Added shapes_pie_chart example

examples/shapes/shapes_pie_chart.c

@@ -0,0 +1,81 @@
+/*******************************************************************************************
+*
+*   raylib [shapes] example - pie chart
+*
+*   Example complexity rating: [★☆☆☆] 1/4
+*
+*   Example originally created with raylib 5.5, last time updated with raylib 5.6
+*
+*   Example contributed by Gideon Serfontein (@GideonSerf) 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 Gideon Serfontein (@GideonSerf)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [shapes] example - pie chart");
+
+    // Pie slice angles (must sum to 360)
+    const int angles[] = { 30, 10, 45, 35, 60, 38, 75, 67 };
+    const int anglesCount = (int)(sizeof(angles)/sizeof(angles[0]));
+
+    const float radius = 150.0f;
+    const Vector2 center = { screenWidth/2.0f, screenHeight/2.0f };
+
+    // Set our game to run at 60 frames-per-second
+    SetTargetFPS(60);
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            float lastAngleDeg = 0.0f;
+
+            // Number of radial segments for sector drawing
+            const int segments = 100;
+
+            for (int i = 0; i < anglesCount; i++)
+            {
+                // Gradient gray color per slice
+                unsigned char gray = (unsigned char)((i/(float)anglesCount)*255.0f);
+
+                // Draw pie piece using DrawCircleSector()
+                DrawCircleSector(center, radius, lastAngleDeg, lastAngleDeg + (float)angles[i],
+                    segments, (Color){ gray, gray, gray, 255 });
+
+                lastAngleDeg += (float)angles[i];
+            }
+
+            DrawText("Pie chart drawing example", 260, 400, 20, LIGHTGRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}