Rotating line code

ladytrample

Hi there I have a code query. I am wanting to create a illustration out of lines that at one point are cemented and the other moveable (preferably all together). I have made small alterations to an existing code but this is not quite working. I would like the arm to do a full 360 rotation. I would like to be able to multiple lines that all follow the mouse together

Any suggestion or help is greatly appreciated!

float x, y;
float angle1 = 0.0;
float segLength = 100;

void setup() {
  size(700, 700);
  strokeWeight(10);
  stroke(200, 160);

  x = width * 0.5;
  y = height * 0.5;
}

void draw() {
  background(0);

  angle1 = (mouseX/float(width) - 0.0) * -PI;


  pushMatrix();
  segment(x, y, angle1); 
  popMatrix();
}

void segment(float x, float y, float a) {
  translate(x, y);
  rotate(a);
  line(0, 0, segLength, 0);
}

_vk

for the 360º just replace PI by TWO_PI. Or maybe a more trigonometric approach :)

    float x, y; 
    float angle1 = 0.0; 
    float segLength = 100;

    void setup() { 
      size(700, 700); 
      strokeWeight(10);
      stroke(200, 160); 


      x = width * 0.5; 
      y = height * 0.5;
    }

    void draw() { 
      background(0);

      angle1 = map(mouseX, 0, width, 0, TWO_PI);

      float ex = x + cos(angle1)* segLength;
      float ey = y + sin(angle1)* segLength;

      if (!mousePressed) {
        line(x, y, ex, ey);
      }
      else { 
          // several lines... in one way...
          for (float i = 0; i < 6; i += 0.7) {
          float nx = x+i*50;
          ex = nx + cos(angle1)* segLength;
          ey = y + sin(angle1)* segLength;
          line(nx, y, ex, ey);
        }
      }
    }

Not sure what you need for several lines, but click the mouse to see some. That's usually call for an OOP approach though... Also to paste code, ident 4 spaces each line, or paste/select/hit 'C' button, it will ident for you ;)