Of course Swift UI and all the other advancements in coding make it a little bit simpler, but at the design phase, we st

When the avatar walks, his whole environment must be displaced on canvas (since he is always painted in center of canvas). Therefore we must repaint the whole canvas every loop. This is an expensive operation.

Apple solved this problem after iOS 7 by introducing bolder / thicker font weights and getting rid of most of the “light” fonts. But some designers (and even more product owners) like those light fonts as they understand them as “minimal” and “good design” for some reason.

Up until this point we designed for the iPhone X viewport of 375 x 812 and for the larger 414x896. It covered the most individual phones, and the developers adjusted the layout to fit more content (or just be larger) on the few other devices.

The fold is a pretty old concept of an invisible line that separates what we normally see on one screen (without scrolling) and the rest of the design. The notion is that all the most important elements should be “above the fold” for easier access.

Also, some up or down-scaling can lead to bad anti-aliasing in very thin lines as it’s all based on pixel approximation, so if you’re using very thin/light fonts, then you may be missing some legibility.

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to shed light on the darker side of being a data scientist. This article is not meant to discourage you, but like any other job, data science as a career has its downfalls. What I believe is important is that you’re made aware of these things so that when you encounter them in your life, it doesn’t hit you like a truck (like it did for me!).

There were some arguments that “people don’t scroll”, which in modern times sounds a little bit silly (given the fact that we scroll 300meters on average every single day).

The current version of the Chrome FPS Meter features a very important advance. It tells how many frames are dropped (not printed on screen). And shows the percentage of the recent printed frames over all recent produced frames. The maximum value it shows is 99% even when all the frames are printed.

The answer is, it depends. In the case of content consumption, the UI can stay relatively the same size, while the content itself can be enlarged and in much higher quality (in pixels).

If we were to try and fit the same “scrolling height” onto these phones, then we’d end up with some unused space which is not optimal. Obviously it’s a bit exaggerated here, as some of these phones have different aspect ratios — it just means to show a general principle.

The creatures list and the missiles list are small. And are used only for efficiency. Every loop, creatures and missiles must be updated. It is more efficient iterate over the 2 small lists than iterate over a 10 thousand object list.

We could imagine an alternative, cheap repainting system for when the avatar is still. But its a bad idea for 2 reasons. First, it does not help when avatar walks (the game must be performant 100% of the time). Second, this system would be very hard to implement due to the intricated overlapping of the volume elements (creatures, walls, speaks, missiles, trees, etc..), mainly the moving ones, each with its own shape and size.

The weight of game logic, even with the AI of creatures working, is negligible. Running the game without painting takes 0.1 ms or less. Therefore, we will no longer discuss the logic of the game in this article.

Note: the Chrome FPS Meter does not measure performance of a game that runs inside an iframe tag. If the rest of the page is static, the tool tells that no frame was dropped; doesn’t matter how bad can be the performance of the iframed game.

We can see that the average time needed to execute the painting (which is the bottleneck) is 1.7 ms. Much lower than the strict limit of 3 ms that we chose. The worst case was 2.3 ms, also bellow the 3 ms! Excellent!!!