# grid on a circle

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 April 14, 2010, 17:55 grid on a circle #1 Senior Member   Hassan Join Date: Apr 2009 Posts: 106 Rep Power: 8 hey may be my question will confuse evrybody but i wil try to put the issue in words.. i need to make a grid around the circle... there are different grids like O, C or H type. the generation of O grids is easy but what i want is that on the boundaries the grid boxes should be square (means the intersecting lines should be at 90 degrees)... for this requirement i cant use O grid and neither C or H... C grid will have the same problem as O grid on the top and lower boundaries and H grid cant be applied as it is circle and surafce is curved.. I am thinking to make mesh in two steps.. around the circle O grid and then all around try to make a border of rectangle in which the grids would be at right angles.. any other suggestions...

April 14, 2010, 22:24
#2
Senior Member

p ding
Join Date: Mar 2009
Posts: 284
Rep Power: 9
Dear freinds:
Do you mean the cartesian grid system.
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 April 15, 2010, 03:10 #3 Senior Member   Hassan Join Date: Apr 2009 Posts: 106 Rep Power: 8 yes exactly.. this is the kind of grid i want ?? any ideas how to make it in fortran.. would like to know the procedure to do it.. thanks

 April 15, 2010, 06:26 #4 Senior Member     p ding Join Date: Mar 2009 Posts: 284 Rep Power: 9 dear friends. this kind of grid can be generated base on the quadra tree data structure in fortran. i have study this problem for 2 years. according to my experience, there are no free code in the web. tried to find some paper for reference.

 April 15, 2010, 11:56 #5 Senior Member   Hassan Join Date: Apr 2009 Posts: 106 Rep Power: 8 thanks for info; any paid codes on web in fortran for this problem?? regards

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