GuiSettingsModel.h

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// ----------------------------------------------------------------------------
// -                        Open3D: www.open3d.org                            -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.open3d.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
#include <map>
 
#include "open3d/visualization/rendering/Scene.h"
 
namespace open3d {
namespace visualization {
 
class GuiSettingsModel {
public:
    static constexpr const char* DEFAULT_IBL = "default";
    static constexpr const char* CUSTOM_IBL = "Custom KTX file...";
    static constexpr const char* DEFAULT_MATERIAL_NAME = "Polished ceramic";
    static constexpr const char* MATERIAL_FROM_FILE_NAME =
            "Material from file [default]";
    static constexpr const char* POINT_CLOUD_PROFILE_NAME =
            "Cloudy day (no direct sun)";
 
    struct LightingProfile {
        std::string name;
        double ibl_intensity;
        double sun_intensity;
        Eigen::Vector3f sun_dir;
        Eigen::Vector3f sun_color = {1.0f, 1.0f, 1.0f};
        rendering::Scene::Transform ibl_rotation =
                rendering::Scene::Transform::Identity();
        bool ibl_enabled = true;
        bool use_default_ibl = false;
        bool sun_enabled = true;
    };
 
    enum MaterialType {
        LIT = 0,
        UNLIT,
        NORMAL_MAP,
        DEPTH,
    };
 
    struct LitMaterial {
        Eigen::Vector3f base_color = {0.9f, 0.9f, 0.9f};
        float metallic = 0.f;
        float roughness = 0.7f;
        float reflectance = 0.5f;
        float clear_coat = 0.2f;
        float clear_coat_roughness = 0.2f;
        float anisotropy = 0.f;
    };
 
    struct UnlitMaterial {
        // The base color should NOT be {1, 1, 1}, because then the
        // model will be invisible against the default white background.
        Eigen::Vector3f base_color = {0.9f, 0.9f, 0.9f};
    };
 
    struct Materials {
        LitMaterial lit;
        UnlitMaterial unlit;
        float point_size = 3.0f;
        // 'name' is only used to keep the UI in sync. It is set by
        // Set...Material[s]() and should not be set manually.
        std::string lit_name;
    };
 
    static const std::vector<LightingProfile> lighting_profiles_;
    static const std::map<std::string, const LitMaterial> prefab_materials_;
    static const LightingProfile& GetDefaultLightingProfile();
    static const LightingProfile& GetDefaultPointCloudLightingProfile();
    static const LitMaterial&