Alpha Shapes (maschera)

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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:

Alpha Shapes Mask (this effect) –> zero or more effects (e.g. Blur, Cartoon) –> Mask Apply [–> more effects if needed]

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.