summaryrefslogtreecommitdiff
path: root/support/dktools/dk3bezcu.h
blob: e0243197ee15f6d89d1e0d4e14d313de559641ee (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
/*
Copyright (C) 2012-2020, Dirk Krause
SPDX-License-Identifier: BSD-3-Clause
*/

/*
	WARNING: This file was generated by the dkct program (see
	http://dktools.sourceforge.net/ for details).
	Changes you make here will be lost if dkct is run again!
	You should modify the original source and run dkct on it.
	Original source: dk3bezcu.ctr
*/

/**	@file dk3bezcu.h Header file for the dk3bezcu module.
*/

#ifndef DK3BEZCU_H_INCLUDED
/** Avoid multiple inclusions. */
#define DK3BEZCU_H_INCLUDED 1


#line 9 "dk3bezcu.ctr"

#ifdef __cplusplus
extern "C" {
#endif

/**	Bezier curve value calculation.
	@param	x0	Start point value.
	@param	xp	Value in control point near start.
	@param	xm	Value in control point near end.
	@param	x1	End point.
	@param	t	The t parameter.
	@param	ec	Pointer to error code variable, may be NULL.
	@return	Calculation result.
*/
double
dk3bezier_value(
  double x0, double xp, double xm, double x1, double t, int *ec
);

/**	Add Bezier curve segment to bounding box.
	@param	bb	Bounding box to modify.
	@param	x0	Start point x coordinate.
	@param	y0	Start point y coordinate.
	@param	xp	Control point near start x coordinate.
	@param	yp	Control point near start y coordinate.
	@param	xm	Control point near end x coordinate.
	@param	ym	Control point near end y coordinate.
	@param	x1	End point x coordinate.
	@param	y1	End point y coordinate.
	@param	ra	Half line width.
	@param	ec	Pointer to error code variable, may be NULL.
	@return	1 on success, 0 on error.
*/
int
dk3bezier_bb(
  dk3_bb_t	*bb,
  double	 x0,
  double	 y0,
  double	 xp,
  double	 yp,
  double	 xm,
  double	 ym,
  double	 x1,
  double	 y1,
  double	 ra,
  int		*ec
);

#ifdef __cplusplus
}
#endif


#endif