Drawing geometric shapes and images at given coordinates

[coyfi]

Greetings,

I was wondering what would be the most straightforward way to draw geometric shapes on the C++ front-end map at certain coordinates? Would using geodata be the correct way to achieve it?

A simple use case would be to read coordinates and shape identifiers from a file and draw them on the map. A secondary use case would be to draw a given vector or raster image file at the given coordinates, with a title - I believe these are both covered in the tutorials for the Javascript version of VTS Browser, but couldn't quite figure out the C++ equivalent.

Thank you.

[malytomas]

Hi Coyfi, support for geodata is actively being worked on for the c++ browser now.

Current status:

• lines
  • [x] flat or not
  • [x] width: pixels, ratio, meters
  • [x] color
  • [ ] style
• line labels
  • [x] lod-based-size or pixel size
  • [x] source
  • [x] font
  • [x] color
  • [x] outline
  • [x] no-overlap
  • [ ] line-label-offset
• points
  • [x] flat or not
  • [x] radius: pixels, ratio, meters
  • [x] color
  • [ ] style
• icons
  • [x] source
  • [x] scale
  • [x] offset
  • [x] origin
  • [x] stick
• labels
  • [x] source
  • [x] fonts
  • [x] size (pixels)
  • [x] color(2)
  • [x] outline
  • [x] origin
  • [x] align
  • [x] offset
  • [ ] width
  • [x] stick
  • [x] no-overlap
• polygons
  • [x] triangle surfaces
• [x] z-index
• [x] zbuffer-offset
• [ ] events, selection and hits
  • support is not planned
• [x] visibility(-abs | -rel)
• [x] culling
• [x] next-pass
• [x] some undocumented features that are being added to both js and c++ browsers

legend:

• [x] done
• [ ] not yet implemented

We strive to make the geodata implementation as compatible as possible, but there will inevitably be differences.

The vts-browser-desktop example app has some capabilities to show / modify geodata and stylesheets.

~To answer your question, adding some points with labels is already possible, but adding images (icons) not yet.~

Hope this helps.

Cheers, Tomáš Malý

-- EDIT(2019-05-20): devel merged into master, marked few more things as done -- EDIT(2019-06-26): icons -- EDIT(2019-12-05): line labels

[coyfi]

Thank you for the detailed reply! It is helpful to know what is currently possible to do with the project and what will be in the future - glad that the C++ version is actively developed as well.

It seems we'll be looking at using the Javascript version until the C++ one becomes more mature feature-wise, thus at least for my part this issue could be marked as resolved/closed if preferred.

[malytomas]

Hi, I just wanted to let you know that the things you asked for are now implemented in the c++ browser too.

You may want to give it a try and, please, let us know if you find any problems.

Best, tm

[coyfi]

Thank you for the follow-up, it is good to hear the C++ version is actively developed - will definitely have to try it again the next possible moment.