In this article I want to tell you about the experience of developing one unpretentious game for Android, which has repeatedly paid off at the development stage!

Prehistory
We started developing the game in the 10th grade. Before that, we had no experience in developing and promoting mobile games. There were only basic knowledge of Java and a little experience of creating websites. And that's all!

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KlauS 23 october 2017, 13:55

Due to the fact that a relatively large (and very loud) part of IT lives in the next bubble of dotcoms (now startups), some representatives of this tribe, and especially all Evangelists and even HR, have the illusion of the following property.

A pier, any device, a framework or a way of operation sharply raises success of the enterprise. For example, "we all use the MacBook, and we already have a third round of investment." Or "we decided to open a travel agency, and hire only those programmers who do not get out of travel; we want all employees to share our values, and we already have a turnover of $ 100 million. " Or "as soon as we implemented React + Vue + Angular, our business went uphill, and we bought Google." And so on.

At first glance it seems absurd? - Yes, but we admit: Hype and hubbub are indisputable accompanying elements of the modern IT-world. Any phenomenon that is on the edge of public attention, and IT, of course, from such, can not absorb the characteristic features of the society of its time. In particular, the tendency to prevalence of form over content.

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KlauS 21 october 2017, 16:54

Hello friends!
I wrote a library for finding paths on arbitrary graphs, and I would like to share it with you .
An example of use on a huge graph:

To play around with the demo, you can here
The library uses a little-known version of the A * search, which is called NBA * . This is a bidirectional search, with relaxed requirements for the heuristic function, and a very aggressive termination criterion. Despite its little-known algorithm, the algorithm has an excellent speed of convergence to the optimal solution.
The description of the various variants of A * has already been found on the hub several times. I really liked this is , so I will not repeat this article. Under the cut I will explain in more detail why the library works quickly and how the demo was done.
KlauS 21 october 2017, 10:55

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In this article, I'll talk about some of the ideas on which high-level parts of Android are built, about several of its predecessors and about the basic mechanisms of security.
KlauS 21 october 2017, 10:51

I'm used to looking for problems in code or in the system, using logs or monitoring indicators, which are displayed on pretty control panels with a simple and intuitive interface. However, if for some reason the data does not arrive to the control panel, or the logs of some service are unavailable, debugging becomes more complicated. Now there are few such problems, they are rare, but they do happen. Therefore, in our time is very valuable knowledge of tools that help to understand what is wrong with a certain process on any computer.

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KlauS 20 october 2017, 15:22

China is funding the development of the world's first prototype supercomputer for exaflop computing. The speed of the system will be a quintillion operations per second. Such a capacity the country will send to support the program of marine research.

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KlauS 7 october 2017, 10:49

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These are the principles of software development, taken from the Robert Martin Clean Code book and adapted for PHP. This manual is not a programming style, but to create a readable, reusable and refactoring-friendly PHP code.
Not each of these principles should be strictly observed, and with even fewer will all agree. These are just recommendations, not more, but they are all codified in the author's many years of collective experience.
The article is inspired by clean-code-javascript .
KlauS 7 october 2017, 10:27

Prelude
Developing a game for iOS
Promotion of the game
Purely neighing
Prelude
This story happened in May exactly on the bench where Berlioz and Bezdomny had argued about the essence of Christ. My friends and I also argued about the possibility of making money on our iPhone-game. I said, suddenly, that without investing money it is impossible. Reluctantly my opponents agreed. I strengthened the trolling and added: - My friends, without big money it's absolutely impossible! Any amount less than $ 25,000, spent on the promotion of the application - will turn into a zipper. Пшшшш!

Everyone was indignant and drove me off the bench. At the same time, and from Moscow.

Following the publication of image

Following the publication of the flared up serious competition for the Cup 26-08.
Players with Habra are so strong that on the first day they kicked me from the top of Olympus. But! In the first tower I found a solution for 2 points better than the others. And I won guys from Ukraine and Russia.
We can still!

KlauS 6 october 2017, 11:24

It's hard to argue that the landscape is an integral part of most computer games in open spaces. The traditional method of realizing the change in the relief of the surrounding surface player is the following - take the mesh, which is a plane and for each primitive in this grid, we make a displacement along the normal to this plane by a value specific for this primitive. In simple words, we have a single-channel texture of 256 by 256 pixels and a grid plane. For each primitive from its coordinates on the plane, we take the value from the texture. Now we simply move the coordinates of the primitive along the normal to the plane by the resulting value (Fig. 1)

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Pic.1 map of heights + plane = terrain

Why does this work? If we imagine that the player is on the surface of a sphere, and the radius of this sphere is extremely large in relation to the size of the player, then the curvature of the surface can be neglected and a plane can be used. But what if we do not neglect the fact that we are on the sphere? I would like to share my experience of constructing such landscapes with the reader in this article.
KlauS 6 october 2017, 11:22

The order of evaluation of expressions is determined by a particular implementation, except when the language guarantees a certain order of calculations. If, in addition to the result, evaluating the expression causes changes in the runtime, then the expression is said to have side effects.
MSDN
In our internal newsletter about C #, a regular question arises, which concerns the correct interpretation of such constructions:

a -= a *= a;
p[x++] = ++x;
In response, I ask:
Yes, who writes such a code with an imperturbable look? It's one thing when you write this, trying to win at the International COC Contest, or if you want to write a puzzle - but in both cases you realize that you are doing something non-standard. That, there really is someone who writes a - = a * = a and p [x ++] = ++ x; and thinks to himself "Shit, yes I write really cool code! "
KlauS 26 september 2017, 9:31
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