genfac3d

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.

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