void pent(float r)
{
  beginShape();
  vertex(0, r);
  vertex(r*0.951056516f, r*0.309016994f);
  vertex(r*0.587785252f, r*-0.809016994f);
  vertex(r*-0.587785252f, r*-0.809016994f);
  vertex(r*-0.951056516f, r*0.309016994f);
  endShape(CLOSE);
}

void pent(float r, float x, float y)
{
  beginShape();
  vertex(x, y+r);
  vertex(x+r*0.951056516f, y+r*0.309016994f);
  vertex(x+r*0.587785252f, y+r*-0.809016994f);
  vertex(x+r*-0.587785252f, y+r*-0.809016994f);
  vertex(x+r*-0.951056516f, y+r*0.309016994f);
  endShape(CLOSE);
}  

void sept(float r)
{
  beginShape();
  vertex(r*-0.98f, r*-0.198997487f);
  vertex(r*-0.45f, r*-0.893028554f);
  vertex(r*0.45f, r*-0.893028554f);
  vertex(r*0.98f, r*-0.198997487f);
  vertex(r*0.8f, r*0.6f);
  vertex(0, r);
  vertex(r*-0.8f, r*0.6f);
  endShape(CLOSE);
}

void diamond(float r)
{
  quad(-r, 0, 0, r, r, 0, 0, -r);
}

void diamond(float r, float x, float y)
{
  quad(x-r, y, x, y+r, x+r, y, x, y-r);
}

void cross(float r)
{
  line(-r, r, r, -r);
  line(-r, -r, r, r);
}