Scatter3 and surf yields a bug?
1 回表示 (過去 30 日間)
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The following code yields a bug:
close all
colors = colormap('summer');
color = colors(end,:);
surf([0 0; 1 1],[0 1; 0 1],[1 1; 1 1],'faceColor',color);
hold on
surf([0 0; 1 1],[0 1; 0 1],[0 0; 0 0],'faceColor',color);
surf([0 1; 0 1],[1 1; 1 1],[0 0; 1 1],'faceColor',color);
surf([0 1; 0 1],[0 0; 0 0],[0 0; 1 1],'faceColor',color);
surf([1 1; 1 1],[0 0; 1 1],[0 1; 0 1],'faceColor',color);
surf([0 0; 0 0],[0 0; 1 1],[0 1; 0 1],'faceColor',color);
lineArr = 0:0.1:1;
daspect([1 1 1]);
view(3)
camlight;
lighting phong;
set(gca, 'Color', 'none');
camlight('left')
axis equal
scatter3(-0.1*ones(1,length(lineArr)),lineArr,lineArr,'fill','MarkerFaceColor', 'red')
xlabel('xaxis')
Namely that some areas around the red markers turns into green. Can this be fixed?
2 件のコメント
Matz Johansson Bergström
2014 年 8 月 21 日
I don't see anything wrong with this render. Where are these "green areas" exactly? If you mean the yellow/green sides, this is due to the camera light.
回答 (5 件)
Youssef Khmou
2014 年 8 月 21 日
To get uniform color, delete the light commands :
colors = colormap('summer');
color = colors(end,:);
surf([0 0; 1 1],[0 1; 0 1],[1 1; 1 1],'faceColor',color);
hold on
surf([0 0; 1 1],[0 1; 0 1],[0 0; 0 0],'faceColor',color);
surf([0 1; 0 1],[1 1; 1 1],[0 0; 1 1],'faceColor',color);
surf([0 1; 0 1],[0 0; 0 0],[0 0; 1 1],'faceColor',color);
surf([1 1; 1 1],[0 0; 1 1],[0 1; 0 1],'faceColor',color);
surf([0 0; 0 0],[0 0; 1 1],[0 1; 0 1],'faceColor',color);
lineArr = 0:0.1:1;
daspect([.5 .5 .5]);
view(3)
%camlight;
lighting phong;
set(gca, 'Color', 'none');
%camlight('right')
axis equal
scatter3(-0.1*ones(1,length(lineArr)),lineArr,lineArr,'fill','MarkerFaceColor', 'red')
xlabel('xaxis')
0 件のコメント
José-Luis
2014 年 8 月 21 日
Making the patches transparent will show the points that are missing from your plot:
colors = colormap('summer');
color = colors(end,:);
surf([0 0; 1 1],[0 1; 0 1],[1 1; 1 1],'faceColor',color,'facealpha',0.5);
hold on
surf([0 0; 1 1],[0 1; 0 1],[0 0; 0 0],'faceColor',color,'facealpha',0.5);
surf([0 1; 0 1],[1 1; 1 1],[0 0; 1 1],'faceColor',color,'facealpha',0.5);
surf([0 1; 0 1],[0 0; 0 0],[0 0; 1 1],'faceColor',color,'facealpha',0.5);
surf([1 1; 1 1],[0 0; 1 1],[0 1; 0 1],'faceColor',color,'facealpha',0.5);
surf([0 0; 0 0],[0 0; 1 1],[0 1; 0 1],'faceColor',color,'facealpha',0.5);
lineArr = 0:0.1:1;
daspect([1 1 1]);
view(3)
camlight;
lighting phong;
set(gca, 'Color', 'none');
camlight('left')
axis equal
scatter3(-0.1*ones(1,length(lineArr)),lineArr,lineArr,'fill','MarkerFaceColor', 'red')
xlabel('xaxis')
0 件のコメント
Matz Johansson Bergström
2014 年 8 月 21 日
編集済み: Matz Johansson Bergström
2014 年 8 月 21 日
The reason the points disappear when you move the eye's position is because of axis clipping planes used by Matlab. When the points are outside of these clipping planes, they are cut out of the view. Try by moving the camera, you will see what I mean.
You can modify the axis by calling axis([xmin, xmax, ymin, ymax, zmin, zmax]) so you can set it for yourself or simply remove axis equal. See http://www.mathworks.se/help/matlab/ref/axis.html for more information.
1 件のコメント
Matz Johansson Bergström
2014 年 8 月 22 日
編集済み: Matz Johansson Bergström
2014 年 8 月 22 日
The "green areas" is another issue connected with the camera light. Because you have the lighting turned on, the planes or parts of a more complex 3d object facing away from the light will be shaded (using Phong in this example). You can change the light source position
light('Position', [-1 0 0], 'Style', 'infinite');
Now the nearest cube plane will be brighter than the others, which is maybe what you want.
Jon Vegard
2014 年 8 月 22 日
2 件のコメント
Star Strider
2014 年 8 月 22 日
@Jon — You may also need to set the 'MarkerEdgeColor' to 'r' in the scatter3 call, if I understand your Answer here correctly.
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