Drawing a rectangle with special specifications

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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

Answers (1)

Henric Rydén
Henric Rydén on 16 May 2014
Edited: Henric Rydén on 16 May 2014
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])
  3 Comments
Star Strider
Star Strider on 16 May 2014
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 on 19 May 2014
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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