219 lines
12 KiB
Plaintext
Executable File
219 lines
12 KiB
Plaintext
Executable File
CURRENT PRIORITIES
|
|
=================================================
|
|
Smooth avatar movement with motor
|
|
Should motor update be all at taint-time?
|
|
Enable vehicle border crossings (at least as poorly as ODE)
|
|
Terrain skirts
|
|
Avatar created in previous region and not new region when crossing border
|
|
Vehicle recreated in new sim at small Z value (offset from root value?) (DONE)
|
|
Vehicle movement on terrain smoothness
|
|
Vehicle script tuning/debugging
|
|
Avanti speed script
|
|
Weapon shooter script
|
|
limitMotorUp calibration (more down?)
|
|
|
|
CRASHES
|
|
=================================================
|
|
20121129.1411: editting/moving phys object across region boundries causes crash
|
|
getPos-> btRigidBody::upcast -> getBodyType -> BOOM
|
|
20121128.1600: mesh object not rezzing (no physics mesh).
|
|
Causes many errors. Doesn't stop after first error with box shape.
|
|
Eventually crashes when deleting the object.
|
|
20121206.1434: rez Sam-pan into OSGrid BulletSim11 region
|
|
Immediate simulator crash. Mono does not output any stacktrace and
|
|
log just stops after reporting taint-time linking of the linkset.
|
|
|
|
VEHICLES TODO LIST:
|
|
=================================================
|
|
Border crossing with linked vehicle causes crash
|
|
Vehicles (Move smoothly)
|
|
Add vehicle collisions so IsColliding is properly reported.
|
|
Needed for banking, limitMotorUp, movementLimiting, ...
|
|
Some vehicles should not be able to turn if no speed or off ground.
|
|
Cannot edit/move a vehicle being ridden: it jumps back to the origional position.
|
|
Neb car jiggling left and right
|
|
Happens on terrain and any other mesh object. Flat cubes are much smoother.
|
|
This has been reduced but not eliminated.
|
|
Implement referenceFrame for all the motion routines.
|
|
Angular motion around Z moves the vehicle in world Z and not vehicle Z in ODE.
|
|
Verify that angular motion specified around Z moves in the vehicle coordinates.
|
|
Verify llGetVel() is returning a smooth and good value for vehicle movement.
|
|
llGetVel() should return the root's velocity if requested in a child prim.
|
|
Implement function efficiency for lineaar and angular motion.
|
|
After getting off a vehicle, the root prim is phantom (can be walked through)
|
|
Need to force a position update for the root prim after compound shape destruction
|
|
Linkset explosion after three "rides" on Nebadon lite vehicle (LinksetConstraint)
|
|
For limitMotorUp, use raycast down to find if vehicle is in the air.
|
|
Remove vehicle angular velocity zeroing in BSPrim.UpdateProperties().
|
|
A kludge that isn't fixing the real problem of Bullet adding extra motion.
|
|
Incorporate inter-relationship of angular corrections. For instance, angularDeflection
|
|
and angularMotorUp will compute same X or Y correction. When added together
|
|
creates over-correction and over-shoot and wabbling.
|
|
|
|
BULLETSIM TODO LIST:
|
|
=================================================
|
|
Revisit CollisionMargin. Builders notice the 0.04 spacing between prims.
|
|
Duplicating a physical prim causes old prim to jump away
|
|
Dup a phys prim and the original become unselected and thus interacts w/ selected prim.
|
|
Scenes with hundred of thousands of static objects take a lot of physics CPU time.
|
|
BSPrim.Force should set a continious force on the prim. The force should be
|
|
applied each tick. Some limits?
|
|
Gun sending shooter flying.
|
|
Collision margin (gap between physical objects lying on each other)
|
|
Boundry checking (crashes related to crossing boundry)
|
|
Add check for border edge position for avatars and objects.
|
|
Verify the events are created for border crossings.
|
|
Avatar rotation (check out changes to ScenePresence for physical rotation)
|
|
Avatar running (what does phys engine need to do?)
|
|
Small physical objects do not interact correctly
|
|
Create chain of .5x.5x.1 torui and make all but top physical so to hang.
|
|
The chain will fall apart and pairs will dance around on ground
|
|
Chains of 1x1x.2 will stay connected but will dance.
|
|
Chains above 2x2x.4 are move stable and get stablier as torui get larger.
