💿🐜 Antkeeper source code
https://antkeeper.com
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65 lines
2.5 KiB
65 lines
2.5 KiB
/*
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* Copyright (C) 2023 Christopher J. Howard
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*
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* This file is part of Antkeeper source code.
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*
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* Antkeeper source code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper source code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ANTKEEPER_GAME_TERRAIN_SYSTEM_HPP
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#define ANTKEEPER_GAME_TERRAIN_SYSTEM_HPP
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#include "game/systems/updatable-system.hpp"
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#include "game/components/terrain-component.hpp"
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#include <engine/entity/id.hpp>
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#include <engine/utility/image.hpp>
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#include <engine/math/transform.hpp>
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#include <engine/math/vector.hpp>
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#include <engine/render/model.hpp>
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#include <engine/render/material.hpp>
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#include <engine/geom/brep/brep-mesh.hpp>
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#include <memory>
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/**
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* Generates terrain patches and performs terrain patch LOD selection.
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*/
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class terrain_system: public updatable_system
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{
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public:
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explicit terrain_system(entity::registry& registry);
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~terrain_system();
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virtual void update(float t, float dt);
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/**
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* Generates terrain entities from a heightmap.
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*
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* @param heightmap Heightmap from which the terrain should be generated.
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* @param subdivisions Number of heightmap subdivisions on the x- and z-axes. Determines the number of terrain entities generated.
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* @param transform Translation, rotation, and scale of the terrain.
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* @param material Terrain material.
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*
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* @return Entity ID of the generated terrain grid.
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*
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* @except std::invalid_argument Failed to generate terrain from null heightmap.
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* @except std::runtime_error Heightmap size less than 2x2.
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* @except std::runtime_error Heightmap subdivision failed.
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*/
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entity::id generate(std::shared_ptr<image> heightmap, const math::uvec2& subdivisions, const math::transform<float>& transform, std::shared_ptr<render::material> material);
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private:
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[[nodiscard]] std::unique_ptr<render::model> generate_terrain_model(const geom::brep_mesh& mesh, std::shared_ptr<render::material> material, const math::uvec2& quad_dimensions) const;
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};
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#endif // ANTKEEPER_GAME_TERRAIN_SYSTEM_HPP
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