# Isovist Challenge

**URL:** <https://forum.dynamobim.com/t/isovist-challenge/11510>\
**Category:** Lists-Logic\
**Created:** [May 3, 2017, 2:18pm UTC](https://forum.dynamobim.com/t/isovist-challenge/11510 "2017-05-03T14:18:02Z")\
**Posts on this page:** 1\
**Showing post:** 24

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**Author:** ![JJUlkins](https://avatars.discourse-cdn.com/v4/letter/j/a183cd/32.png) [@JJUlkins](https://forum.dynamobim.com/u/JJUlkins)\
**Post date:** [March 25, 2019, 6:43pm UTC](https://forum.dynamobim.com/t/isovist-challenge/11510/24 "2019-03-25T18:43:36Z")

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Hi everyone,  
I think I messed something up in the lists but couldn’t find it. I marked the centerpoints as 1&2 but as you see, they cover an undesired area rather than creating from inwards.

This is the wrong result:

 ![crcle](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/7/c/7c58f1a702380dd20f2e6f0125daa5687a4e51be.png)

And this is part of the graph:

 ![FirstPart](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/7/0/706656e6b7709b2d517681e2c1f7b5c80dd2de6c.jpeg) ![SecondPart](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/7/3/73d89a7d4aa77530278c3b78fa30463c895bac9d.jpeg)

What do you think that might have had created the problem? I tried to replicate the graph presented above.

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