[examples] : adding new fancy clock

examples/shapes/shapes_digital_clock.c

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+/*******************************************************************************************
+*
+*   raylib [shapes] example - fancy clock using basic shapes
+*
+*   Example complexity rating: [★★☆☆] 2/4
+*
+*   Example originally created with raylib 5.5, last time updated with raylib 5.5
+*
+*   Example contributed by Hamza RAHAL (@hmz-rhl) 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) 2025-2025 Hamza RAHAL (@hmz-rhl)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+#include <math.h> // needed for cos & sin functions
+#include <time.h> // needed to get machine time
+
+#define DIGIT_SIZE 30
+
+typedef enum
+{
+    NORMAL_MODE = 0,
+    HANDS_FREE_MODE,
+} ClockMode;
+
+typedef struct
+{
+    int value;
+    Vector2 origin;
+    float angle;
+    int length;
+    int thickness;
+    Color colour;
+} Hand;
+
+typedef struct
+{
+    Hand second;
+    Hand minute;
+    Hand hour;
+    ClockMode cm;
+} Clock;
+
+
+void UpdateClock(Clock *clock)
+{
+    time_t rawtime;
+    struct tm * timeinfo;
+
+    time(&rawtime);
+    timeinfo = localtime(&rawtime);
+
+    // updating datas    
+    clock->second.value = timeinfo->tm_sec;
+    clock->minute.value = timeinfo->tm_min;
+    clock->hour.value = timeinfo->tm_hour;
+
+    clock->hour.angle = (timeinfo->tm_hour % 12)*180.0/6.0f;
+    clock->hour.angle += (timeinfo->tm_min % 60)*30/60.0f;
+    clock->hour.angle -= 90 ;
+
+    clock->minute.angle = (timeinfo->tm_min % 60)*6.0f;
+    clock->minute.angle += (timeinfo->tm_sec % 60)*6/60.0f;
+    clock->minute.angle -= 90 ;
+   
+    clock->second.angle = (timeinfo->tm_sec % 60)*6.0f;
+    clock->second.angle -= 90 ;
+
+}
+
+void drawClock(Clock clock)
+{
+    if (clock.cm == HANDS_FREE_MODE)
+    {
+        DrawText(TextFormat("%i", clock.second.value), clock.second.origin.x + (clock.second.length - 10)*cos(clock.second.angle*(float)(M_PI/180)) - DIGIT_SIZE/2, clock.second.origin.y + clock.second.length*sin(clock.second.angle*(float)(M_PI/180)) - DIGIT_SIZE/2, DIGIT_SIZE, GRAY);
+
+        DrawText(TextFormat("%i", clock.minute.value), clock.minute.origin.x + clock.minute.length*cos(clock.minute.angle*(float)(M_PI/180)) - DIGIT_SIZE/2, clock.minute.origin.y + clock.minute.length*sin(clock.minute.angle*(float)(M_PI/180)) - DIGIT_SIZE/2, DIGIT_SIZE, RED);
+
+        DrawText(TextFormat("%i", clock.hour.value), clock.hour.origin.x + clock.hour.length*cos(clock.hour.angle*(float)(M_PI/180)) - DIGIT_SIZE/2, clock.hour.origin.y + clock.hour.length*sin(clock.hour.angle*(float)(M_PI/180)) - DIGIT_SIZE/2, DIGIT_SIZE, GOLD);
+    }
+    else
+    {
+        DrawRectanglePro(
+            (Rectangle){   clock.second.origin.x,
+                clock.second.origin.y,
+                clock.second.length,
+                clock.second.thickness,
+            }
+            , (Vector2){0, clock.second.thickness/2},
+            clock.second.angle,
+            clock.second.colour
+        );
+
+        DrawRectanglePro(
+            (Rectangle){   clock.minute.origin.x,
+                clock.minute.origin.y,
+                clock.minute.length,
+                clock.minute.thickness,
+            }
+            , (Vector2){0, clock.minute.thickness/2},
+            clock.minute.angle,
+            clock.minute.colour
+        );
+
+        DrawRectanglePro(
+            (Rectangle){   clock.hour.origin.x,
+                clock.hour.origin.y,
+                clock.hour.length,
+                clock.hour.thickness,
+            }
+            , (Vector2){0, clock.hour.thickness/2},
+            clock.hour.angle,
+            clock.hour.colour
+        );
+    }
+}
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    Clock myClock = {
+        .cm = NORMAL_MODE,
+
+        .second.origin = (Vector2){400, 225},
+        .second.angle = 45,
+        .second.length = 140,        
+        .second.thickness = 3,
+        .second.colour = BEIGE,
+
+        .minute.origin = (Vector2){400, 225},
+        .minute.angle = 10,
+        .minute.length = 130,
+        .minute.thickness = 7,
+        .minute.colour = DARKGRAY,
+
+        .hour.origin = (Vector2){400, 225},
+        .hour.angle = 0,
+        .hour.length = 100,
+        .hour.thickness = 7,
+        .hour.colour = BLACK,
+    };
+
+    InitWindow(screenWidth, screenHeight, "raylib [shapes] example - digital clock");
+
+    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
+        if (IsKeyPressed(KEY_SPACE))
+        {
+            myClock.cm = (myClock.cm == HANDS_FREE_MODE) ? NORMAL_MODE : HANDS_FREE_MODE;
+        }
+
+        UpdateClock(&myClock);
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+        
+        ClearBackground(RAYWHITE);
+
+            DrawCircle(400, 225, 5, BLACK); // center dot
+            drawClock(myClock);
+
+            DrawText("press [SPACE] to switch clock mode", 350, 400, 10, GRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}