!752

static BWImage bw;
static Thread producer;
static Reproducing rp;
static ImageSurface imageSurface;

!include #1004562 // column prediction

p {
  rp = new Reproducing;
  bw = loadBWImage("#1004541");
  //bw = makeTriangle();
  imageSurface = showBWImage(bw);
  rp.bw = bw;
  //rp.imageSurfaceToUpdateWithBest = showImage(bw.getBufferedImage());
  
  //rp.startProduction = r { produce() };
  //rp.search();
  
  //showColumnErrors("LookLeft(width=8)");
  
  produce();
  while licensed {
    S desc = grabFromQueue(rp.newProducts);
    Predictor p = makePredictor(desc);
    float[][] cols = rp.getCols();
    double score = testColumnRange(p, cols, 0, 15, l(cols));
    print(desc);
    print("  " + score);
    imageSurface.setImage(renderPrediction(desc, cols));
  }
}

static void produce() {
  cancelThread(producer);
  producer = new Thread(r {
    // STRATEGY!
    
    rp.push("RepeatColumn");
    rp.push("ShiftDown");
    rp.push("LookLeft(width=7)");
    rp.push("LookLeft(width=8)");
    rp.push("LookLeft(width=9)");
    rp.push("LookLeft(width=10)");
  }, "Producer");
  producer.start();
}

sclass RepeatColumn extends Predictor {
  float[] nextColumn(float[] x) {
    ret x;
  }
}

sclass ShiftDown extends Predictor {
  float[] nextColumn(float[] f) {
    if (f == null) null;
    float[] g = copyColumn(f);
    for (int i = 1; i < l(f); i++)
      g[i] = f[i-1];
    ret g;
  }
}

sclass LookLeft extends Predictor {
  int width; // how far to look left
  float[][] buf;
  int x;
  
  float[] nextColumn(float[] f) {
    if (f == null) null;
    if (buf == null) buf = new float[width][];
    
    // exchange with data in rotating buffer
    // (will return null until buffer is filled)
    float[] g = buf[x];
    buf[x] = f;
    x = (x+1) % width;
    ret g;
  }
}

static BWImage makeTriangle() {
  int w = 30, h = w;
  BWImage img = new BWImage(w, h);
  for y to h: for x to w:
    img.setPixel(x, y, x < y ? 1 : 0);
  ret img;
}

Began life as a copy of #1004557