raylib-src/examples/core/core_input_multitouch.c

/*******************************************************************************************
*
*   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)
*
********************************************************************************************/

#include "raylib.h"

#define MAX_TOUCH_POINTS 10

int main(void)
{
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 800;
    const int screenHeight = 450;

    InitWindow(screenWidth, screenHeight, "raylib [core] example - input multitouch");

    Vector2 ballPosition = { -100.0f, -100.0f };
    Color ballColor = BEIGE;

    int touchCounter = 0;
    Vector2 touchPosition = { 0.0f };

    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(MOUSE_LEFT_BUTTON)) ballColor = MAROON;
        if (IsMouseButtonDown(MOUSE_MIDDLE_BUTTON)) ballColor = LIME;
        if (IsMouseButtonDown(MOUSE_RIGHT_BUTTON)) ballColor = DARKBLUE;

        if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON)) touchCounter = 10;
        if (IsMouseButtonPressed(MOUSE_MIDDLE_BUTTON)) touchCounter = 10;
        if (IsMouseButtonPressed(MOUSE_RIGHT_BUTTON)) touchCounter = 10;

        if (touchCounter > 0) touchCounter--;
        //----------------------------------------------------------------------------------

        // 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(TextFormat("%d", i), touchPosition.x - 10, touchPosition.y - 70, 40, BLACK);
                }
            }

            // Draw the normal mouse location
            DrawCircleV(ballPosition, 30 + (touchCounter*3), ballColor);

            DrawText("move ball with mouse and click mouse button to change color", 10, 10, 20, DARKGRAY);
            DrawText("touch the screen at multiple locations to get multiple balls", 10, 30, 20, DARKGRAY);

        EndDrawing();
        //----------------------------------------------------------------------------------
    }

    // De-Initialization
    //--------------------------------------------------------------------------------------
    CloseWindow();        // Close window and OpenGL context
    //--------------------------------------------------------------------------------------

    return 0;
}