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Pathfinder - approximated paths when original destination unreachable

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This commit is contained in:
SafwatHalaby
2015-05-16 14:05:33 +03:00
parent 4ffc6621a9
commit 29e31c5be9
5 changed files with 193 additions and 55 deletions
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121
src/Mobs/Monster.cpp
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@@ -89,7 +89,7 @@ cMonster::cMonster(const AString & a_ConfigName, eMonsterType a_MobType, const A
, m_SoundDeath(a_SoundDeath)
, m_AttackRate(3)
, m_AttackDamage(1)
, m_AttackRange(2)
, m_AttackRange(1)
, m_AttackInterval(0)
, m_SightDistance(25)
, m_DropChanceWeapon(0.085f)
@@ -147,10 +147,15 @@ bool cMonster::TickPathFinding(cChunk & a_Chunk)
(Recalculate lots when close, calculate rarely when far) */
if (
((GetPosition() - m_PathFinderDestination).Length() < 0.25) ||
((m_TicksSinceLastPathReset > 10) && (m_TicksSinceLastPathReset > (0.15 * (m_FinalDestination - GetPosition()).SqrLength())))
((m_TicksSinceLastPathReset > 10) && (m_TicksSinceLastPathReset > (0.4 * (m_FinalDestination - GetPosition()).SqrLength())))
)
{
ResetPathFinding();
/* Re-calculating is expensive when there's no path to target, and it results in mobs freezing very often as a result of always recalculating.
This is a workaround till we get better path recalculation. */
if (!m_NoPathToTarget)
{
ResetPathFinding();
}
}
}
@@ -161,12 +166,21 @@ bool cMonster::TickPathFinding(cChunk & a_Chunk)
StopMovingToPosition(); // Invalid chunks, probably world is loading or something, cancel movement.
return false;
}
m_NoPathToTarget = false;
m_NoMoreWayPoints = false;
m_PathFinderDestination = m_FinalDestination;
m_Path = new cPath(a_Chunk, GetPosition().Floor(), m_PathFinderDestination.Floor(), 20);
}
switch (m_Path->Step(a_Chunk))
{
case ePathFinderStatus::NEARBY_FOUND:
{
m_NoPathToTarget = true;
m_Path->AcceptNearbyPath();
break;
}
case ePathFinderStatus::PATH_NOT_FOUND:
{
StopMovingToPosition(); // Give up pathfinding to that destination.
@@ -179,15 +193,22 @@ bool cMonster::TickPathFinding(cChunk & a_Chunk)
}
case ePathFinderStatus::PATH_FOUND:
{
if (--m_GiveUpCounter == 0)
if (m_NoMoreWayPoints || (--m_GiveUpCounter == 0))
{
ResetPathFinding(); // Try to calculate a path again.
return false;
}
else if (!m_Path->IsLastPoint() && (m_Path->IsFirstPoint() || ReachedNextWaypoint())) // Have we arrived at the next cell, as denoted by m_NextWayPointPosition?
else if (!m_Path->IsLastPoint()) // Have we arrived at the next cell, as denoted by m_NextWayPointPosition?
{
m_NextWayPointPosition = Vector3d(0.5, 0, 0.5) + m_Path->GetNextPoint();
m_GiveUpCounter = 40; // Give up after 40 ticks (2 seconds) if failed to reach m_NextWayPointPosition.
if ((m_Path->IsFirstPoint() || ReachedNextWaypoint()))
{
m_NextWayPointPosition = Vector3d(0.5, 0, 0.5) + m_Path->GetNextPoint();
m_GiveUpCounter = 40; // Give up after 40 ticks (2 seconds) if failed to reach m_NextWayPointPosition.
