[examples] Added shapes_recursive_tree (#5229)

* ADDED: example: shapes_recursive_tree

* [examples] Added shapes_recursive_tree

* [examples] shapes_recursive_tree: adjustments

* Reduced tree depth from 12 to 10

* new shapes_recursive_tree.png

* follow the conventions

* follow the conventions 2

examples/shapes/shapes_recursive_tree.c

@@ -0,0 +1,141 @@
+/*******************************************************************************************
+*
+*   raylib [shapes] example - shapes recursive tree
+*
+*   Example complexity rating: [★★★☆] 3/4
+*
+*   Example originally created with raylib 5.6-dev, last time updated with raylib 5.6-dev
+*
+*   Example contributed by Jopestpe (@jopestpe)
+*
+*   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) 2018-2025 Jopestpe (@jopestpe)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+#include <math.h>
+
+#define RAYGUI_IMPLEMENTATION
+#include "raygui.h"                 // Required for GUI controls
+
+//----------------------------------------------------------------------------------
+// Types and Structures Definition
+//----------------------------------------------------------------------------------
+typedef struct {
+    Vector2 start;
+    Vector2 end;
+    float angle;
+    float length;
+} Branch;
+
+//----------------------------------------------------------------------------------
+// Module Functions Declaration
+//----------------------------------------------------------------------------------
+static Vector2 CalculateBranchEnd(Vector2 start, float angle, float length);
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [shapes] example - shapes recursive tree");
+
+    Vector2 start = { (screenWidth/2.0f) - 125.0f, screenHeight };
+    float angle = 40.0f;
+    float thick = 1.0f;   
+    float treeDepth = 10.0f;
+    float branchDecay = 0.66f;
+    float length = 120.0f;
+    bool bezier = false;
+
+    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
+        //----------------------------------------------------------------------------------
+
+        float theta = angle*DEG2RAD;
+        int maxBranches = (int)(powf(2, (int)(treeDepth)));
+        Branch branches[1024] = { 0 };
+        int count = 0;
+
+        Vector2 initialEnd = CalculateBranchEnd(start, 0.0f, length);
+        branches[count++] = (Branch){start, initialEnd, 0.0f, length};
+
+        for (int i = 0; i < count; i++) 
+        {
+            Branch branch = branches[i];
+            if (branch.length < 2) continue;
+
+            float nextLength = branch.length*branchDecay;
+
+            if (count < maxBranches && nextLength >= 2) 
+            {
+                Vector2 branchStart = branch.end;
+
+                Vector2 branchEnd1 = CalculateBranchEnd(branchStart, branch.angle + theta, nextLength);
+                Vector2 branchEnd2 = CalculateBranchEnd(branchStart, branch.angle - theta, nextLength);
+
+                branches[count++] = (Branch){branchStart, branchEnd1, branch.angle + theta, nextLength};
+                branches[count++] = (Branch){branchStart, branchEnd2, branch.angle - theta, nextLength};
+            }
+        }
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            for (int i = 0; i < count; i++) 
+            {
+                Branch branch = branches[i];
+                if (branch.length >= 2) 
+                {
+                    if (!bezier) DrawLineEx(branch.start, branch.end, thick, RED);
+                    else DrawLineBezier(branch.start, branch.end, thick, RED);
+                }
+            }
+
+            DrawLine(580, 0, 580, GetScreenHeight(), (Color){ 218, 218, 218, 255 });
+            DrawRectangle(580, 0, GetScreenWidth(), GetScreenHeight(), (Color){ 232, 232, 232, 255 });
+
+            // Draw GUI controls
+            //------------------------------------------------------------------------------
+            GuiSliderBar((Rectangle){ 640, 40, 120, 20}, "Angle", TextFormat("%.0f", angle), &angle, 0, 180);
+            GuiSliderBar((Rectangle){ 640, 70, 120, 20 }, "Length", TextFormat("%.0f", length), &length, 12.0f, 240.0f);
+            GuiSliderBar((Rectangle){ 640, 100, 120, 20}, "Decay", TextFormat("%.2f", branchDecay), &branchDecay, 0.1f, 0.78f);
+            GuiSliderBar((Rectangle){ 640, 130, 120, 20 }, "Depth", TextFormat("%.0f", treeDepth), &treeDepth, 1.0f, 10.f);
+            GuiSliderBar((Rectangle){ 640, 160, 120, 20}, "Thick", TextFormat("%.0f", thick), &thick, 1, 8);
+            GuiCheckBox((Rectangle){ 640, 190, 20, 20 }, "Bezier", &bezier);
+            //------------------------------------------------------------------------------
+
+            DrawFPS(10, 10);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
+
+static Vector2 CalculateBranchEnd(Vector2 start, float angle, float length)
+{
+    return (Vector2){ start.x + length*sinf(angle), start.y - length*cosf(angle) };
+}