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///////////////////////////////////// CONSTRUCTOR \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
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//Pre: The game tiles, x and y position fo the enemy, width and height of the enemy, and the width and height of the screen
//Post: The enemy is created
//Desc: A constructor for the enemy
public Enemy(Tile[,] gameTiles, int xPos, int yPos, int enemyWidth, int enemyHeight, int screenWidth, int screenHeight)
{
//Sets the pathfinding and frame animation objects
pathFinding = new PathFinding(gameTiles);
frameAnimation = new FrameAnimation(rifle.GetTextures(AnimationState.Idle), IDLE_FRAME_DELAY);
//Sets the human to not moving
HumanMoving = false;
//Sets the position and bounds of the enemy
Position = new Vector2(xPos, yPos);
bounds = new Rectangle((int)Position.X, (int)Position.Y, enemyWidth, enemyHeight);
//Creates a new list of projectiles
Projectiles = new List <Projectile>();
//Sets the width and height of the screen
this.screenWidth = screenWidth;
this.screenHeight = screenHeight;
//Sets the health to full
Health = 100;
}
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/////////////////////////////////////// METHODS \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
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//Pre: The player, the game tiles, and whether the pathfinding needs to be checked
//Post: The enemy is updated
//Desc: An update method for the enemy
public void Update(Player player, Tile[,] gameTiles, bool pathCheck)
{
//Gets whether the player is currently in view
playerInView = IsPlayerInView(player, gameTiles);
//If the player is in view and the path needs to be checked for the current enemy at the current frame
if (playerInView && pathCheck)
{
//Clears the current path
currentPath.Clear();
//Calculates the row and column of the tile that the enemy and player are on
Vector2 enemyLocation = new Vector2((float)Math.Round(Position.X / Tile.TILE_X_SIZE), (float)Math.Round(Position.Y / Tile.TILE_Y_SIZE));
Vector2 playerLocation = player.Position + player.GetWallDisplacement();
playerLocation = new Vector2(playerLocation.X / Tile.TILE_X_SIZE, playerLocation.Y / Tile.TILE_Y_SIZE);
//Creates a new pathfinding instance with the gametiles and finds the path
pathFinding = new PathFinding(gameTiles);
pathFinding.FindPath(new Node((int)enemyLocation.X, (int)enemyLocation.Y), new Node((int)playerLocation.X, (int)playerLocation.Y));
//Temporary list of nodes which is used to get the enemy's path
List <Node> tempList = new List <Node>();
//Gets the solution from the path finding
tempList = pathFinding.GetSolution();
//If the solution has more then two tile
if (tempList.Count > 2)
{
//Removes the first and last tile in the list
tempList.RemoveAt(tempList.Count - 1);
tempList.RemoveAt(0);
//Loop for every tile in the list
for (int i = tempList.Count - 1; i >= 0; i--)
{
//Adds the tile x and y values to the enemy's path
currentPath.Add(new Vector2(tempList[i].Row * Tile.TILE_X_SIZE, tempList[i].Column * Tile.TILE_Y_SIZE));
}
}
//If the solution doesn't have more then two tiles, the current path is cleared
else
{
currentPath.Clear();
}
}
//If the player is in view
if (playerInView)
{
//The rotation angle towards the player is calculated
CalcRotation(player.Position.X, player.Position.Y, 0, 0);
//If the enemy is able to shoot
if (shootDelayCount >= EnemyRifle.SHOT_DELAY && rifle.currentAmmo > 0)
{
//If the enemy is currently not shooting
if (frameAnimation.AnimState == AnimationState.Shoot && frameAnimation.ShootingFrameDone || frameAnimation.AnimState != AnimationState.Shoot)
{
//The enemy is set to shoot and it's textures are changed
frameAnimation.AnimState = AnimationState.Shoot;
frameAnimation.ResetFrame(rifle.GetTextures(frameAnimation.AnimState), SHOOT_FRAME_DELAY);
//The shooting delay is reset
shootDelayCount = 0;
}
}
}
//If the player is not in view
else
{
