Data commit

Task/Hilbert-curve/Processing/hilbert-curve.processing

@@ -0,0 +1,83 @@
+int  iterations = 7;
+float strokeLen = 600;
+int angleDeg = 90;
+String axiom = "L";
+StringDict rules = new StringDict();
+String sentence = axiom;
+int xo, yo;
+
+void setup() {
+  size(700, 700);
+  xo= 50;
+  yo = height - 50;
+  strokeWeight(1);
+  noFill();
+
+  rules.set("L", "+RF-LFL-FR+");
+  rules.set("R", "-LF+RFR+FL-");
+
+  generate(iterations);
+}
+
+void draw() {
+  background(0);
+  translate(xo, yo);
+  plot(radians(angleDeg));
+}
+
+void generate(int n) {
+  for (int i=0; i < n; i++) {
+    strokeLen *= 0.5;
+    String nextSentence = "";
+    for (int j=0; j < sentence.length(); j++) {
+      char c = sentence.charAt(j);
+      String ruleResult = rules.get(str(c), str(c));
+      nextSentence += ruleResult;
+    }
+    sentence = nextSentence;
+  }
+}
+
+void plot(float angle) {
+  for (int i=0; i < sentence.length(); i++) {
+    char c = sentence.charAt(i);
+    if (c == 'F') {
+      stroke(255);
+      line(0, 0, 0, -strokeLen);
+      translate(0, -strokeLen);
+    } else if (c == '+') {
+      rotate(angle);
+    } else if (c == '-') {
+      rotate(-angle);
+    }
+  }
+}
+
+void keyPressed() {
+  if (key == '-') {
+    angleDeg -= 1;
+    println("Angle: " + angleDeg);
+  }
+  if (key == '=' || key == '+') {
+    angleDeg += 1;
+    println("Angle: " + angleDeg);
+  }
+  if (key == 'a') {
+    strokeLen *= 2;
+  }
+  if (key == 'z') {
+    strokeLen /= 2;
+  }
+  if (keyCode == LEFT) {
+    xo -= 25;
+  }
+  if (keyCode == RIGHT) {
+    xo += 25;
+  }
+  if (keyCode == UP) {
+    yo -= 25;
+  }
+  if (keyCode == DOWN) {
+    yo += 25;
+  }
+}