Data commit

Task/Constrained-random-points-on-a-circle/Swift/constrained-random-points-on-a-circle.swift

@@ -0,0 +1,59 @@
+let nPoints = 100
+
+func generatePoint() -> (Int, Int) {
+  while true {
+    let x = Int.random(in: -15...16)
+    let y = Int.random(in: -15...16)
+    let r2 = x * x + y * y
+
+    if r2 >= 100 && r2 <= 225 {
+      return (x, y)
+    }
+  }
+}
+
+func filteringMethod() {
+  var rows = [[String]](repeating: Array(repeating: " ", count: 62), count: 31)
+
+  for _ in 0..<nPoints {
+    let (x, y) = generatePoint()
+
+    rows[y + 15][x + 15 * 2] = "*"
+  }
+
+  for row in rows {
+    print(row.joined())
+  }
+}
+
+func precalculatingMethod() {
+  var possiblePoints = [(Int, Int)]()
+
+  for y in -15...15 {
+    for x in -15...15 {
+      let r2 = x * x + y * y
+
+      if r2 >= 100 && r2 <= 225 {
+        possiblePoints.append((x, y))
+      }
+    }
+  }
+
+  possiblePoints.shuffle()
+
+  var rows = [[String]](repeating: Array(repeating: " ", count: 62), count: 31)
+
+  for (x, y) in possiblePoints {
+    rows[y + 15][x + 15 * 2] = "*"
+  }
+
+  for row in rows {
+    print(row.joined())
+  }
+}
+
+print("Filtering method:")
+filteringMethod()
+
+print("Precalculating method:")
+precalculatingMethod()