IdTech4 Open Source: Difference between revisions
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|No instancing. Multiple instances of the same model are all rendered one by one, instead of uploading it once and then telling the graphic card to render them all in one go. | |No instancing. Multiple instances of the same model are all rendered one by one, instead of uploading it once and then telling the graphic card to render them all in one go. | ||
|Performance increase. | |Performance increase. | ||
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|No access to the Z-Buffer. Without access to this data, any depth-based fragment shader effects like SSAO or Depth of Field require an extremely expensive z-pass render. | |No access to the Z-Buffer. Without access to this data, any depth-based fragment shader effects like SSAO or Depth of Field require an extremely expensive z-pass render. | ||
|Performance increase. | |Performance increase. | ||
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Revision as of 15:41, 29 October 2010
id Software has a long history making the code to their engines open source after a while. Even after being sold to Zenimax, this trend continued. The source code can be found on the officiel FTP server from id software.
So there is hope that idTech4 (the engine behind Doom 3 and Quake 4) will also be open sourced. For The Dark Mod this means that we can fix a long list of issues that are currently not possible.
Here is a small, incomplete list, in no particular order:
Todo: add more examples
| Category | Issue | Possible outcome | |
|---|---|---|---|
| Sound | EAX does not work under Linux. | Works there, too. | |
| Graphic | The lightgem needs to render to a texture and transfer this texture back to the CPU via a complicated in-memory file scheme. | Performance increase. | |
| Graphic | No instancing. Multiple instances of the same model are all rendered one by one, instead of uploading it once and then telling the graphic card to render them all in one go. | Performance increase. | |
| Graphic | No access to the Z-Buffer. Without access to this data, any depth-based fragment shader effects like SSAO or Depth of Field require an extremely expensive z-pass render. | Performance increase. |
