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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u0d1b 是根据这篇
论文编的matlab代码。
m8sd2&4 #Oka7.yz
__=53]jGE (/:m*x*6 哪位大神指点一下
@KQ>DBWQM clear;
;cMQ0e H=20;
"Zp&7hI a=100;
]Lv3XMa itheta=0;
MK1\ i=1;
"J(M. Y for theta=0:0.0001:pi/2
$d<NN2 if abs(integral(@(y)cos(y),itheta(i),theta)-1/a)<=0.00005
OZ&/&?!XE itheta(i+1)=theta;
J(]|)?x2 i=i+1;
Sn nfU end
gUklP(T=u end
+?J N_aR R=30;
PUR,r%K` r=0;
P< OH{l for i=1:a
#9,8{ O" r(i+1)=sqrt(R^2/a+r(i)^2);
q T6y& end
UoxlEec I(:,1)=sin(itheta);
[F6)Z[uG I(:,2)=cos(itheta);
^4`aONydl N=[0,1];
6KddHyFz P=[0,5];
D ,kxB~ O=[0,1];
u
W]gBhO$O n=1.5896;
qPDNDkjDD for i=1:a;
{$8+n:: 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) );
a_b#hM/c; P(i+1,2)= P(i+1,1) * I(i+1,2) / I(i+1,1);
6 f*:; O(i+1,1)=( r(i) - P(i+1,1) ) / sqrt( (r(i)-P(i+1,1))^2 + (H-P(i+1,2))^2);
1KZigeHXI O(i+1,2)=(H-P(i+1,2)) / sqrt( (r(i)-P(i+1,1))^2 + (H-P(i+1,2))^2 );
6kAAdy}ck N(i+1,=( O(i+1, - n*I(i+1,) / sqrt( 1 + n^2 - 2*n*dot(O(i+1,,I(i+1,) );
a2P)@R end
/EjXyrn2 P(:,3)=0;
C^ZoYf8+"m plot(P(:,1),P(:,2));
2Q e&FeT k8?._1t