at the edges of the screen, you can click on each circle and using the arrow keys on your keyboard to do smaller, incremental adjustments until the edges of the grid match up with the edges of the projection. 

• 1. With Panel 1 done, you can move on to Panel 2 and repeat step B, making sure you line up the lines in the grids in the corner where both screens meet. 

Management

• • Click Engage to engage your calibration. If it doesn't look correct, click Disengage. 

Adjusting Overlaps to Correct Image Compression 

If two projectors have a larger overlap, the image may sometimes look compresssed on one axis, either horizontally (more likely) or vertically.

To correct an error of squishing due to overlapping images, please follow these steps:

1. Go to the Scalable dropdown menu in the upper left corner and select Support. Then click on Advanced Options. 

2. In the advanced options panel, click the Add button in the upper left corner

3. Type in UseRemoteOverlaps, set the function type to Bool, and set the value to True

4. Add a second function, and type RemoteOverlapX, and enter the value of the overlap in pixels. In this example, the width of the overlap between the two projectors is 146 inches which correlates to 1046 pixels

To find the size of an x-overlap in pixels, go to the projector tab, which will display the boundaries of both projectors on the display panel. On a left to right layout with two projectors, there will be two red lines (the left boundary of each projector) and two green lines (the right boundary of each projector).

First, measure the width of one of your displays. Going left to right, measure from the first red line to the first green line or from the second red line to the second green line and divide the number of horizontal pixels of that projector by that width. This will give you the number of pixels per unit of measurement, in the horizontal plane. Then, measure the width of the overlap, by measuring from the first red line to the second green line. Then, in the same units as used for the projector width, multiply the overlap width by the number of pixels per unit.

In this example, each projector display is 266 inches wide and the overlap is 145 inches wide. The projectors are set at a resolution of 1920x1080, so we first divide 1920 by 266 to get 7.218 pixels per inch. We then multiply that by 145, which tells us that the overlap is 1046 pixels wide. This is the number that should be entered into the RemoteOverlapX function.

A RemoteOverlapX adjustment will change a horizontal overlap, while using RemoteOverlapY will adjust any vertical overlaps.

**System Restart

If the system gets restarted, sometimes you lose the 3D effect when running quad buffer.

To re-establish the stereo display, please follow the procedure order below:

1. restart the system

2. open Scalable and make sure it is disengaged (a lot of time, it will show as engaged in the management panel even if the screens do not look like they are engaged)

2. Re-do Mosaic steps

3. Engaged Scalable

4. Check the synchronize setting in the nvidia panel.