first commit

Minecraft.World/FollowParentGoal.cpp

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+#include "stdafx.h"
+#include "net.minecraft.world.entity.animal.h"
+#include "net.minecraft.world.entity.ai.navigation.h"
+#include "net.minecraft.world.level.h"
+#include "net.minecraft.world.phys.h"
+#include "BasicTypeContainers.h"
+#include "FollowParentGoal.h"
+
+FollowParentGoal::FollowParentGoal(Animal *animal, float speed)
+{
+	timeToRecalcPath = 0;
+
+	this->animal = animal;
+	this->speed = speed;
+}
+
+bool FollowParentGoal::canUse()
+{
+	if (animal->getAge() >= 0) return false;
+
+	vector<shared_ptr<Entity> > *parents = animal->level->getEntitiesOfClass(typeid(*animal), animal->bb->grow(8, 4, 8));
+
+	shared_ptr<Animal> closest = nullptr;
+	double closestDistSqr = Double::MAX_VALUE;
+	for(AUTO_VAR(it, parents->begin()); it != parents->end(); ++it)
+	{
+		shared_ptr<Animal> parent = dynamic_pointer_cast<Animal>(*it);
+		if (parent->getAge() < 0) continue;
+		double distSqr = animal->distanceToSqr(parent);
+		if (distSqr > closestDistSqr) continue;
+		closestDistSqr = distSqr;
+		closest = parent;
+	}
+	delete parents;
+
+	if (closest == NULL) return false;
+	if (closestDistSqr < 3 * 3) return false;
+	parent = weak_ptr<Animal>(closest);
+	return true;
+}
+
+bool FollowParentGoal::canContinueToUse()
+{
+	if (parent.lock() == NULL || !parent.lock()->isAlive()) return false;
+	double distSqr = animal->distanceToSqr(parent.lock());
+	if (distSqr < 3 * 3 || distSqr > 16 * 16) return false;
+	return true;
+}
+
+void FollowParentGoal::start()
+{
+	timeToRecalcPath = 0;
+}
+
+void FollowParentGoal::stop()
+{
+	parent = weak_ptr<Animal>();
+}
+
+void FollowParentGoal::tick()
+{
+	if (--timeToRecalcPath > 0) return;
+	timeToRecalcPath = 10;
+	animal->getNavigation()->moveTo(parent.lock(), speed);
+}