`rmholes`

Removes holes from a polyshape, leaving solid regions.

Category: Mathematics > Computational Geometry

Syntax

pshape = rmholes(pshape)

Fills every hole.

pshape = rmholes(pshape, I)

Fills only the holes selected by the index I.

Description

A rectangle of area 12 with a unit-square hole has area 11; after rmholes it has area 12 again and NumHoles is 0. The outer boundaries are untouched.

Input arguments

pshape: A polyshape object.
I: Index of the holes to fill, counted among the holes only.

Output arguments

pshape: The polyshape with the holes filled in.

Example

Fill the hole of a ring

P = polyshape([0 4 4 0], [0 0 3 3]);
H = polyshape([1 2 2 1], [1 1 2 2]);
D = subtract(P, H);
R = rmholes(D);
[area(D) area(R)]
R.NumHoles

Output

ans = 1×2

    11    12
ans = 0

rmholes