{"id":2992,"date":"2023-06-04T16:59:53","date_gmt":"2023-06-04T08:59:53","guid":{"rendered":"http:\/\/81.70.49.155\/?p=2992"},"modified":"2023-06-04T16:59:53","modified_gmt":"2023-06-04T08:59:53","slug":"%e5%9b%9b%e7%82%b9%e8%b6%8b%e8%bf%91%e5%85%b1%e9%9d%a2%e7%9a%84%e4%b8%89%e7%bb%b4%e7%a9%ba%e9%97%b4%e6%9e%84%e5%9e%8bmatlab%e4%bb%a3%e7%a0%81","status":"publish","type":"post","link":"http:\/\/81.70.49.155\/?p=2992","title":{"rendered":"\u56db\u70b9\u8d8b\u8fd1\u5171\u9762\u7684\u4e09\u7ef4\u7a7a\u95f4\u6784\u578bMATLAB\u4ee3\u7801"},"content":{"rendered":"

\n\t $\"\"$ \n<\/p>\n

\n\tclose;clc;clear
\nA=[0 0 0];
\nB=[0 1 0];
\nC=[0 1.9 0.3];
\nD=[0.2 2.8 0.9];<\/p>\n

\n%% 1 \u9996\u5148\u6c42\u5f97\u8f85\u52a9\u7684\u5404\u4e2a\u5355\u4f4d\u6cd5\u5411\u91cf
\nE=cross(B-A,C-A);%AB AC\u53c9\u4e58
\nE=E.\/norm(E); %\u5355\u4f4d\u6cd5\u5411\u91cf
\nF=cross(C-D,B-D); %DC DB\u53c9\u4e58
\nF=F.\/norm(F)+D;
\nF0=F-D;%\u5355\u4f4d\u6cd5\u5411\u91cf,\u6ce8\u610f\uff0c\u4f5c\u7528\u5728D\u70b9\u8981+D
\nm1=cross(F0,E); %\u4e24\u4e2a\u9762\u7684\u6cd5\u5411\u91cf\u53c9\u4e58
\nm1=m1.\/norm(m1); %\u5355\u4f4d\u5316
\nm2=C-B; %\u5411\u91cfBC
\nm2=m2.\/norm(m2); %\u5355\u4f4d\u5316<\/p>\n

\n%% 2 \u7528n1,n2\uff08\u4e24\u4e2a\u9762\u7684\u6cd5\u5411\u91cf\uff09\u6c42\u4e24\u4e2a\u76f8\u90bb\u9762\u5939\u89d2(\u7528\u00b0\u8868\u793a\u89d2\u5ea6)
\nn1=-F0; n2=E;
\ncetan=(acos(sum(n1.*n2)\/(0.0001+sum(n1.^2)^0.5*sum(n2.^2)^0.5)))\/pi*180<\/p>\n

\n%% 3 \u533a\u5206\u4e24\u4e2a\u9762\u7684\u5939\u89d2\u65b9\u5411
\n%1\/\u6c42\u4e24\u4e2a\u9762\u6cd5\u5411\u91cf\u53c9\u4e58\u7ed3\u679c\u4e0eBC\u7684\u5939\u89d2(\u7528\u00b0\u8868\u793a\u89d2\u5ea6)\uff0c\u8fdb\u800c\u83b7\u5f97sign
\nceta=(acos(sum(m1.*m2)\/(0.0001+sum(m1.^2)^0.5*sum(m2.^2)^0.5)))\/pi*180;
\nif ceta>=90,sign=-1,ceta, end %\u5982\u679c\u5939\u89d2\u4e3a\u987f\u89d2\uff0c sign=-1
\nif ceta<90, sign=1, ceta, end %\u5982\u679c\u5939\u89d2\u4e3a\u9510\u89d2\uff0c sign=1<\/p>\n

%% \u4ee5\u4e0b\u4e3a\u56fe\u50cf\u7684\u8f85\u52a9\u663e\u793a------------------------------------------
\nhold on
\nline([A(1),B(1)],[A(2),B(2)],[A(3),B(3)],'color','r');
\nline([B(1),C(1)],[B(2),C(2)],[B(3),C(3)],'color','r');
\nline([C(1),A(1)],[C(2),A(2)],[C(3),A(3)],'color','r');
\nline([C(1),D(1)],[C(2),D(2)],[C(3),D(3)],'color','b');
\nline([B(1),D(1)],[B(2),D(2)],[B(3),D(3)],'color','b');
\nfill3([A(1),B(1),C(1)],[A(2),B(2),C(2)],[A(3),B(3),C(3)],'g');
\nfill3([B(1),C(1),D(1)],[B(2),C(2),D(2)],[B(3),C(3),D(3)],'y');
\nline([A(1),E(1)],[A(2),E(2)],[A(3),E(3)],'color','m','linewidth',3);
\nline([A(1),F0(1)],[A(2),F0(2)],[A(3),F0(3)],'color','b','linewidth',3);
\nline([A(1),m1(1)],[A(2),m1(2)],[A(3),m1(3)],'color','c','linewidth',3);<\/p>\n

line([D(1),F(1)],[D(2),F(2)],[D(3),F(3)],'color','k','linewidth',3);<\/p>\n

text(A(1),A(2),A(3),'A');
\ntext(B(1),B(2),B(3),'B');
\ntext(C(1),C(2),C(3),'C');
\ntext(D(1),D(2),D(3),'D');
\ntext(E(1),E(2),E(3),'E');
\ntext(F(1),F(2),F(3),'F');
\ntext(F0(1),F0(2),F0(3),'F0');<\/p>\n

plot3(A(1),A(2),A(3),'ro');
\nplot3(B(1),B(2),B(3),'ro');
\nplot3(C(1),C(2),C(3),'ro');
\nplot3(D(1),D(2),D(3),'ro');
\nhold off;
\nview(10,15);
\naxis equal;
\ngrid on;<\/p>\n

<\/p>\n

<\/p>\n","protected":false},"excerpt":{"rendered":"