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Chapter 22. Video Cubes > Revealing the Logo in Stripes

Revealing the Logo in Stripes

Your video cube uses a company logo for its top and bottom sides, but the videos in the cube sides get the most exposure as the cube whirls and spins. To give the logo the attention it deserves, you'll put it in the spotlight near the end of the animation and fully reveal it as the cube explodes in the background. To do so, you'll create a unique reveal for the logo by animating a bunch of solids in the shape of vertical stripes. Then you'll use the solids as a track matte for the logo so only strips of the logo appear wherever a solid's invisible stripe appears:

Create a new composition named Line Wipe using the NTSC D1 Square Pix, 720×540 composition preset, with Duration 15;00 seconds.

Create a white (RGB: 255, 255, 255) Solid layer starting at time 0;00 in the Line Wipe Timeline, with Height 540 (the same as the Main comp) and Width 172.

With the Solid layer selected in the Timeline, press Enter or Return and type Square 1.

Duplicate the Solid layer nine times so you have ten copies total. The new layers are automatically renamed Square 2, Square 3, and so on (new in After Effects 6.5).


If you had duplicated the layer without first changing the layer name in the Timeline, the names of the new layers wouldn't be automatically renumbered as they are in the previous step. That's because the name you set in the Solid Footage Settings dialog is actually the Source Name, which appears in the Project window and the Timeline's Source Name column.

To change the width of the new Solid layers, select a layer in the Timeline and press Ctrl (Windows) or Command (Mac OS) and Shift+Y to open the Solid Footage Settings dialog. Set the Width of the new Solid layers as follows:

Square layers 10 and 9: 20

Square layers 8 and 7: 100

Square layers 6 and 5: 50

Square 4: 120

Square 3: 35

Square 2: 65

Select all the layers, and press P to display their Position properties.

Add a Position keyframe at time 0;00 to all the layers.

Deselect the layers, and scrub only the X value (the first value) of each layer's Position property so every layer is offscreen with some to the left and some to the right of the composition area. You want the value for each layer to be unique from the other layers so the solids come in seemingly randomly after you set their landing Position keyframe in the next step.

These are the Position values used for this chapter's finished project movie:

Square 10: -18, 270Square 5: 750, 270
Square 9: 740, 270Square 4: -68, 270
Square 8: -56, 270Square 3: -22, 270
Square 7: 776, 270Square 2: 752, 270
Square 6: -38, 270Square 1: 806, 270

Go to time 2;00, and change the X value of each layer's Position property so that the white blocks line up edge to edge (in no particular order) and fill the entire Comp window. Make sure you see nothing but white across the whole screen.

These are the Position values for the layers at time 2;00 in the chapter's finished project's movie:

Square 10: 562Square 5: 140
Square 9: 10Square 4: 492
Square 8: 670Square 3: 182
Square 7: 66Square 2: 230
Square 6: 596Square 1: 348

Choose Window > The Wiggler to display that palette.

Click the Position property name of the Square 1 layer, and set the following values in The Wiggler palette:

Apply to: Spatial Path

Noise Type: Jagged

Dimension: One Dimension X

Frequency: 5

Magnitude: 500

If you play back the animation, that block moves more frenetically across the screen.

Select the Position property name of the next layer in the Timeline, and click Apply in The Wiggler palette.

Repeat step 12 for the rest of the Solid layers.

The Solid layers slide in horizontally to fill the composition with white color.



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