如何利用Matlab绘制有趣图像

这篇文章主要介绍了如何利用Matlab绘制有趣图像，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。

1.随机樱花树

function sakura% @author:slandarer% 随机形状二叉树樱花树绘制hold on,axis equalaxis(0.5+[-10,50,0,50])set(gca,'xtick',[],'ytick',[],'xcolor','w','ycolor','w')set(gca,'color',[0.5020    0.5020    0.5020])length_trunk=6;width_trunk=4;k1=0.9;k2=0.8;number_branch=15;alp=pi/10;length_branch=k1*length_trunk;width_branch=k2*width_trunk;trunk=[12,0;12,length_trunk];plot(trunk(:,1),trunk(:,2),'color',[0 0 0],'Linewidth',width_trunk)begins=[trunk(2,:),pi/2,1];grow=begins;plotdata=[0 0 0 0 0 0 0 0];plotdata(1,:)=[];for i=1:number_branch    control=randi(25,[length(grow(:,1)),1])>=10;    ag=grow(:,3);    l=length(ag);    parta=[length_branch.*k1.^grow(:,4).*cos(ag+ones(l,1)*alp),length_branch.*k1.^grow(:,4).*sin(ag+ones(l,1)*alp),ones(l,1)*alp,ones(l,1)];    partb=[length_branch.*k1.^grow(:,4).*cos(ag-ones(l,1)*alp),length_branch.*k1.^grow(:,4).*sin(ag-ones(l,1)*alp),-ones(l,1)*alp,ones(l,1)];    parta2=[0.8.*length_branch.*k1.^grow(:,4).*cos(ag),0.8.*length_branch.*k1.^grow(:,4).*sin(ag),zeros(l,1),ones(l,1)];    partb2=[0.8.*length_branch.*k1.^grow(:,4).*cos(ag),0.8.*length_branch.*k1.^grow(:,4).*sin(ag),zeros(l,1),ones(l,1)];    parta=control.*parta+(1-control).*parta2;    partb=control.*partb+(1-control).*partb2;    parta=parta+grow;    partb=partb+grow;    congress=[parta;partb];    grow=[grow;grow];    judge=[grow,congress];    judge=unique(judge,'rows');    grow=judge(:,5:end);    plotdata=[plotdata;judge];endfor i=1:number_branch    temp_w=width_branch*0.8^i;    temp_branch=plotdata(plotdata(:,4)==i,:);    plx=[temp_branch(:,1),temp_branch(:,5)];    ply=[temp_branch(:,2),temp_branch(:,6)];    plx=plx';ply=ply';    plot(plx,ply,'color',[0 0 0]+i*[0.3020 0.3020 0.3020]./number_branch,'Linewidth',temp_w)endbloom_pos=plotdata(plotdata(:,8)==number_branch+1,[5,6]);scatter(bloom_pos(:,1),bloom_pos(:,2),10,'CData',[0.8549    0.6824    0.6824])bloom_pos=plotdata(plotdata(:,8)==number_branch,[5,6]);scatter(bloom_pos(:,1),bloom_pos(:,2),8,'CData',[0.7451    0.5961    0.5961].*0.97)end

2.苹果绘制

function appleG[u,v]=meshgrid(linspace(-pi,pi,100));XMesh=(1+cos(v)).*cos(u)+0.085.*cos(5.*u)+(0.994.*v./pi).^100;YMesh=(1+cos(v)).*sin(u);ZMesh=(6.*sin(v)+2.*cos(v)-2.9.*log(1-v./pi))./4.2;ax=gca;ax.DataAspectRatio=[1 1 1];hold on;grid onsurf(XMesh,YMesh,ZMesh,'FaceColor',[140,192,30]./255,'EdgeColor','none')view(45,25)h=light;h.Color=[1 1 1];h.Style='infinite';end

3.南瓜绘制

% 构造网格[t,p]=meshgrid(linspace(0,2*pi,200),linspace(0,pi-.05,200));% 二元分段函数foutline=@(t,p)(p<=.14).*90.*cos(7.*p)+(p>.14).*(cos(20.*t)+70).*(p.*(pi-p+.1)).^.2;% 球面坐标转化为X,Y,Zh=cos(p).*foutline(t,p);R=sin(p).*foutline(t,p);R=R;X=cos(t).*R;Y=sin(t).*R;% 颜色矩阵构造CMap=ones([size(t),3]);tMap=ones(size(t));c1=[253,158,3]./255;c2=[76,103,86]./255;for i=1:3    tMap(:,:)=c1(i);    tMap(p<=.14)=c2(i);    CMap(:,:,i)=tMap;endfigure()surf(X,Y,h,'CData',CMap,'EdgeColor',[0,0,0],'EdgeAlpha',.2)