|
|
Add PID motor for avatar movement (slow to stop, ...)
|
|
setForce should set a constant force. Different than AddImpulse.
|
|
Implement raycast.
|
|
Implement ShapeCollection.Dispose()
|
|
Implement water as a plain so raycasting and collisions can happen with same.
|
|
Add osGetPhysicsEngineName() so scripters can tell whether BulletSim or ODE
|
|
Also osGetPhysicsEngineVerion() maybe.
|
|
Linkset.Position and Linkset.Orientation requre rewrite to properly return
|
|
child position. LinksetConstraint acts like it's at taint time!!
|
|
Implement LockAngularMotion -- implements llSetStatus(ROTATE_AXIS_*, T/F)
|
|
Should the different PID factors have non-equal contributions for different
|
|
values of Efficiency?
|
|
|
|
LINKSETS
|
|
======================================================
|
|
Linksets should allow collisions to individual children
|
|
Add LocalID to children shapes in LinksetCompound and create events for individuals
|
|
LinksetCompound: when one of the children changes orientation (like tires
|
|
turning on a vehicle, the whole compound object is rebuilt. Optimize this
|
|
so orientation/position of individual children can change without a rebuild.
|
|
Verify/think through scripts in children of linksets. What do they reference
|
|
and return when getting position, velocity, ...
|
|
Confirm constraint linksets still work after making all the changes for compound linksets.
|
|
Add 'changed' flag or similar to reduce the number of times a linkset is rebuilt.
|
|
For compound linksets, add ability to remove or reposition individual child shapes.
|
|
Disable activity of passive linkset children.
|
|
Since the linkset is a compound object, the old prims are left lying
|
|
around and need to be phantomized so they don't collide, ...
|
|
Speed up creation of large physical linksets
|
|
For instance, sitting in Neb's car (130 prims) takes several seconds to become physical.
|
|
REALLY bad for very large physical linksets (freezes the sim for many seconds).
|
|
Eliminate collisions between objects in a linkset. (LinksetConstraint)
|
|
Have UserPointer point to struct with localID and linksetID?
|
|
Objects in original linkset still collide with each other?
|
|
|
|
MORE
|
|
======================================================
|
|
Test avatar walking up stairs. How does compare with SL.
|
|
Radius of the capsule affects ability to climb edges.
|
|
Debounce avatar contact so legs don't keep folding up when standing.
|
|
Implement LSL physics controls. Like STATUS_ROTATE_X.
|
|
Add border extensions to terrain to help region crossings and objects leaving region.
|
|
|
|
Performance test with lots of avatars. Can BulletSim support a thousand?
|
|
Optimize collisions in C++: only send up to the object subscribed to collisions.
|
|
Use collision subscription and remove the collsion(A,B) and collision(B,A)
|
|
Check whether SimMotionState needs large if statement (see TODO).
|
|
|
|
Implement 'top colliders' info.
|
|
Avatar jump
|
|
Performance measurement and changes to make quicker.
|
|
Implement detailed physics stats (GetStats()).
|
|
|
|
Measure performance improvement from hulls
|
|
Test not using ghost objects for volume detect implementation.
|
|
Performance of closures and delegates for taint processing
|
|
Are there faster ways?
|
|
Is any slowdown introduced by the existing implementation significant?
|
|
Is there are more efficient method of implementing pre and post step actions?
|
|
See http://www.codeproject.com/Articles/29922/Weak-Events-in-C
|
|
|
|
Physics Arena central pyramid: why is one side permiable?
|
|
|
|
INTERNAL IMPROVEMENT/CLEANUP
|
|
=================================================
|
|
Consider moving prim/character body and shape destruction in destroy()
|
|
to postTimeTime rather than protecting all the potential sets that
|
|
might have been queued up.
|
|
Remove unused fields from ShapeData (not used in API2)
|
|
Remove unused fields from pinned memory shared parameter block
|
|
Create parameter variables in BSScene to replace same.
|
|
Breakout code for mesh/hull/compound/native into separate BSShape* classes
|
|
Standardize access to building and reference code.
|
|
The skeleton classes are in the sources but are not complete or linked in.
|
|
Make BSBody and BSShape real classes to centralize creation/changin/destruction
|
|
Convert state and parameter calls from BulletSimAPI direct calls to
|
|
calls on BSBody and BSShape
|
|
Generalize Dynamics and PID with standardized motors.
