`shrinkfaces`

Shrinks each face of a patch toward its center, leaving gaps between faces.

Category: Graphics > 2-D and 3-D Plots

Syntax

nfv = shrinkfaces(fv, sf)

Returns face and vertex data in which every face is scaled by sf.

shrinkfaces(p, sf)

Shrinks the faces of the patch with handle p in place.

Description

Each face is scaled about its own centroid. Because neighboring faces must move independently, the vertex list is rebuilt with one copy of the vertices per face. The result helps to see the individual faces of an isosurface or a mesh.

Input arguments

fv: Struct with fields faces and vertices, as returned by isosurface.
p: Handle of a patch object.
sf: Shrink factor between 0 and 1. A value of 0.5 halves each face; 1 leaves it unchanged.

Output arguments

nfv: Struct with faces and vertices. Each original face now owns its own vertices, so vertices are no longer shared between faces.

Example

Same number of faces, smaller faces

[x, y, z] = meshgrid(1:3);
fv = isosurface(x, y, z, x + y + z, 6);
fv2 = shrinkfaces(fv, 0.5);
disp(size(fv.faces, 1) == size(fv2.faces, 1))

Output

See also

isosurface patch reducepatch isocaps