hdtSMP with CUDA for Skyrim SE/AE/VR

Fork of [https://github.com/Karonar1/hdtSMP64] by Karonar1, fork of version by aers, from original code by hydrogensaysHDT

Changes

• CommonLibSSE-NG used for building instead of statically linking with SKSE.
• Added maximum angle in ActorManager. A max angle can be used to specify physics on NPCs within a field of view. 0 degrees represents straight in front of the camera. Default is 45 which is treated as + or - 45 degrees, so 90 total degrees. 180 would be all around.
• Merged the CUDA version in the master branch through preprocessor directives to allow a continuous evolution, and easier building.
• Added CUDA support for several parts of collision detection (still a work in progress). This includes everything that had OpenCL support in earlier releases, as well as the final collision check. CPU collision is still fully supported, and is used as a fallback if a CUDA-capable GPU is not available.
• Added distance check in ActorManager to disable NPCs more than a certain distance from the player. This resolves the massive FPS drop in certain cell transitions (such as Blue Palace -> Solitude). Default maximum distance is 500.
• New method for dynamically updating timesteps. This is technically less stable in terms of physics accuracy, but avoids a problem where one very slow frame (for example, where NPCs are added to the scene) causes a feedback loop that drops the framerate. If you saw framerates drop to 12-13 in the Blue Palace or at the Fire Festival, this should help.
• Added can-collide-with-bone to mesh definitions, as a natural counterpart to no-collide-with-bone.
• Added new "external" sharing option, for objects that should collide with other NPCs, but not this one. Good for defining the whole body as a collision mesh for interactions between characters.
• Significant refactoring of armor handling in ActorManager, to be much stricter about disabling systems and reducing gradual FPS loss.
• Changed prefix mechanism to use a simple incrementing value instead of trying to use pointers to objects. Previously this could lead to prefix collisions with a variety of weird effects and occasional crashes.
• Skeletons should remain active as long as they are in the same cell as (and close enough to) the player character. Resolves an issue where entering the Ancestor Glade often incorrectly marked skeletons as inactive and disabled physics.
• Added smp list console command to list tracked NPCs without so much detail - useful for checking which NPCs are active in crowded areas. NPCs are now sorted according to active status, with active ones last.
• New mechanism for remapping mesh names in the defaultBBPs.xml file, allowing much more concise ways of defining complex collision objects for lots of armors at once.
• The code to scan defaultBBPs.xml can now handle the structure of facegen files, which means head part physics should work (with limitations) on NPCs without having to manually edit the facegen data.
• New bones from facegen files should now be added to the head instead of the NPC root, so they should be positioned correctly if there is no physics for them or after a reset.

Known issues

• Several options, including shape and collision definitions on bones, exist but don't seem to do anything.
• Sphere-triangle collision check without penetration defined is obviously wrong, but fixing the test doesn't improve things. Needs further investigation.
• Smp reset doesn't reload meshes correctly for some items (observed with Artesian Cloaks of Skyrim). Suspect references to the original triangle meshes are being dropped when they're no longer needed. We could keep ownership of the meshes, but it seems pretty marginal and a waste of memory. It also breaks some constraints for NPCs with facegen data.
• It's not possible to refer to bones in facegen data that aren't used explicitly by at least one mesh. Most HDT hairs won't work as non-wig hair on NPCs without altering constraints. Probably possible but annoying to fix.
• Physics enabled hair colours are sometimes wrong. This appears to happen there are two NPCs nearby using the same hair model.
• Physics may be less stable due to the new dynamic timestep calculation.
• Probably any open bug listed on Nexus that isn't resolved in changes, above. This list only contains issues I have personally observed.
• Known bugs on the Nexus

Build Instructions And Requirements

See wiki

Credits

• hydrogensaysHDT - Creating this plugin
• aers - fixes and improvements
• ousnius - some fixes, and "consulting"
• karonar1 - bug fixes (the real work), I'm just building it