Pattern Animation

This project is the continuous version of the ST. Colorazation works.

Since i was interested in making musicbar in the ST.Colorazation,
i thought it would be very fun to create fake wave form that is produced by applitude.

Here is how Sin wave works.

which describes a wavelike function of time ( t ) with :

peak deviation from center = A (aka amplitude )
angular frequency ω, ( radians per second)
phase = θ

After this formula can be used in the i could make sin wave like this:
if ( t >= sin ( s * $frequency) )* $amplitude

Since Sin Wave has very uniform wave, it was very not interesting.
so i tryed to find a way to produce interesting wave form just by using sin wave.

i added some parameters to the shader to give some more flexiblity.

surface waves(float Kfb = 1,

　　　　　　　　　phase = 0.1,
　　　　　　　　　posamp = 0.5,
　　　　　　　　　splace = 0.5,
　　　　　　　　　freq = 50;)

{

color surfcolor = (0.0,0.0,0.0);

if(t < ((sin((s+phase)*freq)*posamp)+splace))
{
surfcolor = color(0.4,1.0,1.0);
}

if(t < (((sin((s+phase)*freq)*posamp)+splace))-0.05)
{
surfcolor = color(0.0,0.0,0.0);
}

After i made parameter and gave it little more interesting than before,
i wanted to make the wave have random value for each wave.
but when i tryed to make that, the random value have applied to every single micro polygon
so it broke the wave and resulted micro polygod with color all over the place.

i had to find new way to solve this problem.

now i solve the way by adding many sin wave formula to each other to creat multiple different sin wave.
it could be also controllabe, therefore i could assign value to each wave to create look as if i had random value.

here is the script for this wave.sl.

the movie file for the multi_wave:

after the it was done, i had full control and the wave looked very nice.
i used this shader to create mTV network ID.
Even though there were so many polys that was animated with the shaders,
it rendered very fast and efficiently.

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