Clip Alpha

Quick Reference to Scripting Command
a=CLIPALPHA(ASSIGN AS SOURCE, DISPLAY CLIP, REPLACE IMAGE)
Items in CAPS are 0/1 switches or switches with more options than 0/1.

The Clip Alpha operation allows you to clip out a section of an image's alpha channel.

This alpha channel will then become a regular image. This tool is mainly used to perform alterations and effect on an alpha channel. This alpha channel image can then be returned as the alpha channel for the original image using the Make Alpha control. This process of altering an alpha channel can also be done by using the Alpha Channel controls in the Settings menu.

Clip Alpha Operation Dialog

Clip Alpha Controls

Trends

Some of the controls have a Trend button next to them. These trend buttons allow you to set variables over a series of frames. Each frame of any animation may be thought of as a slice of time. The trends allow you to alter some, all, or none of the variables for a particular time slice. Trend graphs have equidistantly spaced vertical lines. For animations under 100 frames in length, each of these lines represents a frame in the animation. The number of frames in any one sequence can be altered using the Sequence controls item from the Timeline pull down menu. Animation lengths of 100 - 999 frames will be represented with a vertical bar being 10 frames, and animation length greater than 1000 frames will have a vertical bar for every 100 frames. Click here to view more information on Trends.

Assign the Result as Source

This control, when selected, will make the alpha channel clip the source image. This allows you top alter the alpha channel, and then return it to the original image using the Make Alpha option of Mask with Source Luminance. Alpha channels can also be modified using the Alpha Channel controls in the Settings menu.

WinImages F/x Manual Version 7, Revision 5, Level B