4.一堆三角形绘制

function tritritri% @author:slandarerhold on,axis equalaxis([-10,10,-10,10])set(gca,'xtick',[],'ytick',[],'xcolor','w','ycolor','w')set(gca,'color','w')for N=1:5    drawTri([0,0],[cos(pi/2+2*N*pi/5),sin(pi/2+2*N*pi/5)].*5,...        [cos(pi/2+pi/5+2*N*pi/5),sin(pi/2+pi/5+2*N*pi/5)].*5,10)    drawTri([0,0],[cos(pi/2+2*N*pi/5),sin(pi/2+2*N*pi/5)].*5,...        [cos(pi/2-pi/5+2*N*pi/5),sin(pi/2-pi/5+2*N*pi/5)].*5,10)endL5=5/sin(pi/2-pi/10)*sin(pi/5);L5s=(5+L5)/sin(3*pi/10)*sin(3*pi/5);for N=1:5    drawPent([cos(pi/2+2*N*pi/5),sin(pi/2+2*N*pi/5)].*5,...        [cos(pi/2+2*N*pi/5),sin(pi/2+2*N*pi/5)].*(5+L5),...        [cos(pi/2+pi/10+2*N*pi/5),sin(pi/2+pi/10+2*N*pi/5)].*L5s,...        [cos(pi/2+pi/5+2*N*pi/5),sin(pi/2+pi/5+2*N*pi/5)].*(5+L5),...        [cos(pi/2+pi/5+2*N*pi/5),sin(pi/2+pi/5+2*N*pi/5)].*5,15)    drawPent([cos(pi/2+2*N*pi/5),sin(pi/2+2*N*pi/5)].*5,...        [cos(pi/2+2*N*pi/5),sin(pi/2+2*N*pi/5)].*(5+L5),...        [cos(pi/2-pi/10+2*N*pi/5),sin(pi/2-pi/10+2*N*pi/5)].*L5s,...        [cos(pi/2-pi/5+2*N*pi/5),sin(pi/2-pi/5+2*N*pi/5)].*(5+L5),...        [cos(pi/2-pi/5+2*N*pi/5),sin(pi/2-pi/5+2*N*pi/5)].*5,15)end% 功能函数=================================================================    function drawTri(A,B,C,times)        LW=1.2;        COLOR=[0 0 0];        k=1/6;        k2=0.8;        plot([A(1);B(1)],[A(2);B(2)],'color',COLOR,'Linewidth',LW)        plot([B(1);C(1)],[B(2);C(2)],'color',COLOR,'Linewidth',LW)        plot([C(1);A(1)],[C(2);A(2)],'color',COLOR,'Linewidth',LW)        for i=1:times            b=k*(C-B)+B;plot([A(1);b(1)],[A(2);b(2)],'color',COLOR,'Linewidth',LW);B=b;            pause(0.01)            c=k*(A-C)+C;plot([B(1);c(1)],[B(2);c(2)],'color',COLOR,'Linewidth',LW);C=c;            pause(0.01)            a=k*(B-A)+A;plot([C(1);a(1)],[C(2);a(2)],'color',COLOR,'Linewidth',LW);A=a;            pause(0.01)            LW=LW*k2;        end    end    function drawPent(A,B,C,D,E,times)        LW=1.2;        COLOR=[0 0 0];        k=1/4;        k2=0.9;        plot([A(1);B(1)],[A(2);B(2)],'color',COLOR,'Linewidth',LW)        plot([B(1);C(1)],[B(2);C(2)],'color',COLOR,'Linewidth',LW)        plot([C(1);D(1)],[C(2);D(2)],'color',COLOR,'Linewidth',LW)        plot([D(1);E(1)],[D(2);E(2)],'color',COLOR,'Linewidth',LW)        plot([E(1);A(1)],[E(2);A(2)],'color',COLOR,'Linewidth',LW)        for i=1:times            b=k*(C-B)+B;plot([A(1);b(1)],[A(2);b(2)],'color',COLOR,'Linewidth',LW);B=b;            pause(0.01)            c=k*(D-C)+C;plot([B(1);c(1)],[B(2);c(2)],'color',COLOR,'Linewidth',LW);C=c;            pause(0.01)            d=k*(E-D)+D;plot([C(1);d(1)],[C(2);d(2)],'color',COLOR,'Linewidth',LW);D=d;            pause(0.01)            e=k*(A-E)+E;plot([D(1);e(1)],[D(2);e(2)],'color',COLOR,'Linewidth',LW);E=e;            pause(0.01)            a=k*(B-A)+A;plot([E(1);a(1)],[E(2);a(2)],'color',COLOR,'Linewidth',LW);A=a;            pause(0.01)            LW=LW*k2;        end    endend

