72080e79e9
llmath::llround->ll_round LL_ICC->LL_INTELC Add llpredicate Add LL_CPP11 macro Remove llhash Update llinitparam, llsd and all relatives of it.
127 lines
3.7 KiB
C
127 lines
3.7 KiB
C
/**
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* @file llregionhandle.h
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* @brief Routines for converting positions to/from region handles.
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*
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* $LicenseInfo:firstyear=2002&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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#ifndef LL_LLREGIONHANDLE_H
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#define LL_LLREGIONHANDLE_H
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#include "indra_constants.h"
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#include "v3math.h"
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#include "v3dmath.h"
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inline U64 to_region_handle(const U32 x_origin, const U32 y_origin)
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{
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U64 region_handle;
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region_handle = ((U64)x_origin) << 32;
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region_handle |= (U64) y_origin;
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return region_handle;
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}
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inline U64 to_region_handle(const LLVector3d& pos_global)
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{
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U32 global_x = (U32)pos_global.mdV[VX];
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global_x -= global_x % 256;
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U32 global_y = (U32)pos_global.mdV[VY];
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global_y -= global_y % 256;
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return to_region_handle(global_x, global_y);
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}
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inline U64 to_region_handle_global(const F32 x_global, const F32 y_global)
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{
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// Round down to the nearest origin
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U32 x_origin = (U32)x_global;
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x_origin -= x_origin % REGION_WIDTH_U32;
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U32 y_origin = (U32)y_global;
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y_origin -= y_origin % REGION_WIDTH_U32;
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U64 region_handle;
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region_handle = ((U64)x_origin) << 32;
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region_handle |= (U64) y_origin;
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return region_handle;
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}
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inline BOOL to_region_handle(const F32 x_pos, const F32 y_pos, U64 *region_handle)
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{
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U32 x_int, y_int;
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if (x_pos < 0.f)
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{
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// LL_WARNS() << "to_region_handle:Clamping negative x position " << x_pos << " to zero!" << LL_ENDL;
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return FALSE;
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}
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else
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{
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x_int = (U32)ll_round(x_pos);
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}
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if (y_pos < 0.f)
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{
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// LL_WARNS() << "to_region_handle:Clamping negative y position " << y_pos << " to zero!" << LL_ENDL;
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return FALSE;
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}
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else
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{
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y_int = (U32)ll_round(y_pos);
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}
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*region_handle = to_region_handle(x_int, y_int);
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return TRUE;
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}
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// stuff the word-frame XY location of sim's SouthWest corner in x_pos, y_pos
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inline void from_region_handle(const U64 ®ion_handle, F32 *x_pos, F32 *y_pos)
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{
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*x_pos = (F32)((U32)(region_handle >> 32));
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*y_pos = (F32)((U32)(region_handle & 0xFFFFFFFF));
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}
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// stuff the word-frame XY location of sim's SouthWest corner in x_pos, y_pos
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inline void from_region_handle(const U64 ®ion_handle, U32 *x_pos, U32 *y_pos)
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{
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*x_pos = ((U32)(region_handle >> 32));
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*y_pos = ((U32)(region_handle & 0xFFFFFFFF));
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}
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// return the word-frame XY location of sim's SouthWest corner in LLVector3d
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inline LLVector3d from_region_handle(const U64 ®ion_handle)
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{
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return LLVector3d(((U32)(region_handle >> 32)), (U32)(region_handle & 0xFFFFFFFF), 0.f);
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}
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// grid-based region handle encoding. pass in a grid position
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// (eg: 1000,1000) and this will return the region handle.
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inline U64 grid_to_region_handle(const U32 grid_x, const U32 grid_y)
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{
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return to_region_handle(grid_x * REGION_WIDTH_UNITS,
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grid_y * REGION_WIDTH_UNITS);
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}
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inline void grid_from_region_handle(const U64& region_handle, U32* grid_x, U32* grid_y)
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{
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from_region_handle(region_handle, grid_x, grid_y);
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*grid_x /= REGION_WIDTH_UNITS;
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*grid_y /= REGION_WIDTH_UNITS;
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}
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#endif
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