2018 d10 p1 & p2

2018/10/java/README.md

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+## How to Play!
+Download [processing](https://processing.org/download/) (for free) and run this script inside of it.
+
+Zoom out a sufficient amount.
+Slow down and speed up time until you see the points align.
+#### Controls:
+* `+` | `-` - zoom in / out.
+* `>` | `<` - speed up / down.
+* `shift` + `>` | `<` - speed up / down (more).
+* `/` - set speed to `0`
+* ` ` (spacebar) takes a snapshot and saves it in `./frames/`.
+* arrow keys to move.

2018/10/java/java.pde

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+float[][] points = new float[370][4];
+float[] min = new float[] {0, 0},
+        max = new float[] {0, 0},
+        cen = new float[] {0, 0},
+        size = new float[] {0, 0},
+        tr = new float[] {0, 0};
+float zoom = 10;
+float speed = 1;
+float time = 0;
+
+void setup(){
+  String[] lines = loadStrings("../input.txt");
+  for (int l = 0; l < lines.length; l++) {
+    String[][] matches = matchAll(lines[l], "< *(-?\\d+), *(-?\\d+)>");
+    if (matches.length == 2){
+      points[l] = new float[]{
+        Integer.parseInt(matches[0][1]),
+        Integer.parseInt(matches[0][2]),
+        Integer.parseInt(matches[1][1]),
+        Integer.parseInt(matches[1][2])
+      };
+      for (int d = 0; d < 2; d++) {
+        min[d] = min(min[d], points[l][d]);
+        max[d] = max(max[d], points[l][d]);
+      }
+    }
+  }
+  size(500, 500);
+  frameRate(30);
+  background(200);
+}
+
+void draw() {
+	background(200);
+
+	// centering the image
+	size = new float[]{
+		(max[0]-cen[0])-(min[0]-cen[0]),
+		(max[1]-cen[1])-(min[1]-cen[1])
+	};
+	cen = new float[]{(max[0]+min[0])/2, (max[1]+min[1])/2};
+
+  for (int i = 0; i < points.length; i++) {
+		// drawing the image
+    rect(width/2 + (points[i][0]-cen[0]+tr[0]) * zoom, height/2 + (points[i][1]-cen[1]+tr[1]) * zoom, zoom, zoom);
+		// move the points
+    points[i][0] += points[i][2]*((speed * speed * speed)/frameRate);
+    points[i][1] += points[i][3]*((speed * speed * speed)/frameRate);
+		// centering the image
+    max = new float[]{max(max[0], points[i][0]), max(max[1], points[i][1])};
+    min = new float[]{min(min[0], points[i][0]), min(min[1], points[i][1])};
+  }
+	time += ((speed * speed * speed)/frameRate);
+	text("time: "+time,width/2,10);
+	point(width/2, height/2);
+	if (keyPressed){
+		if (key == ' '){
+			save("frames/"+frameCount+".jpg");
+		} else if (key == '<') {
+			speed -= 0.1;
+		} else if (key == '>') {
+			speed += 0.1;
+		} else if (key == ',') {
+			speed -= 0.01;
+		} else if (key == '.') {
+			speed += 0.01;
+		} else if (key == '/') {
+			speed = 0;
+		} else if (key == '-') {
+			zoom /= 1.2;
+		} else if (key == '=') {
+			zoom *= 1.2;
+		} else if (keyCode == 37) {
+			tr[0] += sqrt(zoom)/3;
+		} else if (keyCode == 39) {
+			tr[0] -= sqrt(zoom)/3;
+		} else if (keyCode == 38) {
+			tr[1] += sqrt(zoom)/3;
+		} else if (keyCode == 40) {
+			tr[1] -= sqrt(zoom)/3;
+		}
+		if (zoom <= 0) {
+			zoom = abs(zoom) + 1;
+		}
+	}
+}