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examples/core/core_input_gamepad_virtual.c

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+/*******************************************************************************************
+*
+*   raylib [core] example - Minimal Virtual Dpad
+*
+*   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 - basic window");
+
+    const int dpad_x = 90;
+    const int dpad_y = 300;
+    const int dpad_rad = 25;//radius of each pad
+    Color dpad_color = BLUE;
+    int dpad_keydown = -1;//-1 if not down, else 0,1,2,3 
+
+    // collider[4] with x,y
+    const float dpad_collider[4][2]=
+    {
+        {dpad_x,dpad_y-dpad_rad*1.5},//up
+        {dpad_x-dpad_rad*1.5,dpad_y},//left
+        {dpad_x+dpad_rad*1.5,dpad_y},//right
+        {dpad_x,dpad_y+dpad_rad*1.5}//down
+    };
+    const char dpad_label[4]="XYBA";
+
+    float player_x=100;
+    float player_y=100;
+
+    SetTargetFPS(60);
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+	// update --------------------------------------------------------------------------
+        dpad_keydown = -1; //reset
+        float input_x=0;
+        float input_y=0;
+        if(GetTouchPointCount()>0)
+        {//use touch pos
+            input_x = GetTouchX();
+            input_y = GetTouchY();
+        }
+        else
+        {//use mouse pos
+            input_x = GetMouseX();
+            input_y = GetMouseY();
+        }
+        for(int i=0;i<4;i++)
+        {
+            //test distance each collider and input < radius
+            if( fabsf(dpad_collider[i][1]-input_y) + fabsf(dpad_collider[i][0]-input_x) < dpad_rad)
+            {
+                dpad_keydown = i;
+                break;
+            }
+        }
+        // move player
+        switch(dpad_keydown){
+            case 0: player_y -= 50*GetFrameTime();
+            break;
+            case 1: player_x -= 50*GetFrameTime();
+            break;
+            case 2: player_x += 50*GetFrameTime();
+            break;
+            case 3: player_y += 50*GetFrameTime();
+            default:;
+        };
+	// draw ----------------------------------------------------------------------------
+       BeginDrawing();
+            ClearBackground(RAYWHITE);
+
+            for(int i=0;i<4;i++)
+            {
+                //draw all pad
+                DrawCircle(dpad_collider[i][0],dpad_collider[i][1],dpad_rad,dpad_color);
+                if(i!=dpad_keydown)
+                {
+                    //draw label
+                    DrawText(TextSubtext(dpad_label,i,1),
+                             dpad_collider[i][0]-5,
+                             dpad_collider[i][1]-5,16,BLACK);
+                }
+
+            }
+            DrawText("Player",player_x,player_y,16,BLACK);
+        EndDrawing();
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
+