[JAVA3D] Alpha: Setting mode does not disable use of increasingAlphaDurati on

[J. Lee Dixon]

JDK 1.3, Java3D v1.2.1Beta1

In my code, I use the same Alpha for doing a simple 2 second up-ramp (0
to 1)...
        Alpha a = new Alpha(1, 2000);
This works fine.

... then later use the same object to do a simple 1.5sec down ramp (1 to
0)
        a.setDecreasingAlphaDuration(1500);
        a.setMode(Alpha.DECREASING_ENABLE);
        a.setStartTime(System.currentTimeMillis());

This should disable the "increasing" parameters, but it doesn't.  The
alpha lasts for 3.5 seconds, going from 1 to 0 every 1.5 seconds and
jumping to 0 after 3.5 seconds.  I've included a snapshot of a graph
showing the trend, and the code used to generate the bug data.

    WORKAROUND:
        a.setIncreasingAlphaDuration(0);

 <<graph.jpg>>  <<AlphaTest.java>>

J. Lee Dixon
SAIC - Celebration, FL
407-566-1438
[EMAIL PROTECTED]    AOL: LeeOrlando

graph.jpg

AlphaTest.java