// reset this bullet's properties
public void Init()
{
// if needed, generate pixel-perfect data
if (OpaqueData == null)
{
OpaqueData = PixelPerfectHelper.GetOpaqueData(this);
}
// assume this bullet didn't originate from a player
Shooter = null;
}
// actually draw the HUD
public void Draw(SpriteBatch batch, Player player)
{
// top, left of the three health lights
Vector2 locHealthHUD = player.HudPosition;
// top, left of the three shield lights
Vector2 locShieldHUD = player.HudPosition;
locShieldHUD.X += 3 * 32;
// top, left of the score text and "press start" prompt
Vector2 locPressStart = player.HudPosition;
locPressStart.X += 16;
locPressStart.Y += 32;
if (FlashState && !player.IsActive)
{
// alternate between score and prompt,
// as long as player's game is over
batch.Draw(Game1.Texture, locPressStart,
m_RectPressStart, Color.White);
}
else
{
// if player is active, draw their score every time
player.NumberSprite.Draw(batch, locPressStart);
}
// render the health and shield lights
for (int i = 0; i < 3; i++)
{
// render the shield lights
if (player.Shield > i && player.IsActive)
{
// active! draw green light
batch.Draw(Game1.Texture, locShieldHUD,
m_RectShield, Color.PaleGreen);
}
else
{
// inactive, draw dim light
batch.Draw(Game1.Texture, locShieldHUD,
m_RectShield, Color.LightSlateGray);
}
// render the health lights
if (player.Health > i && player.IsActive)
{
// active! draw red light
batch.Draw(Game1.Texture, locHealthHUD,
m_RectHealth, Color.LightCoral);
}
else
{
// inactive, draw dim light
batch.Draw(Game1.Texture, locHealthHUD,
m_RectHealth, Color.LightSlateGray);
}
// move to the next light's location
locShieldHUD.X += 32;
locHealthHUD.X += 32;
}
}
// see if a player was hit by any enemy bullets
protected static void CheckForHitPlayer(Player player)
{
// is this player active?
if (player.IsActive)
{
// for each bullet
for (int iBullet = 0; iBullet < m_Bullets.Length; iBullet++)
{
// is this bullet active and did it originate from an enemy?
if (m_Bullets[iBullet].IsActive &&
!m_Bullets[iBullet].MoveUp)
{
// is the bullet touching the player?
if (PixelPerfectHelper.DetectCollision(
player, m_Bullets[iBullet]))
{
// register the hit with the player
player.TakeHit();
// if the player was destroyed by the hit,
// display a splat icon at their current
// location
if (!player.IsActive)
{
AddSplat(player);
}
// return this bullet to the pool of available
// bullets
m_Bullets[iBullet].IsActive = false;
}
}
}
// check for a collision between player and enemy aircraft
for (int iEnemy = 0; iEnemy < m_Enemies.Length; iEnemy++)
{
// is this enemy active?
if (m_Enemies[iEnemy].IsActive)
{
// is this enemy touching the player?
if (PixelPerfectHelper.DetectCollision(
player, m_Enemies[iEnemy]))
{
// register the hit with the player
player.TakeHit();
// add a new splat icon for the enemy plane
AddSplat(m_Enemies[iEnemy]);
// if the player was destroyed, display a
// splat icon at their location as well
if (!player.IsActive)
{
AddSplat(player);
}
}
}
}
}
}
// see if the player is touching any bonus icons
protected static void CheckForHitBonuses(Player player)
{
// is this player active?
if (player.IsActive)
{
// for each bonus icon object
for (int iBonus = 0; iBonus < m_Bonuses.Length; iBonus++)
{
// is this bonus active?
if (m_Bonuses[iBonus].IsActive)
{
// is this bonus touching the player?
if (PixelPerfectHelper.DetectCollision(
player, m_Bonuses[iBonus]))
{
// take action based on bonus type
switch (m_Bonuses[iBonus].BonusType)
{
case Bonus.Type.Health: // red
// increase player's health
player.Health += 1;
break;
case Bonus.Type.Score: // blue
// add bonus points to player score
player.Score += 25;
break;
case Bonus.Type.Shield: // green
// increase player's shield
player.Shield += 1;
break;
case Bonus.Type.Weapon: // yellow
// reduce delay between shots
player.FireDelay -= 0.2 * player.FireDelay;
break;
}
// return this bonus to the pool of available
// bonsuses
m_Bonuses[iBonus].IsActive = false;
}
}
}
}
}
// handle player input from the keyboard
public void ProcessInput(double elapsed, Player player, KeyboardState key)
{
if (!player.IsActive && key.IsKeyDown(Keys.Enter))
{
// start or join the game
player.Init();
player.IsActive = true;
}
else if (player.IsActive)
{
// change in location
Vector2 delta = Vector2.Zero;
// moving left or right?
if (key.IsKeyDown(Keys.Left))
{
delta.X = (float)(-player.MovePixelsPerSecond * elapsed);
}
else if (key.IsKeyDown(Keys.Right))
{
delta.X = (float)(player.MovePixelsPerSecond * elapsed);
}
// moving up or down?
if (key.IsKeyDown(Keys.Up))
{
delta.Y = (float)(-player.MovePixelsPerSecond * elapsed);
}
else if (key.IsKeyDown(Keys.Down))
{
delta.Y = (float)(player.MovePixelsPerSecond * elapsed);
}
// actually move the player
player.Location += delta;
// if the player is pressing the action
// button, try to fire a bullet
if (key.IsKeyDown(Keys.Space) && player.Fire())
{
GameObjectManager.AddBullet(player, true);
}
}
}
// handle game pad input
public void ProcessInput(double elapsed, Player player, GamePadState pad)
{
if (!player.IsActive && pad.Buttons.Start == ButtonState.Pressed)
{
// start or join the game
player.Init();
player.IsActive = true;
}
else if (player.IsActive)
{
// change in location
Vector2 delta = Vector2.Zero;
// moving left or right?
if (pad.ThumbSticks.Left.X < 0)
{
delta.X = (float)(-player.MovePixelsPerSecond * elapsed);
}
else if (pad.ThumbSticks.Left.X > 0)
{
delta.X = (float)(player.MovePixelsPerSecond * elapsed);
}
// moving up or down?
if (pad.ThumbSticks.Left.Y > 0)
{
delta.Y = (float)(-player.MovePixelsPerSecond * elapsed);
}
else if (pad.ThumbSticks.Left.Y < 0)
{
delta.Y = (float)(player.MovePixelsPerSecond * elapsed);
}
// actually move the player
player.Location += delta;
// if the player is pressing the action
// button, try to fire a bullet
if (pad.Buttons.A == ButtonState.Pressed && player.Fire())
{
GameObjectManager.AddBullet(player, true);
}
}
}
