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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 
33 
38 void InitMatrix(MATRIX_2D *M);
39 void CopyMatrix(MATRIX_2D *A, MATRIX_2D *B);
40 
41 /* matrix scaling, translation, rotation, mirroring, etc.*/
43 void ScaleMatrix(MATRIX_2D *M, FLOAT32 X, FLOAT32 Y);
44 
45 void MirrorMatrixInX(MATRIX_2D *M);
46 void MirrorMatrixInY(MATRIX_2D *M);
48 
49 /* using a matrix to map points*/
51 
53 
54 void MapPoint(MATRIX_2D *M, const FPOINT &A, FPOINT* B);
55 
58 
59  void RotateMatrix(MATRIX_2D_PTR Matrix, FLOAT32 Angle);
60 #endif