model.hpp

/*
 * MIT License
 *
 * Copyright (c) 2024 Giovanni Santini
 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */
 
#pragma once
 
#include "mesh.hpp"
#include "shader.hpp"
 
#include <assimp/Importer.hpp>
#include <assimp/postprocess.h>
#include <assimp/scene.h>
#include <glad/glad.h>
#include <string>
#include <vector>
 
namespace brenta
{
 
class model
{
  public:
    GLint wrapping;
    GLint filtering_min;
    GLint filtering_mag;
    GLboolean has_mipmap;
    GLint mipmap_min;
    GLint mipmap_mag;
    bool flip;
 
    model()
    {
    }
    model(std::string const &path, GLint wrapping = GL_REPEAT,
          GLint filtering_min = GL_NEAREST, GLint filtering_mag = GL_LINEAR,
          GLboolean has_mipmap = GL_TRUE,
          GLint mipmap_min = GL_LINEAR_MIPMAP_LINEAR,
          GLint mipmap_mag = GL_LINEAR, bool flip = true);
 
    class builder;
 
    void draw(types::shader_name_t shader);
 
  private:
    // model data
    std::vector<mesh> meshes;
    std::vector<types::texture> textures_loaded;
    std::string directory;
 
    void load_model(std::string path);
    void process_node(aiNode *node, const aiScene *scene);
    mesh process_mesh(aiMesh *mesh, const aiScene *scene);
    std::vector<types::texture> load_material_textures(aiMaterial *mat,
                                                       aiTextureType type,
                                                       std::string type_name);
};
 
class model::builder
{
  private:
    std::string path;
    GLint wrapping = GL_REPEAT;
    GLint filtering_min = GL_NEAREST;
    GLint filtering_mag = GL_LINEAR;
    GLboolean has_mipmap = GL_TRUE;
    GLint mipmap_min = GL_LINEAR_MIPMAP_LINEAR;
    GLint mipmap_mag = GL_LINEAR;
    bool flip = true;
 
  public:
    builder &set_path(std::string path);
    builder &set_wrapping(GLint wrapping);
    builder &set_filtering_min(GLint filtering_min);
    builder &set_filtering_mag(GLint filtering_mag);
    builder &set_has_mipmap(GLboolean has_mipmap);
    builder &set_mipmap_min(GLint mipmap_min);
    builder &set_mipmap_mag(GLint mipmap_mag);
    builder &set_flip(bool flip);
 
    model build();
};
 
} // namespace brenta