Alpha Shapes (maschera)¶
Descrizione
This effect essentially works like the Alpha Shapes effect but takes a snapshot of the frame before it draws simple shapes into the alpha channel. Use it together with the Applica maschera effect that uses a transition to composite the current frame’s image over the snapshot. The typical use case is to add effects in the following sequence:
Parametri
Parametro |
Valore |
Descrizione |
---|---|---|
Forma |
Selezione |
Controls the shape of the area of opacity that the effect will create. |
Operazione |
Selezione |
Defines what is to happen when you have more than one alpha effect on the clip |
Posizione X / Y |
Intero |
Definisce la posizione della forma nello schermo. L’intervallo dei valori va da 0 a 1000, dove 500 definisce il centro delle schermo. |
Dimensione X / Y |
Intero |
Definisce la dimensione della forma. L’intervallo dei valori va da 0 a 1000, dove 500 definisce il 100%, |
Inclinazione |
Intero |
Controls the angle the shape appears on the screen. The units are in 1000ths of a full rotation. For example, a value of 250 is one quarter of a circle turn and 500 is a 180-degree turn. That means, 1000 tilt units = 360 degrees. |
Larghezza della transizione |
Intero |
Defines the width of a border on the shape where the transparency grades from the inside to the outside of the shape. Can be used for feathering or creating a frame. |
Min |
Intero |
|
Max |
Intero |
Sono disponibili le seguenti voci di selezione:
Forma
Rettangolo |
Disegna un rettangolo |
Ellisse |
Disegna un’ellisse/un cerchio |
Triangolo |
Disegna un triangolo |
Diamante |
Disegna un diamante |
Operazione
Write on clear |
Existing alpha mask is overwritten |
Max |
Take the maximum between the existing alpha mask and the mask generated by this filter |
Min |
Take the minimum between existing alpha mask and mask generated by this filter |
Aggiungi |
Add the existing alpha mask and the mask generated by this filter |
Sottrai |
Subtract from the existing alpha mask the mask generated by this filter |
Note
Vedi anche
Alpha Shapes effect for more details and examples for the various shapes and operations.