threed_图像处理_

x=0:0.1:3*pi; z1=sin(x); z2=sin(2.*x); z3=sin(3.*x); y1=zeros(size(x)); y3=ones(size(x)); y2=y3./2; plot3(x,y1,z1,'r',x,y2,z2,'b',x,y3,z3,'g'); grid on; xlabel('x-axis'); ylabel('y-axis'); zlabel('z-axis'); %% t = 0:pi/50:10*pi; plot3(sin(t),cos(t),t) grid on; axis square; %% turns = 40*pi; t = linspace(0,turns,4000); x = cos(t).*(turns-t)./turns; y = sin(t).*(turns-t)./turns; z = t./turns; plot3(x,y,z); grid on; %% x = -2:1:2; y = -2:1:2; [X,Y] = meshgrid(x,y); %% x = -3.5:0.2:3.5; y = -3.5:0.2:3.5; [X,Y] = meshgrid(x,y); Z = X.*exp(-X.^2-Y.^2); subplot(1,2,1); mesh(X,Y,Z); subplot(1,2,2); surf(X,Y,Z); %% clear; x = -3.5:0.2:3.5; y = -3.5:0.2:3.5; [X,Y] = meshgrid(x,y); Z = X.*exp(-X.^2-Y.^2); subplot(2,1,1); mesh(X,Y,Z); axis square; subplot(2,1,2); contour(X,Y,Z); %% clear; x = -3.5:0.2:3.5; y = -3.5:0.2:3.5; [X,Y] = meshgrid(x,y); Z = X.*exp(-X.^2-Y.^2); subplot(1,3,1); contour(Z,[-.45:.05:.45]); axis square; subplot(1,3,2); [C,h] = contour(Z);clabel(C,h); axis square; subplot(1,3,3); contourf(Z); axis square; %% clear; x = -3.5:0.2:3.5; y = -3.5:0.2:3.5; [X,Y] = meshgrid(x,y); Z = X.*exp(-X.^2-Y.^2); [C,h] = contourf(Z,[-.45:.05:.45]); clabel(C,h);axis square; %% x = -3.5:0.2:3.5; y = -3.5:0.2:3.5; [X,Y] = meshgrid(x,y); Z = X.*exp(-X.^2-Y.^2); subplot(1,2,1); meshc(X,Y,Z);%下面多一个contour图 subplot(1,2,2); surfc(X,Y,Z); %% sphere(50); shading flat; light('Position',[1 3 2]); light('Position',[-3 -1 3]); material shiny; axis vis3d off; set(gcf,'Color',[1 1 1]); view(-45,20); %% [X, Y, Z] = sphere(64); h = surf(X, Y, Z); axis square vis3d off; reds = zeros(256, 3); reds(:, 1) = (0:256.-1)/255; colormap(reds); shading interp; lighting phong; set(h, 'AmbientStrength', 0.75, 'DiffuseStrength', 0.5); L1 = light('Position', [-1, -1, -1]); set(L1, 'Position', [-1, -1, 1]); set(L1, 'Color', 'g') %% v = [0 0 0; 1 0 0 ; 1 1 0; 0 1 0; 0.25 0.25 1; ... 0.75 0.25 1; 0.75 0.75 1; 0.25 0.75 1]; f = [1 2 3 4; 5 6 7 8; 1 2 6 5; 2 3 7 6; 3 4 8 7; 4 1 5 8]; subplot(1,2,1); patch('Vertices', v, 'Faces', f, ... 'FaceVertexCData', hsv(6), 'FaceColor', 'flat'); view(3); axis square tight; grid on; subplot(1,2,2); patch('Vertices', v, 'Faces', f, ... 'FaceVertexCData', hsv(8), 'FaceColor','interp'); view(3); axis square tight; grid on; %% load cape X=conv2(ones(9,9)/81,cumsum(cumsum(randn(100,100)),2)); surf(X,'EdgeColor','none','EdgeLighting','Phong',... 'FaceColor','interp'); colormap(map); caxis([-10,300]); grid off; axis off;