It is possible to make line graph more smooth? If my data have not much points on graph?
You can try to smooth the data first, with a Savitzky Golay filter for example, and then send it to the GraphView.
A sample of this filter can be found here: Savitzky-Golay Filter
Related
I am trying to work out the best way to determine if a line goes through a polygon, where it is possible that that points on that line do no fall within the polygon as shown in image below.
My data is multiple polygons and I wish to see if a line (lat,long to lat,long) goes through 1 or more of the polygons.
leaflet has a leaflet-pip that does a point in a polygon but I need to test a line... turf.js has lineIntersect but would this work with a line and a polygon (JSON)? Is there something else I can use but haven't found yet?
Just after some advice on the best way or library to achieve this
Thank you.
turf booleanIntersects works nicely.
Example here: https://codesandbox.io/s/ripkk?file=/src/index.js:9634-9641
I am trying to work out the best way to determine if a line goes through a polygon, where it is possible that that points on that line do no fall within the polygon as shown in image below.
My data is multiple polygons and I wish to see if a line (lat,long to lat,long) goes through 1 or more of the polygons.
leaflet has a leaflet-pip that does a point in a polygon but I need to test a line... turf.js has lineIntersect but would this work with a line and a polygon (JSON)? Is there something else I can use but haven't found yet?
Just after some advice on the best way or library to achieve this
Thank you.
turf booleanIntersects works nicely.
Example here: https://codesandbox.io/s/ripkk?file=/src/index.js:9634-9641
I'm trying generate custom procedural landscape in unreal engine 4
To implement this I'm using this class https://docs.unrealengine.com/en-US/API/Plugins/ProceduralMeshComponent/UProceduralMeshComponent/index.html
and for nice noise generation on Z axis I'm using this plugin https://github.com/devdad/SimplexNoise from this library the only method I use is: USimplexNoiseBPLibrary::SimplexNoise2D
How to implement whole process I inspired from this video: https://www.youtube.com/watch?v=IKB1hWWedMk
I will try to describe flow of whole process:
define vertices count in row and column
iterate through row and column and create vertex vectors on (xscale, yscale, FMath::Lerp((-maxFallOff, maxHeight, USimplexNoiseBPLibrary::SimplexNoise2D(xperlinScale,yperlinScale)))
generate triangles using this method: https://docs.unrealengine.com/en-US/API/Plugins/ProceduralMeshComponent/UKismetProceduralMeshLibrary/ConvertQuadToTri-/index.html
generate UVs
That is all, at this point I can say everything works fine, but there is little issue, when I move camera in editor or in game on mesh appears extra edges. I also recorded video to show what I'm talking about.
https://youtube.com/watch?v=_B9Fxg5oZcE the edges I'm talking, appears on 00:05 second
Code is written in C++, I could post code here, but I think code is not problem here, I think something happens on runtime while I move camera something that I don't know...
I can say in advance if you interested that I'm not manipulating on mesh on Tick event
Problem solved...
Actually seems like I had bug in my code, I was passing too many triangle points to CreateMeshSection_LinearColor method that was the problem.
Anyway thanks for attention
Cheers
After some simulations with fenics, I saved the results in vtk format, so that I can load it in ParaView. The results are 1D-data, that are time-dependent. In the end, it should look like these example figures, I found in some papers:
This means one axis for space coordinates, one for the time and one for the actual data. ParaView shows me my data and with "warp by scalar" I get the desired result, however only for exactly one time step. Animating works too, but I do not want to create a video for 1D-data, when it looks much nicer in one 3D plot.
How can I add the time as additional axis in ParaView?
This, I am afraid, is not supported currently. It's certainly a nice feature, however. I'd suggest making a feature request on the ParaView Bug Tracker
Is there a way to create a heat map in google earth, so areas with higher values (of some specified parameter, such as population) appear as hotspots?
This seems possible.
For instance, take a look at those few links :
Disclaimer : I've tried none of those
HeatMapAPI.com
And an example
But I'm not sure how you'd do it ; seems related to .NET and a dll in some way... so might not be as nice as it seems...
Density Mapping in Google Maps with HeatMapAPI
Heat Maps for Google Maps - (a.k.a GeoIQ mashup)
Using Google Maps to Produce Heat Maps
You've got a couple of links in those articles too ; some might be interesting too.
My colleague developed an open source java program that will generate 3D heat maps (KML) files for Google Earth from simply formatted XML data files. It may be of use. The entire project code is up at https://github.com/Noblis/OSAT You can ignore the bulk of what's there, and focus on GUIMain and the supporting files. There's sample files and documentation. I'd call it about a 0.5 version - it works, we used it in our studies, but there's some rough edges. It was done for transportation accessibility studies, but you can change the parameters you're graphing to anything you want, run from command line, whatever.
You can use the vertical axis to either view the same parameter as is used for the color OR use it to map an entirely different variable.
Here's two screen shots so you can see what it does:
tool interface:
example 3D output:
You can create polygons in a KML file and set the color of them. You can also make the polygons 3D, with height perhaps representing temperature.
There is also http://www.openheatmap.com, which offers free heatmaps on top of OpenStreetMap from a CSV upload.
Try free API heat maps. A really interesting implementation : http://en.tixik.com/tools/heatmaps
HeatmapTool.com can take a CSV file of coordinates and intensity values to generate heat map tiles for Google Maps.