用Matlab绘制3-D RGB立方体模型

Question

我写了这段代码来绘制RGB立方体，但是它的颜色不完全正确吗？

%Define a six row by four column matrix to define the six cube faces
fm = [1 2 6 5; 2 3 7 6; 3 4 8 7; 4 1 5 8; 1 2 3 4; 5 6 7 8]

%Define an eight row by three column matrix to define the vertices at which
%the faces meet
vm = [0 0 0; 1 0 0; 1 1 0; 0 1 0; 0 0 1; 1 0 1; 1 1 1; 0 1 1]

%Plot the cube ----- gives each face a different color and creates the cube at a convenient viewing angle
patch('Vertices',vm,'Faces',fm,'FaceVertexCData',hsv(8),'FaceColor','interp');
view(3);

Answer 1

当我完成代码时，@horchler 的答案已经在线了。看起来很完美。无论如何也发布我的。

为了了解您所应用的颜色，我打印了 hsv(8) 的值，如下所示。

1.0000         0         0
1.0000    0.7500         0
0.5000    1.0000         0
     0    1.0000    0.2500
     0    1.0000    1.0000
     0    0.2500    1.0000
0.5000         0    1.0000
1.0000         0    0.7500

但实际上你要应用的是红、绿、蓝、白、青、品红、黄、黑。请参考此链接了解Matlab颜色代码。因此，我们可以根据您的要求手动将颜色应用于每个顶点。我更改了你的代码如下。

% Define a six row by four column matrix to define the six cube faces
fm = [1 2 6 5; 2 3 7 6; 3 4 8 7; 4 1 5 8; 1 2 3 4; 5 6 7 8];

% Define an eight row by three column matrix to define the vertices at which
% the faces meet
vm = [0 0 0; 1 0 0; 1 1 0; 0 1 0; 0 0 1; 1 0 1; 1 1 1; 0 1 1];

% Plot the cube ----- gives each face a different color and creates the 
% cube at a convenient viewing angle
clear cdata;
cdata = [
    0 0 0; % black
    1 0 0; % red
    1 0 1; % magenta
    0 0 1; % blue
    0 1 0; % green
    1 1 0; % yellow
    1 1 1; % white
    0 1 1; % cyan
    ];

patch('Vertices',vm,'Faces',fm,'FaceVertexCData',cdata,'FaceColor','interp');

axis equal;
axis off;
view(3);

输出：