TouhouGD/addons/MagicaVoxel_Importer_with_Extensions/VoxFormat/VoxMaterial.gd

var properties = null;
var material: StandardMaterial3D = null;

var type:
    get:
        return properties.get("_type", "diffuse");

var weight:
    get:
        return float(properties.get("_weight", 0));

var specular:
    get:
        return float(properties.get("spec"));

var roughness:
    get:
        return float(properties.get("rough"));

var flux:
    get:
        return float(properties.get("flux"));

var refraction:
    get:
        return float(properties.get("ior"));

func _init(properties):
    self.properties = properties;

func is_glass():
    return self.type == "_glass";

func get_material(color: Color):
    if (material != null): return material;
    
    material = StandardMaterial3D.new();
    material.vertex_color_is_srgb = true;
    material.vertex_color_use_as_albedo = true;
    
    match (self.type):
        "_metal":
            material.metallic = self.weight;
            material.metallic_specular = self.specular;
            material.roughness = self.roughness;
        "_emit":
            material.emission_enabled = true;
            material.emission = Color(color.r, color.g, color.b, self.weight);
            material.emission_energy = self.flux;
        "_glass":
            material.flags_transparent = true;
            material.albedo_color = Color(1, 1, 1, 1 - self.weight);
            material.refraction_enabled = true;
            material.refraction_scale = self.refraction * 0.01;
            material.roughness = self.roughness;
        "_diffuse", _:
            material.roughness = 1;
    return material;