5.月饼绘制

function moonCake% @author:slandarerax=gca;hold(ax,'on');axis equalax.XLim=[-15,15];ax.YLim=[-15,15];CSet=[0.92 0.51 0.11;1 0.7 0.09;0.87 0.41 0.05];for i=[1:7,9,8]    if i==1        tt=linspace(0,-pi/16,100);    elseif i==9        tt=linspace(-pi+pi/16,-pi,100);    else        tt=linspace(-pi/16-(i-2)*pi/8,-pi/16-(i-1)*pi/8,100);    end    xSet=cos(tt).*(10+abs(cos(tt.*8)));    xMin=find(xSet==min(xSet));tt(xMin)    xMax=find(xSet==max(xSet));    t1=min([xMin(1),xMax(1)]);    t2=max([xMin(1),xMax(1)]);    xSet=cos(tt(t1:t2)).*(10+abs(cos(tt(t1:t2).*8)));    ySet=sin(tt(t1:t2)).*(10+abs(cos(tt(t1:t2).*8)))-3;    fill([xSet(1),xSet,xSet(end)],[ySet(1)+3,ySet,ySet(end)+3],CSet(mod(i,2)+1,:),'EdgeColor','none')        endt=linspace(0,2*pi,640);fill(cos(t).*(10+abs(cos(t.*8))),sin(t).*(10+abs(cos(t.*8))),CSet(1,:),'EdgeColor','none')plot(cos(t).*(9+abs(cos(t.*8))),sin(t).*(9+abs(cos(t.*8)))-0.3,'Color',CSet(3,:),'LineWidth',6)plot(cos(t).*8.7,sin(t).*8.7-0.3,'Color',CSet(3,:),'LineWidth',4)plot(cos(t).*(9+abs(cos(t.*8))),sin(t).*(9+abs(cos(t.*8))),'Color',CSet(2,:),'LineWidth',6)plot(cos(t).*8.7,sin(t).*8.7,'Color',CSet(2,:),'LineWidth',4)plot([0 0],[-7 7]-0.3,'Color',CSet(3,:),'LineWidth',4)plot([-7 7],[0 0]-0.3,'Color',CSet(3,:),'LineWidth',4)plot([0 0],[-7 7],'Color',CSet(2,:),'LineWidth',4)plot([-7 7],[0 0],'Color',CSet(2,:),'LineWidth',4)t4=linspace(0,pi/2,100);xSet4=[cos(t4).*6+1,1,6,cos(t4(1:end-12)).*5+1,2,4.8,cos(t4(17:end-40)).*3.9+1];ySet4=[sin(t4).*6+1,1,1,sin(t4(1:end-12)).*5+1,2,2,sin(t4(17:end-40)).*3.9+1];plot(xSet4,ySet4-0.3,'Color',CSet(3,:),'LineWidth',4)plot(-xSet4,ySet4-0.3,'Color',CSet(3,:),'LineWidth',4)plot(xSet4,-ySet4-0.3,'Color',CSet(3,:),'LineWidth',4)plot(-xSet4,-ySet4-0.3,'Color',CSet(3,:),'LineWidth',4)plot(xSet4,ySet4,'Color',CSet(2,:),'LineWidth',4)plot(-xSet4,ySet4,'Color',CSet(2,:),'LineWidth',4)plot(xSet4,-ySet4,'Color',CSet(2,:),'LineWidth',4)plot(-xSet4,-ySet4,'Color',CSet(2,:),'LineWidth',4)end

