infosraka.blogg.se - Bitmap snapchat creative kit sticker android

#Bitmap snapchat creative kit sticker android how to
#Bitmap snapchat creative kit sticker android android
#Bitmap snapchat creative kit sticker android Pc

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#Bitmap snapchat creative kit sticker android Pc

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Using it we don’t need to perform all the math by ourselves (which can be tricky sometimes). So, let’s transform a matrix with our model. Resulting matrix will look like: L = S * R * T * S` Let the transformation matrix for holy scale be S`. You need to also apply the holy scale described above. Note, that applying the transformations in a different order will have some interesting and funny consequences, just try it.

You can find on the web why it works like that. To get the correct transformation matrix L, we need to apply the transformation in the following way: L = S * R * T Each of the transformations can be represented by its own transformation matrix: S, R, T. In 2D users can scale theimage, rotate and translate it. “All problems in computer graphics can be solved with a matrix inversion” Jim Blinn It could have a steep learning curve, yet when you get familiar with them - it does pay off. When working with image transformation it’s usually best to use matrices. Ok, now that you have the model, the holy scale, it’s time to do some magic with the image. For the preview we can show user images of the lower quality, and when saving to disk - better ones. Only need to recalculate the holy scale of the image.Īlso, you don’t need to save the value, just calculate it when you need it. And without changing the model - you’ll have the same relative sticker position and size. What is good about this param is that you can resize canvas or take images of the different quality. It is basically a dynamic variable that depends on the size of the sticker and the canvas. Let’s define our model the following way: The solution needs to work on different screen sizes and be independent of the image quality. And if they open their custom works on other devices - the screen size might change, the loaded images might be of a different quality, etc.Īs you might have guessed, the task is getting more complicated now. Moreover, it could be the case that you would need to enable users to save/edit their selfies.

#Bitmap snapchat creative kit sticker android android

First, there is a zillion of screen sizes of Android devices, and we’d better support them all (or as many as we can). So the task is pretty simple: add the ability to move, scale and rotate stickers on Android.Įven though it sounds easy, there are a couple of challenges as well.

#Bitmap snapchat creative kit sticker android how to

In this article you’ll learn how to move, scale and rotate images on Android, enabling customers to create super fancy selfies (like the Snapchat’s). After spending 2000+ hours and releasing 4+ successful apps working with image transformations, we’ve decided to share our experience with the community.