genfac3d

Compute facets of a 3D surface

Calling Sequence

[xx,yy,zz]=genfac3d(x,y,z,[mask])

Arguments

:xx,yy,zz matrices of size (4,n-1xm-1). xx(:,i) , yy(:,i) and

zz(:,i) are respectively the x-axis, y-axis and z-axis coordinates of the 4 points of the ith four sided facet.

: :x x-axis coordinates vector of size m. : :y y-axis coordinates vector of size n. : :z matrix of size (m,n). z(i,j) is the value of the surface at the

point (x(i),y(j)).

: :mask boolean optional matrix with same size as z used to select

the entries of z to be represented by facets.

:

Description

genfac3d computes a four sided facets representation of a 3D surface z=f(x,y) defined by x, y and z.

Sample

Examples

t=[0:0.3:2*%pi]';
z=`sin`_(t)*`cos`_(t');
[xx,yy,zz]=genfac3d(t,t,z);
`plot3d`_(xx,yy,zz)

See Also

• eval3dp compute facets of a 3D parametric surface
• plot3d 3D plot of a surface