使用 Matlab 绘制 3D RGB 立方体模型

我编写了这段代码来绘制 RGB 立方体，但它的颜色并不完全准确？

%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);

它是需要更新的颜色图，以使您的绘图看起来像中的颜色图你的链接 http://lodev.org/cgtutor/images/colorcube.jpg。您不能简单地使用内置函数来直接生成正确的序列。另外，调用hsv(8)产生您不需要的其他颜色（在命令行窗口中打印出来查看），但不包括纯白色或黑色。您可以使用hsv(6)并附加[0 0 0] and [1 1 1]，但您需要确保顺序与代码的其余部分一致（fm and vm).

这是您的代码的修订版本 –cm矩阵对每个顶点的颜色图案进行编码：

% 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];

% RGB colors for each vertex
cm = [0 0 0;
      0 1 0;
      1 1 0;
      1 0 0;
      0 0 1;
      0 1 1;
      1 1 1;
      1 0 1];

% Plot the cube - gives each face a different color and creates the cube at a convenient viewing angle
figure('Color','w')
patch('Vertices',vm,'Faces',fm,'FaceVertexCData',cm,'FaceColor','interp');
view(120,30);

% Plot axes
axis equal;
axis off;
d1 = 1.25;
line([0 0 0;d1 0 0],[0 0 0;0 d1 0],[0 0 0;0 0 d1],'Color','k','LineWidth',2);

% Label axes
d2 = 0.1;
text([0 1 0],[1 -d2 -d2],[-d2 0 1],'255','FontSize',11,'HorizontalAlignment','center');
text([0 d1 0],[d1 d2 d2],[d2 0 d1],{'R','G','B'},'FontSize',16);

这会产生一个看起来像这样的数字