A VisualTrack generally composes its transformed base content on a background buffer provided by VisualTracks before it. If there is no input background buffer (first VisualTrack) only the transformed base content is given back. If there is no base content in the VisualTrack, the background buffer is transformed instead.
| Type | Name | Description | Default |
|---|---|---|---|
| ImageProvider | content | The content of this track | |
| int32 | numframes | Number of frames of this VisualTrack, if not specified, or < 0 it will provide content until the end of the scene | -1 |
| int32 | offset | offset to change the starting point of this VisualTrack relative to the start of the scene (negative values give undefined behaviour) | 0 |
| int32 | x | X offset for the compositing of background and layer content | 0 |
| int32 | y | Y offset for the compositing of background and layer content | 0 |
| bool | centerx | Center content on track horizontally | false |
| bool | centery | Center content on track vertically | false |
| Transformation [ ] | transformations | Array of Transformations, that are applied to either the content or the background | |
| BlendMode | blendmode | Blendmode for the compositing of content onto previous track | |
| double | opacity | Opacity to use for compositing | 1.0 |
| Function | opacityfunction | Animation function to control opacity | |
| double | adjustalpha | Compute correct destination alpha after compositing (to solve double composition problem) | false |
| bool | ignorelength | Ignore length (length will be computed by Audiotrack or set specifically or dynamically) | false |
| StringVariable | numframesvariable | Do not compute length from content, but take length from variable. | |
| string | name | ||
| StringVariable | enablevariable |
Blend modes as in Photoshop
| Enum | Value | Description |
|---|---|---|
| normal | 0 | |
| screen | 1 | |
| softlight | 2 | |
| hardlight | 3 | |
| overlay | 4 | |
| multiply | 5 |
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