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/**********************************************************************
* File: polyaprx.h (Formerly polygon.h)
* Description: Code for polygonal approximation from old edgeprog.
* Author: Ray Smith
* Created: Thu Nov 25 11:42:04 GMT 1993
*
* (C) Copyright 1993, Hewlett-Packard Ltd.
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
** http://www.apache.org/licenses/LICENSE-2.0
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*
**********************************************************************/
#ifndef POLYAPRX_H
#define POLYAPRX_H
#include "tessclas.h"
#include "poutline.h"
#include "coutln.h"
OUTLINE *tesspoly_outline( //old approximation
C_OUTLINE *c_outline, //input
float //xheight
);
EDGEPT *edgesteps_to_edgepts ( //convert outline
C_OUTLINE * c_outline, //input
EDGEPT edgepts[] //output is array
);
void fix2( //polygonal approx
EDGEPT *start, /*loop to approimate */
int area);
EDGEPT *poly2( //second poly
EDGEPT *startpt, /*start of loop */
int area /*area of blob box */
);
void cutline( //recursive refine
EDGEPT *first, /*ends of line */
EDGEPT *last,
int area /*area of object */
);
#define fixed_dist 20 //really an int_variable
#define point_diff(p,p1,p2) (p).x = (p1).x - (p2).x ; (p).y = (p1).y - (p2).y
#define CROSS(a,b) ((a).x * (b).y - (a).y * (b).x)
#define LENGTH(a) ((a).x * (a).x + (a).y * (a).y)
#endif
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