Concept: The mask is rotated using rotate command of Adobe Flash software which is activated when we create a motion tween. This command is found in the property bar and we get clockwise and counter clockwise options. Try to use different types of shapes and rotate them using motion tween. Please remember that rotate command will not be activated until and unless you convert the shape into symbol and apply motion tween to it.
1. You need to set the stage of the
image size. We have taken the following image for the Rotating Light
masking effect.
2. Open flash and create a new file.
3. Import image to stage.
File > Import > Import to Stage
4. Fit the image on the stage using Align command
if you want to do this with precision. This goes as follows.
Modify > Align > Left
Modify > Align >Top
and then,
Modify > Document > Select Contents in
the Match
Insert frame on 60.
5. Rename the image layer to Image. Lock the image
layer.
6. Add one layer. Name it as Mask. Select it and draw
the star using Polystar Tool at the center of the image with no
stroke. No need to be specific for center. Use Option in the property
to draw different type of star. You can use any color for fill.
7. Select star and convert to symbol using F8. Select
Graphics for option type and name it as star.
8. Select Mask layer. Insert Keyframe on 60th frame.
9. Select the first frame on the mask layer and change
the Tween property to Motion.
10. Select CW option in Rotate.
11. Right click on the mask layer and Select Mask.
12. Export movie using File
> Export > Export Movie