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 21 /**---------------------------------------------------------------------------- 22 Include Files and Type Defines 23 ----------------------------------------------------------------------------**/ 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 34 /**---------------------------------------------------------------------------- 35 Public Function Prototypes 36 ----------------------------------------------------------------------------**/ 37 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 61