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596 lines
17 KiB
C++
596 lines
17 KiB
C++
// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program 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 Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef CL_PRECIPITATION_CLIP_GRID_H
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#define CL_PRECIPITATION_CLIP_GRID_H
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#include "nel/3d/u_landscape.h"
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#include "nel/3d/u_visual_collision_manager.h"
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#include "nel/misc/traits_nl.h"
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#include "nel/misc/polygon.h"
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/*
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// *********************************************************************************
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template <class T> class CArray2D
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{
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public:
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typedef typename std::vector<T> TArrayContainer;
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typedef typename TArrayContainer::iterator iterator;
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typedef typename TArrayContainer::const_iterator const_iterator;
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CArray2D() : _Width(0), _Height(0) {}
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void init(uint width, uint height);
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void init(uint width, uint height, const T &defaultValue);
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bool empty() const { return _Array.empty(); }
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typename iterator begin() { return _Array.begin(); }
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typename iterator end() { return _Array.end(); }
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typename const_iterator begin() const { return _Array.begin(); }
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typename const_iterator end() const { return _Array.end(); }
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// access element by column/row
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T &operator()(uint x, uint y)
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{
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#ifdef NL_DEBUG
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nlassert(x < _Width);
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nlassert(y < _Height);
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#endif
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return _Array[x + y * _Width];
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}
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// access element by column/row (const version)
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const T &operator()(uint x, uint y) const
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{
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#ifdef NL_DEBUG
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nlassert(x < _Width);
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nlassert(y < _Height);
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#endif
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return _Array[x + y * _Width];
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}
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// Return width of array
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uint getWidth() const { return _Width; }
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// Return height of array
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uint getHeight() const { return _Height; }
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// Move array content of the given offset. No wrapping is applied
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// Example : move(1, 0) will move the array of one column to the left. The latest column is lost. The first column remains unchanged
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//
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void move(sint offsetX, sint offsetY);
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// Move a part of the array. Values are clamped as necessary
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void moveSubArray(sint dstX, sint dstY, sint srcX, sint srcY, sint width, sint height);
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// get an iterator to the start of a row
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iterator beginRow(uint row)
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{
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nlassert(row < _Height);
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return _Array.begin() + row * _Width;
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}
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const_iterator beginRow(uint row) const
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{
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nlassert(row < _Height);
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return _Array.begin() + row * _Width;
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}
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iterator endRow(uint row)
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{
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nlassert(row < _Height);
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return _Array.begin() + (row + 1) * _Width;
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}
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const_iterator endRow(uint row) const
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{
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nlassert(row < _Height);
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return _Array.begin() + (row + 1) * _Width;
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}
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// get an iterator at the given position
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iterator getIteratorAt(uint x, uint y)
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{
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#ifdef NL_DEBUG
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nlassert(x < _Width);
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nlassert(y < _Height);
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#endif
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return _Array.begin() + x + (y * _Width);
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}
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// Get a const iterator at the given position
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const iterator getIteratorAt(uint x, uint y) const
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{
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#ifdef NL_DEBUG
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nlassert(x < _Width);
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nlassert(y < _Height);
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#endif
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return _Array.begin() + x + (y * _Width);
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}
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// See which part of array should be updated after its content has been displaced by the given offset (by a call to move for example).
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// Example: getUpdateRects(0, 1, result) will result the first row as a result
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//
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void getUpdateRects(sint moveOffsetX, sint moveOffsetY, std::vector<CRect> &rectsToUpdate);
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// See which parts of array will be discarded if the array is displaced by the given offset
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void getDiscardRects(sint moveOffsetX, sint moveOffsetY, std::vector<CRect> &discardedRects);
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private:
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TArrayContainer _Array;
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uint _Width;
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uint _Height;
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private:
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inline void checkRect(const CRect &r) const
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{
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nlassert(r.X >= 0 && r.X < (sint32) _Width);
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nlassert(r.Y >= 0 && r.Y < (sint32) _Height);
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nlassert(r.X + r.Width >= 0 && r.X + (sint32) r.Width <= (sint32) _Width);
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nlassert(r.Y + r.Height >= 0 && r.Y + (sint32) r.Height <= (sint32) _Height);
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}
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};
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// *********************************************************************************
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template <class T>
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void CArray2D<T>::getUpdateRects(sint moveOffsetX, sint moveOffsetY, std::vector<CRect> &rectsToUpdate)
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{
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rectsToUpdate.clear();
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if (moveOffsetX < 0) // moved right ?