6.大钻石绘制

function diamondx2% @author:slandarerhold onax=gca;axis equalgrid onax.GridLineStyle='--';ax.LineWidth=1.2;ax.XLim=[-2,2];ax.YLim=[-2,2];ax.ZLim=[-1.8,1.5];ax.XColor=[1,1,1].*0.4;ax.YColor=[1,1,1].*0.4;ax.ZColor=[1,1,1].*0.4;ax.DataAspectRatio=[1,1,1];ax.DataAspectRatioMode='manual';ax.CameraPosition=[-67.6287 -204.5276   82.7879];light('Position',[5,6,5])light('Position',[5,6,5])faceColor=[0 71 177];facePara={faceColor./255,'FaceAlpha',0.4,'EdgeColor',faceColor./255.*0.8,'EdgeAlpha',0.2,...      'FaceLighting','gouraud','EdgeLighting','gouraud',...      'SpecularStrength',0.9,'DiffuseStrength',0.8,'AmbientStrength',0.7}; % 面参数 drawDiamond(facePara)faceColor=[237 64 153];facePara={faceColor./255,'FaceAlpha',0.4,'EdgeColor',faceColor./255.*0.8,'EdgeAlpha',0.2,...      'FaceLighting','gouraud','EdgeLighting','gouraud',...      'SpecularStrength',0.9,'DiffuseStrength',0.8,'AmbientStrength',0.7}; % 面参数 drawDiamond(facePara)     function drawDiamond(facePara)                thetaSet8=linspace(0,2*pi-pi/4,8)';        thetaSet16=linspace(0,2*pi-pi/8,16)';                % 绘制最上方八边形        pntSet1=[cos(thetaSet8),sin(thetaSet8),ones(8,1)];        fill3(pntSet1(:,1),pntSet1(:,2),pntSet1(:,3),facePara{:})                % 一圈8个三角形        pntSet2=[cos(thetaSet8+pi/8).*1.3,sin(thetaSet8+pi/8).*1.3,ones(8,1).*0.7];        for i=1:8            p1=i;            p2=mod(i,8)+1;            p3=i;            fill3([pntSet1([p1,p2],1);pntSet2(p3,1)],...                [pntSet1([p1,p2],2);pntSet2(p3,2)],...                [pntSet1([p1,p2],3);pntSet2(p3,3)],facePara{:})        end                % 一圈8个四边形        pntSet3=[cos(thetaSet8).*1.7,sin(thetaSet8).*1.7,ones(8,1).*0.3];        for i=1:8            p1=mod(i,8)+1;            p2=i;            p3=p1;            p4=p1;            fill3([pntSet1(p1,1);pntSet2(p2,1);pntSet3(p3,1);pntSet2(p4,1)],...                [pntSet1(p1,2);pntSet2(p2,2);pntSet3(p3,2);pntSet2(p4,2)],...                [pntSet1(p1,3);pntSet2(p2,3);pntSet3(p3,3);pntSet2(p4,3)],facePara{:})        end                % 一圈16个三角形        pntSet4=[cos(thetaSet16).*1.7,sin(thetaSet16).*1.7,ones(16,1).*0.3];        for i=1:8            p1=i;            p2=2*i-1;            p3=2*i;            fill3([pntSet2(p1,1);pntSet4([p2,p3],1)],...                [pntSet2(p1,2);pntSet4([p2,p3],2)],...                [pntSet2(p1,3);pntSet4([p2,p3],3)],facePara{:})            p2=2*i;            p3=mod(2*i,16)+1;            fill3([pntSet2(p1,1);pntSet4([p2,p3],1)],...                [pntSet2(p1,2);pntSet4([p2,p3],2)],...                [pntSet2(p1,3);pntSet4([p2,p3],3)],facePara{:})        end                % 一圈16个四边角形        pntSet5=[cos(thetaSet16).*1.7,sin(thetaSet16).*1.7,ones(16,1).*0.15];        for i=1:16            p1=i;p2=mod(i,16)+1;            p3=mod(i,16)+1;p4=i;            fill3([pntSet4(p1,1);pntSet4(p2,1);pntSet5(p3,1);pntSet5(p4,1)],...                [pntSet4(p1,2);pntSet4(p2,2);pntSet5(p3,2);pntSet5(p4,2)],...                [pntSet4(p1,3);pntSet4(p2,3);pntSet5(p3,3);pntSet5(p4,3)],facePara{:})        end        pntSet6=[cos(thetaSet8+pi/8).*0.4,sin(thetaSet8+pi/8).*0.4,ones(8,1).*(-1.15)];                % 一圈16个长三角形        for i=1:8            p1=i;            p2=2*i-1;            p3=2*i;            fill3([pntSet6(p1,1);pntSet5([p2,p3],1)],...                [pntSet6(p1,2);pntSet5([p2,p3],2)],...                [pntSet6(p1,3);pntSet5([p2,p3],3)],facePara{:})            p2=2*i;            p3=mod(2*i,16)+1;            fill3([pntSet6(p1,1);pntSet5([p2,p3],1)],...                [pntSet6(p1,2);pntSet5([p2,p3],2)],...                [pntSet6(p1,3);pntSet5([p2,p3],3)],facePara{:})        end                % 一圈8个长四边形        pntSet7=[cos(thetaSet8).*1.7,sin(thetaSet8).*1.7,ones(8,1).*0.15];        for i=1:8            p1=mod(i,8)+1;            p2=i;            p4=mod(i,8)+1;            fill3([pntSet7(p1,1);pntSet6(p2,1);0;pntSet6(p4,1)],...                [pntSet7(p1,2);pntSet6(p2,2);0;pntSet6(p4,2)],...                [pntSet7(p1,3);pntSet6(p2,3);-1.5;pntSet6(p4,3)],facePara{:})                    end    endend

