MeshLodGenerator

The MeshLodGenerator class is a Godot Editor plugin tool designed to generate Levels of Detail (LODs) for MeshInstance3D nodes within a scene. This class provides methods to find mesh instances and generate LODs for individual meshes or entire scenes.
EDIT: I realized the Godot class used by this tool only works in editor debug run. I'm actively working on a workaround.

Methods

find_mesh_instances(node: Node) -> Array

Finds all MeshInstance3D nodes within the given node's subtree.

Parameters:

• node: The root node to start the search from.

Returns:

• Array: An array containing all MeshInstance3D nodes found within the subtree.

Example:

var mesh_instances = MeshLodGenerator.new().find_mesh_instances(get_tree().root)

generate_lods_for_mesh(mesh: MeshInstance3D, lod_bias: float = 0.5, normal_merge_angle: float = 25, normal_split_angle: float = 60)

Generates LODs for a given MeshInstance3D.

Parameters:

• mesh: The MeshInstance3D for which to generate LODs.
• lod_bias: The LOD bias value, going from 0.0 to 1.0. Default is 0.5.
• normal_merge_angle: The normal merge angle for LOD generation. Default is 25.
• normal_split_angle: The normal split angle for LOD generation. Default is 60.

Example:

var mesh = $MeshInstance3D
MeshLodGenerator.new().generate_lods_for_mesh(mesh, 0.5, 25, 60)

generate_lods_for_scene(scene: Node, lod_bias: float = 0.5, normal_merge_angle: float = 25, normal_split_angle: float = 60)

Generates LODs for all MeshInstance3D nodes within the given scene.

Parameters:

• scene: The root node of the scene for which to generate LODs.
• lod_bias: The LOD bias value for all meshes in the scene, going from 0.0 to 1.0. Default is 0.5.
• normal_merge_angle: The normal merge angle for LOD generation. Default is 25.
• normal_split_angle: The normal split angle for LOD generation. Default is 60.

Example:

var scene = get_tree().root
MeshLodGenerator.new().generate_lods_for_scene(scene, 0.5, 25, 60)

Example Usage

Here is an example of how you might use the MeshLodGenerator class in a script:

extends Node

func _ready():
    var scene = get_tree().get_root()
    var lod_generator = MeshLodGenerator.new()
    
    # Generate LODs for the entire scene
    lod_generator.generate_lods_for_scene(scene)

    # Find all MeshInstance3D nodes in the scene
    var mesh_instances = lod_generator.find_mesh_instances(scene)
    print(mesh_instances)

    # Generate LODs for a specific mesh instance
    if mesh_instances.size() > 0:
        lod_generator.generate_lods_for_mesh(mesh_instances[0])

Install

Copy the addons/mesh_lod_generator folder into your res://addons folder and activate the addon in the project settings