# Knowledge Base

 Navigation: Scripting Language > Functions polyintersect

Determines if two polygons intersect.

The polygon vertices are contained in a single matrix of dimension Nx2 (or 2xN), where N >= 3 is the number of vertices. The dimension 2 corresponds to the x,y positions. For example, a square of side length 1 can be described by V = [ 0,0; 1,0; 1,1; 0,1] or V = [ 0,1,1,0;0,0,1,1].

 Supported Product: FDTD, MODE, DEVICE, INTERCONNECT

 Syntax Description out = polyintersect(V1,V2); Returns •0 if the polygons do not overlap•0.5 if the polygons touch•1 if they overlap•2 if one polygon completely encloses the other

Example

The following example illustrates the different possible intersection situations for two polygons:

V1 = [ 0,0; 1,0; 1,1; 0,1];

V2 = [ 0,0; 2,0; 2,2; 0,1];

?polyintersect(V1,V2);

result:

?polyintersect(V1,V2+0.5); #Shift V2 to the right by 0.5

result:

?polyintersect(V1,V2+1); #Shift V2 to the right by 1

result:

0.5

?polyintersect(V1,V2+2); #Shift V2 to the right by 2

result:

0