Comments (1)
i dont know how good is this, but seems working..
public bool IsPointInPolygon( Point p, Point[] polygon )
{
double minX = polygon[ 0 ].X;
double maxX = polygon[ 0 ].X;
double minY = polygon[ 0 ].Y;
double maxY = polygon[ 0 ].Y;
for ( int i = 1 ; i < polygon.Length ; i++ )
{
Point q = polygon[ i ];
minX = Math.Min( q.X, minX );
maxX = Math.Max( q.X, maxX );
minY = Math.Min( q.Y, minY );
maxY = Math.Max( q.Y, maxY );
}
if ( p.X < minX || p.X > maxX || p.Y < minY || p.Y > maxY )
{
return false;
}
// http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
bool inside = false;
for ( int i = 0, j = polygon.Length - 1 ; i < polygon.Length ; j = i++ )
{
if ( ( polygon[ i ].Y > p.Y ) != ( polygon[ j ].Y > p.Y ) &&
p.X < ( polygon[ j ].X - polygon[ i ].X ) * ( p.Y - polygon[ i ].Y ) / ( polygon[ j ].Y - polygon[ i ].Y ) + polygon[ i ].X )
{
inside = !inside;
}
}
return inside;
}
from pyvisgraph.
Related Issues (20)
- Performance testing HOT 1
- Progressbar output not functional for workers>1 HOT 2
- Suggestion: examples folder HOT 3
- Add Pyvisgraph documentation HOT 1
- Start or end point on polygon boundary HOT 1
- Requesting support for smaller distances HOT 1
- shortest path crossing the obstacle HOT 2
- is haversine distance in use? HOT 1
- Bug HOT 3
- Performance hit & js port HOT 3
- Outdated link to GSHHS shapefile for 1_build_graph_from_shapefiles.py: add this update and clarification
- Visibility graphs have a huge number of polygon crossings HOT 8
- IndexError HOT 1
- Visibility graph bug HOT 1
- Crash when vertices overlay HOT 2
- Is it possible to have a boundary polygon? HOT 2
- Detecting points on the edges of a polygon
- Extending to 3D possible?
- License file is not packaged in the PyPi tarball
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from pyvisgraph.