public bool CanSee(NPC npc, Obstacle obs)
{
Vector2 viewDir = npc.visions[numVisions/2].viewDirection;
double angle1 = 2 * Math.PI + Math.Atan2(-1*(double)viewDir.Y, (double)viewDir.X);
Vector2 obsDir = obs.position - npc.position;
double angle2 = 2 * Math.PI + Math.Atan2(-1*(double)obsDir.Y, (double) obsDir.X);
double diff = angle1 - angle2;
if (Math.Abs(diff) > Math.PI)
diff = Math.Abs(diff) - 2 * Math.PI;
if (Math.Abs(diff) < viewWidth + Math.PI / 2)
{
if (distance2((Entity)npc, (Entity)obs) < viewDistance * viewDistance + 30000)
return true;
}
return false;
}
public void CreateNPC(NPCType tag, Vector2 position)
{
NPC npc = new NPC();
npc.tag = tag;
npc.position = position;
npc.stateTime = 0;
switch (tag)
{
case NPCType.PoliceA:
//lack of break here is intentional! We want both police managed the same way here
case NPCType.PoliceB:
npc.sprite = policeTexture;
npc.rectangleBounds = new Point(SPRITE_SIZE, SPRITE_SIZE);
for (int i = 0; i < numVisions; i++)
{
float angle = (i - numVisions/2) * viewWidth;
npc.visions.Add(new Vision(npc.worldRectangle, viewDistance, viewWidth / 2, new Vector2((float)Math.Cos(angle), (float)Math.Sin(angle)), Color.Red));
}
npc.vision = new Vision(npc.worldRectangle, viewDistance, maxWidth / 2, new Vector2(1, 0), Color.Red);
npc.rotateSpeed = .001;
npc.moveSpeed = 0.1f;
npc.state = NPCState.PatrolLeft;
break;
}
this.AddNPC(npc);
}
public void AddNPC(NPC npc)
{
npcs.Add(npc);
tileController.Add(npc);
}
public bool UpdateNPC(NPC npc, Player player, List<Obstacle> visibleObstacles, GameTime gameTime)
{
if (npc.CanSeePlayer(player, visibleObstacles)) return true;
switch (npc.tag)
{
case NPCType.PoliceA:
{
npc.MoveForward(gameTime, 1.0f);
if(collisionController.IllegalMove(npc)) npc.MoveBackward(gameTime, 1.0f);
npc.RotateRight(gameTime, 1.0f);
}
break;
case NPCType.PoliceB:
npc.stateTime += gameTime.ElapsedGameTime.Milliseconds;
double angleToPlayer = Math.Atan2(-1*((double)(player.worldRectangle.Y + (player.worldRectangle.Height / 2)) - (npc.worldRectangle.Y + (npc.worldRectangle.Height / 2))),
((double)(player.worldRectangle.X + (player.worldRectangle.Width / 2)) - (npc.worldRectangle.X + (npc.worldRectangle.Width / 2))));
double facingAngle = Math.Atan2(-1*npc.vision.viewDirection.Y, npc.vision.viewDirection.X);
double turnToAngle = facingAngle - angleToPlayer;
while (turnToAngle < -1 * MathHelper.Pi) turnToAngle += MathHelper.TwoPi;
while (turnToAngle > MathHelper.Pi) turnToAngle -= MathHelper.TwoPi;
switch (npc.state)
{
case NPCState.PatrolRight:
npc.MoveForward(gameTime, 1.0f);
if (collisionController.IllegalMove(npc))
{
npc.MoveBackward(gameTime, 1.0f);
npc.state = NPCState.PatrolRightBackwards;
npc.stateTime = 0;
}
if (Math.Abs(turnToAngle) < npc.vision.viewAngle && visibleObstacles.Count == 0 && player.isVisible && npc.vision.maxViewDistance * 1.5 >
Math.Abs(((player.worldRectangle.Y + (player.worldRectangle.Height / 2)) - (npc.worldRectangle.Y + (npc.worldRectangle.Height / 2)))) +
Math.Abs((player.worldRectangle.X + (player.worldRectangle.Width / 2)) - (npc.worldRectangle.X + (npc.worldRectangle.Width / 2))))
{
npc.state = NPCState.Chase;
npc.stateTime = 0;
}
else if (player.isVisible && npc.vision.maxViewDistance / 2.5 > Math.Abs(((player.worldRectangle.Y + (player.worldRectangle.Height / 2)) - (npc.worldRectangle.Y + (npc.worldRectangle.Height / 2)))) +
Math.Abs((player.worldRectangle.X + (player.worldRectangle.Width / 2)) - (npc.worldRectangle.X + (npc.worldRectangle.Width / 2))))
{
npc.state = NPCState.Investigate;
