raylib-src/examples/core/core_multitouch.c

/*******************************************************************************************
*
*   raylib [core] example - Multitouch input
*
*   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)
*
*   Copyright (c) 2014 Ramon Santamaria (@raysan5)
*   Example by Berni
*
********************************************************************************************/

#include "raylib.h"
#include <stdio.h>

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

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

    Vector2 ballPosition = { -100.0f, -100.0f };
    Color ballColor;
    int PressedCounter = 0;
    Vector2 TouchPos;
    char Str[16];

    SetTargetFPS(60);
    //---------------------------------------------------------------------------------------
  
    // 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)) PressedCounter = 10;
        if (IsMouseButtonPressed(MOUSE_MIDDLE_BUTTON)) PressedCounter = 10;
        if (IsMouseButtonPressed(MOUSE_RIGHT_BUTTON)) PressedCounter = 10;
        if(PressedCounter > 0)
            PressedCounter--;
        //----------------------------------------------------------------------------------

        // Draw
        //----------------------------------------------------------------------------------
        BeginDrawing();

            ClearBackground(RAYWHITE);

            // Multitouch
            for (int i = 0; i < MAX_TOUCH_POINTS; ++i)
            {              
                TouchPos = GetTouchPosition(i);                                     // Get the touch point
                
                if( (TouchPos.x >= 0) && (TouchPos.y >= 0)  )                       // Make sure point is not (-1,-1) as this means there is no touch for it
                {
                    DrawCircleV(TouchPos, 34, ORANGE);                              // Draw a circle there
                    
                    sprintf(Str,"%d",i);
                    DrawText(Str, TouchPos.x - 10, TouchPos.y - 70, 40, BLACK);     // Also show its index number
                } 
            }

            // Draw the normal mouse location
            DrawCircleV(ballPosition, 30 + (PressedCounter * 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;
}