Subject: General Tech | January 20, 2016 - 07:06 PM | Scott Michaud
Tagged: vulkan, ue4, nvidia, Intel, gdc 2016, GDC, epic games, DirectX 12, Codemasters, arm, amd
The 30th Game Developers Conference (GDC) will take place on March 14th through March 18th, with the expo itself starting on March 16th. The sessions have been published at some point, with DX12 and Vulkan prominently featured. While the technologies have not been adopted as quickly as advertised, the direction is definitely forward. In fact, NVIDIA, Khronos Group, and Valve have just finished hosting a developer day for Vulkan. It is coming.
One interesting session will be hosted by Codemasters and Intel, which discusses bringing the F1 2015 engine to DirectX 12. It will highlight a few features they implemented, such as voxel based raytracing using conservative rasterization, which overestimates the size of individual triangles so you don't get edge effects on pixels that are partially influenced by an edge that cuts through a tiny, but not negligible, portion of them. Sites like Game Debate (Update: Whoops, forgot the link) wonder if these features will be patched in to older titles, like F1 2015, or if they're just R&D for future games.
Another keynote will discuss bringing Vulkan to mobile through Unreal Engine 4. This one will be hosted by ARM and Epic Games. Mobile processors have quite a few cores, albeit ones that are slower at single-threaded tasks, and decent GPUs. Being able to keep them loaded will bring their gaming potential up closer to the GPU's theoretical performance, which has surpassed both the Xbox 360 and PlayStation 3, sometimes by a factor of 2 or more.
Many (most?) slide decks and video recordings are available for free after the fact, but we can't really know which ones ahead of time. It should be an interesting year, though.
Digging in a Little Deeper into the DiRT
Over the past few weeks I have had the chance to play the early access "DiRT Rally" title from Codemasters. This is a much more simulation based title that is currently PC only, which is a big switch for Codemasters and how they usually release their premier racing offerings. I was able to get a hold of Paul Coleman from Codemasters and set up a written interview with him. Paul's answers will be in italics.
Who are you, what do you do at Codemasters, and what do you do in your spare time away from the virtual wheel?
Hi my name is Paul Coleman and I am the Chief Games Designer on DiRT Rally. I’m responsible for making sure that the game is the most authentic representation of the sport it can be, I’m essentially representing the player in the studio. In my spare time I enjoy going on road trips with my family in our 1M Coupe. I’ve been co-driving in real world rally events for the last three years and I’ve used that experience to write and voice the co-driver calls in game.
If there is one area that DiRT has really excelled at is keeping frame rate consistent throughout multiple environments. Many games, especially those using cutting edge rendering techniques, often have dramatic frame rate drops at times. How do you get around this while still creating a very impressive looking game?
The engine that DiRT Rally has been built on has been constantly iterated on over the years and we have always been looking at ways of improving the look of the game while maintaining decent performance. That together with the fact that we work closely with GPU manufacturers on each project ensures that we stay current. We also have very strict performance monitoring systems that have come from optimising games for console. These systems have proved very useful when building DiRT Rally even though the game is exclusively on PC.
How do you balance out different controller use cases? While many hard core racers use a wheel, I have seen very competitive racing from people using handheld controllers as well as keyboards. Do you handicap/help those particular implementations so as not to make it overly frustrating to those users? I ask due to the difference in degrees of precision that a gamepad has vs. a wheel that can rotate 900 degrees.
Again this comes back to the fact that we have traditionally developed for console where the primary input device is a handheld controller. This is an area that other sims don’t usually have to worry about but for us it was second nature. There are systems that we have that add a layer between the handheld controller or keyboard and the game which help those guys but the wheel is without a doubt the best way to experience DiRT Rally as it is a direct input.