model.hpp

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/*
 * Copyright (C) 2023  Christopher J. Howard
 *
 * This file is part of Antkeeper source code.
 *
 * Antkeeper source code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Antkeeper source code is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Antkeeper source code.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef ANTKEEPER_RENDER_MODEL_HPP
#define ANTKEEPER_RENDER_MODEL_HPP
 
#include <engine/animation/skeleton.hpp>
#include <engine/geom/primitives/box.hpp>
#include <engine/gl/primitive-topology.hpp>
#include <engine/gl/vertex-array.hpp>
#include <engine/gl/vertex-buffer.hpp>
#include <engine/render/material.hpp>
#include <engine/utility/hash/fnv1a.hpp>
#include <cstdint>
#include <memory>
#include <string>
#include <vector>
 
namespace render {
 
struct model_group
{
    hash::fnv1a32_t id{};
    gl::primitive_topology primitive_topology{gl::primitive_topology::triangle_list};
    std::uint32_t first_vertex{};
    std::uint32_t vertex_count{};
    std::shared_ptr<render::material> material;
};
 
class model
{
public:
    using aabb_type = geom::box<float>;
    
    inline void set_vertex_offset(std::size_t offset) noexcept
    {
        m_vertex_offset = offset;
    }
    
    inline void set_vertex_stride(std::size_t stride) noexcept
    {
        m_vertex_stride = stride;
    }
    
    [[nodiscard]] inline const std::shared_ptr<gl::vertex_array>& get_vertex_array() const noexcept
    {
        return m_vertex_array;
    }
    [[nodiscard]] inline std::shared_ptr<gl::vertex_array>& get_vertex_array() noexcept
    {
        return m_vertex_array;
    }
    
    [[nodiscard]] inline const std::shared_ptr<gl::vertex_buffer>& get_vertex_buffer() const noexcept
    {
        return m_vertex_buffer;
    }
    [[nodiscard]] inline std::shared_ptr<gl::vertex_buffer>& get_vertex_buffer() noexcept
    {
        return m_vertex_buffer;
    }
    
    [[nodiscard]] inline constexpr std::size_t get_vertex_offset() const noexcept
    {
        return m_vertex_offset;
    }
    
    [[nodiscard]] inline constexpr std::size_t get_vertex_stride() const noexcept
    {
        return m_vertex_stride;
    }
    
    [[nodiscard]] inline const aabb_type& get_bounds() const noexcept
    {
        return m_bounds;
    }
    [[nodiscard]] inline aabb_type& get_bounds() noexcept
    {
        return m_bounds;
    }
    
    [[nodiscard]] inline const std::vector<model_group>& get_groups() const noexcept
    {
        return m_groups;
    }
    [[nodiscard]] inline std::vector<model_group>& get_groups() noexcept
    {
        return m_groups;
    }
    
    [[nodiscard]] inline const ::skeleton& get_skeleton() const noexcept
    {
        return m_skeleton;
    }
    [[nodiscard]] inline ::skeleton& get_skeleton() noexcept
    {
        return m_skeleton;
    }
    
private:
    std::shared_ptr<gl::vertex_array> m_vertex_array;
    std::shared_ptr<gl::vertex_buffer> m_vertex_buffer;
    std::size_t m_vertex_offset{};
    std::size_t m_vertex_stride{};
    aabb_type m_bounds{{0, 0, 0}, {0, 0, 0}};
    std::vector<model_group> m_groups;
    ::skeleton m_skeleton;
};
 
} // namespace render
 
#endif // ANTKEEPER_RENDER_MODEL_HPP