基于Matlab模拟圣诞树.zip

close all;clear;clc % setup snow=450; % number of snow flakes [0 .. 5000] % draw tree h=0:0.2:25; %vertical grid [X,Y,Z] = cylinder(tree(h)); %produce a tree formed cylinder Z=Z*25; %scale to the right heigth %Add some diffusion to the surface of the tree to make it look more real treeDiffusion=rand(126,21)-0.5;%some horizontal diffusion data %add diffusion to the grid points for cnt1=1:21 for cnt2=16:126%starting above the trunk %get the angle to always diffuse in direction of the radius angle=atan(Y(cnt2,cnt1)/X(cnt2,cnt1)); %split the diffusion in the two coordinates, depending on the angle X(cnt2,cnt1)=X(cnt2,cnt1)+cos(angle)*treeDiffusion(cnt2,cnt1); Y(cnt2,cnt1)=Y(cnt2,cnt1)+sin(angle)*treeDiffusion(cnt2,cnt1); %some Vertical diffusion for each point Z(cnt2,cnt1)=Z(cnt2,cnt1)+(rand-0.5)*0.5; end end %draw the tree h0 = figure('Units','inches'); pos = h0.Position; pos(1) = 1; pos(2) = 1; pos(3) = 7; pos(4) = 7; h0.Position = pos; surfl(X,Y,Z,'light') %% View and format %Use as nice green color map (darker at the bottom, lighter at the top) r=(0.0430:(0.2061/50):0.2491)';%red component g=(0.2969:(0.4012/50):0.6981)';%green component b=(0.0625:(0.2696/50):0.3321)';%blue component map=[r,g,b];%join in a map for cnt=1:6 %change the lower part to brown for the trunk map(cnt,:)=[77,63,5]/265; end colormap(map)%set the map view([-37.5,4])%Change the view to see a little more of the Actual 3D tree lighting phong %some nice lighting shading interp %remove grid and smoothen the surface color axis equal %takes care of display in the right proportion axis([-10 10 -10 10 0 30]) %give some more axis space (for the snow later) axis off %but don't show axis hold on %to draw the rest title('Merry Christmas To 罗雨欣','color','w',... 'fontsize',25,... 'fontweight','Bold')%self explaining set(gcf,'color',[22 32 51]./255) % Presents %Draw some presents around the tree (each with random color) drawPresent(2,-4,0,3,3,2); drawPresent(-4,3,0,2,3,1.5); drawPresent(5,3,0,4,3,3); drawPresent(-14,-5,0,6,3,1); drawPresent(-9,-10,0,2,2,2); drawPresent(0,4,0,4,3,3); drawPresent(-6,-13,0,3,3,3); %% Snow %create some random 3D coordinates for the snow (amount as in setup above) snowX=(rand(snow-100,1)*25-12.5); snowY=(rand(snow-100,1)*25-12.5); snowZ=(rand(snow-100,1)*27); color0 = jet(length(snowX)); %Note:Some flakes will end up IN the tree but just can't be seen then for ii = 1:length(snowX) plot3(snowX(ii),snowY(ii),snowZ(ii),'*','color',color0(ii, :),'markersize',randi(15))%plot coordinates as white snow flakes % plot3(snowX(ii),snowY(ii),snowZ(ii),'*','color',color0(ii, :))%plot coordinates as white snow flakes end h=plot3(snowX,snowY,snowZ,'w*'); im = {}; for ii = 1:180 if mod(ii,3) == 0 h.Visible = 'off'; snowX=(rand(snow,1)*25-12.5); snowY=(rand(snow,1)*25-12.5); snowZ=(rand(snow,1)*27); h=plot3(snowX,snowY,snowZ,'w*'); % pause(0.25) else view([ii,4]) % pause(0.1) end if ii > 85 frame = getframe(gcf); im{ii} = frame2im(frame); end end hold off%Done im(cellfun(@isempty,im))=[]; % end % of function file2write = 'chris.gif'; for ii = 1:length(im) [A, map] = rgb2ind( im{ii}, 256); if ii == 1 imwrite(A, map, file2write, 'gif','LoopCount',Inf,'DelayTime', 0.12); else imwrite(A, map, file2write, 'gif','WriteMode','append','DelayTime', 0.12); end end