Initial commit

1 files changed, 264 insertions, 0 deletions

diff --git a/Minecraft.World/PathfinderMob.cpp b/Minecraft.World/PathfinderMob.cpp
new file mode 100644
index 00000000..b72e064f
--- /dev/null
+++ b/Minecraft.World/PathfinderMob.cpp
@@ -0,0 +1,264 @@
+#include "stdafx.h"
+#include "net.minecraft.world.entity.h"
+#include "net.minecraft.world.level.h"
+#include "net.minecraft.world.level.pathfinder.h"
+#include "net.minecraft.world.phys.h"
+#include "SharedConstants.h"
+#include "PathfinderMob.h"
+
+
+
+PathfinderMob::PathfinderMob(Level *level) : Mob( level )
+{
+	path = NULL;
+	attackTarget = nullptr;
+	holdGround = false;
+	fleeTime = 0;
+}
+
+bool PathfinderMob::shouldHoldGround()
+{
+	return false;
+}
+
+PathfinderMob::~PathfinderMob()
+{
+	delete path;
+}
+
+void PathfinderMob::serverAiStep()
+{
+	if (fleeTime > 0) fleeTime--;
+	holdGround = shouldHoldGround();
+	float maxDist = 16;
+
+	if (attackTarget == NULL)
+	{
+		attackTarget = findAttackTarget();
+		if (attackTarget != NULL)
+		{
+			setPath(level->findPath(shared_from_this(), attackTarget, maxDist, true, false, false, true)); // 4J - changed to setPath from path =
+		}
+	}
+	else
+	{
+		if (attackTarget->isAlive())
+		{
+			float d = attackTarget->distanceTo(shared_from_this());
+			if (canSee(attackTarget))
+			{
+				checkHurtTarget(attackTarget, d);
+			}
+		}
+		else
+		{
+			attackTarget = nullptr;
+		}
+	}
+
+	/*
+	* if (holdGround) { xxa = 0; yya = 0; jumping = false; return; }
+	*/
+
+	// 4J - a few changes here so that we can call findRandomStrollLocation for a sub-set of things that it normally wouldn't be in the java game.
+	// This is so that we can have entities wander around a little, in order that we can measure how far they wander and then determine (if they wander too far) that
+	// they aren't enclosed. We don't want the extra network overhead of just having Everything wandering round all the time, so have put a management system in place
+	// that selects a subset of entities which have had their flag set through the considerForExtraWandering method so that these can keep doing random strolling.
+
+	if (!holdGround && (attackTarget != NULL && (path == NULL || random->nextInt(20) == 0)))
+	{
+		setPath(level->findPath(shared_from_this(), attackTarget, maxDist, true, false, false, true));// 4J - changed to setPath from path =
+	}
+	else if (!holdGround && ((path == NULL && (random->nextInt(180) == 0) || fleeTime > 0) || (random->nextInt(120) == 0 || fleeTime > 0)))
+	{
+		if(noActionTime < SharedConstants::TICKS_PER_SECOND * 5) 
+		{
+			findRandomStrollLocation();
+		}
+	}
+	else if (!holdGround && (path == NULL ) )
+	{
+		if( ( noActionTime >= SharedConstants::TICKS_PER_SECOND * 5 ) && isExtraWanderingEnabled() )
+		{
+			// This entity wouldn't normally be randomly strolling. However, if our management system says that it should do, then do. Don't
+			// bother waiting for random conditions to be met before picking a direction though as the point here is to see if it is possible to
+			// stroll out of a given area and so waiting around is just wasting time
+			findRandomStrollLocation(getWanderingQuadrant());
+		}
+	}
+
+	// Consider this for extra strolling if it is protected against despawning. We aren't interested in ones that aren't protected as the whole point of this
+	// extra wandering is to potentially transition from protected to not protected.
