ImplicitSurfaceNetwork/application/main.cpp

#include <iostream>
#include <array>
#include <fstream>
#include <string>
#include <filesystem> 

#include <solve.h>

// filepath: c:\Users\mckay\programs\ImplicitSurfaceNetwork\application\main.cpp
void write_obj(const polymesh_t& mesh, std::string filename = "output.obj") {
    std::ofstream obj(filename);
    if (!obj) return;

    // 写入顶点
    for (uint32_t i = 0; i < mesh.num_vertices; ++i) {
        const auto& v = mesh.vertices[i];
        obj << "v " << v.x << " " << v.y << " " << v.z << "\n";
    }

    // 写入面
    uint32_t idx = 0;
    for (uint32_t i = 0; i < mesh.num_faces; ++i) {
        obj << "f";
        for (uint32_t j = 0; j < mesh.vertex_counts[i]; ++j) {
            // OBJ 索引从1开始
            obj << " " << (mesh.faces[idx++] + 1);
        }
        obj << "\n";
    }
    std::cout << "OBJ file written to: " << std::filesystem::absolute(filename) << std::endl;
}

int main()
{
    auto primitive_data_center = create_primitive_data_center();
    auto sphere1               = create_primitive(primitive_data_center, PRIMITIVE_TYPE_SPHERE);
    // auto sphere2               = create_primitive(primitive_data_center, PRIMITIVE_TYPE_SPHERE);
    auto cylinder              = create_primitive(primitive_data_center, PRIMITIVE_TYPE_CYLINDER);
    primitive_apply_translation(sphere1, {0.5, 0.0, 0.0});
    std::cout << "primitive created..." << std::endl;

    auto runtime_blobtree = create_blobtree();
    auto node_iter1       = blobtree_add_primitive_node(runtime_blobtree, cylinder);
    auto node_iter2       = blobtree_add_primitive_node(runtime_blobtree, sphere1);
    auto node_iter3       = blobtree_add_operation_node(runtime_blobtree, node_iter1, node_iter2, INTERSECTION_OP);
    auto baked_blobtree   = bake_blobtree(runtime_blobtree);
    destroy_blobtree(runtime_blobtree);

    std::cout << "blobtree created..." << std::endl;

    s_settings settings{};
    settings.resolution                         = 21;
    settings.scene_aabb_margin                  = 1e-5;
    settings.restricted_primitive_bounding_test = true;
    auto solver                                 = create_solver(baked_blobtree, settings);

    auto result = generate_polymesh(solver);
    write_obj(result.mesh, "output.obj");
    print_statistics(solver);

    destroy_solver(solver);
    destroy_baked_blobtree(baked_blobtree);
    destroy_primitive(sphere1);
    destroy_primitive(cylinder);
    destroy_primitive_data_center(primitive_data_center);

    return 0;
}