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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Q 是根据这篇
论文编的matlab代码。
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1&JPyW 1PD{m{ 哪位大神指点一下
ztcV[{[g clear;
uOzol~TU) H=20;
50#iC@1 a=100;
$9!2c / itheta=0;
.v?x>iV i=1;
\':'8:E for theta=0:0.0001:pi/2
F<K;tt if abs(integral(@(y)cos(y),itheta(i),theta)-1/a)<=0.00005
lxIoP itheta(i+1)=theta;
zq1je2DB i=i+1;
tI42]:z end
zPzy0lx end
$]v=2j R=30;
-][~_Hd{ r=0;
$#VE C0 for i=1:a
>yr:L{{D}G r(i+1)=sqrt(R^2/a+r(i)^2);
v?Z30?_&h end
cR'l\iv+ I(:,1)=sin(itheta);
vS#Y,H:yAj I(:,2)=cos(itheta);
LhN?j5XqM N=[0,1];
]_!5g3VQh P=[0,5];
-MEp0 O=[0,1];
,E8:!r)6 n=1.5896;
gD}lDK6N for i=1:a;
GtR!a 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) );
0 &M~lJ P(i+1,2)= P(i+1,1) * I(i+1,2) / I(i+1,1);
sIUhk7Cd8 O(i+1,1)=( r(i) - P(i+1,1) ) / sqrt( (r(i)-P(i+1,1))^2 + (H-P(i+1,2))^2);
L|B/' O(i+1,2)=(H-P(i+1,2)) / sqrt( (r(i)-P(i+1,1))^2 + (H-P(i+1,2))^2 );
LqNt.d @ N(i+1,=( O(i+1, - n*I(i+1,) / sqrt( 1 + n^2 - 2*n*dot(O(i+1,,I(i+1,) );
O+iNR9O end
?4k/V6n@y P(:,3)=0;
lZ5LHUzP plot(P(:,1),P(:,2));
%rE:5) _C`&(?}