Data commit

Task/Draw-a-rotating-cube/C-sharp/draw-a-rotating-cube.cs

@@ -0,0 +1,97 @@
+using System;
+using System.Drawing;
+using System.Drawing.Drawing2D;
+using System.Windows.Forms;
+using System.Windows.Threading;
+
+namespace RotatingCube
+{
+    public partial class Form1 : Form
+    {
+        double[][] nodes = {
+            new double[] {-1, -1, -1}, new double[] {-1, -1, 1}, new double[] {-1, 1, -1},
+            new double[] {-1, 1, 1}, new double[] {1, -1, -1}, new double[] {1, -1, 1},
+            new double[] {1, 1, -1}, new double[] {1, 1, 1} };
+
+        int[][] edges = {
+            new int[] {0, 1}, new int[] {1, 3}, new int[] {3, 2}, new int[] {2, 0}, new int[] {4, 5},
+            new int[] {5, 7}, new int[] {7, 6}, new int[] {6, 4}, new int[] {0, 4}, new int[] {1, 5},
+            new int[] {2, 6}, new int[] {3, 7}};
+
+        public Form1()
+        {
+            Width = Height = 640;
+            StartPosition = FormStartPosition.CenterScreen;
+            SetStyle(
+                ControlStyles.AllPaintingInWmPaint |
+                ControlStyles.UserPaint |
+                ControlStyles.DoubleBuffer,
+                true);
+
+            Scale(100, 100, 100);
+            RotateCuboid(Math.PI / 4, Math.Atan(Math.Sqrt(2)));
+
+            var timer = new DispatcherTimer();
+            timer.Tick += (s, e) => { RotateCuboid(Math.PI / 180, 0); Refresh(); };
+            timer.Interval = new TimeSpan(0, 0, 0, 0, 17);
+            timer.Start();
+        }
+
+        private void RotateCuboid(double angleX, double angleY)
+        {
+            double sinX = Math.Sin(angleX);
+            double cosX = Math.Cos(angleX);
+
+            double sinY = Math.Sin(angleY);
+            double cosY = Math.Cos(angleY);
+
+            foreach (var node in nodes)
+            {
+                double x = node[0];
+                double y = node[1];
+                double z = node[2];
+
+                node[0] = x * cosX - z * sinX;
+                node[2] = z * cosX + x * sinX;
+
+                z = node[2];
+
+                node[1] = y * cosY - z * sinY;
+                node[2] = z * cosY + y * sinY;
+            }
+        }
+
+        private void Scale(int v1, int v2, int v3)
+        {
+            foreach (var item in nodes)
+            {
+                item[0] *= v1;
+                item[1] *= v2;
+                item[2] *= v3;
+            }
+        }
+
+        protected override void OnPaint(PaintEventArgs args)
+        {
+            var g = args.Graphics;
+            g.SmoothingMode = SmoothingMode.HighQuality;
+            g.Clear(Color.White);
+
+            g.TranslateTransform(Width / 2, Height / 2);
+
+            foreach (var edge in edges)
+            {
+                double[] xy1 = nodes[edge[0]];
+                double[] xy2 = nodes[edge[1]];
+                g.DrawLine(Pens.Black, (int)Math.Round(xy1[0]), (int)Math.Round(xy1[1]),
+                        (int)Math.Round(xy2[0]), (int)Math.Round(xy2[1]));
+            }
+
+            foreach (var node in nodes)
+            {
+                g.FillEllipse(Brushes.Black, (int)Math.Round(node[0]) - 4,
+                    (int)Math.Round(node[1]) - 4, 8, 8);
+            }
+        }
+    }
+}