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Diffstat (limited to 'source/blender/blenlib/intern/rct.c')
-rw-r--r-- | source/blender/blenlib/intern/rct.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/source/blender/blenlib/intern/rct.c b/source/blender/blenlib/intern/rct.c new file mode 100644 index 00000000000..373edd1af5a --- /dev/null +++ b/source/blender/blenlib/intern/rct.c @@ -0,0 +1,115 @@ +/* + * + * rct.c + * + * april 95 + * + * $Id$ + * + * A minimalist lib for functions doing stuff with rectangle structs. + * + * ***** BEGIN GPL/BL DUAL LICENSE BLOCK ***** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. The Blender + * Foundation also sells licenses for use in proprietary software under + * the Blender License. See http://www.blender.org/BL/ for information + * about this. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): none yet. + * + * ***** END GPL/BL DUAL LICENSE BLOCK ***** + * + */ + +#include "DNA_vec_types.h" +#include "BLI_blenlib.h" + +int BLI_rcti_is_empty(rcti * rect) +{ + return ((rect->xmax<=rect->xmin) || + (rect->ymax<=rect->ymin)); +} + +int BLI_in_rcti(rcti * rect, int x, int y) +{ + + if(x<rect->xmin) return 0; + if(x>rect->xmax) return 0; + if(y<rect->ymin) return 0; + if(y>rect->ymax) return 0; + return 1; +} + +int BLI_in_rctf(rctf *rect, float x, float y) +{ + + if(x<rect->xmin) return 0; + if(x>rect->xmax) return 0; + if(y<rect->ymin) return 0; + if(y>rect->ymax) return 0; + return 1; +} + +void BLI_union_rctf(rctf *rct1, rctf *rct2) +{ + + if(rct1->xmin>rct2->xmin) rct1->xmin= rct2->xmin; + if(rct1->xmax<rct2->xmax) rct1->xmax= rct2->xmax; + if(rct1->ymin>rct2->ymin) rct1->ymin= rct2->ymin; + if(rct1->ymax<rct2->ymax) rct1->ymax= rct2->ymax; +} + +void BLI_init_rctf(rctf *rect, float xmin, float xmax, float ymin, float ymax) +{ + rect->xmin= xmin; + rect->xmax= xmax; + rect->ymin= ymin; + rect->ymax= ymax; +} + +int BLI_isect_rctf(rctf *src1, rctf *src2, rctf *dest) +{ + float xmin, xmax; + float ymin, ymax; + + xmin = (src1->xmin) > (src2->xmin) ? (src1->xmin) : (src2->xmin); + xmax = (src1->xmax) < (src2->xmax) ? (src1->xmax) : (src2->xmax); + ymin = (src1->ymin) > (src2->ymin) ? (src1->ymin) : (src2->ymin); + ymax = (src1->ymax) < (src2->ymax) ? (src1->ymax) : (src2->ymax); + + if(xmax>=xmin && ymax>=ymin) { + if(dest) { + dest->xmin = xmin; + dest->xmax = xmax; + dest->ymin = ymin; + dest->ymax = ymax; + } + return 1; + } + else { + if(dest) { + dest->xmin = 0; + dest->xmax = 0; + dest->ymin = 0; + dest->ymax = 0; + } + return 0; + } +} |