Question

I have a program which essential makes a triangular spiral. Does anyone know how I can change this program to rather have one entire line makes the spiral, have it made from straight line segments? The following is the code i have thus far…

void setup(){
  int len=100;
  int startx =250;
  int starty= 250;
  float angle = PI;
  size (500,500);
  spiral_triangle(len, startx,starty,angle);

}

void spiral_triangle(int len, int startx, int starty, float angle){

   if (len>1) 
        {line( startx, starty ,int(startx+len*cos(angle)),int(starty + len*sin(angle))  );
        int new_startx = int(startx+len*cos(angle));
        int new_starty = int(starty+len*sin(angle));
        int new_len = len -10;
        float new_angle = angle + PI/1.5;
        spiral_triangle(new_len, new_startx,new_starty,new_angle);
        } 
}

Example… Instead of one line per side, i need this ——– per side… Individual line segments (kinda like a dotted line, or a broken line)

Answer 1

If I understand you correctly, you want a circular spiral instead of a triangular spiral. The following code should achieve this.

void spiral_triangle(float len, int startx, int starty, float angle){
   if (len>1) {
      float new_len = len - 0.1;
      float new_angle = angle + PI/100;
      int oldx = int(startx+len*cos(angle));
      int oldy = int(starty+len*sin(angle));
      int newx = int(startx+new_len*cos(new_angle));
      int newy = int(starty+new_len*sin(new_angle));
      line( oldx,oldy,newx,newy);   
      spiral_triangle(new_len, startx,starty,new_angle);
   } 
}