light tools模拟时都是中心暗,周围有亮圆环。
模拟光源为朗伯点光源。
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aO' #!k*R }p)K6!J0 是根据这篇
论文编的matlab代码。
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iGyetFqKw t<H"J__& 哪位大神指点一下
Pe,>ny^J1 clear;
9zp!lw~;+ H=20;
4E$MhP
a=100;
wI.aV> itheta=0;
/5@YZ?|#2 i=1;
]eL# bJ for theta=0:0.0001:pi/2
%8'8XDq^8 if abs(integral(@(y)cos(y),itheta(i),theta)-1/a)<=0.00005
- x itheta(i+1)=theta;
+,Eam6g{ i=i+1;
[|(|"dh@^H end
DH(<{ #u end
t>j_C{X1( R=30;
!=[Y yh r=0;
"5hk%T' for i=1:a
_7Y
h[I4 r(i+1)=sqrt(R^2/a+r(i)^2);
1.3#PdMR, end
7)Toj I(:,1)=sin(itheta);
iU)I"#\l'k I(:,2)=cos(itheta);
?@64gdlwq N=[0,1];
W`>|OiuF P=[0,5];
Rh="<'d O=[0,1];
k&Pt\- 9on n=1.5896;
1/DtF for i=1:a;
'.A!IGsj P(i+1,1)=( N(i,1)*P(i,1) + N(i,2)*P(i,2) ) / ( N(i,1) + N(i,2)*I(i+1,2)/I(i+1,1) );
{U5sRM|I P(i+1,2)= P(i+1,1) * I(i+1,2) / I(i+1,1);
(v]%kXy/G O(i+1,1)=( r(i) - P(i+1,1) ) / sqrt( (r(i)-P(i+1,1))^2 + (H-P(i+1,2))^2);
y{<e4{
! O(i+1,2)=(H-P(i+1,2)) / sqrt( (r(i)-P(i+1,1))^2 + (H-P(i+1,2))^2 );
:'%6 N(i+1,=( O(i+1, - n*I(i+1,) / sqrt( 1 + n^2 - 2*n*dot(O(i+1,,I(i+1,) );
g4?2'G5m? end
X~{6$J|]#i P(:,3)=0;
-U|c~Cqc plot(P(:,1),P(:,2));
-cgO]q+Oq &^=Lr:I