viernes, 22 de junio de 2007

Flash 8: interpolaciones de movimientos

Lord Zorel: Flash 8: primera animación, p2

Las interpolaciones de movimiento, no sólo nos permiten realizar desplazamientos en forma recta, sino que también siguiendo una curva que nosotros dibujamos, realizar giros, cambiar los tamaños o deformar símbolos achicandolos o estirándolos. También permiten, aplicar filtros de forma progresiva, ya sea éste un efecto de desvanecimiento, un sombreado, un cambio de color (aplicar tinta), un desenfoque, un bisel o todos juntos.

Interpolación guiada

Para hacer que una interpolación, se realice a través de una guía de movimiento, es necesario ir a la capa donde se encuentra la animación y añadir una guía de movimiento (con el botón derecho).
En la capa de la guía de movimiento, dibujamos la guía por la cual queremos que se mueva nuestra animación, de esta forma nuestro símbolo se moverá a través de esa línea o curva que hayamos dibujado. Luego de dibujarla, debemos fijar el centro del símbolo (una pelotita que aparece cuando lo seleccionamos), al comienzo de la linea, en el primer fotograma y luego, hacer lo mismo en el fotograma clave siguiente. De esta manera, podemos crear algo así.









pero así como podemos, pedirle que se guié a través de un trazado, podemos pedirle que gire a través de este, o que aumente su velocidad, mientras este se realiza la animacion como muestra el siguiente ejemplo









¿Cómo se hace?

Para hacer esto, es necesario arreglar las propiedades de los fotogramas con interpolación, en la parte baja del área de trabajo de flash




para lograr un efecto de aceleración y desaceleración , como en el caso de la hormiguita, puede que sea necesario realizar varias interpolaciones, en las que se intercambien los valores de la aceleración




¿Cómo deformar símbolos?


aplicarle una deformación a un símbolo, por medio de una interpolación de movimiento, puede ser muy fácil, ya que con solo aplicar la deformación en el fotograma clave de la interpolación, flash se encargara automáticamente de deformar el símbolo.

Algunos ejemplos:


¿desordenado, no?
XD, me recuerda a un capitulo de Lhomero os Simpson, en el que creá una pagina web, con puras imagenes como estas.

Bueno, para deformar los objetos, basta apretar la herramienta, transformación libre , para comenzar a deformar los símbolos y cambiar su centro, (un punto blanco que aparece en los símbolos, que se usa para anclar los símbolos con las guías de movimiento).
Puedes ayudarte con las siguientes opciones de esta herramienta para facilitar tu trabajo:

Rotar y sesgar: te permite girar la imagen y también "ladear" la imagen.


Escalar: con esta opción, puedes agrandar o achicar los objetos, sin que estos pierdan las proporciones, es decir, cambien de forma

Distorsionar: esta opción te permite distorsionar los objetos, tomándolos de sus esquinas o lados
Envoltura: permite realizar distorsiones de forma mas curva, permitiendo crear extraordinarios efectos, como el siguiente


Lamentablemente, ni distorsionar ni envoltura, son aplicables a símbolos y por ello a interpolaciones de movimiento, pero si a interpolaciones de forma.


¿Cómo Aplicar Filtros?


Los filtros se aplican a una interpolación de movimiento, basta transformar los símbolo en clip de película, en el primer y en el ultimo fotograma de la interpolación, y luego aplicar los filtros sobre los clip de películas.
Por ejemplo si queremos que un símbolo desvanezca, creamos una interpolación de movimiento y al ultimo fotograma le aplicamos un filtro, en especifico, Alfa = 0%, de esta forma el simbolo desaparecera suavemente.



Eso ha sido todo, respecto a interpolación de movimiento, luego seguiremos con mas, respecto a la interpolación de forma.

Consejo

Al principio no es fácil, si es necesario ocupar 100 capas, con 100 interpolaciones para animar un objeto, hazlo.
(luego veras, como se hace mucho mas fácil)



He creado un archivo donde se pude ver como utilizar la animación de movimiento para realizar un dibujo animado como este:







Para descargarlo haz clic aquí

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