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{
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// the width to update
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uint width = std::min((uint) moveOffsetX, _Width);
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// the the grid moved top or bottom, exclude this part
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sint height = _Height - abs(moveOffsetY);
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if (height > 0)
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{
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nlwarning("*1");
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// complete column on the right
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rectsToUpdate.push_back(CRect((sint32) (_Width - width), (sint32) (std::max(- moveOffsetY, 0)), (uint32) width, (uint32) height));
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#ifdef NL_DEBUG
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checkRect(rectsToUpdate.back());
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#endif
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}
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}
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else if (moveOffsetX > 0) // moved left ?
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{
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// the width to update
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uint width = std::min((uint) (- moveOffsetX), _Width);
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// the the grid moved top or bottom.
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sint height = _Height - abs(moveOffsetY);
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if (height > 0)
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{
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//nlwarning("*2");
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// complete column on the right
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rectsToUpdate.push_back(CRect(0, (sint32) std::max(- moveOffsetY, 0), (uint32) width, (uint32) height));
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#ifdef NL_DEBUG
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checkRect(rectsToUpdate.back());
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#endif
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}
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}
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// update top or bottom part
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if (moveOffsetY < 0)
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{
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sint height = std::min((uint) moveOffsetY, _Height);
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//nlwarning("*3");
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rectsToUpdate.push_back(CRect(0, _Height - height, _Width, height));
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#ifdef NL_DEBUG
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checkRect(rectsToUpdate.back());
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#endif
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}
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else
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if (moveOffsetY > 0)
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{
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sint height = std::min((uint) (- moveOffsetY), _Height);
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//nlwarning("*4");
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rectsToUpdate.push_back(CRect(0, 0, _Width, height));
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#ifdef NL_DEBUG
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checkRect(rectsToUpdate.back());
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#endif
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}
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}
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// *********************************************************************************
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template <class T>
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void CArray2D<T>::getDiscardRects(sint moveOffsetX, sint moveOffsetY,std::vector<CRect> &discardedRects)
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{
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getUpdateRects(- moveOffsetX, - moveOffsetY, discardedRects);
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}
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// *********************************************************************************
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template <class T>
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void CArray2D<T>::moveSubArray(sint dstX, sint dstY, sint srcX, sint srcY, sint width, sint height)
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{
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if (srcX >= (sint) getWidth()) return;
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if (srcY >= (sint) getHeight()) return;
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if (dstX >= (sint) getWidth()) return;
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if (dstY >= (sint) getHeight()) return;
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if (srcX < 0)
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{
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width += srcX;
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if (width <= 0) return;
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srcX = 0;
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}
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if (srcY < 0)
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{
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height += srcY;
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if (height <= 0) return;
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srcY = 0;
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}
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if (srcX + width > (sint) getWidth())
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{
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width = getWidth() - srcX;
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}
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if (srcY + height > (sint) getHeight())
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{
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height = getHeight() - srcY;
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}
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if (dstX < 0)
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{
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width += dstX;
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if (width < 0) return;
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srcX -= dstX;
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dstX = 0;
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}
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if (dstY < 0)
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{
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height += dstY;
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if (height < 0) return;
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srcY -= dstY;
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dstY = 0;
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}
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if (dstX + width > (sint) getWidth())
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{
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width = getWidth() - dstX;
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}
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if (dstY + height > (sint) getHeight())
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{
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height = getHeight() - dstY;
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}
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#ifdef NL_DEBUG
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nlassert(width > 0);
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nlassert(height > 0);
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nlassert(srcX >= 0 && srcX < (sint) getWidth());
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nlassert(srcY >= 0 && srcY < (sint) getHeight());
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#endif
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if (dstY < srcY)
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{
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const_iterator src = getIteratorAt(srcX, srcY);
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iterator dst = getIteratorAt(dstX, dstY);
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do
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{
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if (CTraits<T>::SupportRawCopy)
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{
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// type support fast copy
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::memcpy(&(*dst), &(*src), sizeof(T) * width);
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}
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else
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{
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std::copy(src, src + width, dst);
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}
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src += _Width;
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dst += _Width;
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}
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while(--height);
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}
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else if (dstY > srcY)
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{
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// copy from top to bottom
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const_iterator src = getIteratorAt(srcX, srcY + height - 1);
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iterator dst = getIteratorAt(dstX, dstY + height - 1);
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do
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{
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if (CTraits<T>::SupportRawCopy)
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{
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// type support fast copy
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::memcpy(&(*dst), &(*src), sizeof(T) * width);
