Update/merge examples back into main repo (#192)

Examples/Core/InputMultitouch.cs

@@ -0,0 +1,91 @@
+/*******************************************************************************************
+*
+*   raylib [core] example - Input multitouch
+*
+*   This example has been created using raylib 2.1 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Example contributed by Berni (@Berni8k) and reviewed by Ramon Santamaria (@raysan5)
+*
+*   Copyright (c) 2019 Berni (@Berni8k) and Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+using System.Numerics;
+using static Raylib_cs.Raylib;
+
+namespace Examples.Core;
+
+public class InputMultitouch
+{
+    public static int Main()
+    {
+        // Initialization
+        //--------------------------------------------------------------------------------------
+        const int screenWidth = 800;
+        const int screenHeight = 450;
+
+        InitWindow(screenWidth, screenHeight, "raylib [core] example - input multitouch");
+
+        const int MaxTouchPoints = 10;
+        Vector2[] touchPositions = new Vector2[MaxTouchPoints];
+
+        SetTargetFPS(60);
+        //---------------------------------------------------------------------------------------
+
+        // Main game loop
+        while (!WindowShouldClose())
+        {
+            // Update
+            //----------------------------------------------------------------------------------
+            // Get the touch point count (h ow many fingers are touching the screen )
+            int tCount = GetTouchPointCount();
+
+            // Clamp touch points available (set the maximum touch points allowed )
+            if (tCount > MaxTouchPoints)
+            {
+                tCount = MaxTouchPoints;
+            }
+
+            // Get touch points positions
+            for (int i = 0; i < tCount; i++)
+            {
+                touchPositions[i] = GetTouchPosition(i);
+            }
+            //----------------------------------------------------------------------------------
+
+            // Draw
+            //----------------------------------------------------------------------------------
+            BeginDrawing();
+            ClearBackground(Color.RAYWHITE);
+
+            for (int i = 0; i < tCount; i++)
+            {
+                // Make sure point is not (0, 0) as this means there is no touch for it
+                if ((touchPositions[i].X > 0) && (touchPositions[i].Y > 0))
+                {
+                    // Draw circle and touch index number
+                    DrawCircleV(touchPositions[i], 34, Color.ORANGE);
+                    DrawText(i.ToString(),
+                        (int)touchPositions[i].X - 10,
+                        (int)touchPositions[i].Y - 70,
+                        40,
+                        Color.BLACK
+                    );
+                }
+            }
+
+            DrawText("touch the screen at multiple locations to get multiple balls", 10, 10, 20, Color.DARKGRAY);
+
+            EndDrawing();
+            //----------------------------------------------------------------------------------
+        }
+
+        // De-Initialization
+        //--------------------------------------------------------------------------------------
+        CloseWindow();
+        //--------------------------------------------------------------------------------------
+
+        return 0;
+    }
+}