gschem/include/stroke.h

   1 /*
   2    libstroke - a stroke interface library
   3    Copyright (c) 1996,1997,1998,1999,2000  Mark F. Willey, ETLA Technical
   4
   5    Permission is hereby granted, free of charge, to any person obtaining
   6    a copy of this software and associated documentation files (the
   7    "Software"), to deal in the Software, including the rights to use, copy,
   8    modify, merge, publish, and distribute copies of the Software, and to
   9    permit persons to whom the Software is furnished to do so, subject to
  10    the following conditions:
  11
  12 This program is free software; you can redistribute it and/or
  13 modify it under the terms of the GNU General Public License
  14 as published by the Free Software Foundation; version 2.
  15
  16 This program is distributed in the hope that it will be useful,
  17 but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 GNU General Public License for more details.
  20
  21 You should have received a copy of the GNU General Public License
  22 along with this program; if not, write to the Free Software
  23 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  24
  25    The above copyright notice and this permission notice shall be included
  26    in all copies or substantial portions of the Software.
  27
  28    See the file "LICENSE" for a copy of the GNU GPL terms.
  29
  30    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  31    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  32    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  33    IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR
  34    OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  35    ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  36    OTHER DEALINGS IN THE SOFTWARE.
  37
  38    Except as contained in this notice, the name of the author shall
  39    name be used in advertising or otherwise to promote the sale, use or
  40    other dealings in this Software without prior written authorization
  41    from the author.
  42
  43    Non-GPL commercial use licenses are available - contact copyright holder.
  44
  45    Author: Mark F. Willey  --  willey@etla.net
  46    http://www.etla.net/
  47 */
  48
  49 /* largest number of points allowed to be sampled */
  50 #define STROKE_MAX_POINTS 10000
  51
  52 /* number of sample points required to have a valid stroke */
  53 #define STROKE_MIN_POINTS 50
  54
  55 /* maximum number of numbers in stroke */
  56 #define STROKE_MAX_SEQUENCE 20
  57
  58 /* threshold of size of smaller axis needed for it to define its own
  59    bin size */
  60 #define STROKE_SCALE_RATIO 4
  61
  62 /* minimum percentage of points in bin needed to add to sequence */
  63 #define STROKE_BIN_COUNT_PERCENT 0.07
  64
  65 /* translate stroke to sequence */
  66 int stroke_trans (char *sequence);
  67
  68 /* record point in stroke */
  69 void stroke_record (int x, int y);
  70
  71 /* initialize stroke functions */
  72 void stroke_init (void);