7.有趣曲线1

% 鱼形曲线hold onaxis equalgrid onX=0:1:1023;Y=0:1:1023;[gridX,gridY]=meshgrid(X,Y);FishPatternFcn=@(x,y)mod(abs(x.*sin(sqrt(x))+y.*sin(sqrt(y))).*pi./1024,1);contour(gridX,gridY,FishPatternFcn(gridX,gridY),[0.7,0.7])

8.有趣曲线2

% 生成一个40x40 DFT矩阵% 并在复平面将点连接起来plot(fft(eye(40)));axis equal

9.有趣曲线3——蝴蝶曲线

x=linspace(0,2*pi,1000);hdl=polarplot(x,sin(x)+sin(3.5.*x).^3,'LineWidth',1.5);ax=gca;ax.RTick=[];

10.有趣曲线4——心形曲线

function loveFunc% @author:slandarerLoveFunchdl=@(x,a)(x.^2).^(1/3)+0.9.*((3.3-x.^2).^(1/2)).*sin(a.*pi.*x);hold ongrid onaxis([-3 3,-2 4])x=-1.8:0.01:1.8;text(0,3.3,'$f(x)=x^{\frac{2}{3}}+0.9(3.3-x^2)^{\frac{1}{2}}\sin(\alpha\pi x)$',...    'FontSize',13,'HorizontalAlignment','center','Interpreter','latex');txt2=text(-0.35,2.9,'','FontSize',13,'HorizontalAlignment','left','Interpreter','latex','tag','alphadata');hdl=plot(x,LoveFunchdl(x,1),'color',[0.2118 0.4667 0.9961],'LineWidth',1.5);for a=1:0.01:20    AlphaString=['$\alpha=',num2str(a),'$'];    Color=([1.0000 0.4902 0.6627]-[0.2118 0.4667 0.9961]).*(a/20)+[0.2118 0.4667 0.9961];    set(txt2,'string',AlphaString)    hdl.YData=LoveFunchdl(x,a);    hdl.Color=Color;    drawnowendend

11.有趣曲线5

[x,y]=meshgrid(-10:.01:10,-10:.01:10);cm=cos(cos(min(sin(x)+y,x+sin(y))))-cos(sin(max(sin(y)+x,y+sin(x))))>0;imshow(cm)

