Pedestrian path gradient list management

[Matthew_Kneale]

Hi,

I’m after some advice in list management. I’ve created a Grasshopper definition that measures the gradient of an existing pedestrian path within a landscape and then assesses it against allowable gradients within Australian Standards AS 1428.1-2009 Design for access and mobility.

I’m able to get it to work perfectly for one pedestrian path. However, it gets messed up when I analyse two paths at the same time. Does anyone have any tips on how I can manage the lists from the two different pedestrian paths?

Here’s a screenshot of it working with one pedestrian path:

Here’s it glitching when I add two pedestrian paths:

Here’s a summary of the pedestrian path and ramp gradients in Australian Standards:

Here’s the Grasshopper definition:
171214_PathGradient_Assessment.gh (52.5 KB)

Thanks in advance for any tips!

Matthew

[joeallberry]

I’m running an older version of GH, so missing some components, but I think if you “Graft” the curve param it should work for you?

It’s worth having a read of the GH primers, once you have the eureka moment about data structures it opens up a lot of options.

[HS_Kim]

@joeallberry

I think if you “Graft” the curve param it should work for you?

Yes, “Graft” should do the job but it’s important not to apply “Flatten” in the middle of the downstream…

171214_PathGradient_Assessment_re.gh (43.8 KB)

[Matthew_Kneale]

Thanks for the tip @joeallberry and thanks @HS_Kim for fixing up the Grasshopper definition for me!! I also like how you simplified the definition by projecting the points onto the curve instead of the complicated way I had done it.

I’ve added a legend to the definition:

Here’s the revised file for anyone interested:
171219_PathGradient_Assessment.gh (59.8 KB)

Thanks again,
Matthew