Configuring Projections

The number of control points along the horizontal and vertical axes of the grid. A 2 x 2 grid is used by default.

Visual editor enables you to set up warping for the selected projection using control points and yellow handles. These handles are displayed for each selected control point depending on its type.

You can select control points by clicking the mouse, and also switch between them using arrow keys.

Multi-selection using the mouse is performed as a common selection of multiple objects; to add or remove points from the selected group, click on them holding the Ctrl key. Multi-selection using the keyboard is possible in a chain-like way using arrow keys with the Shift key pressed.

The Ctrl + Z / Ctrl + Y combinations are used for the Undo / Redo actions. Shift + Ctrl + Z cancels all transformations.

• Drag control points and their yellow handles to warp the projection and adjust it for the required configuration. You can also move points using arrow keys with the Ctrl key pressed.

  

  You can see an example of a warped grid and a corresponding projection image below.

  

  Warped grid

  

  Warped image

• You can fine-tune projection warping by adjusting the parameters of each control point by selecting it and changing parameters via the following panel next to grid resolution settings:

  

  The following parameters are available:

  • Point — horizontal and vertical indices of the selected control point. Enumeration starts from the bottom left corner.

  • Position — coordinates of the selected control point along the X and Y axes.

    

    Coordinates for control points

  • Type — warping type for the selected control point:

    • — automatic linear interpolation (no control handles available)
    • — symmetric control handles for smooth curves
    • — asymmetric control handles (you can control each handle independently)
    • — automatic smooth curve (no control handles available)

The grid itself can also be moved inside the view space:

• Middle Mouse Button for panning (dragging the grid vertically or horizontally)
• Mouse Scroll for zooming in and out
• button to undo all panning and zooming actions and make the grid fit the window

Configure the canvas for the selected projection: enable vertical and horizontal flipping.

Per-channel color multiplier to control the intensity of:

• Red
• Green
• Blue
• RGB at once

Settings that allow you to adjust the color balance per channel (as well as for all channels at once):

• Positive values are added to the color values on the screen.
• Negative values are subtracted from color values on the screen.

Manages blending in the selected area. The screen-space blend area is not affected by warping.

To select the area, click Add to start creating the blending area, and in the grid, click to define one side of the area, then click to define the other side — the green line will appear. The third click shows the blending direction.

The area of the screen-space blend area is divided into two parts: the part between the blue and green lines is a solid-black area (i.e. the projected image is not displayed at all), and the part between the green and red lines is a gradient area (i.e. the projected image gradually becomes transparent).

In plain words, if you have two projectors, the green line of the blend zone in one projection should coincide with the red line of the blend zone in the other projection. For more than two projectors, the area between blue and green lines is used.

By default, each of these lines has two points marking the line limits. Using Resolution, you can increase the number of points along each line to adjust it as required by moving the points. Multi-selection of points is available.

Every blend area is adjusted using the following settings:

• Enabled — if toggled on, enables the use of the blend area selected from the list.
• Link to Projection — if toggled on, allows adjusting Alpha, Contrast, and Gamma for two blends simultaneously for better neighboring of two projections. Select the projection and the blend area from the drop-down lists and adjust the necessary parameters.
• Name — the window to modify the blend area name.
• Alpha — transparency of the whole blended area.
• Contrast — contrast of the gradient part of the blended area.
• Gamma — gamma correction value.