Kent Mein
d0e346d544
#ifdef HAVE_CONFIG_H #include <config.h> #endif Just need to finish cpp files now :) Kent -- mein@cs.umn.edu
120 lines
2.8 KiB
C
120 lines
2.8 KiB
C
/*
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*
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* rct.c
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*
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* april 95
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*
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* $Id$
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*
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* A minimalist lib for functions doing stuff with rectangle structs.
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*
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* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version. The Blender
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* Foundation also sells licenses for use in proprietary software under
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* the Blender License. See http://www.blender.org/BL/ for information
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* about this.
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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 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 this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL/BL DUAL LICENSE BLOCK *****
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*
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*/
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#include "DNA_vec_types.h"
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#include "BLI_blenlib.h"
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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int BLI_rcti_is_empty(rcti * rect)
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{
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return ((rect->xmax<=rect->xmin) ||
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(rect->ymax<=rect->ymin));
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}
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int BLI_in_rcti(rcti * rect, int x, int y)
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{
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if(x<rect->xmin) return 0;
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if(x>rect->xmax) return 0;
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if(y<rect->ymin) return 0;
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if(y>rect->ymax) return 0;
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return 1;
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}
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int BLI_in_rctf(rctf *rect, float x, float y)
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{
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if(x<rect->xmin) return 0;
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if(x>rect->xmax) return 0;
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if(y<rect->ymin) return 0;
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if(y>rect->ymax) return 0;
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return 1;
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}
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void BLI_union_rctf(rctf *rct1, rctf *rct2)
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{
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if(rct1->xmin>rct2->xmin) rct1->xmin= rct2->xmin;
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if(rct1->xmax<rct2->xmax) rct1->xmax= rct2->xmax;
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if(rct1->ymin>rct2->ymin) rct1->ymin= rct2->ymin;
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if(rct1->ymax<rct2->ymax) rct1->ymax= rct2->ymax;
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}
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void BLI_init_rctf(rctf *rect, float xmin, float xmax, float ymin, float ymax)
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{
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rect->xmin= xmin;
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rect->xmax= xmax;
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rect->ymin= ymin;
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rect->ymax= ymax;
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}
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int BLI_isect_rctf(rctf *src1, rctf *src2, rctf *dest)
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{
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float xmin, xmax;
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float ymin, ymax;
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xmin = (src1->xmin) > (src2->xmin) ? (src1->xmin) : (src2->xmin);
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xmax = (src1->xmax) < (src2->xmax) ? (src1->xmax) : (src2->xmax);
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ymin = (src1->ymin) > (src2->ymin) ? (src1->ymin) : (src2->ymin);
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ymax = (src1->ymax) < (src2->ymax) ? (src1->ymax) : (src2->ymax);
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if(xmax>=xmin && ymax>=ymin) {
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if(dest) {
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dest->xmin = xmin;
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dest->xmax = xmax;
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dest->ymin = ymin;
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dest->ymax = ymax;
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}
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return 1;
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}
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else {
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if(dest) {
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dest->xmin = 0;
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dest->xmax = 0;
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dest->ymin = 0;
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dest->ymax = 0;
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}
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return 0;
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}
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}
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