Combines two polygons into one using the Boolean 'and' operation.
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].
Syntax 
Description 

V3 = polyand(V1,V2); 
Returns a new polygon, V3, that is the 'and' of V1 and V2. 
Example
In this example, we create two polygons and then show how the different Boolean operations can be done. We set up a mesh and use the inpoly function so that we can image the polygons and easily see the result.
# set up a mesh for imaging polygons with the inpoly command x = linspace(1,3,200); y = linspace(1,3,200); X = meshgridx(x,y); Y = meshgridy(x,y); # enter 2 polygons and the polygon boolean operations V1 = [ 0,0; 1,0; 1,1; 0,1]; V2 = [ 0,0; 2,2; 0,2]; V3 = polyand(V1,V2); V4 = polyor(V1,V2); V5 = polydiff(V1,V2); V6 = polydiff(V2,V1); V7 = polyxor(V2,V1); # image all the polygons image(x,y,inpoly(V1,X,Y),"x","y","V1"); image(x,y,inpoly(V2,X,Y),"x","y","V2"); image(x,y,inpoly(V3,X,Y),"x","y","V1 and V2"); image(x,y,inpoly(V4,X,Y),"x","y","V1 or V2"); image(x,y,inpoly(V5,X,Y),"x","y","V1  V2"); image(x,y,inpoly(V6,X,Y),"x","y","V2  V1"); image(x,y,inpoly(V7,X,Y),"x","y","V1 xor V2");
The results are shown in the following images







Note: Other 2D or 3D objects This command only works for 2D polygons. For other 2D or 3D objects, user may use the mesh order to combine multiple overlapped objects 
See Also
List of commands , polyor , polydiff , polyxor , polyarea , centroid , polyintersect , inpoly , polygrow , mesh order