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127 lines
3.7 KiB
127 lines
3.7 KiB
9 years ago
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/** @file */
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/* The MIT License
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*
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* Copyright (c) 2008, Naotoshi Seo <sonots(at)sonots.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef CV_RECT32FPOINTS_INCLUDED
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#define CV_RECT32FPOINTS_INCLUDED
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#include "cv.h"
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#include "cvaux.h"
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#include "cxcore.h"
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#include "cvrect32f.h"
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#include "cvcreateaffine.h"
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// CVAPI(void) cvRect32fPoints( CvRect32f rect, CvPoint2D32f pt[4],
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// CvPoint2D32f shear = cvPoint2D32f(0,0) );
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// CV_INLINE void cvBox32fPoints( CvBox32f box, CvPoint2D32f pt[4],
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// CvPoint2D32f shear = cvPoint2D32f(0,0) );
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// CV_INLINE void cvRectPoints( CvRect rect, CvPoint2D32f pt[4] );
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// cvBoxPoints
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/**
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* Find 4 corners of rectangle
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*
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* @code
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* x y
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* [0] 0 0
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* [1] 1 0
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* [2] 1 1
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* [3] 0 1
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* @endcode
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*
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* @param rect Rectangle parameters and rotation angle parameter
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* @param pt[4] Found 4 corners
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* @param shear Shear deformation parameter if you want
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* @see cvBoxPoints, cvBox32fPoints, cvRectPoints, cvRect32fPoints
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*/
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CVAPI(void) cvRect32fPoints( CvRect32f rect, CvPoint2D32f pt[4],
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CvPoint2D32f shear CV_DEFAULT(cvPoint2D32f(0,0)) )
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{
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if( shear.x == 0 && shear.y == 0 )
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{
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CvBox2D box2d = cvBox2DFromRect32f( rect );
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cvBoxPoints( box2d, pt );
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}
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else
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{
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CvMat* A = cvCreateMat( 2, 3, CV_32FC1 );
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cvCreateAffine( A, rect, shear );
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pt[0].x = 0; pt[0].y = 0;
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pt[1].x = 1; pt[1].y = 0;
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pt[2].x = 1; pt[2].y = 1;
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pt[3].x = 0; pt[3].y = 1;
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CvPoint2D32f tmp;
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for( int i = 0; i < 4; i++ )
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{
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tmp.x = cvmGet( A, 0, 0 ) * pt[i].x + cvmGet( A, 0, 1 ) * pt[i].y + cvmGet( A, 0, 2 );
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tmp.y = cvmGet( A, 1, 0 ) * pt[i].x + cvmGet( A, 1, 1 ) * pt[i].y + cvmGet( A, 1, 2 );
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pt[i].x = tmp.x;
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pt[i].y = tmp.y;
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}
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}
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}
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/**
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* Find 4 corners of box
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*
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* @code
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* x y
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* [0] 0 0
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* [1] 1 0
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* [2] 1 1
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* [3] 0 1
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* @endcode
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*
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* @param box Box structure
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* @param pt[4] Found 4 corners
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* @param shear Shear deformation parameters if you want
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* @see cvBoxPoints, cvBox32fPoints, cvRectPoints, cvRect32fPoints
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*/
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CV_INLINE void cvBox32fPoints( CvBox32f box, CvPoint2D32f pt[4],
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CvPoint2D32f shear CV_DEFAULT(cvPoint2D32f(0,0)) )
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{
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cvRect32fPoints( cvRect32fFromBox32f( box ), pt, shear );
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}
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/**
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* Find 4 corners of rectangle
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*
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* @code
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* x y
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* [0] 0 0
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* [1] 1 0
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* [2] 1 1
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* [3] 0 1
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* @endcode
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*
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* @param rect Rectangle parameter
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* @param pt[4] Found 4 points
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* @see cvBoxPoints, cvBox32fPoints, cvRectPoints, cvRect32fPoints
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*/
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CV_INLINE void cvRectPoints( CvRect rect, CvPoint2D32f pt[4] )
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{
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cvRect32fPoints( cvRect32fFromRect( rect ), pt );
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}
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#endif
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