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

Examples/Shapes/CollisionArea.cs

@@ -0,0 +1,138 @@
+/*******************************************************************************************
+*
+*   raylib [shapes] example - collision area
+*
+*   This example has been created using raylib 2.5 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2013-2019 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+using static Raylib_cs.Raylib;
+
+namespace Examples.Shapes;
+
+public class CollisionArea
+{
+    public static int Main()
+    {
+        // Initialization
+        //---------------------------------------------------------
+        const int screenWidth = 800;
+        const int screenHeight = 450;
+
+        InitWindow(screenWidth, screenHeight, "raylib [shapes] example - collision area");
+
+        // Box A: Moving box
+        Rectangle boxA = new(10, GetScreenHeight() / 2 - 50, 200, 100);
+        int boxASpeedX = 4;
+
+        // Box B: Mouse moved box
+        Rectangle boxB = new(GetScreenWidth() / 2 - 30, GetScreenHeight() / 2 - 30, 60, 60);
+        Rectangle boxCollision = new();
+
+        int screenUpperLimit = 40;
+
+        // Movement pause
+        bool pause = false;
+        bool collision = false;
+
+        SetTargetFPS(60);
+        //----------------------------------------------------------
+
+        // Main game loop
+        while (!WindowShouldClose())
+        {
+            // Update
+            //-----------------------------------------------------
+            // Move box if not paused
+            if (!pause)
+            {
+                boxA.X += boxASpeedX;
+            }
+
+            // Bounce box on x screen limits
+            if (((boxA.X + boxA.Width) >= GetScreenWidth()) || (boxA.X <= 0))
+            {
+                boxASpeedX *= -1;
+            }
+
+            // Update player-controlled-box (box02)
+            boxB.X = GetMouseX() - boxB.Width / 2;
+            boxB.Y = GetMouseY() - boxB.Height / 2;
+
+            // Make sure Box B does not go out of move area limits
+            if ((boxB.X + boxB.Width) >= GetScreenWidth())
+            {
+                boxB.X = GetScreenWidth() - boxB.Width;
+            }
+            else if (boxB.X <= 0)
+            {
+                boxB.X = 0;
+            }
+
+            if ((boxB.Y + boxB.Height) >= GetScreenHeight())
+            {
+                boxB.Y = GetScreenHeight() - boxB.Height;
+            }
+            else if (boxB.Y <= screenUpperLimit)
+            {
+                boxB.Y = screenUpperLimit;
+            }
+
+            // Check boxes collision
+            collision = CheckCollisionRecs(boxA, boxB);
+
+            // Get collision rectangle (only on collision)
+            if (collision)
+            {
+                boxCollision = GetCollisionRec(boxA, boxB);
+            }
+
+            // Pause Box A movement
+            if (IsKeyPressed(KeyboardKey.KEY_SPACE))
+            {
+                pause = !pause;
+            }
+            //-----------------------------------------------------
+
+            // Draw
+            //-----------------------------------------------------
+            BeginDrawing();
+            ClearBackground(Color.RAYWHITE);
+
+            DrawRectangle(0, 0, screenWidth, screenUpperLimit, collision ? Color.RED : Color.BLACK);
+
+            DrawRectangleRec(boxA, Color.GOLD);
+            DrawRectangleRec(boxB, Color.BLUE);
+
+            if (collision)
+            {
+                // Draw collision area
+                DrawRectangleRec(boxCollision, Color.LIME);
+
+                // Draw collision message
+                int cx = GetScreenWidth() / 2 - MeasureText("COLLISION!", 20) / 2;
+                int cy = screenUpperLimit / 2 - 10;
+                DrawText("COLLISION!", cx, cy, 20, Color.BLACK);
+
+                // Draw collision area
+                string text = $"Collision Area: {(int)boxCollision.Width * (int)boxCollision.Height}";
+                DrawText(text, GetScreenWidth() / 2 - 100, screenUpperLimit + 10, 20, Color.BLACK);
+            }
+
+            DrawFPS(10, 10);
+
+            EndDrawing();
+            //-----------------------------------------------------
+        }
+
+        // De-Initialization
+        //---------------------------------------------------------
+        CloseWindow();
+        //----------------------------------------------------------
+
+        return 0;
+    }
+}