| 14 | } |
| 15 | |
| 16 | void SplineRopeBody::Tick() |
| 17 | { |
| 18 | if (!_spline || _spline->GetSplinePointsCount() < 2) |
| 19 | return; |
| 20 | PROFILE_CPU(); |
| 21 | PROFILE_MEM(Physics); |
| 22 | |
| 23 | // Cache data |
| 24 | const Vector3 gravity = GetPhysicsScene()->GetGravity() * GravityScale; |
| 25 | auto& keyframes = _spline->Curve.GetKeyframes(); |
| 26 | const Transform splineTransform = _spline->GetTransform(); |
| 27 | const int32 keyframesCount = keyframes.Count(); |
| 28 | const float substepTime = SubstepTime; |
| 29 | // TODO: scale substep time based on distance to the camera to have better performance when rope is far away |
| 30 | bool splineDirty = false; |
| 31 | |
| 32 | // Synchronize spline keyframes with simulated masses |
| 33 | if (_masses.Count() > keyframesCount) |
| 34 | _masses.Resize(keyframesCount); |
| 35 | else |
| 36 | { |
| 37 | _masses.EnsureCapacity(keyframesCount); |
| 38 | while (_masses.Count() < keyframesCount) |
| 39 | { |
| 40 | const int32 i = _masses.Count(); |
| 41 | auto& mass = _masses.AddOne(); |
| 42 | mass.Position = mass.PrevPosition = splineTransform.LocalToWorld(keyframes[i].Value.Translation); |
| 43 | if (i != 0) |
| 44 | mass.SegmentLength = Vector3::Distance(mass.PrevPosition, _masses[i - 1].PrevPosition); |
| 45 | else |
| 46 | mass.SegmentLength = 0.0f; |
| 47 | } |
| 48 | } |
| 49 | { |
| 50 | // Rope start |
| 51 | auto& mass = _masses.First(); |
| 52 | mass.Position = GetPosition(); |
| 53 | mass.Unconstrained = false; |
| 54 | if (splineTransform.LocalToWorld(keyframes.First().Value.Translation) != mass.Position) |
| 55 | splineDirty = true; |
| 56 | } |
| 57 | bool syncPositions = true; |
| 58 | if (splineTransform != _splineTransform) |
| 59 | { |
| 60 | _splineTransform = splineTransform; |
| 61 | syncPositions = false; |
| 62 | splineDirty = true; |
| 63 | } |
| 64 | if (syncPositions) |
| 65 | { |
| 66 | for (int32 i = 1; i < keyframesCount; i++) |
| 67 | { |
| 68 | auto& mass = _masses[i]; |
| 69 | mass.Unconstrained = true; |
| 70 | mass.Position = splineTransform.LocalToWorld(keyframes[i].Value.Translation); |
| 71 | } |
| 72 | } |
| 73 | if (AttachEnd) |
nothing calls this directly
no test coverage detected