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int xspacing = 32; // How far apart should each horizontal location be spaced | |
int w; // Width of entire wave | |
float theta = 0.0; // Start angle at 0 | |
float amplitude = 150.0; // Height of wave | |
float period = 500.0; // How many pixels before the wave repeats | |
float dx; // Value for incrementing X, a function of period and xspacing | |
float[] yvalues; // Using an array to store height values for the wave | |
void setup() { | |
size(1000, 1000); | |
w = width+250; | |
dx = (TWO_PI / period) * xspacing; | |
yvalues = new float[w/xspacing]; | |
strokeWeight(10); | |
} | |
void draw() { | |
background(0); | |
calcWave(); | |
renderWave(); | |
} | |
void calcWave() { | |
// Increment theta (try different values for 'angular velocity' here | |
theta += 0.02; | |
// For every x value, calculate a y value with sine function | |
float x = theta; | |
for (int i = 0; i < yvalues.length; i++) { | |
yvalues[i] = sin(x)*amplitude; | |
x+=dx; | |
} | |
} | |
void renderWave() { | |
noStroke(); | |
fill(255); | |
stroke(255); | |
strokeCap(SQUARE); | |
// A simple way to draw the wave with an ellipse at each location | |
for (int x = 0; x < yvalues.length; x++) { | |
// ellipse(x*xspacing-250, height/2+yvalues[x], 16, 16); | |
// ellipse(x*xspacing, (height/2+yvalues[x]), 16, 16); | |
ellipse(height/2+yvalues[x], x*xspacing-256, 16, 16); | |
ellipse(height/2+yvalues[x], x*xspacing, 16, 16); | |
// line(height/2+yvalues[x], x*xspacing, height/2+1, x*xspacing); | |
// line(height/2+yvalues[x], x*xspacing-256, height/2-1, x*xspacing-256); | |
// line(height/2+yvalues[x], x*xspacing-256, height/2+sin(dx)*amplitude, (x+1)*xspacing-256); | |
} | |
} |
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