Re: Rotating a Cubic and Controling the polygon opacity

To easily make the Cube, put a 200x200 Solid in the comp and apply these expressions:

TO Y ROTATION:
i = index - 1;
i * 90

TO ANCHOR POINT:
w = width / 2;
x = value[0];
y = value[1];
z = w;
[x, y, z]

*Duplicate that layer until you have the four sides of the cube. Add a camera, put it on the bottom of the layer stack, and move the camera so you can see that the layers make the cube.

Then make two more duplicates of your Solid, remove the Y ROTATION expressions and put these two expressions in for X ROTATION respectively:

LAYER 5:
i = index;
i * 270

LAYER 6:
i = index - 1;
i * 90

That's your cube. You can change the size of your solid and it will effect the whole cube.

As for the transparency issue ...

apply this expression to the Opacity of each of the solid layers

delta = toCompVec([0, 0, 1])[2];
linear(delta, 600, 1500, 10, 65)

This whole thing obviously works best if you are using squares to build the object.

Cheers,
Trent

Trent Armstrong - Creative Cow Leader
http://www.dallasaeug.com