raysan5.raylib/examples/core/core_input_virtual_controls.c

/*******************************************************************************************
*
*   raylib [core] example - input virtual controls
*
*   Example originally created with raylib 5.0, last time updated with raylib 5.0
*
*   Example create by GreenSnakeLinux (@GreenSnakeLinux),
*   lighter by oblerion (@oblerion) and 
*   reviewed by Ramon Santamaria (@raysan5)
*
*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
*   BSD-like license that allows static linking with closed source software
*
*   Copyright (c) 2024 Ramon Santamaria (@raysan5)
*
********************************************************************************************/

#include "raylib.h"
#include <math.h>
//------------------------------------------------------------------------------------
// Program main entry point
//------------------------------------------------------------------------------------
int main(void)
{
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 800;
    const int screenHeight = 450;

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

    const float dpadX = 90;
    const float dpadY = 300;
    const float dpadRad = 25.0f;//radius of each pad
    Color dpadColor = BLUE;
    int dpadKeydown = -1;//-1 if not down, else 0,1,2,3 

    
    const float dpadCollider[4][2]= // collider array with x,y position
    {
        {dpadX,dpadY-dpadRad*1.5f},//up
        {dpadX-dpadRad*1.5f,dpadY},//left
        {dpadX+dpadRad*1.5f,dpadY},//right
        {dpadX,dpadY+dpadRad*1.5f}//down
    };
    const char dpadLabel[4]="XYBA";//label of Dpad

    float playerX=100;
    float playerY=100;

    SetTargetFPS(60);
    //--------------------------------------------------------------------------------------

    // Main game loop
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
    // Update 
    //--------------------------------------------------------------------------
        dpadKeydown = -1; //reset
        int inputX = 0;
        int inputY = 0;
        if(GetTouchPointCount()>0)
        {//use touch pos
            inputX = GetTouchX();
            inputY = GetTouchY();
        }
        else
        {//use mouse pos
            inputX = GetMouseX();
            inputY = GetMouseY();
        }
        for(int i=0;i<4;i++)
        {
            //test distance each collider and input < radius
            if( fabsf(dpadCollider[i][1]-inputY) + fabsf(dpadCollider[i][0]-inputX) < dpadRad)
            {
                dpadKeydown = i;
                break;
            }
        }
        // move player
        switch(dpadKeydown){
            case 0: playerY -= 50*GetFrameTime();
            break;
            case 1: playerX -= 50*GetFrameTime();
            break;
            case 2: playerX += 50*GetFrameTime();
            break;
            case 3: playerY += 50*GetFrameTime();
            default:;
        };
    //--------------------------------------------------------------------------
    // Draw 
    //--------------------------------------------------------------------------
       BeginDrawing();
            ClearBackground(RAYWHITE);
            for(int i=0;i<4;i++)
            {
                //draw all pad
                DrawCircleV((Vector2) { dpadCollider[i][0], dpadCollider[i][1] }, dpadRad, dpadColor);
                if(i!=dpadKeydown)
                {
                    //draw label
                    DrawText(TextSubtext(dpadLabel,i,1),
                             (int)dpadCollider[i][0]-7,
                             (int)dpadCollider[i][1]-8,20,BLACK);
                }
            }

            DrawRectangleRec((Rectangle) { playerX - 4, playerY - 4, 75, 28 }, RED);
            DrawText("Player", (int)playerX, (int)playerY, 20, WHITE);
        EndDrawing();
    //--------------------------------------------------------------------------
    }

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

    return 0;
}