+	considerForExtraWandering( isDespawnProtected() );
+
+	int yFloor = Mth::floor(bb->y0 + 0.5f);
+
+	bool inWater = isInWater();
+	bool inLava = isInLava();
+	xRot = 0;
+	if (path == NULL || random->nextInt(100) == 0)
+	{
+		this->Mob::serverAiStep();
+		setPath(NULL);// 4J - changed to setPath from path =
+		return;
+	}
+
+	Vec3 *target = path->currentPos(shared_from_this());
+	double r = bbWidth * 2;
+	while (target != NULL && target->distanceToSqr(x, target->y, z) < r * r)
+	{
+		path->next();
+		if (path->isDone())
+		{
+			target = NULL;
+			setPath(NULL); // 4J - changed to setPath from path =
+		}
+		else target = path->currentPos(shared_from_this());
+	}
+
+	jumping = false;
+	if (target != NULL)
+	{
+		double xd = target->x - x;
+		double zd = target->z - z;
+		double yd = target->y - yFloor;
+		float yRotD = (float) (atan2(zd, xd) * 180 / PI) - 90;
+		float rotDiff = Mth::wrapDegrees(yRotD - yRot);
+		yya = runSpeed;
+		if (rotDiff > MAX_TURN)
+		{
+			rotDiff = MAX_TURN;
+		}
+		if (rotDiff < -MAX_TURN)
+		{
+			rotDiff = -MAX_TURN;
+		}
+		yRot += rotDiff;
+
+		if (holdGround)
+		{
+			if (attackTarget != NULL)
+			{
+				double xd2 = attackTarget->x - x;
+				double zd2 = attackTarget->z - z;
+
+				float oldyRot = yRot;
+				yRot = (float) (atan2(zd2, xd2) * 180 / PI) - 90;
+
+				rotDiff = ((oldyRot - yRot) + 90) * PI / 180;
+				xxa = -Mth::sin(rotDiff) * yya * 1.0f;
+				yya = Mth::cos(rotDiff) * yya * 1.0f;
+			}
+		}
+		if (yd > 0)
+		{
+			jumping = true;
+		}
+	}
+
+	if (attackTarget != NULL)
+	{
+		lookAt(attackTarget, 30, 30);
+	}
+
+	if (this->horizontalCollision && !isPathFinding()) jumping = true;
+	if (random->nextFloat() < 0.8f && (inWater || inLava)) jumping = true;
+}
+
+void PathfinderMob::findRandomStrollLocation(int quadrant/*=-1*/)	// 4J - added quadrant
+{
+	bool hasBest = false;
+	int xBest = -1;
+	int yBest = -1;
+	int zBest = -1;
+	float best = -99999;
+	for (int i = 0; i < 10; i++)
+	{
+		// 4J - added quadrant parameter to this method so that the caller can request that only stroll locations in one quadrant be found. If -1 is passed then
+		// behaviour is the same as the java game
+		int xt, zt;
+		int yt = Mth::floor(y + random->nextInt(7) - 3);
+		if( quadrant == -1 )
+		{
+			xt = Mth::floor(x + random->nextInt(13) - 6);
+			zt = Mth::floor(z + random->nextInt(13) - 6);
+		}
+		else
+		{
+			int sx = ( ( quadrant & 1 ) ? -1 : 1 );
+			int sz = ( ( quadrant & 2 ) ? -1 : 1 );
+			xt = Mth::floor(x + random->nextInt(7) * sx);
+			zt = Mth::floor(z + random->nextInt(7) * sz);
+		}
+		float value = getWalkTargetValue(xt, yt, zt);
+		if (value > best)
+		{
+			best = value;
+			xBest = xt;
+			yBest = yt;
+			zBest = zt;
+			hasBest = true;
+		}
+	}
+	if (hasBest)
+	{
+		setPath(level->findPath(shared_from_this(), xBest, yBest, zBest, 10, true, false, false, true)); // 4J - changed to setPath from path =
+	}
+}
+
+void PathfinderMob::checkHurtTarget(shared_ptr<Entity> target, float d)
+{
+}
+
+float PathfinderMob::getWalkTargetValue(int x, int y, int z)
+{
+	return 0;
+}
+
+shared_ptr<Entity> PathfinderMob::findAttackTarget()
+{
+	return shared_ptr<Entity>();
+}
+
+
+bool PathfinderMob::canSpawn()
+{
+	int xt = Mth::floor(x);
+	int yt = Mth::floor(bb->y0);
+	int zt = Mth::floor(z);
+	return this->Mob::canSpawn() && getWalkTargetValue(xt, yt, zt) >= 0;
+}
+
+bool PathfinderMob::isPathFinding()
+{
+	return path != NULL;
+}
+
+void PathfinderMob::setPath(Path *path)
+{
+	delete this->path;
+	this->path = path;
+}
+
+shared_ptr<Entity> PathfinderMob::getAttackTarget()
+{
+	return attackTarget;
+}
+
+void PathfinderMob::setAttackTarget(shared_ptr<Entity> attacker)
+{
+	attackTarget = attacker;
+}
+
+float PathfinderMob::getWalkingSpeedModifier()
+{
+	if (useNewAi()) return 1.0f;
+	float speed = Mob::getWalkingSpeedModifier();
+	if (fleeTime > 0) speed *= 2;
+	return speed;
+}
+
+bool PathfinderMob::couldWander()
+{
+	return (noActionTime < SharedConstants::TICKS_PER_SECOND * 5) || ( isExtraWanderingEnabled() );
+}
\ No newline at end of file