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additiveWaves.pde
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additiveWaves.pde
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//# Additive Waves
//- original example by [Karsten Schmidt](http://postspectacular.com)
//- toxiclibs.js by [Kyle Phillips](http://haptic-data.com)
//AdditiveWaves demo is showing how to add 2 randomly chosen waveforms
//to create a 3D terrain. One wave is moving along the X axis and is mapped
//to the red color channel, the other is propagating along Y and is mapped to
//blue. In this demo each wave's frequency is modulated by a secondary wave
//(here hardcoded as sine wave). Three of the possible waveforms chosen have
//additional options/special behaviour:
//
//- `AMFMSineWave` also modulates the wave's overall amplitude on top of
//frequency modulation
//- `FMHarmonicSquareWave`'s shape can tweaked by adjusting the number of harmonics
//used (the higher the more square-like the wave becomes).
//- `ConstantWave` is simply representing a fixed value
//
//Available `toxi.math.waves.*` wave forms are:
//
//- `SineWave`, `FMSineWave`, `AMFMSineWave`
//- `FMTriangleWave`
//- `FMSawtoothWave`
//- `FMSquareWave`, `FMHarmonicSquareWave`
//- `ConstantWave`
//
//You can also create entirely new waveforms by subclassing the parent `toxi.math.waves.AbstractWave`
//type and overwriting the `update()` method.
/*
* Copyright (c) 2009 Karsten Schmidt
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* http://creativecommons.org/licenses/LGPL/2.1/
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
//move any toxiclibs classes down to local objects. Once you do that the sketch
//below will work cross-mode between Processing and Processing.js
var AbstractWave = toxi.math.waves.AbstractWave,
SineWave = toxi.math.waves.SineWave,
FMTriangleWave = toxi.math.waves.FMTriangleWave,
FMSawtoothWave = toxi.math.waves.FMSawtoothWave,
FMSquareWave = toxi.math.waves.FMSquareWave,
FMHarmonicSquareWave = toxi.math.waves.FMHarmonicSquareWave,
FMSineWave = toxi.math.waves.FMSineWave,
AMFMSineWave = toxi.math.waves.AMFMSineWave,
ConstantWave = toxi.math.waves.ConstantWave;
import toxi.math.waves.*;
import processing.opengl.*;
AbstractWave waveX,waveY;
int STEP = 25;
int DIM = 900;//800;
int D2 = DIM/2;
int AMP = 50;
void setup() {
size(940, 560, OPENGL);
noStroke();
waveX=createRandomWave();
waveY=createRandomWave();
textFont(createFont("Arial", 14));
}
void draw() {
background(0);
pushMatrix();
translate(width*0.5, height*0.4, 0);
rotateX(0.8);
rotateZ(mouseX*0.01);
scale(0.5);
float prevY = waveY.update();
float colPrevY = 0;
waveY.push();
for(int y = 0; y < DIM; y += STEP) {
float valueY = waveY.update();
float colY = valueY * 128 + 128;
waveX.push();
beginShape(TRIANGLE_STRIP);
for(int x = 0; x < DIM; x += STEP) {
float valueX = waveX.update();
float colX = valueX * 128 + 128;
fill(colX, 0, colPrevY);
vertex(x - D2, y - STEP - D2, (valueX + prevY) * AMP);
fill(colX, 0, colY);
vertex(x - D2, y - D2, (valueX + valueY) * AMP);
}
endShape();
waveX.pop();
prevY = valueY;
colPrevY = colY;
}
waveY.pop();
waveX.update();
waveY.update();
popMatrix();
fill(255);
text(waveX.getClass(), 20, 30);
text(waveY.getClass(), 20, 45);
}
void mousePressed() {
waveX=createRandomWave();
waveY=createRandomWave();
}
AbstractWave createRandomWave() {
AbstractWave w=null;
AbstractWave fmod = new SineWave(0, random(0.005, 0.02), random(0.1, 0.5), 0);
float freq=random(0.005, 0.05);
var r =(int)random(7);
console.log(r);
switch(r) {
case 0:
w = new FMTriangleWave(0, freq, 1, 0, fmod);
break;
case 1:
w = new FMSawtoothWave(0, freq, 1, 0, fmod);
break;
case 2:
w = new FMSquareWave(0, freq, 1, 0, fmod);
break;
case 3:
w = new FMHarmonicSquareWave(0, freq, 1, 0, fmod);
((FMHarmonicSquareWave)w).maxHarmonics=(int)random(3,30);
break;
case 4:
w = new FMSineWave(0, freq, 1, 0, fmod);
break;
case 5:
w = new AMFMSineWave(0, freq, 0, fmod, new SineWave(0, random(0.01,0.2), random(2, 3), 0));
break;
case 6:
w = new ConstantWave(random(-1,1));
break;
}
return w;
}