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}
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else
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{
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std::copy(src, src + width, dst);
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}
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src -= _Width;
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dst -= _Width;
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}
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while(--height);
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}
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else
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{
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const_iterator src = getIteratorAt(srcX, srcY);
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iterator dst = getIteratorAt(dstX, dstY);
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if (dstX < srcX)
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{
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do
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{
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if (CTraits<T>::SupportRawCopy)
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{
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// type support fast copy
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::memmove(&(*dst), &(*src), sizeof(T) * width);
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}
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else
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{
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std::reverse_copy(src, src + width, dst);
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}
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src += _Width;
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dst += _Width;
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}
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while(--height);
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}
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else
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{
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do
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{
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if (CTraits<T>::SupportRawCopy)
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{
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// type support fast copy
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::memcpy(&(*dst), &(*src), sizeof(T) * width);
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}
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else
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{
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std::copy(src, src + width, dst);
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}
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src += _Width;
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dst += _Width;
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}
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while(--height);
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}
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}
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}
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// *********************************************************************************
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template <class T>
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void CArray2D<T>::move(sint offsetX, sint offsetY)
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{
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moveSubArray(offsetX, offsetY, 0, 0, _Width, _Height);
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}
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// *********************************************************************************
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template <class T>
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void CArray2D<T>::init(uint width, uint height)
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{
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_Array.resize(width * height);
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_Width = width;
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_Height = height;
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}
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// *********************************************************************************
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template <class T>
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void CArray2D<T>::init(uint width,uint height, const T &defaultValue)
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{
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_Array.resize(width * height, defaultValue);
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_Width = width;
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_Height = height;
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}
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// *********************************************************************************
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// A height grid with wrapping
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class CHeightGridWrapped
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{
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public:
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class CGridElem
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{
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public:
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sint X;
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sint Y;
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float Z;
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public:
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bool operator == (const CGridElem &other) const
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{
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return X == other.X &&
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Y == other.Y &&
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Z == other.Z;
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}
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};
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typedef std::list<CGridElem> TGridElemList;
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// ctor
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CHeightGridWrapped();
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// Init with the given size
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// The size is required to be a power of 2
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void init(uint size, float cellSize);
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inline void insert(const CGridElem &ge);
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inline void remove(const CGridElem &ge);
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const TGridElemList &getGridElemList(sint x, sint y) const { return _Grid(x & _SizeMask, y & _SizeMask); }
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uint getSize() const { return _Grid.getWidth(); }
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// tmp for debug
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uint getListMaxLength() const;
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private:
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CArray2D<TGridElemList> _Grid;
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float _CellSize;
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float _InvCellSize;
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uint _SizeMask;
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};
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// *********************************************************************************
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inline void CHeightGridWrapped::insert(const CGridElem &ge)
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{
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_Grid(ge.X & _SizeMask, ge.Y & _SizeMask).push_back(ge);
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}
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// *********************************************************************************
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inline void CHeightGridWrapped::remove(const CGridElem &ge)
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{
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TGridElemList &gel = _Grid(ge.X & _SizeMask, ge.Y & _SizeMask);
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for(TGridElemList::iterator &it = gel.begin(); it != gel.end(); ++it)
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{
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if (*it == ge)
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{
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gel.erase(it);
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return;
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}
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}
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nlassert(0);
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}
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const float HEIGHT_GRID_MIN_Z = -10000.f;
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// A height grid that give approximate z of geometry near the viewer.
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// Useful to avoid precipitations in interiors / tunnels
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//
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class CHeightGrid : public NL3D::ULandscapeTileCallback
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{
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public:
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// ctor
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CHeightGrid();
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// Init the grid before first use
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// \param cellSize size of a cell of the height grid (in world unit)
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// \param cellSize heightGridSize width/height of the height grid. It must be a power of 2
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// \param cellSize wrappedHeightGridSize width/height of the wrapped height grid (for incoming geometry).
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// It must be a power of 2.
