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https://gitea.wildfiregames.com/0ad/0ad
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157c6af18e
Avoid cases of filenames Update years in terms and other legal(ish) documents Don't update years in license headers, since change is not meaningful Will add linter rule in seperate commit Happy recompiling everyone! Original Patch By: Nescio Comment By: Gallaecio Differential Revision: D2620 This was SVN commit r27786.
82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
/* Copyright (C) 2020 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. 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 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Describes ground using heightmap mipmaps
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* Used for camera movement
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*/
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#ifndef INCLUDED_HEIGHTMIPMAP
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#define INCLUDED_HEIGHTMIPMAP
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#include <vector>
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class Path;
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using VfsPath = Path;
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struct SMipmap
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{
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SMipmap() : m_MapSize(0), m_Heightmap(0) { }
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SMipmap(size_t MapSize, u16* Heightmap) : m_MapSize(MapSize), m_Heightmap(Heightmap) { }
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size_t m_MapSize;
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u16* m_Heightmap;
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};
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class CHeightMipmap
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{
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NONCOPYABLE(CHeightMipmap);
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public:
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CHeightMipmap();
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~CHeightMipmap();
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void Initialize(size_t mapSize, const u16* ptr);
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void ReleaseData();
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// update the heightmap mipmaps
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void Update(const u16* ptr);
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// update a section of the heightmap mipmaps
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// (coordinates are heightmap cells, inclusive of lower bounds,
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// exclusive of upper bounds)
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void Update(const u16* ptr, size_t left, size_t bottom, size_t right, size_t top);
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float GetTrilinearGroundLevel(float x, float z, float radius) const;
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void DumpToDisk(const VfsPath& path) const;
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private:
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// get bilinear filtered height from mipmap
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float BilinearFilter(const SMipmap &mipmap, float x, float z) const;
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// update rectangle of the output mipmap by bilinear interpolating an input mipmap of exactly twice its size
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void HalfResizeUpdate(SMipmap &out_mipmap, size_t mapSize, const u16* ptr, size_t left, size_t bottom, size_t right, size_t top);
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// update rectangle of the output mipmap by bilinear interpolating the input mipmap
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void BilinearUpdate(SMipmap &out_mipmap, size_t mapSize, const u16* ptr, size_t left, size_t bottom, size_t right, size_t top);
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// size of this map in each direction
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size_t m_MapSize;
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// mipmap list
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std::vector<SMipmap> m_Mipmap;
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};
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#endif
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