X-Git-Url: https://git.r.bdr.sh/rbdr/tomato-sauce/blobdiff_plain/ae6dbe43bf54581dd7012f95581d4a1b6ee245f0..c7b4bd19a006d61c3b4979e884370d123cec7524:/lib/screens/circle.js

diff --git a/lib/screens/circle.js b/lib/screens/circle.js
new file mode 100644
index 0000000..d8a4d10
--- /dev/null
+++ b/lib/screens/circle.js
@@ -0,0 +1,32 @@
+'use strict';
+
+// Draws concentric circles. Each ring has its own color.
+const Circle = function (modulation, width, height, renderer) {
+  let response = [];
+
+  let circles = width > height ? height : width;
+
+  for (let i = 0; i < circles; i++) {
+    let centerX = Math.round(width / 2) + 1;
+    let centerY = Math.round(height / 2) + 1;
+
+    let red = Math.floor(Math.random() * 255);
+    let blue = Math.floor(Math.random() * 255);
+    let green = Math.floor(Math.random() * 255);
+
+    for (let j = 0; j < 180; j++) {
+      let angle =  2 * j * (Math.PI / 180);
+      let x = Math.round(centerX + Math.sin(angle) * i);
+      let y = Math.round(centerY + Math.cos(angle) * i);
+
+      if (x <= width && x > 0 && y <= height && y > 0) {
+        let position = `\x1B[${y};${x}H`; // Move cursor to y,x (CSI y;x H)
+        response += `${position}${renderer(red, blue, green)} `;
+      }
+    }
+  }
+
+  return response;
+};
+
+module.exports = Circle;