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https://github.com/FWGS/xash3d-fwgs
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69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
/*
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world.c - common worldtrace routines
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Copyright (C) 2009 Uncle Mike
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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 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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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 General Public License for more details.
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*/
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#include "common.h"
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#include "world.h"
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#include "pm_defs.h"
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#include "mod_local.h"
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#include "xash3d_mathlib.h"
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#include "studio.h"
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/*
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==================
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World_TransformAABB
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==================
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*/
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void World_TransformAABB( matrix4x4 transform, const vec3_t mins, const vec3_t maxs, vec3_t outmins, vec3_t outmaxs )
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{
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vec3_t p1, p2;
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matrix4x4 itransform;
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int i;
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if( !outmins || !outmaxs ) return;
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Matrix4x4_Invert_Simple( itransform, transform );
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ClearBounds( outmins, outmaxs );
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// compute a full bounding box
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for( i = 0; i < 8; i++ )
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{
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p1[0] = ( i & 1 ) ? mins[0] : maxs[0];
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p1[1] = ( i & 2 ) ? mins[1] : maxs[1];
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p1[2] = ( i & 4 ) ? mins[2] : maxs[2];
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p2[0] = DotProduct( p1, itransform[0] );
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p2[1] = DotProduct( p1, itransform[1] );
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p2[2] = DotProduct( p1, itransform[2] );
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if( p2[0] < outmins[0] ) outmins[0] = p2[0];
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if( p2[0] > outmaxs[0] ) outmaxs[0] = p2[0];
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if( p2[1] < outmins[1] ) outmins[1] = p2[1];
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if( p2[1] > outmaxs[1] ) outmaxs[1] = p2[1];
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if( p2[2] < outmins[2] ) outmins[2] = p2[2];
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if( p2[2] > outmaxs[2] ) outmaxs[2] = p2[2];
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}
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// sanity check
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for( i = 0; i < 3; i++ )
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{
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if( outmins[i] > outmaxs[i] )
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{
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VectorClear( outmins );
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VectorClear( outmaxs );
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return;
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}
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}
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}
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