I'm using REVClusterMap in my project to get my map annotations clustered on different levels of zoom so I don't show all of them at once as there are many. The problem is that on certain levels, some of the annotations get included in a cluster that's not very close. So I'm guessing this is because of the radius in which they get clustered. Is there any way to do this? The BASE_RADIUS doesn't seem to be used anywhere.
Thanks
After some research, it seems that it doesn't work using the BASE_RADIUS after all. It splits the view in several areas and then clusters the ones that get in the respective area.
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I studied the multimarker documentation of ARToolKit for iOS and i have some troubles in achieving some sort of QR-Code.
I want, for example:
A set of 6 markers positioned differently on a picture, and when and only when ALL of them are present, some sort of video is displayed in the origin of them( i want to use some sort of CORNER Markers like QR-Code system ).
How to do this ? From what i've seen, on multimarkers, if 1 is present out of 6 for example, the object is displayed.
From looking into the ARToolKit code you can see that a MultiMarker is internally handled as one single Marker consisting of several Pattern:
https://github.com/artoolkit/artoolkit5/blob/master/lib/SRC/ARWrapper/ARMarker.cpp#L344
https://github.com/artoolkit/artoolkit5/blob/master/lib/SRC/ARWrapper/ARMarkerMulti.cpp#L75
That is why ARToolKit will always return true whenever one of the markers configured in the multi-marker configuration is visible.
Taking that into account ‘Multi-Markers’ are not the way to go for the target you would like to reach.
What you can do, however, is to configure each marker separately and add them as ‘Single-Marker’. Then you can query if all of these ‘Single-Markers’ are visible.
If so you can calculate the origin of all these ‘Single-Markers’ and render your object there.
You can get an idea on how to configure several ‘Single-Markers’ if you take a look here:
http://augmentmy.world/moving-cars-augmented-reality
Also take that example here on how to set to markers into the same coordinate system (and calculate the distance between them) you can use that as a starting point for calculating the origin between several markers:
https://github.com/artoolkit/artoolkit5/tree/master/AndroidStudioProjects/ARMarkerDistanceProj
I know that these are not iOS examples but I have only done Android so far. Also, the ARWrapper interface should be the same on Android and iOS, meaning to say there should not be much difference between these two.
I hope that helps
I have made an OpenLayers 3 web application I use while driving. It would be very handy to have the speed of the car in one corner of the map. Is it possible to achieve this so that the text (numbers) are locked to the viewport of the map rather than the map itself. I'm thinking of something similar to the controls of the map.
I suppose I could put it below the map but then I'm afraid I would run into problems with different sizes of screens.
Could somebody suggest a technique I should look into?
I have an app (iPhone) that uses MapKit and users can create things on the map (annotations in the remote database, with latitude and longitude).
Problem is that very often users put things in the same building, very close, even in the same coordinates. So you only see the most up-to-date annotation unless you tap it and another is shown, but the usability of this is horrible. No users realize they can do that.
Therefore I guess a way to group close points and when tap, show all of them. It seems the first step can be done with clusters and I see several libraries for iOS for that:
http://cocoapods.org/?q=on%3Aios%20cluster
I would like to know if you have any idea or suggestion to solve the second problem, or the whole problem.
Thanks in advance.
Depending upon the clustering library used, you may be able to get the clustered region that is represented. Then, upon cluster marker tap, you could zoom to that region.
The JS library Leaflet has this behavior so you can see what it's like:
http://leaflet.github.io/Leaflet.markercluster/example/marker-clustering-zoomtobounds.html
I realize this is a JS library not ObjC, but just linking it for demo purposes.
On gmap3 when you have multiple markers with the exact same location, no matter how deep you zoom in, you won’t get a chance to see markers. If you remove clustering on a certain zoom levels (or remove it at all), you’ll see only one marker there(the top one), others will remain hidden underneath, since they stack on top of each other.My main problem is how to show the markers of the cluster with the exact same location
That a bit late for an answer but maybe someone got the same problem recently...
The solution for this particluar issue may be solved by diverse approaches:
1) use the spiderfier https://github.com/jawj/OverlappingMarkerSpiderfier
2) add an listener to the cluster and write your own paginator. This is my favorite solution right now, especially when more than 30 items are placed on the the same location.
I'm trying to make a 2d tile map and have run into some problems with seams appearing when layering tiles over one another. Here is a screenshot:
http://i.imgur.com/3zgcQ.png
I've tried several different ways to fix this including drawing in separate spritebatch.Begin()/End() blocks. Both layers are using the exact same code to get their position so they should be drawn directly over one another correct? Am I doing something wrong? I tried searching for an answer to this to no avail :( Any help would be greatly appreciated!
Are you drawing on whole values? I mean Vector2(0,0) not Vector2(0.5f, 0.5f). If not you should round up.
This is better site to ask questions about game programming:
https://gamedev.stackexchange.com/