From 4b4125e234cb727c70822e0a1fce0688c357741e Mon Sep 17 00:00:00 2001
From: Kelly Rauchenberger <fefferburbia@gmail.com>
Date: Thu, 19 Mar 2015 16:15:47 -0400
Subject: Implemented a simple AI

---
 src/components/ai.cpp | 142 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 src/components/ai.cpp

(limited to 'src/components/ai.cpp')

diff --git a/src/components/ai.cpp b/src/components/ai.cpp
new file mode 100644
index 0000000..9f8c764
--- /dev/null
+++ b/src/components/ai.cpp
@@ -0,0 +1,142 @@
+#include "ai.h"
+#include <cstdlib>
+#include "entity.h"
+
+void AIActionContainer::addAction(std::shared_ptr<AIAction> action)
+{
+  actions.push_back(action);
+}
+
+void AIActionContainer::start(Game& game, Entity& entity)
+{
+  currentAction = begin(actions);
+  
+  if (currentAction != end(actions))
+  {
+    (*currentAction)->start(game, entity);
+  }
+}
+
+void AIActionContainer::perform(Game& game, Entity& entity, double dt)
+{
+  if (!isDone())
+  {
+    (*currentAction)->perform(game, entity, dt);
+  
+    if ((*currentAction)->isDone())
+    {
+      currentAction++;
+      
+      if (!isDone())
+      {
+        (*currentAction)->start(game, entity);
+      }
+    }
+  }
+}
+
+bool AIActionContainer::isDone() const
+{
+  return currentAction == end(actions);
+}
+
+AI::AI(int chance)
+{
+  this->chance = chance;
+}
+
+int AI::getChance() const
+{
+  return chance;
+}
+
+AI& AIComponent::emplaceAI(int chance)
+{
+  maxChance += chance;
+  ais.emplace_back(chance);
+  
+  return ais.back();
+}
+
+void AIComponent::tick(Game& game, Entity& entity, double dt)
+{
+  if (currentAI == nullptr)
+  {
+    int toChoose = rand() % maxChance;
+    for (auto& ai : ais)
+    {
+      if (toChoose < ai.getChance())
+      {
+        currentAI = &ai;
+        break;
+      } else {
+        toChoose -= ai.getChance();
+      }
+    }
+    
+    if (currentAI != nullptr)
+    {
+      currentAI->start(game, entity);
+    }
+  }
+  
+  if (currentAI != nullptr)
+  {
+    currentAI->perform(game, entity, dt);
+  
+    if (currentAI->isDone())
+    {
+      currentAI = nullptr;
+    }
+  }
+}
+
+MoveAIAction::MoveAIAction(Direction dir, int len, int speed)
+{
+  this->dir = dir;
+  this->len = len;
+  this->speed = speed;
+}
+
+void MoveAIAction::start(Game& game, Entity& entity)
+{
+  remaining = len;
+}
+
+void MoveAIAction::perform(Game&, Entity& entity, double dt)
+{
+  double dist = dt * speed;
+  remaining -= dist;
+  
+  switch (dir)
+  {
+    case Direction::Left:
+    {
+      entity.position.first -= dist;
+      break;
+    }
+    
+    case Direction::Right:
+    {
+      entity.position.first += dist;
+      break;
+    }
+    
+    case Direction::Up:
+    {
+      entity.position.second -= dist;
+      break;
+    }
+    
+    case Direction::Down:
+    {
+      entity.position.second += dist;
+      break;
+    }
+  }
+}
+
+bool MoveAIAction::isDone() const
+{
+  return remaining <= 0.0;
+}
-- 
cgit 1.4.1