exp3.zip_计算机图形学_透视变换_透视投影

% 实验三：图形变换

% 时间：2018-4-11

% 作者：黄娟娟 201501030508

close all; clear; clc;

1.plot3()

[x,y] = meshgrid(-2:0.1:2);

z = x.*exp(-x.^2-y.^2);

figure; plot3(x,y,z);title('plot3 线图');

2.surf()

figure; mesh(x,y,z);title('mesh 网格图');

4.patch()

顶点

vert = [1 1 1;1 2 1;2 2 1;2 1 1;1 1 2;1 2 2;2 2 2;2 1 2];

% 面由顶点序号组成

fac = [1 2 3 4;2 6 7 3;4 3 7 8;1 5 8 4;1 2 6 5;5 6 7 8];

subplot(131);

% 立方体由顶点和面定义

patch('Faces',fac,'Vertices',vert,'Facecolor','w');

view(3);subplot(132);patch('Faces',fac,'Vertices',vert,'faceVertexCData',hsv(6),'Facecolor','flat');

surf(x,y,z);

T = [1 0.2 0; 1.2 1 0; 0 0 1];

for i = 1:6

for j = 1:6

a = x(i,j); b = y(i,j); c = z(i,j); m = [a,b,c]*T';

x1(i,j) = m(1); y1(i,j) = m(2); z1(i,j) = m(3);

end

end

figure; surf(x1,y1,z1);

4.3.柱体旋转

hold on;

R = [cos(i) sin(i) 0;-sin(i) cos(i) 0;0 0 1];

for j = 1:21