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xform2d.h
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1 /******************************************************************************
2 ** Filename: xform2d.h
3 ** Purpose: Definitions for using 2D point transformation library
4 ** Author: Dan Johnson
5 ** History: Fri Sep 22 09:57:08 1989, DSJ, Created.
6 **
7 ** (c) Copyright Hewlett-Packard Company, 1988.
8 ** Licensed under the Apache License, Version 2.0 (the "License");
9 ** you may not use this file except in compliance with the License.
10 ** You may obtain a copy of the License at
11 ** http://www.apache.org/licenses/LICENSE-2.0
12 ** Unless required by applicable law or agreed to in writing, software
13 ** distributed under the License is distributed on an "AS IS" BASIS,
14 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 ** See the License for the specific language governing permissions and
16 ** limitations under the License.
17 ******************************************************************************/
18 #ifndef XFORM2D_H
19 #define XFORM2D_H
20
24 #include "fpoint.h"
25
26 typedef struct
27 {
28 FLOAT32 a, b, c, d, tx, ty;
29 }
30
31
32 MATRIX_2D, *MATRIX_2D_PTR;
33
38 void InitMatrix(MATRIX_2D *M);
39 void CopyMatrix(MATRIX_2D *A, MATRIX_2D *B);
40
41 /* matrix scaling, translation, rotation, mirroring, etc.*/
42 void TranslateMatrix(MATRIX_2D *M, FLOAT32 X, FLOAT32 Y);
43 void ScaleMatrix(MATRIX_2D *M, FLOAT32 X, FLOAT32 Y);
44
45 void MirrorMatrixInX(MATRIX_2D *M);
46 void MirrorMatrixInY(MATRIX_2D *M);
47 void MirrorMatrixInXY(MATRIX_2D *M);
48
49 /* using a matrix to map points*/
50 FLOAT32 MapX(MATRIX_2D *M, FLOAT32 X, FLOAT32 Y);
51
52 FLOAT32 MapY(MATRIX_2D *M, FLOAT32 X, FLOAT32 Y);
53
54 void MapPoint(MATRIX_2D *M, const FPOINT &A, FPOINT* B);
55
56 FLOAT32 MapDx(MATRIX_2D *M, FLOAT32 DX, FLOAT32 DY);
57 FLOAT32 MapDy(MATRIX_2D M, FLOAT32 DX, FLOAT32 DY);
58
59 void RotateMatrix(MATRIX_2D_PTR Matrix, FLOAT32 Angle);
60 #endif