用MATLAB绘制一个红灯笼
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PART.1 代码说明
这次留的空着实太小，标志就没咋画齐，大家如果有能力可以自己补全，这次的代码依旧使用了椭圆数据生成函数，不过不同的是这次是靠旋转矩阵构造数据点：
% 椭圆数据点生成函数
function [X,Y]=getEllipse(Mu,XR,YR,theta,pntNum)
% Mu | 中心点
% XR,YR | 旋转前X,Y半轴长度
% theta | 旋转角度
% pntNum | 生成数据点个数
tList=linspace(0,2*pi,pntNum);
X=cos(tList).*XR;
Y=sin(tList).*YR;
rotateMat=[cos(theta),-sin(theta);sin(theta),cos(theta)];
XY=rotateMat*[X;Y]+Mu(:);
X=XY(1,:);Y=XY(2,:);
end
这次代码还用到各种旋转过后的正弦函数，因此最后的局部函数还包含一个旋转数据的局部函数。
% 数据旋转角度
function [X,Y]=rotateData(X,Y,theta)
rotateMat=[cos(theta),-sin(theta);sin(theta),cos(theta)];
XY=rotateMat*[X;Y];
X=XY(1,:);Y=XY(2,:);
end
PART.2 完整代码
function xuerongrong
ax=gca;
ax.DataAspectRatio=[1 1 1];
ax.XLim=[-5 5];
ax.YLim=[-5 5];
hold(ax,'on')
% 绘制胳膊
[X,Y]=getEllipse([-1,-2.5],.4,.6,-pi/5,200);
fill(X,Y,[212,3,28]./255,'EdgeColor',[182,50,2]./255,'LineWidth',1.8)
[X,Y]=getEllipse([1.7,-1.89],.4,.6,pi/3.6,200);
fill(X,Y,[212,3,28]./255,'EdgeColor',[182,50,2]./255,'LineWidth',1.8)
% 绘制腿
rectangle('Position',[-.95,-4.2,1.3,1],'Curvature',.8,...
'FaceColor',[182,50,2]./255,'EdgeColor',[182,50,2]./255,'LineWidth',1.8)
rectangle('Position',[-1,-3.9,1.4,1],'Curvature',.8,...
'FaceColor',[246,168,68]./255,'EdgeColor',[246,168,68]./255,'LineWidth',1.8)
rectangle('Position',[-1,-3.8,1.4,1],'Curvature',.8,...
'FaceColor',[212,3,28]./255,'EdgeColor',[182,50,2]./255,'LineWidth',1.8)
rectangle('Position',[.5,-4.2,1.2,2],'Curvature',.8,...
'FaceColor',[182,50,2]./255,'EdgeColor',[182,50,2]./255,'LineWidth',1.8)
rectangle('Position',[.45,-3.9,1.3,2],'Curvature',.8,...
'FaceColor',[246,168,68]./255,'EdgeColor',[246,168,68]./255,'LineWidth',1.8)
rectangle('Position',[.45,-3.8,1.3,2],'Curvature',.8,...
'FaceColor',[212,3,28]./255,'EdgeColor',[182,50,2]./255,'LineWidth',1.8)
% 绘制身体
rectangle('Position',[-.9,-3.5,2.6,3],'Curvature',.6,...
'FaceColor',[212,3,28]./255,'EdgeColor',[212,3,28]./255,'LineWidth',1.8)
% 绘制头
[X0,Y0]=getEllipse([-.15,.65],2.9,2.3,pi/11,200);
fill(X0,Y0,[212,3,28]./255,'EdgeColor',[153,12,40]./255,'LineWidth',1.8)
[X,Y]=getEllipse([-.15,.65],2.7,2.3,pi/11,200);
plot(X,Y,'Color',[236,136,74]./255,'LineWidth',1.8)
[X,Y]=getEllipse([-.15,.65],1.7,2.3,pi/11,200);
plot(X,Y,'Color',[236,136,74]./255,'LineWidth',1.8)
X=linspace(0,pi,100);Y=sin(X);
X=X.*1.4;Y=Y.*0.2;
[X,Y]=rotateData(X,Y,-pi/11);
plot(Y+.41,X-1.46,'Color',[236,136,74]./255,'LineWidth',2)
plot(X0,Y0,'Color',[212,3,28]./255,'LineWidth',3)
% 绘制脸上的云
[X,Y]=getEllipse([-1.2,-.3],.5,.6,pi/3.4,200);
fill(X,Y,[250,250,250]./255,'EdgeColor',[250,250,250]./255,'LineWidth',1.8)
[X,Y]=getEllipse([-1.3,.4],.45,.55,-pi/3.4,200);
fill(X,Y,[250,250,250]./255,'EdgeColor',[250,250,250]./255,'LineWidth',1.8)
[X,Y]=getEllipse([-.65,1],.45,.7,-pi/4,200);
fill(X,Y,[250,250,250]./255,'EdgeColor',[250,250,250]./255,'LineWidth',1.8)
[X,Y]=getEllipse([0,1],.45,.7,-pi/4,200);
fill(X,Y,[250,250,250]./255,'EdgeColor',[250,250,250]./255,'LineWidth',1.8)
[X,Y]=getEllipse([1.8,.5],.4,.5,pi/5,200);
fill(X,Y,[250,250,250]./255,'EdgeColor',[250,250,250]./255,'LineWidth',1.8)
[X,Y]=getEllipse([1.63,.92],.4,.5,pi/12,200);
fill(X,Y,[250,250,250]./255,'EdgeColor',[250,250,250]./255,'LineWidth',1.8)
[X,Y]=getEllipse([.3,.25],1.6,1,pi/13,200);
fill(X,Y,[250,250,250]./255,'EdgeColor',[250,250,250]./255,'LineWidth',1.8)
[X,Y]=getEllipse([.95,1.42],.3,.3,pi/12,200);
fill(X,Y,[212,3,28]./255,'EdgeColor',[212,3,28]./255,'LineWidth',1.8)
% 绘制腮红
[X,Y]=getEllipse([-1.1,-.5],.35,.35,pi/12,200);
fill(X,Y,[212,3,28]./255,'EdgeColor','none','FaceAlpha',.2)
[X,Y]=getEllipse([-1.1,-.5],.32,.32,pi/12,200);
fill(X+3,Y+.9,[212,3,28]./255,'EdgeColor','none','FaceAlpha',.2)
% 绘制眼睛
[X,Y]=getEllipse([-.76,.16],.15,.24,pi/20,200);
fill(X,Y,[38,23,26]./255,'EdgeColor',[38,23,26]./255)
[X,Y]=getEllipse([1.25,.47],.15,.24,pi/20,200);
fill(X,Y,[38,23,26]./255,'EdgeColor',[38,23,26]./255)
[X,Y]=getEllipse([-.81,.21],.05,.05,pi/20,200);
fill(X,Y,[230,230,230]以上是关于用MATLAB绘制一个红灯笼的主要内容，如果未能解决你的问题，请参考以下文章