//If the player currently has a path its following
if (currentPath.Count > 0)
{
//Calculates the rotation angle towards its next point in the path
CalcRotation(currentPath[0].X, currentPath[0].Y, 0, 0);
}
}
//If the enemy needs to reload
if (rifle.currentAmmo == 0 && frameAnimation.AnimState != AnimationState.Reload)
{
//The enemy is set to reload
frameAnimation.AnimState = AnimationState.Reload;
frameAnimation.ResetFrame(rifle.GetTextures(frameAnimation.AnimState), RELOAD_FRAME_DELAY);
}
//If the enemy has a path it should follow
if (currentPath.Count > 0)
{
//The enemy is set to move to the next point in its path
MoveEnemy();
}
//If the enemy does not have a path
else
{
//The enemy is set to being idle if it's not doing anything else at the moment such as reloading or shooting
if (HumanMoving && frameAnimation.AnimState != AnimationState.Reload && frameAnimation.AnimState != AnimationState.Shoot)
{
SetHumanIdle();
}
}
//The frame animation for the enemy is updated
frameAnimation.Update();
//If the enemy is done shooting
if (frameAnimation.AnimState == AnimationState.Shoot && frameAnimation.CurrFrame == SHOOT_FRAME_AMOUNT &&
frameAnimation.Count == SHOOT_FRAME_DELAY - 1)
{
//If the enemy is currently moving
if (HumanMoving)
{
//The frame animation for the enemy is set to moving
frameAnimation.AnimState = AnimationState.Move;
frameAnimation.ResetFrame(rifle.GetTextures(frameAnimation.AnimState), MOVE_FRAME_DELAY);
}
//If the enemy is currently idle
else
{
//The frame animation for the enemy is set to idle
frameAnimation.AnimState = AnimationState.Idle;
frameAnimation.ResetFrame(rifle.GetTextures(frameAnimation.AnimState), IDLE_FRAME_DELAY);
}
}
//If the frame animation for the shooting is done and a bullet needs to be created
if (frameAnimation.ShootingFrameDone)
{
//The direction for the bullet is calculated
Vector2 direction = new Vector2((float)Math.Cos(rotationAngle), (float)Math.Sin(rotationAngle));
direction.Normalize();
//The point where the bullet spawns and the point at which the enemy rotates is calculated
Vector2 pointToRotate = new Vector2(Position.X + EnemyRifle.BULLET_DISPLACEMENT_X, Position.Y + EnemyRifle.BULLET_DISPLACEMENT_Y);
Vector2 centerPoint = new Vector2(Position.X + rotationOrigin.X, Position.Y + rotationOrigin.Y);
//The new x and y for where the bullet should spawn is calculated
int x = (int)(direction.X * (pointToRotate.X - centerPoint.X) - direction.Y * (pointToRotate.Y - centerPoint.Y) + centerPoint.X);
int y = (int)(direction.Y * (pointToRotate.X - centerPoint.X) + direction.X * (pointToRotate.Y - centerPoint.Y) + centerPoint.Y);
//The projectile is created with the new spawn point and the ammo is decreased
Projectiles.Add(new Projectile(new Vector2(x, y), ProjectileType.Bullet, EnemyRifle.BULLET_DAMAGE, EnemyRifle.BULLET_SPEED, rotationAngle, screenWidth, screenHeight));
rifle.currentAmmo--;
//The frame animation for the shooting is set to not done so the bullet stop being created
frameAnimation.ShootingFrameDone = false;
}
//If the frame animation for the reloading is done
else if (frameAnimation.ReloadFrameDone)
{
//The ammo for the rifle is reset and the frame animation for the reloading is set to not done
rifle.currentAmmo = EnemyRifle.AMMO_CAPACITY;
frameAnimation.ReloadFrameDone = false;
//If the enemy is moving
if (HumanMoving)
{
//The frame animation for the enemy is set to moving
frameAnimation.AnimState = AnimationState.Move;
frameAnimation.ResetFrame(rifle.GetTextures(frameAnimation.AnimState), MOVE_FRAME_DELAY);
}
//If the enemy is idle
else
{
//The frame animation for the enemy is set to idle
frameAnimation.AnimState = AnimationState.Idle;
frameAnimation.ResetFrame(rifle.GetTextures(frameAnimation.AnimState), IDLE_FRAME_DELAY);
}
}
//For each projecitle in the list of projectiles
foreach (Projectile projectile in Projectiles)
{
//The owner of the bullet is set to the current enemy
projectile.BulletOwner = this;
}
//The shooting delay count is incremented
shootDelayCount++;
}
