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Core/Movement: various improvements for creature knockbacks

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* creature knockbacks will no longer generate a full path but instead only use a destination point to reflect sniff data
* calculate the destination by using a mmap raycast instead of using a mmap path which had the chance of creating weird movements when GetNearPosition failed to get a proper collision point (knocking arround a tree for example or just somewhere it should not go at all)

(cherry picked from commit cfd63c350f)
This commit is contained in:
Ovah
2020-04-17 21:13:18 +02:00
committed by Shauren
parent 92ab79bd9a
commit a3d28efcfa
1 changed files with 4 additions and 3 deletions
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7
src/server/game/Movement/MotionMaster.cpp
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@@ -744,15 +744,16 @@ void MotionMaster::MoveKnockbackFrom(Position const& origin, float speedXY, floa
if (speedXY < 0.01f)
return;
float x, y, z;
Position dest = _owner->GetPosition();
float moveTimeHalf = speedZ / Movement::gravity;
float dist = 2 * moveTimeHalf * speedXY;
float max_height = -Movement::computeFallElevation(moveTimeHalf, false, -speedZ);
_owner->GetNearPoint(_owner, x, y, z, dist, _owner->GetAbsoluteAngle(origin) + float(M_PI));
// Use a mmap raycast to get a valid destination.
_owner->MovePositionToFirstCollision(dest, dist, _owner->GetRelativeAngle(origin) + float(M_PI));
Movement::MoveSplineInit init(_owner);
init.MoveTo(x, y, z);
init.MoveTo(dest.GetPositionX(), dest.GetPositionY(), dest.GetPositionZ(), false);
init.SetParabolic(max_height, 0);
init.SetOrientationFixed(true);
init.SetVelocity(speedXY);