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Processing – Random Bursts

staticcircle1 staticcircle2 staticcircle3staticcircle4

/**
 * Visualize: Superformula [Messed up by...]
 * from Form+Code in Design, Art, and Architecture
 * by Casey Reas, Chandler McWilliams, and LUST
 * Princeton Architectural Press, 2010
 * ISBN 9781568989372
 *
 * This code was written for Processing 1.2+
 * Get Processing at http://www.processing.org/download
 */
float scaler = 200;
int m = 2;
float n1 = 18;
float n2 = 1;
float n3 = 1;
void setup() {
size(1280, 720);
smooth();
noFill();
stroke(255);
}
void draw() {
background(0);
pushMatrix();
translate(width/2, height/2);
float newscaler = scaler;
for (int s = 16; s > 0; s--) {
beginShape();
float mm = (millis()/2) + s;
float nn1 = n1 + s;
float nn2 = random(255) + s;
float nn3 = random(200) + s;
newscaler = newscaler * 0.98;
float sscaler = newscaler;
PVector[] points = superformula(mm, nn1, nn2, nn3);
curveVertex(points[points.length-1].x * sscaler, points[points.length-1].y * sscaler);
for (int i = 0;i < points.length; i++) {
curveVertex(points[i].x * sscaler, points[i].y * sscaler);
}
curveVertex(points[0].x * sscaler, points[0].y * sscaler);
endShape();
}
popMatrix();
}
PVector[] superformula(float m,float n1,float n2,float n3) {
int numPoints = 360;
float phi = TWO_PI / numPoints;
PVector[] points = new PVector[numPoints+1];
for (int i = 0;i <= numPoints;i++) {
points[i] = superformulaPoint(m,n1,n2,n3,phi * i);
}
return points;
}
PVector superformulaPoint(float m,float n1,float n2,float n3,float phi) {
float r;
float t1,t2;
float a=1,b=1;
float x = 0;
float y = 0;
t1 = cos(m * phi / 4) / a;
t1 = abs(t1);
t1 = pow(t1,n2);
t2 = sin(m * phi / 4) / b;
t2 = abs(t2);
t2 = pow(t2,n3);
r = pow(t1+t2,1/n1);
if (abs(r) == 0) {
x = 0;
y = 0;
}
else {
r = 1 / r;
x = r * cos(phi);
y = r * sin(phi);
}
return new PVector(x, y);
}
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