ADDED: example: shapes_recursive_tree

examples/shapes/shapes_recursive_tree.c

@@ -0,0 +1,103 @@
+/*******************************************************************************************
+*
+*   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
+
+float theta;
+float thick = 1.0f;
+float branchDecay = 0.66f;
+bool bezier = false;
+
+void Branch(Vector2 start, float length, float angle) {
+    length *= branchDecay;
+
+    if (length > 2) {
+        Vector2 end = {
+            start.x + length * sinf(angle),
+            start.y - length * cosf(angle)
+        };
+
+        if(!bezier) DrawLineEx(start, end, thick, RED);  
+        else DrawLineBezier(start, end, thick, RED);  
+
+        Branch(end, length, angle + theta);
+        Branch(end, length, angle - theta);
+    }
+}
+
+//------------------------------------------------------------------------------------
+// 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, screenHeight };
+    Vector2 end = { (screenWidth / 2.0f) - 125, screenHeight - 120.0f };
+    float angle = 0.0f;
+
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        float a = (angle / screenWidth) * 90.0f;
+        theta = a * (PI / 180.0f);
+        
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            DrawLine(560, 0, 560, GetScreenHeight(), Fade(LIGHTGRAY, 0.6f));
+            DrawRectangle(560, 0, GetScreenWidth() - 500, GetScreenHeight(), Fade(LIGHTGRAY, 0.3f));
+            
+            // Draw GUI controls
+            //------------------------------------------------------------------------------
+            GuiSliderBar((Rectangle){ 640, 40, 120, 20}, "Angle", TextFormat("%.2f", angle), &angle, 0, 1600);
+            GuiSliderBar((Rectangle){ 640, 70, 120, 20}, "Thick", TextFormat("%.2f", thick), &thick, 1, 8);
+            GuiSliderBar((Rectangle){ 640, 100, 120, 20}, "Branch Decay", TextFormat("%.2f", branchDecay), &branchDecay, 0.1f, 0.78f);
+            GuiCheckBox((Rectangle){ 640, 130, 20, 20 }, "Bezier", &bezier);
+            //------------------------------------------------------------------------------
+            
+            DrawLineEx(start, end, thick, RED);
+            Branch(end, 120.0f, 0.0f);
+
+            DrawFPS(10, 10);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}