|
|
Generalize Linkset and vehicles into PropertyManagers
|
|
Methods for Refresh, RemoveBodyDependencies, RestoreBodyDependencies
|
|
Potentially add events for shape destruction, etc.
|
|
Complete implemention of preStepActions
|
|
Replace vehicle step call with prestep event.
|
|
Is there a need for postStepActions? postStepTaints?
|
|
Implement linkset by setting position of children when root updated. (LinksetManual)
|
|
Linkset implementation using manual prim movement.
|
|
LinkablePrim class? Would that simplify/centralize the linkset logic?
|
|
BSScene.UpdateParameterSet() is broken. How to set params on objects?
|
|
Remove HeightmapInfo from terrain specification
|
|
Since C++ code does not need terrain height, this structure et al are not needed.
|
|
Add floating motor for BS_FLOATS_ON_WATER so prim and avatar will
|
|
bob at the water level. BSPrim.PositionSanityCheck().
|
|
Should taints check for existance or activeness of target?
|
|
When destroying linksets/etc, taints can be generated for objects that are
|
|
actually gone when the taint happens. Crashes don't happen because the taint closure
|
|
keeps the object from being freed, but that is just an accident.
|
|
Possibly have and 'active' flag that is checked by the taint processor?
|
|
|
|
THREADING
|
|
=================================================
|
|
Do taint action immediately if not actually executing Bullet.
|
|
Add lock around Bullet execution and just do taint actions if simulation is not happening.
|
|
|
|
DONE DONE DONE DONE
|
|
=================================================
|
|
Cleanup code in BSDynamics by using motors. (Resolution: started)
|
|
Consider implementing terrain with a mesh rather than heightmap. (Resolution: done)
|
|
Would have better and adjustable resolution.
|
|
Build terrain mesh so heighmap is height of the center of the square meter.
|
|
Resolution: NOT DONE: SL and ODE define meter square as being at one corner with one diagional.
|
|
Terrain as mesh. (Resolution: done)
|
|
How are static linksets seen by the physics engine?
|
|
Resolution: they are not linked in physics. When moved, all the children are repositioned.
|
|
Convert BSCharacter to use all API2 (Resolution: done)
|
|
Avatar pushing difficult (too heavy?)
|
|
Use asset service passed to BulletSim to get sculptie bodies, etc. (Resolution: done)
|
|
Remove old code in DLL (all non-API2 stuff). (Resolution: done)
|
|
Measurements of mega-physical prim performance (with graph) (Resolution: done, email)
|
|
Debug Bullet internal stats output (why is timing all wrong?)
|
|
Resolution: Bullet stats logging only works with a single instance of Bullet (one region).
|
|
Implement meshes or just verify that they work. (Resolution: they do!)
|
|
Do prim hash codes work for sculpties and meshes? (Resolution: yes)
|
|
Linkset implementation using compound shapes. (Resolution: implemented LinksetCompound)
|
|
Compound shapes will need the LocalID in the shapes and collision
|
|
processing to get it from there.
|
|
Light cycle not banking (Resolution: It doesn't. Banking is roll adding yaw.)
|
|
Package Bullet source mods for Bullet internal stats output
|
|
(Resolution: move code into WorldData.h rather than relying on patches)
|
|
Single prim vehicles don't seem to properly vehiclize.
|
|
(Resolution: mass was not getting set properly for single prim linksets)
|
|
Add material type linkage and input all the material property definitions.
|
|
Skeleton classes and table are in the sources but are not filled or used.
|
|
(Resolution:
|
|
Neb vehicle taking > 25ms of physics time!!
|
|
(Resolution: compound linksets were being rebuild WAY too often)
|
|
Avatar height off after unsitting (floats off ground)
|
|
Editting appearance then moving restores.
|
|
Must not be initializing height when recreating capsule after unsit.
|
|
(Resolution: confusion of scale vs size for native objects removed)
|
|
Light cycle falling over when driving (Resolution: implemented angularMotorUp)
|
|
Should vehicle angular/linear movement friction happen after all the components
|
|
or does it only apply to the basic movement?
|
|
(Resolution: friction added before returning newly computed motor value.
|
|
What is expected by some vehicles (turning up friction to moderate speed))
|
|
Tune terrain/object friction to be closer to SL.
|
|
(Resolution: added material type with friction and resolution)
|