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C# et .Net : Versions 1 a 4

You should have a look to it! I hope that some of you will enjoy this funky experiment. Cependant, vous avez quelques solutions alternatives :. Vous trouverez la signification de ces valeurs dans cet article : Guidelines for Building Touch-friendly Sites. Tout simplement car nous tombons actuellement dans le cas de dernier ressort justement. Il vous indiquera uniquement si le navigateur actuel supporte les MSPointers. Will it be playable or will the gameplay suffer too much? To answer to that question, I often use my own experience based on what I know and what worked well during my own tests.

In the meantime, there were some obvious facts. We know also that combining SVG and Canvas is a good idea to write games that scale across devices but this could also impact the performance. Moreover, even if GPU and hardware acceleration is available on mobile, their hardware architectures differ a lot from the PC and this impacts also a lot the performances. There is dozen of scenarios like that to address and to be aware of while writing HTML5 games for mobiles. But in which proportions? With my friend David Catuhe , we then decided to measure these various scenarios and build a benchmark framework to have a better idea on what to pay attention for.

It took us time to validate it against tools like the ones that ship wit the Windows Performance Toolkit for instance. But this will be an important article to read as we needed to rely on the stability of the framework for all the future benchmarks we will build on top of it. This article will illustrate how to use this tool and will concentrate on the number of sprites you can use in your game to maintain a good frame rate on all platforms.

We will also discover interesting details on how GPU are actually being used during these scenarios. During my various discussions with some games developers, we were often wondering ourselves a list of recurring questions:. Can I use a canvas of x only or can I scale up to x?

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We will then use the famous EaselJS framework from the CreateJS suite as I know it runs everywhere and has already been optimized for performance. The various benchmarks are described like the simplified code below to be able to be integrated in the HTML5 Potatoes Gaming Bench framework:. You will need to build equivalent code to build your own benchmarks that will be monitored by the framework. The key point is to add your benchmark definition into the monitored collection via the registerBench function. Thanks to Modern. IE , you can obtain a 3 months trial.

A very useful tool you should have a look to. You can also run this benchmark in full screen or in a separate window via this link: prefixed sprites numbers series benchmark. At the end, you will have a summary of all benchmarks with a score. The score is simply the number of frames that your device was able to render in 20 seconds. The best logical score is then So it could sometimes occurs where the tick is calling us back just a bit above 16ms, that why you could have some cases where you will have like in the following screenshot:. The good news is that all the modern desktop browsers have some really good hardware acceleration layers in place.

Chrome has an overall score of Firefox 20 has an overall score of The most difficult test for it is to handle the sprites with shadows average of 6 fps vs 12 and 27 for IE10 and Chrome. Except that, it has the exact same scores as IE So, what should we conclude at this stage? In this case, you just have to benchmark IE10 to determine your assets limits.

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But if we think about the web in general, we see that all browsers on can easily handle between and sprites at 60 fps on my desktop machine. But it already gives some interesting data. It can maintain an average of 36 fps for sprites without shadow. So, we already have some interesting information to digest. The same rendering and JavaScript engine IE10 is able to display sprites at 60 fps on a desktop PC using an integrated GPU but sprites is already too much to handle for low-end hardware like the current ARM architectures.

There is a 5X to 10X performance difference between a mobile and a desktop device. So the next step now is to find what is the optimum number of sprites to maintain 60 fps for a good desktop experience and also 30 fps for a relatively good mobile experience. You can also run this benchmark in full screen or in a separate window via this link: launch 30 and 60 fps target series. This time the score provided at the end is the number of optimal sprites to maintain 30 or 60 fps. JS more details here: Creating an universal virtual touch joystick working for all Touch models thanks to Hand.

I was also curious about changing another parameter to confirm some of my thoughts.

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Indeed, all modern browsers are now heavily using them to offload the job needed to be done for the layout engine. I needed then to have the same machine with 2 GPUs available. Everything else should remain the same CPU, memory, hard drive, screen resolution, etc. Using Intel HD, the Vaio is able to display sprites 30fps and sprites 60fps. Using the nVidia GTm, the very same Vaio is able to display sprites 30fps and 60fps.


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Conclusion: you have 3 options here to build a cross-platforms game running fine everywhere. A second option is then to build 2 versions of the game like 2 versions of your websites : 1 for mobile and 1 for phone.

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You will just adjust the graphical complexity based on the performance of each platform. Or you can also take the optimal number on mobile to target 30 fps and you will be sure to run 60 fps on desktop. Lastly, the third and last option is to build a game engine that will itself dynamically adjust the complexity of the graphical engine based on the performance detected.

Something that some game studios are frequently doing on PC for instance. It requires more work for sure and you need also to decide the kind of assets that will be displayed or not in your game without impacting the global gameplay. I was convinced on my side that increasing the resolution would lower the average FPS for sure, even just to display some animated sprites.

You can also run this benchmark in full screen or in a separate window via this link: launch various canvas resolutions series. On my machine, the various resolutions had 0 impact on the average framerate!


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This is also confirmed on my mobile WP8 devices and on Xbox Only Chrome has a lower average FPS only in x for an unknown reason. This just means that for sprites animations, and with this specific benchmark, the resolution has no impact. The GPU seems to take the load without any problem even on mobile platforms. The Intel HD contains up to 12 scalar bit execution units where the nVidia GTm contains 48 bit execution units. There are also tools that help to check the load of the GPU.

This is then a real good option to have in mind. If the frame rate is too low due to a too high GPU load, try to render your canvas in a lower resolution and stretch it full screen using this hardware scaling method. There could be cases where the lost of frames will be due to CPU limited scenarios. To monitor that, you need profiler tools like the one embedded in most recent browsers. You will then see which parts of your code you should try to work on to regain some FPS. Using the F12 tool included in IE10 to profile the code shows the following result:.

So, you just need to deal with it! You can have a look to the set of tools available in the Windows Performance Toolkit and read the following methodology: Measuring Browser Performance with the Windows Performance Tools. With David Catuhe , we had a precise idea why. We can see that this is the GC which is responsible for the drop of some frames. You know what I really like about this whole story? This is really what you should keep in mind to build your games that should scale across all HTML5 compatible devices.

reukebatosa.tk I really hope that this article and our benchmark framework will help you in your future HTML5 games. We will soon work on similar articles focused on other topics important for HTML5 games. In this list, you should then find your favorite language or at least something near your favorite one. So why building a 3D soft engine? When I was young, I was dreaming to be able to write such engines but I had the feeling it was too complex for me.

You simply need someone that will help you understanding the underlying principles in a simple way.

Step 2: creating the HTML & CSS base of our main page

Through this series, you will learn how to project some 3D coordinates X, Y, Z associated to a point a vertex on a 2D screen, how to draw lines between each point, how to fill some triangles, to handle lights, materials and so on. This first tutorial will simply show you how to display 8 points associated to a cube and how to move them in a virtual 3D world.

There is a lot of good resources on the web that will explain those important principles better than I. Read at least up to slide Read those articles by not focusing on the technology associated like OpenGL or DirectX or on the concept of triangles you may have seen in the figures.