aggression

[blobs.git] / src / creature / goal.cpp

diff --git a/src/creature/goal.cpp b/src/creature/goal.cpp
index abac4679dcbb93f822f7e54339e9c930071c5d5b..41f91f37e0ec63fa0b6f9b0cb432a3de48346cad 100644 (file)
--- a/src/creature/goal.cpp
+++ b/src/creature/goal.cpp
@@ -1,3 +1,4 @@
+#include "AttackGoal.hpp"
 #include "BlobBackgroundTask.hpp"
 #include "Goal.hpp"
 #include "IdleGoal.hpp"
@@ -22,6 +23,78 @@
 namespace blobs {
 namespace creature {
 
+AttackGoal::AttackGoal(Creature &self, Creature &target)
+: Goal(self)
+, target(target)
+, damage_target(0.25)
+, damage_dealt(0.0)
+, cooldown(0.0) {
+}
+
+AttackGoal::~AttackGoal() {
+}
+
+std::string AttackGoal::Describe() const {
+       return "attack " + target.Name();
+}
+
+void AttackGoal::Tick(double dt) {
+       cooldown -= dt;
+}
+
+void AttackGoal::Action() {
+       if (target.Dead() || !GetCreature().PerceptionTest(target.GetSituation().Position())) {
+               SetComplete();
+               return;
+       }
+       const glm::dvec3 diff(GetCreature().GetSituation().Position() - target.GetSituation().Position());
+       const double hit_range = GetCreature().Size() * 0.5 * GetCreature().DexertyFactor();
+       const double hit_dist = hit_range + (0.5 * GetCreature().Size()) + 0.5 * (target.Size());
+       if (GetCreature().GetStats().Damage().Critical()) {
+               // flee
+               GetCreature().GetSteering().Pass(diff * 5.0);
+               GetCreature().GetSteering().DontSeparate();
+               GetCreature().GetSteering().Haste(1.0);
+       } else if (glm::length2(diff) > hit_dist * hit_dist) {
+               // full throttle chase
+               GetCreature().GetSteering().Pass(target.GetSituation().Position());
+               GetCreature().GetSteering().DontSeparate();
+               GetCreature().GetSteering().Haste(1.0);
+       } else {
+               // attack
+               GetCreature().GetSteering().Halt();
+               GetCreature().GetSteering().DontSeparate();
+               GetCreature().GetSteering().Haste(1.0);
+               if (cooldown <= 0.0) {
+                       constexpr double impulse = 0.05;
+                       const double force = GetCreature().Strength();
+                       const double damage =
+                               force * impulse
+                               * (GetCreature().GetComposition().TotalDensity() / target.GetComposition().TotalDensity())
+                               * (GetCreature().Mass() / target.Mass())
+                               / target.Mass();
+                       GetCreature().DoWork(force * impulse * glm::length(diff));
+                       target.Hurt(damage);
+                       target.GetSituation().Accelerate(glm::normalize(diff) * force * -impulse);
+                       damage_dealt += damage;
+                       if (damage_dealt >= damage_target || target.Dead()) {
+                               SetComplete();
+                               if (target.Dead()) {
+                                       GetCreature().GetSimulation().Log() << GetCreature().Name()
+                                               << " killed " << target.Name() << std::endl;
+                               }
+                       }
+                       cooldown = 1.0 + (4.0 * (1.0 - GetCreature().DexertyFactor()));
+               }
+       }
+}
+
+void AttackGoal::OnBackground() {
+       // abort if something more important comes up
+       SetComplete();
+}
+
+
 BlobBackgroundTask::BlobBackgroundTask(Creature &c)
 : Goal(c)
 , breathing(false)