polar tri

polarTri.pde

void setup() {
  size(600, 600);
  fill(0);
  noStroke();
}

void polarVertex(float dist, float ang) {
  vertex(100*exp(dist)*cos(ang), 100*exp(dist)*sin(ang));
}

void polarLine(float dist1, float ang1, float dist2, float ang2) {
  for (int i=0; i<10; i++)
    polarVertex(map(i, 0, 10, dist1, dist2), map(i, 0, 10, ang1, ang2));
}

void draw() {
  background(250);
  pushMatrix();
  translate(width/2, height/2);
  for (int i=0; i<10; i++) {
    pushMatrix();
    rotate(TWO_PI*i/10);
    beginShape();
    polarLine(0, 0, -.4, PI/10);
    polarLine(-.4, PI/10, -.4, -PI/10);
    polarLine(-.4, -PI/10, 0, 0);
    endShape();
    popMatrix();
  }
  popMatrix();
}