public override void knockBack(Vector2 direction, float magnitude, int damage, Entity attacker)
{
if (snakeState == SnakeWormState.KnockedBack)
{
return;
}
snakeState = SnakeWormState.KnockedBack;
enemy_life -= damage;
knockBackTime = 0;
direction.Normalize();
this.direction = (float)(Math.Atan2(direction.Y, direction.X));
velocity = direction * knockBackMagnitude;
}
public SnakeWorm(LevelState parentWorld, Vector2 position)
{
this.parentWorld = parentWorld;
this.position = position;
this.dimensions = new Vector2(24);
snakeState = SnakeWormState.Moving;
velocity = Vector2.Zero;
direction = (float)(Game1.rand.NextDouble() * Math.PI * 2);
dirModifier = 1.0f;
switchTimer = 0.0f;
switchDuration = averageSwitchDuration;
enemy_life = 16;
enemy_type = EnemyType.Alien;
prob_item_drop = 0.3;
number_drop_items = 4;
tailData = new TailPosition[tailPiecesCount, positionsCount];
tailMostRecent = 0;
for (int j = 0; j < tailPiecesCount; j++)
{
for (int i = 0; i < positionsCount; i++)
{
tailData[j, i] = new TailPosition(position, direction);
}
}
secondaryHitBoxes = new SecondaryHitBox[secondaryHitBoxCount];
for (int i = 0; i < secondaryHitBoxCount; i++)
{
secondaryHitBoxes[i] = new SecondaryHitBox(position, new Vector2(16));
}
testAnim = AnimationLib.getFrameAnimationSet("snakeA");
tailAnimA = AnimationLib.getFrameAnimationSet("snakeB");
tailAnimB = AnimationLib.getFrameAnimationSet("snakeC");
animation_time = 0;
}
public override void update(GameTime currentTime)
{
animation_time += currentTime.ElapsedGameTime.Milliseconds;
if (snakeState == SnakeWormState.Moving)
{
switchTimer += currentTime.ElapsedGameTime.Milliseconds;
if (switchTimer > switchDuration)
{
dirModifier *= -1;
switchTimer = 0;
switchDuration = averageSwitchDuration + (float)(1000f * Game1.rand.NextDouble());
}
direction += turnAmount * dirModifier;
velocity = new Vector2((float)(Math.Cos(direction) * wormSpeed), (float)(Math.Sin(direction) * wormSpeed));
if (enemy_life < 1)
{
snakeState = SnakeWormState.Dying;
parentWorld.pushCoin(this);
}
foreach (Entity en in parentWorld.EntityList)
{
if (en.Enemy_Type == EnemyType.Alien)
{
continue;
}
if (Vector2.Distance(en.CenterPoint, CenterPoint) < 500f)
{
if (hitTest(en))
{
en.knockBack(en.Position - position, 2.0f, 5);
}
}
}
}
else if (snakeState == SnakeWormState.KnockedBack)
{
knockBackTime += currentTime.ElapsedGameTime.Milliseconds;
//direction += turnAmount * 3;
if (knockBackTime > knockBackDuration)
{
snakeState = SnakeWormState.Moving;
}
}
else if (snakeState == SnakeWormState.Dying)
{
remove_from_list = true;
}
for (int i = 0; i < tailPiecesCount; i++)
{
if (i == tailPiecesCount - 1)
{
tailData[i, tailMostRecent] = new TailPosition(position, direction + (float)(Math.PI));
}
else
{
tailData[i, tailMostRecent] = tailData[(i - 1 + tailPiecesCount) % tailPiecesCount, (tailMostRecent + 1) % positionsCount];
}
}
for (int i = 0; i < tailPiecesCount - 1; i++)
{
Vector2 posDiff = tailData[i + 1, tailMostRecent].position - tailData[i, tailMostRecent].position;
tailData[i, tailMostRecent].rotation = (float)(Math.Atan2(posDiff.Y, posDiff.X));
}
tailMostRecent = (tailMostRecent + 1) % positionsCount;
for (int i = 0; i < secondaryHitBoxCount; i++)
{
secondaryHitBoxes[i].Position = tailData[(int)(i * ((tailPiecesCount - 1.0f) / secondaryHitBoxCount)), tailMostRecent].position;
}
Vector2 newPos = position + (this.velocity * currentTime.ElapsedGameTime.Milliseconds);
position = parentWorld.Map.reloactePosition(position, newPos, dimensions);
}