107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
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#ifdef _CH_
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#pragma package <opencv>
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#endif
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#define CV_NO_BACKWARD_COMPATIBILITY
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#ifndef _EiC
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#include "cv.h"
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#include "highgui.h"
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#include <stdlib.h>
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#endif
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#define ARRAY 1
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int main( int argc, char** argv )
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{
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IplImage* img = cvCreateImage( cvSize( 500, 500 ), 8, 3 );
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#if !ARRAY
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CvMemStorage* storage = cvCreateMemStorage(0);
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#endif
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cvNamedWindow( "hull", 1 );
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for(;;)
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{
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char key;
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int i, count = rand()%100 + 1, hullcount;
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CvPoint pt0;
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#if !ARRAY
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CvSeq* ptseq = cvCreateSeq( CV_SEQ_KIND_GENERIC|CV_32SC2, sizeof(CvContour),
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sizeof(CvPoint), storage );
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CvSeq* hull;
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for( i = 0; i < count; i++ )
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{
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pt0.x = rand() % (img->width/2) + img->width/4;
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pt0.y = rand() % (img->height/2) + img->height/4;
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cvSeqPush( ptseq, &pt0 );
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}
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hull = cvConvexHull2( ptseq, 0, CV_CLOCKWISE, 0 );
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hullcount = hull->total;
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#else
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CvPoint* points = (CvPoint*)malloc( count * sizeof(points[0]));
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int* hull = (int*)malloc( count * sizeof(hull[0]));
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CvMat pointMat = cvMat( 1, count, CV_32SC2, points );
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CvMat hullMat = cvMat( 1, count, CV_32SC1, hull );
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for( i = 0; i < count; i++ )
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{
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pt0.x = rand() % (img->width/2) + img->width/4;
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pt0.y = rand() % (img->height/2) + img->height/4;
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points[i] = pt0;
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}
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cvConvexHull2( &pointMat, &hullMat, CV_CLOCKWISE, 0 );
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hullcount = hullMat.cols;
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#endif
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cvZero( img );
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for( i = 0; i < count; i++ )
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{
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#if !ARRAY
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pt0 = *CV_GET_SEQ_ELEM( CvPoint, ptseq, i );
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#else
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pt0 = points[i];
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#endif
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cvCircle( img, pt0, 2, CV_RGB( 255, 0, 0 ), CV_FILLED, CV_AA, 0 );
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}
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#if !ARRAY
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pt0 = **CV_GET_SEQ_ELEM( CvPoint*, hull, hullcount - 1 );
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#else
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pt0 = points[hull[hullcount-1]];
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#endif
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for( i = 0; i < hullcount; i++ )
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{
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#if !ARRAY
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CvPoint pt = **CV_GET_SEQ_ELEM( CvPoint*, hull, i );
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#else
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CvPoint pt = points[hull[i]];
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#endif
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cvLine( img, pt0, pt, CV_RGB( 0, 255, 0 ), 1, CV_AA, 0 );
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pt0 = pt;
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}
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cvShowImage( "hull", img );
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key = (char) cvWaitKey(0);
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if( key == 27 || key == 'q' || key == 'Q' ) // 'ESC'
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break;
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#if !ARRAY
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cvClearMemStorage( storage );
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#else
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free( points );
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free( hull );
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#endif
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}
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cvDestroyWindow( "hull" );
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return 0;
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}
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#ifdef _EiC
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main(1,"convexhull.c");
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#endif
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