Fundamentals of 3D Space - Flash 3D: Animation, Interactivity, and Games - page 205

Tip 1: Starting from 6_5_xzRotation3_DONE.fla as you did in this exercise, repeat
Step 1 and then make similar changes in the x-direction for Steps 2-4 to get a spiral
that rotates about the x-axis. Open yzSpiralRotation.swf as a reference for what
you'll get (see Figure 6.32).

Tip 2: For a very different organic effect, open your 6_7_xzSpiralRotation_DONE.fla
file and first comment out line 37 as shown.

36
37
38
39
40

// put it on the circle
// thisObj.x = xc + r * Math.cos(a);
thisObj.y = yc + r * Math.cos(a/4);
thisObj.z = zc + r * Math.sin(a)/2;

Then set the x - coordinate of the objects to be equally spaced when being created.
Open yzRotation2.swf to see the effect (Figure 6.33).

// create the objects for the circular motion
for (var i:Number = 0; i < numberOfObjects; i++)
{
object_mc.duplicateMovieClip("object"+i, i);
this["object"+i].gotoAndStop(i+2);
this["object"+i].x = i* 75 - 260;
}

22
23
24
25
26
27
28

Figure 6.32 Tip 1 output Figure 6.33 Tip 2 output