Lightnet

Information:

It took time to get the code working correctly. This is rope mesh generator and spring mechanic.

create MeshIstance3D
- mesh > new ImmediateMesh

#links:

Blender 4.4.x

Testing how node editor works. Trying to make simple as possible but the register and unregister has some bug to handle remove nodes.

	// raylib 5.5
	// flecs v4.1.1
	// strange rotation for gui
	// y -85 to 85 is cap else it will have strange rotate.
	// note that child does not update the changes.
	#include <stdio.h>
	#include "raylib.h"
	#include "raymath.h"
	#include "flecs.h"
	#define RAYGUI_IMPLEMENTATION

	// flecs v4.1.1
	// strange rotation for gui
	// y -85 to 85 is cap else it will have strange rotate.
	#include <stdio.h>
	#include "raylib.h"
	#include "raymath.h"
	#include "flecs.h"
	#define RAYGUI_IMPLEMENTATION
	#include "raygui.h"

	// raylib 5.5
	// flecs v4.1
	// https://github.com/SanderMertens/flecs/blob/master/examples/c/systems/custom_pipeline/src/main.c
	//
	#include <stdio.h>
	#include <flecs.h>
	#include "raylib.h"
	#include <math.h>
	#define RAYGUI_IMPLEMENTATION
	#include "raygui.h"

	// raylib
	// https://github.com/SanderMertens/flecs/blob/master/examples/c/systems/custom_pipeline/src/main.c

	#include <stdio.h>
	#include <flecs.h>
	#include "raylib.h"
	//#define RAYGUI_IMPLEMENTATION
	//#include "raygui.h"

	// component

	shader_type canvas_item;

	uniform float segment_width = 0.2; // Angular width of each segment (radians)
	uniform float inner_radius = 0.1; // Inner radius of segments (UV space, 0.0–0.5)
	uniform float outer_radius = 0.5; // Outer radius of segments (UV space, 0.0–0.5)
	uniform float rotation_offset = 0.0; // Rotation offset in radians
	uniform int segments = 8; // Number of segments (menu items)
	uniform int selected_index = 0; // Selected segment (0–7)
	uniform vec4 line_color = vec4(1.0, 1.0, 1.0, 1.0); // Non-selected segment color
	uniform vec4 selected_color = vec4(1.0, 0.5, 0.5, 1.0); // Selected segment color

	@tool
	extends MeshInstance3D

	@export var rope_length: float = 5.0 # Total length of the rope
	@export var segments: int = 20 # Number of segments
	@export var radius: float = 0.1 # Thickness of the rope
	@export var sides: int = 8 # Number of sides for the rope's cross-section

	func _ready() -> void:
	generate_rope()

	@tool
	extends MeshInstance3D
	# this is for ImmediateMesh
	# works uv align but scale does not work.

	# Rope properties
	@export var rope_width: float = 0.1 # Radius of the rope
	@export var resoulution: int = 8 # Number of vertices around the rope's circumference
	@export var uv_scale: Vector2 = Vector2(1.0, 1.0) # UV scaling factor
	@export var texture_height_to_width: float = 1.0 # Texture aspect ratio (height/width)