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3D-Tech News Around The Web / New features in Qt 5.5
« Last post by JeGX on February 20, 2015, 05:20:45 PM »
Qt 5.5 will be shipped soon and here is a lit of the new features:



- Qt 3D
    - The Qt 3D module is now included as a technology preview.

- Qt Canvas 3D
    - Added Qt Canvas 3D module, a JavaScript 3D rendering API for Qt Quick.

- Qt Multimedia
    -  GStreamer 1.0 support. Note that the default is still 0.10. 1.0 support can be enabled by configuring Qt with ‘-gstreamer 1.0’.


"The rate of Linux development is unmatched," the foundation said in an announcement accompanying the report. "In fact, Linux kernel 3.15 was the busiest development cycle in the kernel’s history. This rate of change continues to increase, as does the number of developers and companies involved in the process. The average number of changes accepted into the kernel per hour is 7.71, which translates to 185 changes every day and nearly 1,300 per week. The average days of development per release decreased from 70 days to 66 days."


Each Linux release includes more than 10,000 patches from more than 1,400 developers and more than 200 corporations. "Since the 2.6.11 release, the top ten developers have contributed 36,664 changes—8.2 percent of the total. The top thirty developers contributed just over 17 percent of the total," the report said.

Complete story:
3D-Tech News Around The Web / The Poor Man's Voxel Engine
« Last post by JeGX on February 20, 2015, 03:16:59 PM »
Clearly, this article is mostly useless if you're interested in writing your own voxel engine. The final result is far from perfect. I just want to share the petty drama of my past four and a half years. I for one thoroughly enjoy reading about other people's struggles. Maybe that's weird.

Full story:

Game engine:
3D-Tech News Around The Web / NVIDIA decided to restore overclocking on mobile GPUs
« Last post by JeGX on February 20, 2015, 03:10:30 PM »
Under pressure from users angry with NVIDIA for disabling overclocking on mobile-GPUs in the GTX 900M series, with its most recent driver update, the company decided to restore overclocking with its next driver update scheduled for March. To those who want overclocking right now (to make certain games at certain settings playable again), NVIDIA suggests reverting to the older GeForce 344.75 drivers. With the most recent driver update, NVIDIA controversially disabled overclocking on its GeForce GTX 900M mobile GPUs, causing angry comments on its GeForce user forums.

3D-Tech News Around The Web / XL C/C++ for Linux on z Systems
« Last post by gyg on February 20, 2015, 02:41:17 PM »
"BM XL C/C++ for Linux on z Systems is an advanced optimizing compiler for application development that takes advantage of the latest IBM z Systems servers that run on select Linux distributions.
This trial is fully functional for an evaluation period of 60 days."
English forum / Re: GPU buffers
« Last post by Adik on February 19, 2015, 04:46:47 PM »
Thanks for the GLSL Hacker software and also for the gh_gpu_buffer lib.

I am trying to do some GP computation using GLSL compute shaders and store my results in SSBO. Please, could you provide me with an example how to use the sub_data_read1ui function to read the results back from graphics card?
I tried to figure it out by myself, but the function is not used in the Code pack, I also didn't found reference for the gh_gpu_buffer library and also was not able to figure it out from sources, since I read that the project is closed-source.

Thanks in advance,
GpuTest / GpuTest 0.7.0 - running from command line: does not always 'quit'
« Last post by jorgk on February 19, 2015, 03:17:04 PM »
Post your feedbacks, bug reports...

Running GPUtest (for OSX, x64_0.7.0) from the command line to stress the GPU (you know, late-2011 Macbook Pro's, 15" or 17", all suffer from Radeongate ...).

Worked just fine for a wile, but since recently rather frequently the GPUtest just stalls at its end and does not quit. This is with a fixed benchmark duration setting (e.g. like /benchmark_duration_ms=38000 ). Any idea?

Not sure if that already would qualify for a new logic board from Apple.

Was perfect for stressing: Together with the Intel-Power-Gadget one could manually find good parameters to get the temperature to fluctuate most extremely (e.g. going from 57ºC to 97ºC, then stop the GPUtest and allow to cool for some time again, then from the beginning).

The command line specified in Terminal:
MacXXX:~ myaccount$ for i in {1..500}; do open -g -W '/Applications/Utilities/GpuTest_OSX_x64_0.7.0/' --args '/test=fur /width=120 /height=70 /msaa=4 /benchmark /no_scorebox /no_log_score /benchmark_duration_ms=38000'; sleep 80; done

3D-Tech News Around The Web / Persistent Mapped Buffers in OpenGL 4.4
« Last post by JeGX on February 17, 2015, 09:11:40 PM »
It appeared in ARB_buffer_storage and it become core in OpenGL 4.4. It allows you to map buffer once and keep the pointer forever. No need to unmap it and release the pointer to the driver... all the magic happens underneath.

Persistent Mapping is also included in modern OpenGL set of techniques called AZDO - Aproaching Zero Driver Overhead. As you can imagine, by mapping buffer only once we significantly reduce number of heavy OpenGL function calls and what's more important, fight synchronization problems.

NVIDIA disables OC pretty well for notebook due to be too hot and to the micro-tower. :)

We remember OC may void warranty - it's very fair. ;)
3D-Tech News Around The Web / Re: Nim Programming Language Gaining Traction
« Last post by JeGX on February 17, 2015, 04:04:39 PM »
Nim programming language homepage:

Nim tutorial (part 1):
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