Options.h

/*
 * Copyright 2026 Adobe. All rights reserved.
 * This file is licensed to you under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. You may obtain a copy
 * of the License at http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under
 * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
 * OF ANY KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
#pragma once
 
#include <cstdint>
#include <string_view>
#include <vector>
 
namespace lagrange::xatlas {

struct ChartOptions
{
    float max_chart_area = 0.f;

    float max_boundary_length = 0.f;

    float normal_deviation_weight = 2.f;

    float roundness_weight = 0.01f;

    float straightness_weight = 6.f;

    float normal_seam_weight = 4.f;

    float texture_seam_weight = 0.5f;

    float max_cost = 2.f;

    uint32_t max_iterations = 1;

    bool use_input_mesh_uvs = false;

    bool fix_winding = true;
};

struct PackOptions
{
    uint32_t max_chart_size = 0;

    uint32_t padding = 0;

    float texels_per_unit = 0.f;

    uint32_t resolution = 0;

    bool bilinear = true;

    bool block_align = false;

    bool brute_force = false;

    bool rotate_charts_to_axis = true;

    bool rotate_charts = true;
};

enum class MultiAtlasPolicy {
    NormalizePerTile,

    Udim,

    ErrorIfMultiple,
};

struct UnwrapOptions
{
    ChartOptions chart;

    PackOptions packing;

    std::string_view input_uv_attribute_name;

    std::string_view input_normal_attribute_name;

    MultiAtlasPolicy multi_atlas_policy = MultiAtlasPolicy::NormalizePerTile;

    std::string_view output_uv_attribute_name = "@uv";

    std::string_view output_atlas_attribute_name = "";

    std::string_view output_chart_attribute_name = "";

    bool enable_sharing_uvs_between_instances = false;
};

struct RepackOptions
{
    PackOptions packing;

    std::string_view input_uv_attribute_name;

    std::string_view input_chart_attribute_name;

    MultiAtlasPolicy multi_atlas_policy = MultiAtlasPolicy::NormalizePerTile;

    std::string_view output_uv_attribute_name = "@uv";

    std::string_view output_atlas_attribute_name = "";

    std::string_view output_chart_attribute_name = "";

    bool enable_sharing_uvs_between_instances = false;
};

struct SceneOptions
{
    std::vector<float> per_instance_importance;
};
 
} // namespace lagrange::xatlas