Added ray casting ability

craftersmine.EtherEngine.Core/Ray.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using craftersmine.EtherEngine.Utilities;
+
+namespace craftersmine.EtherEngine.Core
+{
+    public class Ray
+    {
+        public Transform Transform { get; set; } = new Transform();
+        public float MaxLength { get; set; }
+        public float StartX { get { return Transform.X; } set { Transform.X = value; } }
+        public float StartY { get { return Transform.Y; } set { Transform.Y = value; } }
+        public float EndX { get; private set; }
+        public float EndY { get; private set; }
+
+        public Ray(int x, int y, float maxLength)
+        {
+            Transform.X = x;
+            Transform.Y = y;
+            MaxLength = maxLength;
+        }
+
+        public Ray(Point startPoint, float maxLength) : this(startPoint.X, startPoint.Y, maxLength) { }
+
+        public GameObject[] Cast(float angle)
+        {
+            // fix angle amount
+            while (angle >= 360.0f)
+            {
+                angle -= 360.0f;
+            }
+            // convert degree angle to radians
+            double radAngle = angle * (Math.PI / 180.0d);
+            // calculate x and y end point coordinate
+            float EndX = StartX + ((float)Math.Cos(radAngle) * MaxLength);
+            float EndY = StartY + ((float)Math.Sin(radAngle) * MaxLength);
+
+            if (Debugging.DrawRays)
+                Rendering.Window.CurrentWindow.GLGDI.DrawLine(Color.Blue, (int)StartX, (int)StartY, (int)EndX, (int)EndY);
+
+            // get casted objects from scene
+            List<GameObject> castedObjects = new List<GameObject>();
+            for (int i = 0; i < SceneManager.CurrentScene.GameObjects.Count; i++)
+            {
+                if (new Rectangle(
+                                        (int)SceneManager.CurrentScene.GameObjects[i].Transform.X,
+                                        (int)SceneManager.CurrentScene.GameObjects[i].Transform.Y,
+                                        SceneManager.CurrentScene.GameObjects[i].Transform.Width,
+                                        SceneManager.CurrentScene.GameObjects[i].Transform.Height)
+                                        .IsLineIntersects((int)StartX, (int)StartY, (int)EndX, (int)EndY))
+                {
+                    castedObjects.Add(SceneManager.CurrentScene.GameObjects[i]);
+                }
+            }
+            return castedObjects.ToArray();
+        }
+    }
+}