npc.stateTime = 0;
}
else if (npc.stateTime > 3000)
{
npc.state = NPCState.PatrolLeft;
npc.stateTime = 0;
}
else npc.RotateRight(gameTime, 1.0f);
break;
case NPCState.PatrolLeft:
npc.MoveForward(gameTime, 1.0f);
if (collisionController.IllegalMove(npc))
{
npc.MoveBackward(gameTime, 1.0f);
npc.state = NPCState.PatrolLeftBackwards;
npc.stateTime = 0;
}
if (Math.Abs(turnToAngle) < npc.vision.viewAngle && visibleObstacles.Count == 0 && player.isVisible && npc.vision.maxViewDistance * 1.5 >
Math.Abs(((player.worldRectangle.Y + (player.worldRectangle.Height / 2)) - (npc.worldRectangle.Y + (npc.worldRectangle.Height / 2)))) +
Math.Abs((player.worldRectangle.X + (player.worldRectangle.Width / 2)) - (npc.worldRectangle.X + (npc.worldRectangle.Width / 2))))
{
npc.state = NPCState.Chase;
npc.stateTime = 0;
}
else if (player.isVisible && npc.vision.maxViewDistance / 2.5 > Math.Abs(((player.worldRectangle.Y + (player.worldRectangle.Height / 2)) - (npc.worldRectangle.Y + (npc.worldRectangle.Height / 2)))) +
Math.Abs((player.worldRectangle.X + (player.worldRectangle.Width / 2)) - (npc.worldRectangle.X + (npc.worldRectangle.Width / 2))))
{
npc.state = NPCState.Investigate;
npc.stateTime = 0;
}
else if (npc.stateTime > 3000)
{
npc.state = NPCState.PatrolRight;
npc.stateTime = 0;
}
else npc.RotateLeft(gameTime, 1.0f);
break;
case NPCState.PatrolLeftBackwards:
npc.MoveBackward(gameTime, 1.0f);
if (collisionController.IllegalMove(npc))
{
npc.MoveForward(gameTime, 1.0f);
npc.state = NPCState.PatrolLeft;
npc.stateTime = 0;
}
if (Math.Abs(turnToAngle) < npc.vision.viewAngle && visibleObstacles.Count == 0 && player.isVisible && npc.vision.maxViewDistance * 1.5 >
Math.Abs(((player.worldRectangle.Y + (player.worldRectangle.Height / 2)) - (npc.worldRectangle.Y + (npc.worldRectangle.Height / 2)))) +
Math.Abs((player.worldRectangle.X + (player.worldRectangle.Width / 2)) - (npc.worldRectangle.X + (npc.worldRectangle.Width / 2))))
{
npc.state = NPCState.Chase;
npc.stateTime = 0;
}
else if (player.isVisible && npc.vision.maxViewDistance / 2.5 > Math.Abs(((player.worldRectangle.Y + (player.worldRectangle.Height / 2)) - (npc.worldRectangle.Y + (npc.worldRectangle.Height / 2)))) +
Math.Abs((player.worldRectangle.X + (player.worldRectangle.Width / 2)) - (npc.worldRectangle.X + (npc.worldRectangle.Width / 2))))
{
npc.state = NPCState.Investigate;
npc.stateTime = 0;
}
else if (npc.stateTime > 250)
{
npc.state = NPCState.PatrolLeft;
npc.stateTime = 0;
}
else npc.RotateLeft(gameTime, 2.5f);
break;
case NPCState.PatrolRightBackwards:
npc.MoveBackward(gameTime, 1.0f);
if (collisionController.IllegalMove(npc))
{
npc.MoveForward(gameTime, 1.0f);
npc.state = NPCState.PatrolRight;
npc.stateTime = 0;
}
if (Math.Abs(turnToAngle) < npc.vision.viewAngle && visibleObstacles.Count == 0 && player.isVisible && npc.vision.maxViewDistance * 1.5 >
Math.Abs(((player.worldRectangle.Y + (player.worldRectangle.Height / 2)) - (npc.worldRectangle.Y + (npc.worldRectangle.Height / 2)))) +
Math.Abs((player.worldRectangle.X + (player.worldRectangle.Width / 2)) - (npc.worldRectangle.X + (npc.worldRectangle.Width / 2))))
{
npc.state = NPCState.Chase;
npc.stateTime = 0;
}
else if (player.isVisible && npc.vision.maxViewDistance / 2.5 > Math.Abs(((player.worldRectangle.Y + (player.worldRectangle.Height / 2)) - (npc.worldRectangle.Y + (npc.worldRectangle.Height / 2)))) +
Math.Abs((player.worldRectangle.X + (player.worldRectangle.Width / 2)) - (npc.worldRectangle.X + (npc.worldRectangle.Width / 2))))
