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I'm new here im learning xcode and swift by myself and things are going well.
I wanted to ask what will be the best way (and most exact way) to measure short distances let's say up to 10 meters inside of a building so I cant use GPS
I want to get results in millimeters or centimeters.
Thank you for your time guys
Calculating distances based on device movement and using gyroscope, accelerometer, and other internal sensors is impossible.
There are a few reason why but see this link for an explanation...
https://www.youtube.com/watch?v=_q_8d0E3tDk&list=UUj_UmpoD8Ph_EcyN_xEXrUQ&spfreload=10
Use iBeacon and CoreLocation framework. Here is a video from last WWDC that touches this subject
Taking CoreLocation Indoors
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I want to build an app that locate and track people by iPhone using Gyro+Accelerometer. No need for GPS here.
How should I approach this problem?
Unfortunately it's not feasible to track device position based on accelerometer and gyro.
In order to calculate position from accelerometer data double integration needs to be applied, integration amplifies noise and turns it to drift, so even small measurement error would create huge position drift. Similar problem appears for gyro as well.
You can find more details here:
http://www.youtube.com/watch?v=C7JQ7Rpwn2k&t=23m20s
You don't!
The values retrieved from the gyroscope and accelerometer are "relative" to the device. They have no absolute meaning which you would need to retrieve some kind of location.
You can theoretically measure / calculate what way a device has taken but you do not know if the user took that way in Germany, China or the USA. You know he went right, then left, then 200m straight - but that is not of any help if you do not know from where he originated.
That being said, if you do have the initial position you can theoretically calculate the new position based on the measured values. But that calculation is probably far to error prone and far to inexact. If you try to measure the values over the course of a few minutes or even hours you will probably get an measurement that is many meters or even kilometers off.
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I want to build a simple iOS Application with iBeacons.
I have four iBeacons and my goal is to calculate my room position by doing Trilateration. I want to show the room on the display, set the fixed positions of the iBeacons and then calculate the Position and show it on the display.
My problem is, I don't know how to start.
Even though iBeacons are relatively simple to use, trilateration done with them is far from that. The standard is meant for simply determining your current location zone from the nearest beacon. The zones are: immediate (0-0,5m), near (0,5-2m), far (2-20m). Due to the instability of the signal, it is difficult to obtain more precise location data.
That being said, there are a couple of companies that I know, who have worked with that issue: Estimote (Estimote Indoor SDK) and Steerpath. Maybe looking at those two solutions could help you get started with your project.
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I want to dynamically create realistic clouds including their movement and multiplication (density). I found this link which seem to explain more than I can understand. I cannot find a way to replicate the clouds and there is practically no other tutorial online. Does anyone know how can I achieve this result? Thank you in advance!
use scene kit you can make a dynamic particle effect:
https://developer.apple.com/library/prerelease/ios/samplecode/SceneKitVehicle/Introduction/Intro.html
in this example you can find, after the vehicles code, the smoke animation. You can gat all the stuff you need from there, like smoke.scnp, smoke.png.
You need to change some row of code like the smoke color, the light color and the camera position.
But with that i guess you can have one of the best result possible, as real time cloud simulation, in iOS.
(other solution would be using openGL but trust me this is a ton easier)
maybe this guide can also be useful to understand the basis (you just need them to achieve your clouds) :
http://www.raywenderlich.com/83748/beginning-scene-kit-tutorial
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I want to make a simple game with a sidescrolling map.An object is supposed to move through this "map" and it should include walls and other objects which my moving object can collide with. I have been looking some at spritekit and that seems like the thing I want to use.
My question is how do i make that kind of side-scrolling map which includes walls and other objects?
The sample "Adventure" project from Apple (and the accompanying documentation) provides scrolling maps, walls, and the rest of what you're looking for. It's top-down, not side-scrolling, but all the principals are the same. The only thing you'd need to make it properly side-scrolling is new art and gravity (which the SpriteKit tutorial does a reasonable job of explaining).
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I know about mapxbox/routeme and routeme but I need something basic. I need a basic map with all the countries and the only details it would be the name of the countries and the borders.
Can I do that with mapbox? Is there any easier way to do that?
The app should be offline and preload the maps.
iOS 7 support offline maps.
You just need to add tiles for specific area.
Tile contains overlay of map so we just need to add that overlay on the map.
For tiles you need to calculate area for which you need offline map and then get that area from OpenStreetMaps.
That's it.
Here is detailed Link tutorial for this.
After getting idea from tutorial you can easily understand the map structure and move ahead.
Cheers.