• fullscreen
• SineWave.pde
•
int xspacing =8;   // How far apart should each horizontal location be spaced
int yspacing=8;
int w;              // Width of entire wave

float theta = 90.0f;       // Start angle at 0
float amplitude = 150.0f;  // Height of wave
float period = 1000.0f;    // How many pixels before the wave repeats
float dx;                 // Value for incrementing X, to be calculated as a function of period and xspacing
float[] yvalues;          // Using an array to store height values for the wave (not entirely necessary)
float[] xvalues;
float dy;

void setup() {
size(600,600);
frameRate(30);
colorMode(HSB);
smooth();
w = width+20;
dx = (TWO_PI / period) * xspacing;
dy = ((TWO_PI / period) * yspacing);
yvalues = new float[w/xspacing];
xvalues= new float[w/yspacing];
println(yvalues.length);
println(xvalues.length);

}

void draw() {
//background(0);
fill(255,10);
rect(0,0,width,height);
calcWave();
renderWave();

}

void calcWave() {
// Increment theta (try different values for 'angular velocity' here
theta += 0.005;

// For every x value, calculate a y value with sine function
float x = theta;
float y = theta;

for (int i = 0; i < yvalues.length; i++) {
for (int l=0; l< xvalues.length; l++){
yvalues[i] = cos(x)*amplitude;
xvalues[l]= cos(y)*amplitude;
x+=dx;
y+=dy;
}
}
}

void renderWave() {
// A simple way to draw the wave with an ellipse at each location

for (int x = 0; x < yvalues.length; x++) {

stroke( x, 255, 255, 50 );
fill( yvalues[x], 255, 255, 1 );
strokeWeight(1);   // Default
ellipseMode(CENTER);
ellipse(x*xspacing,width/2+yvalues[x],yvalues[(x*3)%77],yvalues[(x*3)%77]);
}

}

### tweaks (0)

This sketch is running as Java applet, exported from Processing.