{
npc.state = NPCState.Investigate;
npc.stateTime = 0;
}
else if (npc.stateTime > 250)
{
npc.state = NPCState.PatrolRight;
npc.stateTime = 0;
}
else npc.RotateRight(gameTime, 2.5f);
break;
case NPCState.Chase:
if (!player.isVisible || npc.vision.maxViewDistance*2 < Math.Abs(((player.worldRectangle.Y + (player.worldRectangle.Height / 2)) - (npc.worldRectangle.Y + (npc.worldRectangle.Height / 2)))) +
Math.Abs((player.worldRectangle.X + (player.worldRectangle.Width / 2)) - (npc.worldRectangle.X + (npc.worldRectangle.Width / 2))))
{
npc.state = NPCState.PatrolLeft; //Randomize
npc.stateTime = 0;
break;
}
if (Math.Abs(turnToAngle) > .05)
{
if (turnToAngle > 0) npc.RotateLeft(gameTime, 2.0f);
else if (turnToAngle < 0) npc.RotateRight(gameTime, 2.0f);
}
npc.MoveForward(gameTime, 2.0f);
if (collisionController.IllegalMove(npc))
{
npc.MoveBackward(gameTime, 2.0f);
npc.MoveRight(gameTime, 2.0f);
npc.state = NPCState.PatrolLeft; //Randomize
npc.stateTime = 0;
//if (turnToAngle > 0)
//{
// npc.MoveUp(gameTime, 2.0f);
// if (collisionController.IllegalMove(npc))
// {
// npc.MoveDown(gameTime, 2.0f);
// if (Math.Abs(turnToAngle) < MathHelper.PiOver2)
// {
// npc.MoveRight(gameTime, 2.0f);
// if (collisionController.IllegalMove(npc))
// {
// npc.MoveLeft(gameTime, 2.0f);
// npc.state = NPCState.PatrolLeft; //Randomize
// npc.stateTime = 0;
// }
// }
// }
//}
//else if (turnToAngle < 0)
//{
// npc.MoveDown(gameTime, 2.0f);
// if (collisionController.IllegalMove(npc))
// {
// npc.MoveUp(gameTime, 2.0f);
// if (Math.Abs(turnToAngle) < MathHelper.PiOver2)
// {
// npc.MoveLeft(gameTime, 2.0f);
// if (collisionController.IllegalMove(npc))
// {
// npc.MoveRight(gameTime, 2.0f);
// npc.state = NPCState.PatrolLeft; //Randomize
// npc.stateTime = 0;
// }
// }
// }
//}
}
break;
case NPCState.Investigate:
if (!player.isVisible || npc.vision.maxViewDistance / 2 < Math.Abs(((player.worldRectangle.Y + (player.worldRectangle.Height / 2)) - (npc.worldRectangle.Y + (npc.worldRectangle.Height / 2)))) +
Math.Abs((player.worldRectangle.X + (player.worldRectangle.Width / 2)) - (npc.worldRectangle.X + (npc.worldRectangle.Width / 2))))
{
npc.state = NPCState.PatrolLeft; //Randomize
npc.stateTime = 0;
}
else if (Math.Abs(turnToAngle) < npc.vision.viewAngle / 2 && visibleObstacles.Count == 0 && player.isVisible)
{
npc.state = NPCState.Chase;
npc.stateTime = 0;
}
else if (turnToAngle > 0) npc.RotateLeft(gameTime, 3.0f);
else if (turnToAngle < 0) npc.RotateRight(gameTime, 3.0f);
break;
}
break;
}
return false;
}
public void RemoveNPC(NPC npc)
{
npcs.Remove(npc);
tileController.Remove(npc);
}
public List<Obstacle> GetVisibleObstacles(NPC npc, List<Obstacle> obstacles)
{
List<Obstacle> visibleObstacles = new List<Obstacle>();
foreach (Obstacle obs in obstacles)
{
if(!obs.canSeeThrough && CanSee(npc, obs))
visibleObstacles.Add(obs);
}
return visibleObstacles;
}
public override void Initialize()
{
Type = "TitleScreen";
oldState = Keyboard.GetState();
player = new Player();
police1 = new NPC();
police2 = new NPC();
player.position = new Vector2(200, HideOutGame.SCREEN_HEIGHT - 75);
police1.position = new Vector2(50, HideOutGame.SCREEN_HEIGHT - 75);
police2.position = new Vector2(100, HideOutGame.SCREEN_HEIGHT - 75);
police1.rectangleBounds = new Point(NPCController.SPRITE_SIZE, NPCController.SPRITE_SIZE);
police2.rectangleBounds = new Point(NPCController.SPRITE_SIZE, NPCController.SPRITE_SIZE);
player.rectangleBounds = new Point(PlayerController.SPRITE_SIZE, PlayerController.SPRITE_SIZE);
}