genfac3d

genfac3d — compute facets of a 3D surface

Calling sequence

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

`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.

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



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