Add some examples

examples/core/input_multitouch.zig

@@ -0,0 +1,83 @@
+//
+// input_multitouch
+// Zig version: 
+// Author: Nikolas Wipper
+// Date: 2020-02-16
+//
+
+usingnamespace @import("raylib");
+
+pub fn main() anyerror!void
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const screenWidth = 800;
+    const screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, c"raylib-zig [core] example - basic window");
+
+    var ballPosition = Vector2 { .x = -100.0, .y = -100.0 };
+    var ballColor = BEIGE;
+
+    var touchCounter: i32 = 0;
+    var touchPosition = Vector2 { .x = 0.0, .y = 0.0 };
+
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        ballPosition = GetMousePosition();
+
+        ballColor = BEIGE;
+
+        if (IsMouseButtonDown(MouseButton.MOUSE_LEFT_BUTTON)) { ballColor = MAROON };
+        if (IsMouseButtonDown(MouseButton.MOUSE_MIDDLE_BUTTON)) { ballColor = LIME };
+        if (IsMouseButtonDown(MouseButton.MOUSE_RIGHT_BUTTON)) { ballColor = DARKBLUE };
+
+        if (IsMouseButtonPressed(MouseButton.MOUSE_LEFT_BUTTON)) { touchCounter = 10 };
+        if (IsMouseButtonPressed(MouseButton.MOUSE_MIDDLE_BUTTON)) { touchCounter = 10 };
+        if (IsMouseButtonPressed(MouseButton.MOUSE_RIGHT_BUTTON)) { touchCounter = 10 };
+
+        if (touchCounter > 0) { touchCounter -= 1; };
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            // Multitouch
+            for (int i = 0; i < MAX_TOUCH_POINTS; ++i)
+            {
+                touchPosition = GetTouchPosition(i);                    // Get the touch point
+
+                if ((touchPosition.x >= 0) && (touchPosition.y >= 0))   // Make sure point is not (-1,-1) as this means there is no touch for it
+                {
+                    // Draw circle and touch index number
+                    DrawCircleV(touchPosition, 34, ORANGE);
+                    DrawText(FormatText("%d", i), touchPosition.x - 10, touchPosition.y - 70, 40, BLACK);
+                }
+            }
+
+            // Draw the normal mouse location
+            DrawCircle(@floatToInt(c_int, ballPosition.x), @floatToInt(c_int, ballPosition.y), 30 + (touchCounter*3), ballColor);
+            //DrawCircleV(ballPosition, 30 + (touchCounter*3), ballColor);
+
+            DrawText(c"move ball with mouse and click mouse button to change color", 10, 10, 20, DARKGRAY);
+            DrawText(c"touch the screen at multiple locations to get multiple balls", 10, 30, 20, DARKGRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+}
+