+++ /dev/null
-#!/usr/bin/python
-"""
-the script demostrates iterative construction of
-delaunay triangulation and voronoi tesselation
-
-Original Author (C version): ?
-Converted to Python by: Roman Stanchak
-"""
-from opencv.cv import *
-from opencv.highgui import *
-from random import random,randint
-
-def draw_subdiv_point( img, fp, color ):
- cvCircle( img, cvPoint(cvRound(fp.x), cvRound(fp.y)), 3, color, CV_FILLED, 8, 0 );
-
-
-
-def draw_subdiv_edge( img, edge, color ):
- org_pt = cvSubdiv2DEdgeOrg(edge);
- dst_pt = cvSubdiv2DEdgeDst(edge);
-
- if org_pt and dst_pt :
-
- org = org_pt.pt;
- dst = dst_pt.pt;
-
- iorg = cvPoint( cvRound( org.x ), cvRound( org.y ));
- idst = cvPoint( cvRound( dst.x ), cvRound( dst.y ));
-
- cvLine( img, iorg, idst, color, 1, CV_AA, 0 );
-
-
-def draw_subdiv( img, subdiv, delaunay_color, voronoi_color ):
-
- total = subdiv.edges.total;
- elem_size = subdiv.edges.elem_size;
-
- for edge in subdiv.edges:
- edge_rot = cvSubdiv2DRotateEdge( edge, 1 )
-
- if( CV_IS_SET_ELEM( edge )):
- draw_subdiv_edge( img, edge_rot, voronoi_color );
- draw_subdiv_edge( img, edge, delaunay_color );
-
-
-def locate_point( subdiv, fp, img, active_color ):
-
- [res, e0, p] = cvSubdiv2DLocate( subdiv, fp );
-
- if e0:
- e = e0
- while True:
- draw_subdiv_edge( img, e, active_color );
- e = cvSubdiv2DGetEdge(e,CV_NEXT_AROUND_LEFT);
- if e == e0:
- break
-
- draw_subdiv_point( img, fp, active_color );
-
-
-def draw_subdiv_facet( img, edge ):
-
- t = edge;
- count = 0;
-
- # count number of edges in facet
- while count == 0 or t != edge:
- count+=1
- t = cvSubdiv2DGetEdge( t, CV_NEXT_AROUND_LEFT );
-
- buf = []
-
- # gather points
- t = edge;
- for i in range(count):
- assert t>4
- pt = cvSubdiv2DEdgeOrg( t );
- if not pt:
- break;
- buf.append( cvPoint( cvRound(pt.pt.x), cvRound(pt.pt.y) ) );
- t = cvSubdiv2DGetEdge( t, CV_NEXT_AROUND_LEFT );
-
- if( len(buf)==count ):
- pt = cvSubdiv2DEdgeDst( cvSubdiv2DRotateEdge( edge, 1 ));
- cvFillConvexPoly( img, buf, CV_RGB(randint(0,255),randint(0,255),randint(0,255)), CV_AA, 0 );
- cvPolyLine( img, [buf], 1, CV_RGB(0,0,0), 1, CV_AA, 0);
- draw_subdiv_point( img, pt.pt, CV_RGB(0,0,0));
-
-def paint_voronoi( subdiv, img ):
- total = subdiv.edges.total;
- elem_size = subdiv.edges.elem_size;
-
- cvCalcSubdivVoronoi2D( subdiv );
-
- for edge in subdiv.edges:
-
- if( CV_IS_SET_ELEM( edge )):
- # left
- draw_subdiv_facet( img, cvSubdiv2DRotateEdge( edge, 1 ));
-
- # right
- draw_subdiv_facet( img, cvSubdiv2DRotateEdge( edge, 3 ));
-
-if __name__ == '__main__':
- win = "source";
- rect = cvRect( 0, 0, 600, 600 );
-
- active_facet_color = CV_RGB( 255, 0, 0 );
- delaunay_color = CV_RGB( 0,0,0);
- voronoi_color = CV_RGB(0, 180, 0);
- bkgnd_color = CV_RGB(255,255,255);
-
- img = cvCreateImage( cvSize(rect.width,rect.height), 8, 3 );
- cvSet( img, bkgnd_color );
-
- cvNamedWindow( win, 1 );
-
- storage = cvCreateMemStorage(0);
- subdiv = cvCreateSubdivDelaunay2D( rect, storage );
-
- print "Delaunay triangulation will be build now interactively."
- print "To stop the process, press any key\n";
-
- for i in range(200):
- fp = cvPoint2D32f( random()*(rect.width-10)+5, random()*(rect.height-10)+5 )
-
- locate_point( subdiv, fp, img, active_facet_color );
- cvShowImage( win, img );
-
- if( cvWaitKey( 100 ) >= 0 ):
- break;
-
- cvSubdivDelaunay2DInsert( subdiv, fp );
- cvCalcSubdivVoronoi2D( subdiv );
- cvSet( img, bkgnd_color );
- draw_subdiv( img, subdiv, delaunay_color, voronoi_color );
- cvShowImage( win, img );
-
- if( cvWaitKey( 100 ) >= 0 ):
- break;
-
-
- cvSet( img, bkgnd_color );
- paint_voronoi( subdiv, img );
- cvShowImage( win, img );
-
- cvWaitKey(0);
-
- cvDestroyWindow( win );
projects / opencv / blobdiff