React Native Circular Slider? - react-native

I've tried to look through several libraries of React Native circular sliders, however none of them work as intended. All of them suffer the same bug where they randomly change values as you slide. A example would be:
What I am looking for, is a circular slider with it's value in the middle of the slider, very much so like this:
Thank you in advance
Edit: I've added a test repo if you want to play around with it. I've tried my best, but this is the best I could do
https://github.com/2joocy/SliderTest
The code was taken from here:
https://github.com/steveliles/react-native-circular-slider-example

I haven't worked with circle slider yet. But I tried to search and there are 2 repos. Maybe that is what you need.
https://github.com/bgryszko/react-native-circular-slider
https://github.com/raymondchooi/react-native-circle-slider
Good luck!

Related

How to do elastic animation while swiping?

I'm setting up an on boarding screen with 4 screens using react-native-swiper. While swiping i need elastic animation which i cant able to do.I have gone through many tutorials and npm packages as well from past three days but cant able to get the solution.
I need animation something like this .
Any Suggestions appreciated
I think this is going to be really hard. If it isn't absolutely necessary, I would cut that. Otherwise, the direction I can suggest to you is first building this animation, then building your own custom swiper on top. The only way I can see of doing this is maybe an animation of a SVG. For those, I would recommend react-native-svg and react-native-reanimated.
Another solution, if you can find a version of this for Android as you did for iOS, you can build a library that does this. Either way, I don't know your level of expertise in React Native, but I would strongly suggest against trying to tackle a problem like this unless you feel confident in doing so.
If you do feel confortable, and you have any questions, feel free to message me, and good luck!

Blender images rendering w/out color

When I render an image in blender it just comes out black even when I color it.
This stool is supposed to be different materials but instead this.
Please help I have tried things from at least ten different sites and none have worked.
Also using Cycles Render.
You need to add light to the scene. If this doesn't work, you can link the file here so I can help you. Good luck!

How to achieve this image distortion effect in iOS?

I'm building an iphone photo app. I don't know how to achieve this kind of effect on an image:
When the user drags a finger across the arrow, I want the image to be distorted accordingly. How can I achieve this? Is there any framework that makes this process simple?
Thank you.
No clue about iOS, but the look reminds me of a thin-plate spline warp. It's quite easy to implement in OpenGL, a quick Google search for example code returns plenty of hits.
From the sound of it I think your looking for the CoreImage framework. Look into the various distortion effects...in particular CIBumpDistortionLinear.
I don't have any code so check out this tutorial and read up on CoreImage.

Improve perfomance of my threejs

I have some issues about my model. Is is an easy model buy I can not make It work well...
I upload my project here: http://webgl.drapps.info
I have a car model with some pieces that change material when mouse is over them. I use threex.domevent.js library with "on" function. My model is loaded by json files.
Issue 1
when mouse is out of canvas, threejs detects that mouse is over a piece of my model, but this is not true, and that piece change its material (triggering mouseOver event).
Furthermore, I tried to get better mouseover event because even when mouse is really over a piece, that event doesn't trigger.
Issue 2
This is about TrackballControls. Is there any way to control rotation of my world? I mean: rotation only in one axis, rotation only for 180 degrees, etc... Is there any tutorial or article to learn how to rotate and translate camera?
Thanks for everything, I will so please to anybody who wants answer this... because I am a little lost
Thanks
Sorry, but you are out of luck.
Question 1. Yikes! You are using threex.js which is a third-party app that hasn't been updated in almost a year, so I can't help you with that.
You are also using an older version of three.js. Please update to the current version.
If you still have problems, post a new question with a simple demo -- not your entire project. Better yet, Google your question first.
Question 2. TrackballControls is not part of the library -- it is part of the examples -- so it is not officially supported. If you are not happy with it, you will have to hack the code yourself.
This question has come up a lot. Google it. To the best of my knowledge, there is not a good solution.
Personally, I would use OrbitControls in your case -- it keeps the scene right-side-up, and you can constrain the maximum polar angle, keeping the camera "above ground".
The best examples/tutorials are the official three.js examples, which will work with the current version of the library.
I can't help with issue 1.
Issue2:
I am also working on a project to visualize vehicles and needed to be able to rotate. I also tried Trackballcontrolls but it did not suit my needs.
What I ended up doing was creating a a master Object3d and then instead of adding objects/models to the scene, I added them to the master Object3d. That way to rotate everything in the scene, I just had to rotate the master object.
To actually do the rotation I just used the code from one of the cube examples.

OpenCV cvFindContours questions

I'm following this guide: http://www.aishack.in/2010/08/sudoku-grabber-with-opencv/2/
and modifying to iOS 5.0.
I managed to find the largest contour (the sudoku "board"), however, it only locates the surrounding square, without the lines inside, as in the tutorial. can this be easily solved?
I'll try and find a way around it, but still would like to know. thanks!
I assume that you are using the camera right now. Try to load the image what is used in the tutorial and check if your implementation works on that image. Then you can continue with nice sudoku images from the web. You may also change the camera angle and distance from the sudoku when taking pictures to get a better, clearer view.