+++ /dev/null
-/* the script demostrates iterative construction of\r
- delaunay triangulation and voronoi tesselation */\r
-\r
-CvSubdiv2D* init_delaunay( CvMemStorage* storage,\r
- CvRect rect )\r
-{\r
- CvSubdiv2D* subdiv;\r
- \r
- subdiv = cvCreateSubdiv2D( CV_SEQ_KIND_SUBDIV2D, sizeof(*subdiv),\r
- sizeof(CvSubdiv2DPoint),\r
- sizeof(CvQuadEdge2D),\r
- storage );\r
- cvInitSubdivDelaunay2D( subdiv, rect );\r
- \r
- return subdiv;\r
-}\r
-\r
-\r
-void draw_subdiv_point( IplImage* img, CvPoint2D32f fp, int color )\r
-{\r
- cvCircle( img, cvPoint(cvRound(fp.x), cvRound(fp.y)), 3, color, CV_FILLED ); \r
-}\r
-\r
-\r
-void draw_subdiv_edge( IplImage* img, CvSubdiv2DEdge edge, int color )\r
-{\r
- CvSubdiv2DPoint* org_pt;\r
- CvSubdiv2DPoint* dst_pt;\r
- CvPoint2D32f org;\r
- CvPoint2D32f dst;\r
- CvPoint iorg, idst;\r
- \r
- org_pt = cvSubdiv2DEdgeOrg(edge);\r
- dst_pt = cvSubdiv2DEdgeDst(edge);\r
- \r
- if( org_pt && dst_pt )\r
- {\r
- org = org_pt->pt;\r
- dst = dst_pt->pt;\r
- \r
- iorg = cvPoint( cvRound( org.x ), cvRound( org.y ));\r
- idst = cvPoint( cvRound( dst.x ), cvRound( dst.y ));\r
- \r
- cvLineAA( img, iorg, idst, color, 0 );\r
- }\r
-}\r
-\r
-\r
-void draw_subdiv( IplImage* img, CvSubdiv2D* subdiv,\r
- int delaunay_color, int voronoi_color )\r
-{\r
- CvSeqReader reader;\r
- int i, total = subdiv->edges->total;\r
- int elem_size = subdiv->edges->elem_size;\r
- int color;\r
- \r
- cvStartReadSeq( (CvSeq*)(subdiv->edges), &reader, 0 );\r
- \r
- for( i = 0; i < total; i++ )\r
- {\r
- CvQuadEdge2D* edge = (CvQuadEdge2D*)(reader.ptr);\r
- \r
- if( CV_IS_SET_ELEM_EXISTS( edge ))\r
- {\r
- draw_subdiv_edge( img, (CvSubdiv2DEdge)edge + 1, voronoi_color );\r
- draw_subdiv_edge( img, (CvSubdiv2DEdge)edge, delaunay_color );\r
- }\r
- \r
- CV_NEXT_SEQ_ELEM( elem_size, reader );\r
- }\r
-}\r
-\r
-\r
-void locate_point( CvSubdiv2D* subdiv, CvPoint2D32f fp, IplImage* img,\r
- int active_color )\r
-{\r
- CvSubdiv2DEdge e = 0;\r
- CvSubdiv2DEdge e0 = 0;\r
- CvSubdiv2DPoint* p = 0;\r
- CvSubdiv2DPointLocation location = cvSubdiv2DLocate( subdiv, fp, &e0, &p );\r
- \r
- if( e0 )\r
- {\r
- e = e0;\r
- do\r
- {\r
- draw_subdiv_edge( img, e, active_color );\r
- e = cvSubdiv2DGetEdge(e,CV_NEXT_AROUND_LEFT);\r
- }\r
- while( e != e0 );\r
- }\r
- \r
- draw_subdiv_point( img, fp, active_color );\r
-}\r
-\r
-\r
-void draw_subdiv_facet( IplImage* img, CvSubdiv2DEdge edge )\r
-{\r
- CvSubdiv2DEdge t = edge;\r
- int i, count = 0;\r
- CvPoint* buf = 0;\r
-\r
- // count number of edges in facet \r
- do\r
- {\r
- count++;\r
- t = cvSubdiv2DGetEdge( t, CV_NEXT_AROUND_LEFT );\r
- } while (t != edge );\r
- \r
- buf = (CvPoint*)malloc( count * sizeof(buf[0]));\r
- \r
- // gather points\r
- t = edge;\r
- for( i = 0; i < count; i++ )\r
- {\r
- CvSubdiv2DPoint* pt = cvSubdiv2DEdgeOrg( t );\r
- if( !pt ) break;\r
