Im currentyle using polylines to track the movement of something on a leaflet map.
Just for this example think about this.
I have an object with {lat, long} and when it updates it gets new atributes called {newLat, newLong}
Im drawing a polyline between this 2 points, but i want that polyline to always be the same length (lets say 100 meters).
So in that picture, the point moved from top to bottom and what im trying to achive its to keep the direction of the polyline to always be this length lets say
Any ideas on how to achieve this?
Related
I am currently trying to draw a circle of a certain radius at the origin of my chart.
One of the ways I found to do that is to use the Circle component of React Native Svg (I don't know why, I wasn't able to use the one provided by Victory) but then its size and location are set in pixels. I also found that I could use a VictoryScatter and add a single data point at (0, 0), but then it's the same problem again. I also thought of computing the points of the circle with a specified resolution and then use a VictoryLine, but this component only goes from left to right.
Is there a way to draw a circle of a certain size in a chart ? Preferably only the border, but if it's filled it's okay too.
If that's not possible, is there an other library I could use to achieve this ?
I've been trying to get coordinates from Minecraft and putting them on an WPF canvas for a map viewer. However, most of it does not work and it is not centered. How would you go about with doing this?
Help is appreciated!
Update #1:
I'll be a bit more descriptive of what I want. I'd like to show positions (not images or terrain and stuff) on a WPF Canvas. What I am trying to do is making a navigation system showing lines from certain coordinates to other coordinates. One thing I've tried was making the canvas as big as a Minecraft map, but that didn't work well. https://www.codeproject.com/Articles/85603/A-WPF-custom-control-for-zooming-and-panning I've been using that with no problems, but the thing is that I want to actually translate in game coordinates to coordinates on the maps for waypoints and such.
Sorry for the lack of detail at first!
I came across this scene (scene ID # 71c8eef9-b44e-447f-a0d2-fd299318da56) on one of the examples on stackoverflow. When I use that scene id as in the code below in a-frame.
io3d.scene.getAframeElements('71c8eef9-b44e-447f-a0d2-fd299318da56').then(elems => { document.querySelector('a-scene').appendChild(elems[0]) })
I can see the scene with perfect position and scale. However, when I use the scene I developed (scene id: 8f769bc6-4a0e-4bb4-bfaa-8580ac93f88f) using the same code in a-frame, the house displays as a very small object and position is also not correct. There is no difference in the code for both the scenes but the scale and position differs for both of them.
I tried to play around with position and scale attributes but it did not work. Could you kindly help understand what could be the difference? Thanks, Niraj
Your model is positioned very far from the origin of the worl, that means it is (110.86, 88.96) meters away from the center.
when you use io3d.scene.getAframeElements it will take the position and scale from the original scene.
you have the following options:
1) change your camera position to match the offset of the model
2) move the model to the center by changing positions of the elements
3) use the appcreator to create your aframe scene with the correct setup (here is an example of your scene
4) adjust the scene in spaces.archilogic.com
Hope that helps!
I´m working with Leaflet.js and I have a lot of markers but I want to get a polygon drawn automatically containing a specific group of markers.
There´s an image:
Every marker has a specific radio, so if a use it, would be like this:
but I don't want that, I want an area that contains markers, I don't know how can I do that.
You might want to create a convex hull.
https://gis.stackexchange.com/questions/215137/how-to-create-a-convex-hull-with-leaflet-points:
"The easiest way to do this with javascript is to use Turf.js's convex functionality."
A working sample - http://bl.ocks.org/ebrelsford/c31f61d39d2cd559e18a
I need to display many markers on a WPF image. The markers can be lines, circles, squares, etc. and there can be several hundreds of them.
Both the image source and the markers data are updated every few seconds. The markers are associated with specific pixels on the image and their size should be absolute in relation to the screen (i.e. when I move the image the markers should move along with it, but if i zoom in, they should take the same space of the screen as before).
Currently, I've implemented this using the AdornerLayer. This solution has several problems but the most significant one is that the UI doesn't fare well under the load even for 120 such markers.
I wanted to ask what would be the best way to go about implementing this? I thought of two solutions:
Inherit from Canvas and make sure it is invalidated not for every
added marker but for a range of markers at once
Create a control that holds an image and change its OnDraw to draw all the markers
I would appreciate some pointers from someone with experience with a similar problem.
Your use case looks quite specialized, so a specialized solution seems in order. I'd try a variant of your second option — extend Image, overriding its OnRender method.