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// \param minZ Minimum possible Z
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//
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void init(float cellSize, uint heightGridSize, uint wrappedHeightGridSize, float minZ = HEIGHT_GRID_MIN_Z);
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void update(const CVector &newPos);
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// for debug, display the height grid on screen
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void display(NL3D::UDriver &drv) const;
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inline void gridCoordToWorld(sint x, sint y, CVector &dest) const;
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inline CVector gridCoordToWorld(sint x, sint y) const;
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// Remove a collision mesh (no op if not already added)
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void removeCollisionMesh(uint id);
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///////////////////////////////////////////////////////////////////////
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private:
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typedef std::map<uint, UVisualCollisionManager::CMeshInstanceColInfo> TColMeshMap;
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typedef std::vector<UVisualCollisionManager::CMeshInstanceColInfo> TColMeshVect;
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CHeightGridWrapped _ZGridWrapped;
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CArray2D<float> _ZGrid;
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float _CellSize;
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float _InvCellSize;
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float _MinZ;
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uint _GridSize;
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uint _SizeMask;
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sint _PosX;
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sint _PosY;
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std::vector<CRect> _UpdateRects;
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CHashMap<uint64, CTileAddedInfo> _TileInfos;
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CPolygon2D _Tri;
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CPolygon2D::TRasterVect _Rasters;
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TColMeshMap _Meshs; // meshs currenlty inserted in the wrapped grid
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TColMeshVect _UpdateMeshs; // mesh to be removed / added to the wrapped grid during the update (keep there to avoid vector allocation)
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std::vector<CVector> _CurrMeshVertices; // vertices of the mesh being inserted
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CAABBox _BBox; // bbox containing current grid
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private:
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void updateBBox();
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void updateRect(const CRect &rect);
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void discardRect(const CRect &rect);
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void updateCell(sint x, sint y);
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// from ULandscapeTileCallback
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virtual void tileAdded(const CTileAddedInfo &infos);
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virtual void tileRemoved(uint64 id);
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// add a tri in the height grid, and update height grid if necessary
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void addTri(const CVector2f corners[3], float z);
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void removeTri(const CVector2f corners[3], float z);
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// Add a collision mesh (doesn't test if already inserted)
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void addCollisionMesh(const UVisualCollisionManager::CMeshInstanceColInfo &colMesh);
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};
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// ***********************************************************************************
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inline void CHeightGrid::gridCoordToWorld(sint x, sint y, CVector &dest) const
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{
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dest.set(x * _CellSize, y * _CellSize, 0.f);
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}
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// ***********************************************************************************
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inline CVector CHeightGrid::gridCoordToWorld(sint x, sint y) const
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{
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CVector dest;
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gridCoordToWorld(x, y, dest);
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return dest;
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}
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// TMP TMP TMP TMP
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// TMP TMP TMP TMP
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// TMP TMP TMP TMP
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// TMP TMP TMP TMP
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extern CHeightGrid HeightGrid;
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*/
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/**
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* Class to know where precipitation can't fall
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* This is a grid that is updated with the position of the player
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* It tells when the quad is in an interior mesh, and gives the
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* mean height for a point of the quad (for landscape)
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* \author Nicolas Vizerie
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* \author Nevrax France
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* \date 2002
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*/
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class CPrecipitationClipGrid
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{
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public:
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/** Point of the grid
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*/
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struct CGridPoint
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{
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float MeanHeight; // The mean height that precipitation must use at this point
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bool Clipped; // True if clipped
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CGridPoint(float meanHeight = 0.f, bool clipped = true) : MeanHeight(meanHeight), Clipped(clipped)
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{}
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};
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public:
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// ctor
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CPrecipitationClipGrid();
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/** init the grid
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* \param size width & height of the grid so the grid has (size + 1) ^2 elements. For example if size is 1, the grid is a simple square and it has four corners.
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* \param gridEltSize width & height of a grid element.
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*/
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void initGrid(uint size, float gridEltSizeX, float gridEltSizeY);
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// Update the grid so that it match the position of the user. (this grid is centered at the user pos)
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void updateGrid(const NLMISC::CVector &userPos, NLPACS::UGlobalRetriever *globalRetriever);
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/** Get grid element point its grid coordinate in world
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* \return NULL if the element is outside the grid
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*/
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const CGridPoint *get(sint x, sint y) const;
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// for debug, display the clip grid on screen
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void display(NL3D::UDriver &drv) const;
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// Force the whole grid to be recomputed
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void touch() { _Touched = true; }
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/////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////
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private:
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typedef std::vector<CGridPoint> TGrid;
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private:
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bool _Touched;
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sint _XPos;
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sint _YPos;
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uint _Size;
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float _EltSizeX;
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float _EltSizeY;
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TGrid _Grid;
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private:
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void clear();
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void updateGridPart(sint worldX, sint worldY, uint gridX, uint gridY, uint width, uint height, NLPACS::UGlobalRetriever *globalRetriever);
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void updateGridElt(CGridPoint &dest, uint worldX, uint worldY);
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void moveGrid(sint offsetX, sint offsetY);
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void printGridValues() const;
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static TGrid::iterator getGridIt(TGrid &grid, uint x, uint y, uint size)
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{
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nlassert(size > 0);
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nlassert(x <= size);
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nlassert(y <= size);
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return grid.begin() + (x + (y * (size + 1)));
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}
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static TGrid::const_iterator getGridIt(const TGrid &grid, uint x, uint y, uint size)
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{
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nlassert(size > 0);
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nlassert(x <= size);
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nlassert(y <= size);
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return grid.begin() + (x + (y * (size + 1)));
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}
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};
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#endif
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