- buf[i] = cvPoint( cvRound(pt->pt.x), cvRound(pt->pt.y));\r
- t = cvSubdiv2DGetEdge( t, CV_NEXT_AROUND_LEFT );\r
- }\r
- \r
- if( i == count )\r
- {\r
- CvSubdiv2DPoint* pt = cvSubdiv2DEdgeDst( cvSubdiv2DRotateEdge( edge, 1 ));\r
- cvFillConvexPoly( img, buf, count, CV_RGB(rand(),rand(),rand()));\r
- cvPolyLineAA( img, &buf, &count, 1, 1, CV_RGB(0,0,0), 0);\r
- draw_subdiv_point( img, pt->pt, CV_RGB(0,0,0));\r
- }\r
- free( buf ); \r
-}\r
-\r
-void paint_voronoi( CvSubdiv2D* subdiv, IplImage* img )\r
-{\r
- CvSeqReader reader;\r
- int i, total = subdiv->edges->total;\r
- int elem_size = subdiv->edges->elem_size;\r
-\r
- cvCalcSubdivVoronoi2D( subdiv );\r
- \r
- cvStartReadSeq( (CvSeq*)(subdiv->edges), &reader, 0 );\r
- \r
- for( i = 0; i < total; i++ )\r
- {\r
- CvQuadEdge2D* edge = (CvQuadEdge2D*)(reader.ptr);\r
- \r
- if( CV_IS_SET_ELEM_EXISTS( edge ))\r
- {\r
- CvSubdiv2DEdge e = (CvSubdiv2DEdge)edge;\r
- // left\r
- draw_subdiv_facet( img, cvSubdiv2DRotateEdge( e, 1 ));\r
- \r
- // right\r
- draw_subdiv_facet( img, cvSubdiv2DRotateEdge( e, 3 ));\r
- }\r
- \r
- CV_NEXT_SEQ_ELEM( elem_size, reader );\r
- } \r
-}\r
-\r
-\r
-void run(void)\r
-{\r
- char win[] = "source";\r
- int i;\r
- int q_flag = 0;\r
- int draw_flag = 0;\r
- CvRect rect = { 0, 0, 600, 600 };\r
- CvMemStorage* storage;\r
- CvSubdiv2D* subdiv;\r
- IplImage* img;\r
- int active_facet_color, delaunay_color, voronoi_color, bkgnd_color;\r
- \r
- active_facet_color = CV_RGB( 255, 0, 0 );\r
- delaunay_color = CV_RGB( 0,0,0);\r
- voronoi_color = CV_RGB(0, 180, 0);\r
- bkgnd_color = CV_RGB(255,255,255);\r
- \r
- img = cvCreateImage( cvSize(rect.width,rect.height), 8, 3 );\r
- \r
- named_window( win, 0 );\r
- cvFillImage( img, bkgnd_color );\r
- \r
- storage = cvCreateMemStorage(0);\r
- subdiv = init_delaunay( storage, rect );\r
- \r
- printf("Delaunay triangulation will be build now interactively.\n"\r
- "To stop the process, press Escape\n\n"); \r
- \r
- for( i = 0; i < 200; i++ )\r
- {\r
- CvPoint2D32f fp = cvPoint2D32f( (float)(rand()%(rect.width-10)+5),\r
- (float)(rand()%(rect.height-10)+5));\r
- \r
- locate_point( subdiv, fp, img, active_facet_color );\r
- show_iplimage( win, img );\r
- \r
- q_flag = wait_key_ex( win, 100 ) == 27;\r
- if( q_flag ) break;\r
- \r
- cvSubdivDelaunay2DInsert( subdiv, fp );\r
- cvCalcSubdivVoronoi2D( subdiv );\r
- cvFillImage( img, bkgnd_color );\r
- draw_subdiv( img, subdiv, delaunay_color, voronoi_color );\r
- show_iplimage( win, img );\r
- \r
- q_flag = wait_key_ex( win, 100 ) == 27;\r
- if( q_flag ) break;\r
- }\r
- \r
- if( !q_flag ) wait_key( win );\r
- cvFillImage( img, bkgnd_color );\r
- paint_voronoi( subdiv, img );\r
- show_iplimage( win, img );\r
- \r
- cvReleaseMemStorage( &storage );\r
- cvReleaseImage(&img);\r
-}\r
-\r
-run();\r
-\r
-\r
-\r
-\r
-\r
projects / opencv / blobdiff