First commit.

Source/OpenNest.Core/CNC/SubProgramCall.cs

@@ -0,0 +1,87 @@
+namespace OpenNest.CNC
+{
+    public class SubProgramCall : ICode
+    {
+        private double rotation;
+        private Program program;
+
+        public SubProgramCall()
+        {
+        }
+
+        public SubProgramCall(Program program, double rotation)
+        {
+            this.program = program;
+            this.Rotation = rotation;
+        }
+
+        /// <summary>
+        /// The program ID.
+        /// </summary>
+        public int Id { get; set; }
+
+        /// <summary>
+        /// Gets or sets the program.
+        /// </summary>
+        public Program Program
+        {
+            get { return program; }
+            set
+            {
+                program = value;
+                UpdateProgramRotation();
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets the rotation of the program in degrees.
+        /// </summary>
+        public double Rotation
+        {
+            get { return rotation; }
+            set
+            {
+                rotation = value;
+                UpdateProgramRotation();
+            }
+        }
+
+        /// <summary>
+        /// Rotates the program by the difference of the current
+        /// rotation set in the sub program call and the program.
+        /// </summary>
+        private void UpdateProgramRotation()
+        {
+            if (program != null)
+            {
+                var diffAngle = Angle.ToRadians(rotation) - program.Rotation;
+
+                if (!diffAngle.IsEqualTo(0.0))
+                    program.Rotate(diffAngle);
+            }
+        }
+
+        /// <summary>
+        /// Gets the code type.
+        /// </summary>
+        /// <returns></returns>
+        public CodeType Type
+        {
+            get { return CodeType.SubProgramCall; }
+        }
+
+        /// <summary>
+        /// Gets a shallow copy.
+        /// </summary>
+        /// <returns></returns>
+        public ICode Clone()
+        {
+            return new SubProgramCall(program, Rotation);
+        }
+
+        public override string ToString()
+        {
+            return string.Format("G65 P{0} R{1}", Id, Rotation);
+        }
+    }
+}