GPX Data

Programming Questions

jorsnore

in Programming Questions • 2 years ago

Hey, so I'm new to Processing (of course) and I'm having trouble using GPX data to generate displacement maps. I've messed around with sic139's code for " Advanced 3D Displacement Maps" and am trying to find a way to control the extrusions through GPX data instead of a heightmap. I'm working with a couple people on this (one of whom is very good at PHP but new to Processing as well) and we are doing ok retrieving the GPX data, but we're having trouble putting it into a sketch.

The goal is ultimately:

-import GPX file to Processing

-use an image as a mask so that only part of the grid extrudes (it'll be in the shape of Washington, D.C.)

-map extrusions on the plane based on GPX data

I've also looked at the GPX/Processing wiki but for some reason my code wasn't working even after I installed the gpx library.

Any pointers here would be greatly appreciated, I know (or at least I think I know) that it's involved.

Replies(2)

PhiLho

Re: GPX Data

2 years ago

I wrote a little GPX sketch some time ago, to help somebody. It was about drawing a trek itinerary, ignoring elevation information. I didn't know you can use it to describe a surface. Checked with Wikipedia, they talk only about waypoints, tracks and routes. Not sure how you want to transform that to a heightmap.

jorsnore

Re: Re: GPX Data

2 years ago

We were thinking that we could plot several tracks on one plane, with each track at something like 60% opacity (for example) and then when they were overlaid we would get an image of all the routes with darker spots where there was more data. We could then turn that into a grayscale image (and likely invert the colours I think, to make sure it extrudes the right parts) and plug that image (hopefully automatically) into the displacement map code.

Ideally we would be able to plot individual points based on elevation and use those for the extrusions, but so far we haven't had much luck.

Top Reply

GPX Data

Replies(2)

Re: GPX Data

Re: Re: GPX Data

Statistics

Tags

Actions

Related Posts