Turtle graphics

turtle_graphics/turtle-graphics-including-stretch.js

@@ -0,0 +1,180 @@
+const fs = require("fs");
+
+class Turtle {
+  constructor(x, y) {
+    this.x = x;
+    this.y = y;
+    this.arr = [];
+    this.rights = 0;
+    this.lefts = 0;
+    this.arr.push([this.x, this.y]);
+    this.str = "";
+    this.maxY = 0;
+    this.maxX = 0;
+    return this;
+  }
+  forward(step) {
+    if (this.rights == 0 && this.lefts == 0) {
+      for (let i = 0; i < step; i++) {
+        this.x += 1;
+        this.arr.push([this.x, this.y]);
+      }
+    }
+    if (this.rights == 1 && this.lefts == 0) {
+      for (let i = 0; i < step; i++) {
+        this.y += 1;
+        this.arr.push([this.x, this.y]);
+      }
+    }
+
+    if (this.lefts == 1 && this.rights == 0) {
+      for (let i = 0; i < step; i++) {
+        this.y -= 1;
+        this.arr.push([this.x, this.y]);
+      }
+    }
+    if (this.lefts == 1 && this.rights == 1) {
+      for (let i = 0; i < step; i++) {
+        this.x -= 1;
+        this.arr.push([this.x, this.y]);
+      }
+    }
+
+    return this;
+  }
+  right() {
+    if (this.rights == 1 && this.lefts == 1) {
+      this.rights -= 1;
+    } else if (this.rights == 0 && this.lefts == 1) {
+      this.lefts -= 1;
+    } else if (this.rights == 1 && this.lefts == 0) {
+      this.lefts += 1;
+    } else {
+      this.rights += 1;
+    }
+
+    return this;
+  }
+  left() {
+    if (this.lefts == 1 && this.rights == 1) {
+      this.lefts -= 1;
+    } else if (this.lefts == 1 && this.rights == 0) {
+      this.rights += 1;
+    } else if (this.lefts == 0 && this.rights == 1) {
+      this.rights -= 1;
+    } else {
+      this.lefts += 1;
+    }
+
+    return this;
+  }
+  allPoints() {
+    return this.arr;
+  }
+  print() {
+    this.maxX = this.arr.sort((a, b) => a[0] - b[0]);
+    this.maxX = this.arr[this.arr.length - 1][0];
+    this.maxY = this.arr.sort((a, b) => a[1] - b[1]);
+    this.maxY = this.arr[this.arr.length - 1][1];
+    this.str += "--BEGIN LOG \n";
+    for (let y = 0; y <= this.maxY; y++) {
+      for (let x = 0; x <= this.maxX + 1; x++) {
+        if (this.arr.find((element) => element[0] === x && element[1] === y)) {
+          this.str += "●";
+        } else {
+          this.str += "○";
+        }
+      }
+      this.str += "\n";
+    }
+    this.str += "--END LOG";
+    return this.str;
+  }
+}
+
+// Function to split the script input into an array
+// and run the script using the values
+function runTurtleScript(input) {
+  let inputArr = input.split("-");
+  let a;
+
+  if (inputArr[0][0] == "t") {
+    a = new Turtle(
+      parseInt(inputArr[0].slice(1, inputArr[0].indexOf(","))),
+      parseInt(inputArr[0].slice(inputArr[0].indexOf(",") + 1))
+    );
+  } else {
+    a = new Turtle(0, 0);
+  }
+  for (let i = 0; i < inputArr.length; i++) {
+    if (inputArr[i][0] == "f") {
+      a.forward(parseInt(inputArr[i].slice(1)));
+    }
+    if (inputArr[i][0] == "r") {
+      a.right();
+    }
+    if (inputArr[i][0] == "l") {
+      a.left();
+    }
+  }
+  return a.print();
+}
+
+//Function to check if options were passed in,
+//and run scripts accordingly
+function scriptWithOption(input) {
+  // If there are no input
+  if (input == undefined) {
+    return;
+  }
+  // If the proper option were passed in
+  else if (input.slice(0, 9) == "--output=") {
+    let realInput = process.argv[3];
+    let data = runTurtleScript(realInput);
+
+    return fs.writeFile(input.slice(9), data, (err) => {
+      if (err) {
+        console.log(err);
+      } else {
+        console.log("🐢 Drawing written to " + input.slice(9));
+      }
+    });
+  } // if there are no option passed in,
+  // and the proper input were passed in,
+  // then run the script normally
+  else if (
+    input[0][0] == "f" ||
+    input[0][0] == "t" ||
+    input[0][0] == "l" ||
+    input[0][0] == "r"
+  ) {
+    return console.log(runTurtleScript(input));
+  } // if nothing from the above passes, there must be a typo, so return this
+  else {
+    return console.log(
+      "Please check your input again. There may be a typographical error"
+    );
+  }
+}
+// Below to run it as a script
+let input = process.argv[2];
+scriptWithOption(input);
+
+// below to run it normally
+// const result = new Turtle(0, 4)
+//   .forward(3)
+//   .left()
+//   .forward(3)
+//   .right()
+//   .forward(5)
+//   .right()
+//   .forward(8)
+//   .right()
+//   .forward(5)
+//   .right()
+//   .forward(3)
+//   .left()
+//   .forward(3)
+//   .print();
+
+// console.log(result);