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Problem with intervisibility

Question asked by karunrdayal on Nov 13, 2016

The intervisibility is not working properly as shown in the figure. The selected lines are the sight lines which get a visible value of 1 after carrying out intervisibility. Why are the lines joining two points (circled in black and red) not calculated to be visible. 

 

Also, if a sight line to the top of the building has visible=1, the bottom point has visible=0, and vice versa.

 

Thank you

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