Drawing a rectangle with special specifications

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Stephen
Stephen 2014-5-16
评论： Henric Rydén 2014-5-19
how can i draw a 172*172 that first edge is black (intensity=0) and second edge 10% brighter and the third edge 10% brighter than second and the last edge 10% brighter than third edge...
thank you for your answers

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回答（1 个）

Henric Rydén
Henric Rydén 2014-5-16
编辑：Henric Rydén 2014-5-16
figure;
axes('XLim', [-50 200],'YLim', [-50 200]);
line([0 172],[172 172],'LineWidth',5,'Color',[0 0 0])
line([172 172],[172 0],'LineWidth',5,'Color',[.1 .1 .1])
line([172 0],[0 0],'LineWidth',5,'Color',[.2 .2 .2])
line([0 0],[0 172],'LineWidth',5,'Color',[.3 .3 .3])
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Star Strider
Star Strider 2014-5-16
To compensate for line thickness, change it to:
figure;
axes('XLim', [-50 200],'YLim', [-50 200]);
line([-2 174],[172 172],'LineWidth',5,'Color',[0 0 0])
line([172 172],[174 -2],'LineWidth',5,'Color',[.1 .1 .1])
line([174 -2],[0 0],'LineWidth',5,'Color',[.2 .2 .2])
line([0 0],[-2 174],'LineWidth',5,'Color',[.3 .3 .3])
Henric Rydén
Henric Rydén 2014-5-19
If you need nicer corners you should use patch instead of line. The syntax is similar, but you give coordinates of faces and vertices. You can also set transparency of patch objects.

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