how can i control and program a wave
in
Programming Questions
•
1 year ago
Hello, i am very new to processing. i have a current sketch that is a basic motion sin wave, set a constant rate. instead of the sin function, i need a custom one so i can control certain lengths of the wave at certain points, i have attached an image to explain what i am trying to do, and here is the sin wave sketch i am currently using.
ultimately i want to able to change x1, x2, x3 using the controlP5 library during the sketch, but i have no idea how to program the wave function.
int xspacing = 8;
int w;
float theta = 0.0; // Start angle at 0
float amplitude = 75.0; // 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(200,200);
frameRate(30);
colorMode(RGB,255,255,255,100);
smooth();
w = width+16;
dx = (TWO_PI / period) * xspacing;
yvalues = new float[w/xspacing];
}void draw() {
background(0);
calcWave();
renderWave();
}
void calcWave() {
// Increment theta
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() {
// A simple way to draw the wave with an ellipse at each location
for (int x = 0; x < yvalues.length; x++) {
noStroke();
fill(255,50);
ellipseMode(CENTER);
ellipse(x*xspacing,width/2+yvalues[x],16,16);
}
}
Thank you in advance if you can help me!
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