// Requirements:
// - ✔ Try to not move a lot vertically
// - ✔ If territorial: Stay close to the spawn point
// - ✔ If air habitat: Don't go above maxHeight blocks above surface
// - ✔ If land habitat: Don't walk into water, prefer surface
// - ~~If cave habitat: Prefer caves~~
// - ✔ If water habitat: Don't walk onto land
// - ✔ Try not to fall from very large heights. Try not to fall from any large heights if entity has FallDamage
// - ✔ Prefer preferredLightLevel
// - ✔ If land habitat: Must be above a block the entity can stand on
// - ✔ if failed searches is high, reduce wander range
public Vec3d loadNextWanderTarget()
{
EnumHabitat habitat = entity.Properties.Habitat;
bool canFallDamage = entity.Properties.FallDamage;
bool territorial = StayCloseToSpawn;
int tries = 9;
Vec4d bestTarget = null;
Vec4d curTarget = new Vec4d();
BlockPos tmpPos = new BlockPos();
if (FailedConsecutivePathfinds > 10)
{
WanderRangeMul = Math.Max(0.1f, WanderRangeMul * 0.9f);
}
else
{
WanderRangeMul = Math.Min(1, WanderRangeMul * 1.1f);
if (rand.NextDouble() < 0.05)
{
WanderRangeMul = Math.Min(1, WanderRangeMul * 1.5f);
}
}
float wRangeMul = WanderRangeMul;
double dx, dy, dz;
if (rand.NextDouble() < 0.05)
{
wRangeMul *= 3;
}
while (tries-- > 0)
{
dx = wanderRangeHorizontal.nextFloat() * (rand.Next(2) * 2 - 1) * wRangeMul;
dy = wanderRangeVertical.nextFloat() * (rand.Next(2) * 2 - 1) * wRangeMul;
dz = wanderRangeHorizontal.nextFloat() * (rand.Next(2) * 2 - 1) * wRangeMul;
curTarget.X = entity.ServerPos.X + dx;
curTarget.Y = entity.ServerPos.Y + dy;
curTarget.Z = entity.ServerPos.Z + dz;
curTarget.W = 1;
if (StayCloseToSpawn)
{
double distToEdge = curTarget.SquareDistanceTo(SpawnPosition) / (MaxDistanceToSpawn * MaxDistanceToSpawn);
// Prefer staying close to spawn
curTarget.W = 1 - distToEdge;
}
Block block;
switch (habitat)
{
case EnumHabitat.Air:
int rainMapY = world.BlockAccessor.GetRainMapHeightAt((int)curTarget.X, (int)curTarget.Z);
// Don't fly above max height
curTarget.Y = Math.Min(curTarget.Y, rainMapY + maxHeight);
// Cannot be in water
block = entity.World.BlockAccessor.GetBlock((int)curTarget.X, (int)curTarget.Y, (int)curTarget.Z);
if (block.IsLiquid())
{
curTarget.W = 0;
}
break;
case EnumHabitat.Land:
curTarget.Y = moveDownToFloor((int)curTarget.X, curTarget.Y, (int)curTarget.Z);
// No floor found
if (curTarget.Y < 0)
{
curTarget.W = 0;
}
else
{
// Does not like water
block = entity.World.BlockAccessor.GetBlock((int)curTarget.X, (int)curTarget.Y, (int)curTarget.Z);
if (block.IsLiquid())
{
curTarget.W /= 2;
}
// Lets make a straight line plot to see if we would fall off a cliff
bool stop = false;
bool willFall = false;
float angleHor = (float)Math.Atan2(dx, dz) + GameMath.PIHALF;
Vec3d target1BlockAhead = curTarget.XYZ.Ahead(1, 0, angleHor);
Vec3d startAhead = entity.ServerPos.XYZ.Ahead(1, 0, angleHor); // Otherwise they are forever stuck if they stand over the edge
int prevY = (int)startAhead.Y;
GameMath.BresenHamPlotLine2d((int)startAhead.X, (int)startAhead.Z, (int)target1BlockAhead.X, (int)target1BlockAhead.Z, (x, z) =>
{
if (stop)
{
return;
}
double nowY = moveDownToFloor(x, prevY, z);
// Not more than 4 blocks down
if (nowY < 0 || prevY - nowY > 4)
{
willFall = true;
stop = true;
}
// Not more than 2 blocks up
if (nowY - prevY > 2)
{
stop = true;
}
prevY = (int)nowY;
});
if (willFall)
{
curTarget.W = 0;
}
}
break;
case EnumHabitat.Sea:
block = entity.World.BlockAccessor.GetBlock((int)curTarget.X, (int)curTarget.Y, (int)curTarget.Z);
if (!block.IsLiquid())
{
curTarget.W = 0;
}
break;
}
if (curTarget.W > 0)
{
// Try to not hug the wall so much
for (int i = 0; i < BlockFacing.HORIZONTALS.Length; i++)
{
BlockFacing face = BlockFacing.HORIZONTALS[i];
block = entity.World.BlockAccessor.GetBlock((int)curTarget.X + face.Normali.X, (int)curTarget.Y, (int)curTarget.Z + face.Normali.Z);
if (block.SideSolid[face.Opposite.Index])
{
curTarget.W *= 0.5;
}
}
}
if (preferredLightLevel != null)
{
tmpPos.Set((int)curTarget.X, (int)curTarget.Y, (int)curTarget.Z);
int lightdiff = Math.Abs((int)preferredLightLevel - entity.World.BlockAccessor.GetLightLevel(tmpPos, EnumLightLevelType.MaxLight));
curTarget.W /= Math.Max(1, lightdiff);
}
if (bestTarget == null || curTarget.W > bestTarget.W)
{
bestTarget = new Vec4d(curTarget.X, curTarget.Y, curTarget.Z, curTarget.W);
}
}
if (bestTarget.W > 0)
{
//double bla = bestTarget.Y;
//bestTarget.Y += 1;
//dx = bestTarget.X - entity.ServerPos.X;
//dz = bestTarget.Z - entity.ServerPos.Z;
//Vec3d sadf = bestTarget.XYZ.Ahead(1, 0, (float)Math.Atan2(dx, dz) + GameMath.PIHALF);
/*(entity.Api as ICoreServerAPI).World.HighlightBlocks(world.AllOnlinePlayers[0], 10, new List<BlockPos>() {
* new BlockPos((int)bestTarget.X, (int)bestTarget.Y, (int)bestTarget.Z) }, new List<int>() { ColorUtil.ColorFromRgba(0, 255, 0, 80) }, EnumHighlightBlocksMode.Absolute, EnumHighlightShape.Arbitrary);
* (entity.Api as ICoreServerAPI).World.HighlightBlocks(world.AllOnlinePlayers[0], 11, new List<BlockPos>() {
* new BlockPos((int)sadf.X, (int)sadf.Y, (int)sadf.Z) }, new List<int>() { ColorUtil.ColorFromRgba(0, 255, 255, 180) }, EnumHighlightBlocksMode.Absolute, EnumHighlightShape.Arbitrary);*/
//bestTarget.Y = bla;
FailedConsecutivePathfinds = Math.Max(FailedConsecutivePathfinds - 3, 0);
return(bestTarget.XYZ);
}
FailedConsecutivePathfinds++;
return(null);
}