12.会害羞的含羞草

function mimose% @author:slandarer% =========================================================================% <构造含羞草叶子轮廓曲线>% 大体是画一个一个压扁倾斜的半圆弧拼在一起% 然后乘以一个类似弧形曲线让每片小叶子不一样长% 计算一个压扁倾斜的半圆弧曲线t1=0:pi/100:pi+2*pi/100;y=5*abs(sin(t1).^(1/2));y(t1>pi)=-y(t1>pi);t1=t1.*cos(pi/9)-y.*sin(pi/9);y=t1.*sin(pi/9)+y.*cos(pi/9);% 将多个压扁倾斜的半圆弧曲线拼接T=[];Y=[];for i=1:20    T=[T,(i-1)*(pi+2*pi/100)+t1];    Y=[Y,y];   end% 乘以一个类似弧形曲线让每片小叶子不一样长L=length(T);t2=linspace(pi/8,pi-2*pi/5,L);Y=Y.*sin(t2);% 旋转并调整比例X=T.*cos(pi)-Y.*sin(pi);Y=T.*sin(pi)+Y.*cos(pi);X=X-min(X);X=X.*0.8;Y=Y.*1.5;% 创建figure及axes=========================================================fig=figure('units','pixels',...        'position',[500 100 500 500],...        'Numbertitle','off',...        'Color',[1 1 1],...        'resize','off',...        'visible','on',...        'name','mimose',...         'menubar','none');ax=axes('Units','pixels',...        'parent',fig,...          'Color',[0.2667    0.4039    0.2745],...        'Position',[0 0 500 500],...        'XLim',[0 100],...        'YLim',[0 100],...        'XColor',[1 1 1],...        'YColor',[1 1 1]);hold(ax,'on')%plot(ax,X+20,Y+50)% 调用后面定义的函数绘图===================================================% 绘制树枝drawBranch([20,0],[50,10])drawBranch([20,0],[35,12])drawBranch([0,0],[15,45])drawBranch([4,0],[0,20])% 绘制树叶leaf.l1=drawLeaf([50,10]+1.*[cos(pi/1.7),sin(pi/1.7)],pi/1.7,X,Y,0.8,1);leaf.l2=drawLeaf([50,10]+1.*[cos(-pi/8),sin(-pi/8)],-pi/8,X,Y,0.8,1);leaf.l3=drawLeaf([50,10]+1.*[cos(pi/12),sin(pi/12)],pi/12,X,Y,1,1);leaf.l4=drawLeaf([50,10]+1.*[cos(pi/3),sin(pi/3)],pi/3,X,Y,1,1);leaf.l5=drawLeaf([0,45]+1.*[cos(pi/3),sin(pi/3)],pi/3,X,Y,1,1);leaf.l6=drawLeaf([0,30]+1.*[cos(pi/5),sin(pi/5)],pi/5,X,Y,1,1);% 绘制花朵flower.fl1=drawFlower([35,12]);flower.fl2=drawFlower([20,5]);% 鼠标移动回调=============================================================fps=25;mitimer=timer('ExecutionMode', 'fixedRate', 'Period',1/fps, 'TimerFcn', @miMove);start(mitimer)    % 花朵树叶回缩函数    function miMove(~,~)        for ii=1:6            if leaf.(['l',num2str(ii)]).ratio<1 %如果收缩率小于1则每隔一段时间+0.05，以下同理                leaf.(['l',num2str(ii)]).ratio=leaf.(['l',num2str(ii)]).ratio+0.05;            end            resetH(leaf.(['l',num2str(ii)]),X,Y); % 依据收缩率重新绘制叶子        end        for ii=1:2            if flower.(['fl',num2str(ii)]).ratio<1                flower.(['fl',num2str(ii)]).ratio=flower.(['fl',num2str(ii)]).ratio+0.05;            end            resetL(flower.(['fl',num2str(ii)]));        end    endset(gcf,'WindowButtonMotionFcn',@whilemovefcn)      % 鼠标移动调用的函数    function whilemovefcn(~,~)        % 检测鼠标位置        xy=get(gca,'CurrentPoint');        xw=xy(1,1);yw=xy(1,2);        pos=[xw,yw];                % 鼠标附近的叶子收缩率-0.2        for ii=1:6            LF=leaf.(['l',num2str(ii)]);            if closeLeaf(LF.pos1,LF.pos2,pos)% 如果距离叶子距离足够近                if leaf.(['l',num2str(ii)]).ratio>0.2                    leaf.(['l',num2str(ii)]).ratio=leaf.(['l',num2str(ii)]).ratio-0.2;                end            end        end                % 鼠标附近的花收缩率-0.2        for ii=1:2            FL=flower.(['fl',num2str(ii)]);            if closeFlower(FL.pos,pos)% 如果距离花距离足够近                if flower.(['fl',num2str(ii)]).ratio>0.6                    flower.(['fl',num2str(ii)]).ratio=flower.(['fl',num2str(ii)]).ratio-0.2;                end            end        end    end    % 距离检测函数，叶子形状近乎于椭圆，当距离俩焦点和小于一定值认为足够近    % 若足够近返回TRUE 否则返回FALSE    function bool=closeLeaf(pos1,pos2,pos3)        pL=pos1+(pos2-pos1).