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<TITLE>Tao User Manual -- Emergent behaviour (diffraction) - diffraction.tao</TITLE>
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<H2>Emergent behaviour (diffraction) - diffraction.tao</H2>
This script creates two rectangular sheets and joins them together using
the Join statement. The boundary between the two sheets is then
locked in several places leaving a few `slots' where the waves can get through.
A short impulse is applied to one of the sheets named verb|source|
and the resulting wave fronts interfere after having passed through the
slots to form diffraction patterns.
<P><PRE>
Audio rate: 44100;
Rectangle source(150 Hz, 300 Hz, 20 secs);
Rectangle dest(150 Hz, 300 Hz, 20 secs);
Init:
source.lockCorners();
dest.lockCorners();
source.lock(0.000000, 0.050000, top, top);
source.lock(0.070000, 0.120000, top, top);
source.lock(0.140000, 0.190000, top, top);
source.lock(0.210000, 0.260000, top, top);
source.lock(0.280000, 0.330000, top, top);
source.lock(0.350000, 0.400000, top, top);
source.lock(0.420000, 0.470000, top, top);
source.lock(0.490000, 0.540000, top, top);
source.lock(0.560000, 0.610000, top, top);
source.lock(0.630000, 0.680000, top, top);
source.lock(0.700000, 0.750000, top, top);
source.lock(0.770000, 0.820000, top, top);
source.lock(0.840000, 0.890000, top, top);
source.lock(0.910000, 0.960000, top, top);
source.lock(0.980000, 1.000000, top, top);
Join source(centre, top) to dest(centre, bottom);
dest.setMagnification(5.0);
...
Score 5 secs:
At 0 secs for 0.1 msecs:
source(0.5,bottom).applyForce(50);
...
...
</PRE>
<P>
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<tr><td colspan="3" class="addr"><!-- bottom panel --><ADDRESS><FONT SIZE=-1>©1999,2000 Mark Pearson
<A HREF="mailto:m.pearson@ukonline.co.uk">m.pearson@ukonline.co.uk</A> April 30, 2000</ADDRESS><BR></td></tr><!-- end bottom panel --></table></BODY></HTML>
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