mesh.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 "buffer.hpp"
#include "gl_helper.hpp"
#include "shader.hpp"
#include "texture.hpp"
#include "vao.hpp"
 
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>
#include <string>
#include <vector>
 
namespace brenta
{
 
namespace types
{
 
struct vertex
{
    glm::vec3 position;
    glm::vec3 normal;
    glm::vec2 tex_coords;
};
 
struct texture
{
    unsigned int id;
    std::string type;
    std::string path;
};
 
} // namespace types
 
class mesh
{
  public:
    std::vector<types::vertex> vertices;
    std::vector<unsigned int> indices;
    std::vector<types::texture> textures;
    GLint wrapping;
    GLint filtering_min;
    GLint filtering_mag;
    GLboolean has_mipmap;
    GLint mipmap_min;
    GLint mipmap_mag;
 
    mesh(std::vector<types::vertex> vertices, std::vector<unsigned int> indices,
         std::vector<types::texture> textures, GLint wrapping = GL_REPEAT,
         GLint filtering_min = GL_NEAREST, GLint filtering_mag = GL_LINEAR,
         GLboolean hasMipmap = GL_TRUE,
         GLint mipmap_min = GL_LINEAR_MIPMAP_LINEAR,
         GLint mipmap_max = GL_LINEAR);
    class builder;
 
    void draw(types::shader_name_t shader_name);
 
  private:
    // render data
    types::vao vao;
    types::buffer vbo;
    types::buffer ebo;
    void setup_mesh();
};
 
class mesh::builder
{
  private:
    std::vector<types::vertex> vertices = {};
    std::vector<unsigned int> indices = {};
    std::vector<types::texture> textures = {};
    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;
 
  public:
    builder &set_vertices(std::vector<types::vertex> vertices);
    builder &set_indices(std::vector<unsigned int> indices);
    builder &set_textures(std::vector<types::texture> textures);
    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);
 
    mesh build();
};
 
} // namespace brenta