*0.1;        pR=pos1+(pos2-pos1).*0.9;        lTotal=norm(pL-pos3)+norm(pR-pos3);        bool=lTotal<=norm(pos1-pos2);     end        % 距离检测函数，花形状近乎于圆，当距离圆心小于一定值认为足够近    % 若足够近返回TRUE 否则返回FALSE    function bool=closeFlower(pos1,pos2)       bool=norm(pos1-pos2)<=5;    end    % 依据收缩率重新计算并绘制叶子    function resetH(lf,X,Y)        X=X.*lf.Len;        Y=Y.*lf.h.*lf.ratio;        xl1=X.*cos(lf.alf)-Y.*sin(lf.alf)+lf.pos1(1);        yl1=X.*sin(lf.alf)+Y.*cos(lf.alf)+lf.pos1(2);        xl2=X.*cos(lf.alf)+Y.*sin(lf.alf)+lf.pos1(1);        yl2=X.*sin(lf.alf)-Y.*cos(lf.alf)+lf.pos1(2);        XL=[xl1,xl2(end:-1:1)];        YL=[yl1,yl2(end:-1:1)];        set(lf.LHdl,'XData',XL,'YData',YL);      end    % 依据收缩率重新计算并绘制花朵    function resetL(fl)        xf=fl.x.*fl.ratio+fl.pos(1);        yf=fl.y.*fl.ratio+fl.pos(2);        xxf(2:2:2*length(xf))=xf;        yyf(2:2:2*length(yf))=yf;        xxf(1:2:2*length(xf))=fl.pos(1);        yyf(1:2:2*length(yf))=fl.pos(2);        %set(fl.plHdl,'XData',xxf,'YData',yyf);        set(fl.scHdl,'XData',xf,'YData',yf);        set(fl.plHdl,'XData',xxf,'YData',yyf);     end    % 绘制花朵（圆心）    function fl=drawFlower(pos)        % 随机生成一些点作为花蕊并绘图        theta=rand([1,120]).*2.*pi;        r=rand([1,120]).*3+5;        xf=r.*cos(theta)+pos(1);        yf=r.*sin(theta)+pos(2);        xxf(2:2:2*length(xf))=xf;        yyf(2:2:2*length(yf))=yf;        xxf(1:2:2*length(xf))=pos(1);        yyf(1:2:2*length(yf))=pos(2);        plHdl=plot(ax,xxf,yyf,'Color',[0.7608 0.4863 0.7216],'LineWidth',1);        scHdl=scatter(ax,xf,yf,3,'filled','CData',[0.9569 0.9804 0.9333]);        % 存储基础信息到实类        fl.x=xf-pos(1);        fl.y=yf-pos(2);        fl.pos=pos;        fl.scHdl=scHdl;        fl.plHdl=plHdl;        fl.ratio=1;        % 计算可伸缩部分花蕊坐标，绘图，存储信息        theta2=rand([1,80]).*2.*pi;        r2=rand([1,80]).*1+3;        xf2=r2.*cos(theta2)+pos(1);        yf2=r2.*sin(theta2)+pos(2);        xxf2=[ones([1,length(xf2)]).*pos(1);xf2];        yyf2=[ones([1,length(yf2)]).*pos(2);yf2];                plot(ax,xxf2,yyf2,'Color',[0.7804 0.6078 0.5020],'LineWidth',1)    end    % 绘制树枝 （端点1，端点2）    function drawBranch(pos1,pos2)        % 依据起始及末尾两点计算一个一头宽一头窄四边形坐标数据并绘图        dir=(pos2-pos1)./norm(pos2-pos1);        len=norm(pos2-pos1);        xb=[0 1 1 0].*len;        yb=[len.*0.02,len.*0.012,-len.*0.012,-len.*0.02];               xxb=xb.*dir(1)-yb.*dir(2)+pos1(1);        yyb=xb.*dir(2)+yb.*dir(1)+pos1(2);        fill(ax,xxb,yyb,[0.8157 0.6431 0.6078],'EdgeColor',[0.6157 0.5529 0.4510],'LineWidth',1.5)    end    % 绘制叶子(起始位置，叶子方向，轮廓x数据，轮廓y数据，轮廓x方向放缩比例，轮廓y方向放缩比例)    function lf=drawLeaf(pos,alf,X,Y,l,h)        X=X.*l; % 放缩叶子长度        Y=Y.*h; % 放缩叶子宽窄        % 叶子数据旋转并把两个叶子数据并在一起        xl1=X.*cos(alf)-Y.*sin(alf)+pos(1);        yl1=X.*sin(alf)+Y.*cos(alf)+pos(2);        xl2=X.*cos(alf)+Y.*sin(alf)+pos(1);        yl2=X.*sin(alf)-Y.*cos(alf)+pos(2);        XL=[xl1,xl2(end:-1:1)];        YL=[yl1,yl2(end:-1:1)];        % 绘图        lf.LHdl=fill(XL,YL,[0.4980 0.7216 0.3176]);        % 基础数据存到实类里        lf.pos1=pos;        lf.pos2=[pos(1)+l*51*cos(alf),pos(2)+l*51*sin(alf)];        lf.alf=alf;        lf.Len=l;        lf.h=h;        lf.ratio=1;             % 绘制一下叶子中线        plot(ax,[pos(1),pos(1)+l*51*cos(alf)],[pos(2),pos(2)+l*51*sin(alf)],'Color',[0.6627 0.6980 0.4431],'LineWidth',3);    endend