}
}
else
{
m_NoMoreWayPoints = true;
}
return true;
}
@@ -269,21 +290,59 @@ bool cMonster::EnsureProperDestination(cChunk & a_Chunk)
{
return false;
}
int RelX = FloorC(m_FinalDestination.x) - Chunk->GetPosX() * cChunkDef::Width;
int RelZ = FloorC(m_FinalDestination.z) - Chunk->GetPosZ() * cChunkDef::Width;
// If destination in the air, go down to the lowest air block.
while (m_FinalDestination.y > 0)
// If destination in the air, first try to go 1 block north, or east, or west.
// This fixes the player leaning issue.
// If that failed, we instead go down to the lowest air block.
Chunk->GetBlockTypeMeta(RelX, FloorC(m_FinalDestination.y) - 1, RelZ, BlockType, BlockMeta);
if (!cBlockInfo::IsSolid(BlockType))
{
Chunk->GetBlockTypeMeta(RelX, FloorC(m_FinalDestination.y) - 1, RelZ, BlockType, BlockMeta);
if (cBlockInfo::IsSolid(BlockType))
bool InTheAir = true;
int x, z;
for (z = -1; z <= 1; ++z)
{
break;
for (x = -1; x <= 1; ++x)
{
if ((x==0) && (z==0))
{
continue;
}
Chunk = a_Chunk.GetNeighborChunk(FloorC(m_FinalDestination.x+x), FloorC(m_FinalDestination.z+z));
if ((Chunk == nullptr) || !Chunk->IsValid())
{
return false;
}
RelX = FloorC(m_FinalDestination.x+x) - Chunk->GetPosX() * cChunkDef::Width;
RelZ = FloorC(m_FinalDestination.z+z) - Chunk->GetPosZ() * cChunkDef::Width;
Chunk->GetBlockTypeMeta(RelX, FloorC(m_FinalDestination.y) - 1, RelZ, BlockType, BlockMeta);
if (cBlockInfo::IsSolid(BlockType))
{
m_FinalDestination.x += x;
m_FinalDestination.z += z;
InTheAir = false;
goto breakBothLoops;
}
}
}
m_FinalDestination.y -= 1;
}
breakBothLoops:
// Go down to the lowest air block.
if (InTheAir)
{
while (m_FinalDestination.y > 0)
{
Chunk->GetBlockTypeMeta(RelX, FloorC(m_FinalDestination.y) - 1, RelZ, BlockType, BlockMeta);
if (cBlockInfo::IsSolid(BlockType))
{
break;
}
m_FinalDestination.y -= 1;
}
}
}
// If destination in water, go up to the highest water block.
// If destination in solid, go up to first air block.
@@ -447,21 +506,29 @@ void cMonster::SetPitchAndYawFromDestination()
}
}
Vector3d BodyDistance = m_NextWayPointPosition - GetPosition();
double BodyRotation, BodyPitch;
BodyDistance.Normalize();
VectorToEuler(BodyDistance.x, BodyDistance.y, BodyDistance.z, BodyRotation, BodyPitch);
SetYaw(BodyRotation);
Vector3d Distance = FinalDestination - GetPosition();
{
double Rotation, Pitch;
double HeadRotation, HeadPitch;
Distance.Normalize();
VectorToEuler(Distance.x, Distance.y, Distance.z, Rotation, Pitch);
SetHeadYaw(Rotation);
SetPitch(-Pitch);
}
{
Vector3d BodyDistance = m_NextWayPointPosition - GetPosition();
double Rotation, Pitch;
BodyDistance.Normalize();
VectorToEuler(BodyDistance.x, BodyDistance.y, BodyDistance.z, Rotation, Pitch);
SetYaw(Rotation);
VectorToEuler(Distance.x, Distance.y, Distance.z, HeadRotation, HeadPitch);
if (abs(BodyRotation - HeadRotation) < 120)
{
SetHeadYaw(HeadRotation);
SetPitch(-HeadPitch);
}
else // We're not an owl. If it's more than 120, don't look behind and instead look at where you're walking.
{
SetHeadYaw(BodyRotation);
SetPitch(-BodyPitch);
}
}
}