eval3dp
eval3dp — compute facets of a 3D parametric surface
Calling sequence
[Xf,Yf,Zf]=eval3dp(fun,p1,p2)
Parameters
| Xf,Yf,Zf | : matrices of size (4,n-1*m-1). Xf(:,i) ,Yf(:,i) and Zf(:,i) are respectively the x-axis, y-axis and z-axis coordinates of the 4 points of the ith four sided facet. |
| fun | : a Scilab function. |
| p1 | : a vector of size n. |
| p2 | : a vector of size m. |
Description
eval3dp computes a four sided facets representation of a 3D parametric surface
defined by the function fun. fun(p1,p2) computes the
x-axis ,y-axis and z-axis coordinates of the corresponding points on the
surface, as [x(i),y(i),z(i)]=fun(p1(i),p2(i)). This is used for efficiency.
Examples
p1=linspace(0,2*%pi,10);
p2=linspace(0,2*%pi,10);
deff("[x,y,z]=scp(p1,p2)",["x=p1.*sin(p1).*cos(p2)";..
"y=p1.*cos(p1).*cos(p2)";..
"z=p1.*sin(p2)"])
[Xf,Yf,Zf]=eval3dp(scp,p1,p2);
plot3d(Xf,Yf,Zf)
See also
genfac3d, plot3d
