//Stereogram test #1
//(C) 2004 Haruka Kataoka

//phase
float phase;
float vp = 0.1;

void setup() {
  size(300,200);
  phase = 0.0;
  framerate(30);
  stroke(127,127,255);
  fill(127,127,255);
}

void loop() {
  background(255,255,255);
  display(phase);
  phase += vp;
}

//表示
void display(float phase) {
  int lt = 75, rt = 225; //左画面と右画面の中心軸
  int b = 5; //四角の大きさ
  int x = (int)(cos(phase) * 50); //左右の位置
  int z = (int)(sin(phase) * 8); //飛び出し具合
  float zm = 1.0+(sin(phase) / 3.0); //四角の大きさのズーム率
  
  //clockwise
  rect(lt+x-b+z,  10-b, 2*b, 2*b);
  rect(rt+x-b-z,  10-b, 2*b, 2*b);
  //on plane
  rect(lt+x-b  ,  40-b, 2*b, 2*b);
  rect(rt+x-b  ,  40-b, 2*b, 2*b);
  //counter
  rect(lt+x-b-z,  70-b, 2*b, 2*b);
  rect(rt+x-b+z,  70-b, 2*b, 2*b);
  //zoomed
  b = (int)(zm * (float)b);
  //zoomed: on plane
  rect(lt+x-b  , 100-b, 2*b, 2*b);
  rect(rt+x-b  , 100-b, 2*b, 2*b);
  //zoomed: clockwise
  rect(lt+x-b+z, 130-b, 2*b, 2*b);
  rect(rt+x-b-z, 130-b, 2*b, 2*b);
  //zoomed: counter
  rect(lt+x-b-z, 170-b, 2*b, 2*b);
  rect(rt+x-b+z, 170-b, 2*b, 2*b);
}