13.随机雪景

function snowCover% @author:slandarerMainFig=figure('units','pixels','position',[300 80 500 500],...    'Numbertitle','off','menubar','none','resize','off',...    'name','snow covered landscape');axes('parent',MainFig,'position',[0 0 1 1],...    'XLim', [0 500],...    'YLim', [0 500],...    'NextPlot','add',...    'layer','bottom',...    'Visible','on',...    'Color',[0 59 129]./255,...    'XTick',[], ...    'YTick',[]);hold on%画雪地====================================================================layerBEPos=[150;140;100;90];layerColor=[146 210 245;101 183 231;0 101 181;0 59 129];excursion=15;interval=10;xSep=25;layerPos=zeros(size(layerBEPos,1),length(xSep:xSep:500));layerPos(:,1)=layerBEPos(:,1);for i=1:size(layerBEPos,1)    for j=xSep:xSep:500        listPos=round(j./xSep+1);        tempRandi=randi([-excursion,excursion]);        yPos=tempRandi+layerPos(i,listPos-1);        if i>1&&yPos>=layerPos(i-1,listPos)-5            yPos=layerPos(i-1,listPos)-interval;        end        yPos(yPos<0)=0;        layerPos(i,listPos)=yPos;    end   endfor i=1:size(layerBEPos,1)    XData=0:xSep:500;    YData=layerPos(i,:);    Yq=interp1(XData,YData,0:1:500,'spline');    Xq=[0,0:1:500,500];    Yq=[0 Yq 0];    fill(Xq,Yq,layerColor(i,:)./255,'EdgeColor','none')end%画星星====================================================================XRandiS=randi([50 450],[1,15]);YRandiS=randi([300 460],[1,15]);scatter(XRandiS,YRandiS,10,'o','filled','CData',[252 241 0]./255)XRandiB=randi([50 450],[1,15]);YRandiB=randi([300 460],[1,15]);scatter(XRandiB,YRandiB,18,'o','filled','CData',[252 241 0]./255)%画雪花====================================================================snowXpos=[randi([0,30],[1,6]),randi([470,500],[1,6]),randi([0,500],[1,12])];snowYpos=[randi([220,470],[1,6]),randi([220,470],[1,6]),randi([470,500],[1,12])];snowSize=randi([25,50],[1,24]);snowAngle=2*pi*rand([1,24]);snowWidth=1+0.6*rand([1,24]);for i=1:24    drawSnow(snowXpos(i),snowYpos(i),snowSize(i),snowAngle(i),snowWidth(i))end%画月亮====================================================================moonPos=[320 300]+[randi([0 50]),randi([0 80])];moonSize=randi([28 32]);blankPos=randi([floor(0.3*moonSize) ceil(0.5*moonSize)],[1,2]);drawMoon(moonPos(1),moonPos(2),moonSize,moonPos(1)-blankPos(1),moonPos(2)+blankPos(2))%相关函数==================================================================    function drawMoon(x,y,R,bx,by)        t=0:pi/50:2*pi;        X=x+cos(t).*R;        Y=y+sin(t).*R;        BX=bx+cos(t).*R;        BY=by+sin(t).*R;        fill(X,Y,[255 251 219]./255,'EdgeColor','none')        fill(BX,BY,[0 59 129]./255,'EdgeColor','none')    end    function drawSnow(x,y,len,angle,width)        for theta=0:pi/3:2*pi-pi/3            xTail=cos(theta+angle)*len+x;            yTail=sin(theta+angle)*len+y;            plot([x,xTail],[y,yTail],'color',[0 134 207]./255,'lineWidth',width)            for branchRatio=[0.4 0.55 0.7]                BX=x+cos(theta+angle)*len*branchRatio;                BY=y+sin(theta+angle)*len*branchRatio;                LX=BX+cos(theta+angle+pi/3).*len.*0.4;                LY=BY+sin(theta+angle+pi/3).*len.*0.4;                RX=BX+cos(theta+angle-pi/3).*len.*0.4;                RY=BY+sin(theta+angle-pi/3).*len.*0.4;                plot([BX,LX],[BY,LY],'color',[0 134 207]./255,'lineWidth',width.*0.8)                plot([BX,RX],[BY,RY],'color',[0 134 207]./255,'lineWidth',width.*0.8)            end        end    endend

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