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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/*
* Transfo.h -- Header for common geometric routines.
*
* Authors : Patrick Lecoanet.
* Creation date :
*
* $Id$
*/
/*
* Copyright (c) 1993 - 2005 CENA, Patrick Lecoanet --
*
* See the file "Copyright" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
*/
#ifndef _Transfo_h
#define _Transfo_h
#include "Types.h"
#include <math.h>
#include <limits.h>
/*
* First subscript is matrix row, second is matrix column.
* So a[0][1] is upper right corner of matrix a and a[2][0]
* is lower left corner.
*/
typedef struct _ZnTransfo {
float _[3][2];
} ZnTransfo;
ZnTransfo *
ZnTransfoNew(void);
ZnTransfo *
ZnTransfoDuplicate(ZnTransfo *t);
void
ZnTransfoFree(ZnTransfo *t);
void
ZnPrintTransfo(ZnTransfo *t);
void
ZnTransfoSetIdentity(ZnTransfo *t);
ZnBool
ZnTransfoIsIdentity(ZnTransfo *t);
ZnTransfo *
ZnTransfoCompose(ZnTransfo *res,
ZnTransfo *t1,
ZnTransfo *t2);
ZnTransfo *
ZnTransfoInvert(ZnTransfo *t,
ZnTransfo *inv);
void
ZnTransfoDecompose(ZnTransfo *t,
ZnPoint *scale,
ZnPoint *trans,
ZnReal *rotation,
ZnReal *skewxy);
ZnBool
ZnTransfoEqual(ZnTransfo *t1,
ZnTransfo *t2,
ZnBool include_translation);
ZnBool
ZnTransfoHasSkew(ZnTransfo *t);
ZnBool
ZnTransfoIsTranslation(ZnTransfo *t);
ZnPoint *
ZnTransformPoint(ZnTransfo *t,
ZnPoint *p,
ZnPoint *xp);
void
ZnTransformPoints(ZnTransfo *t,
ZnPoint *p,
ZnPoint *xp,
unsigned int num);
ZnTransfo *
ZnTranslate(ZnTransfo *t,
ZnReal delta_x,
ZnReal delta_y,
ZnBool abs);
ZnTransfo *
ZnScale(ZnTransfo *t,
ZnReal scale_x,
ZnReal scale_y);
ZnTransfo *
ZnRotateRad(ZnTransfo *t,
ZnReal angle);
ZnTransfo *
ZnRotateDeg(ZnTransfo *t,
ZnReal angle);
ZnTransfo *
ZnSkewRad(ZnTransfo *t,
ZnReal skew_x,
ZnReal skew_y);
ZnTransfo *
ZnSkewDeg(ZnTransfo *t,
ZnReal skew_x,
ZnReal skew_y);
#endif /* _Transfo_h */
|
