/// <summary>
/// Add a new animated sprite
/// </summary>
public bool Add(AnimSprite a)
{
if (animatedSprites.Count < GameOptions.MaxSprites)
{
animatedSprites.AddLast(a);
return(true);
}
return(false);
}
/// <summary>
/// Updates the player ship for given elapsed time
/// </summary>
public void Update(
float elapsedTime, // elapsed time on this frame
CollisionMesh collision, // level collision mesh
EntityList entities) // level spawn points
{
if (collision == null)
{
throw new ArgumentNullException("collision");
}
if (entities == null)
{
throw new ArgumentNullException("entities");
}
// updates damage screen time (zero for no damage indication)
damageTime = Math.Max(0.0f, damageTime - elapsedTime);
// if player dead
if (IsAlive == false)
{
// disable engine particle system
particleBoost.Enabled = false;
// updates dead time (if zero, player is alive)
deadTime = Math.Max(0.0f, deadTime - elapsedTime);
// if player dead time expires, respawn
if (IsAlive == true)
{
// reset player to a random spawn point
Reset(entities.GetTransformRandom(random));
// add spawn animated sprite in front of player
Vector3 Pos = movement.position + 10 * movement.rotation.Forward;
gameManager.AddAnimSprite(AnimSpriteType.Spawn,
Pos, 140, 80, 30, DrawMode.Additive, playerIndex);
// play spawn sound
gameManager.PlaySound("ship_spawn");
// reset energy, shield and boost
energy = 1.0f;
shield = 1.0f;
boost = 1.0f;
missileCount = 3;
}
return;
}
// hold position before movement
Vector3 lastPostion = movement.position;
// update movement
movement.Update(elapsedTime);
// test for collision with level
Vector3 collisionPosition;
if (collision.BoxMove(box, lastPostion, movement.position,
1.0f, 0.0f, 3, out collisionPosition))
{
// update to valid position after collision
movement.position = collisionPosition;
// compute new velocity after collision
Vector3 newVelocity =
(collisionPosition - lastPostion) * (1.0f / elapsedTime);
// if collision sound enabled
if (collisionSound)
{
// test collision angle to play collision sound
Vector3 WorldVel = movement.WorldVelocity;
float dot = Vector3.Dot(
Vector3.Normalize(WorldVel), Vector3.Normalize(newVelocity));
if (dot < 0.7071f)
{
// play collision sound
gameManager.PlaySound("ship_collide");
// set rumble intensity
dot = 1 - 0.5f * (dot + 1);
gameManager.SetVibration(playerIndex, dot * 0.5f);
// disable collision sounds until ship stops colliding
collisionSound = false;
}
}
// set new velocity after collision
movement.WorldVelocity = newVelocity;
}
else
{
// clear of collisions, re-enable collision sounds
collisionSound = true;
}
// update player transform
transform = movement.rotation;
transform.Translation = movement.position;
// compute inverse transform
transformInverse = Matrix.Invert(transform);
// get normalized player velocity
float velocityFactor = movement.VelocityFactor;
// update bobbing
bobbingTime += elapsedTime;
float bobbingFactor = 1.0f - velocityFactor;
float time = GameOptions.ShipBobbingSpeed * bobbingTime %
(2 * MathHelper.TwoPi);
float distance = bobbingFactor * GameOptions.ShipBobbingRange;
bobbing.M41 = distance * (float)Math.Sin(time * 0.5f);
bobbing.M42 = distance * (float)Math.Sin(time);
bobbingInverse.M41 = -bobbing.M41;
bobbingInverse.M42 = -bobbing.M42;
// compute transform with bobbing
Matrix bobbingTransform = bobbing * transform;
// update particle system position
particleBoost.Enabled = true;
particleBoost.SetTransform(boostTransform * bobbingTransform);
// if shield active
if (shieldUse)
{
// update shield position
animatedSpriteShield.Position = bobbingTransform.Translation +
10f * bobbingTransform.Forward;
// update shiled charge
shield -= elapsedTime / GameOptions.ShieldUse;
// if shield charge depleted
if (shield < 0)
{
// disable shield
shieldUse = false;
shield = 0;
// kill shield animated sprite
animatedSpriteShield.SetTotalTime(0);
animatedSpriteShield = null;
}
}
else
{
// change shield
shield = Math.Min(1.0f,
shield + elapsedTime / GameOptions.ShieldRecharge);
}
// if boost active
if (boostUse)
{
// increase ship maximum velocity
movement.maxVelocity = GameOptions.MovementVelocityBoost;
// apply impulse force forward
AddImpulseForce(transform.Forward * GameOptions.BoostForce);
// set particle system velocity scale
particleBoost.VelocityScale = Math.Min(1.0f,
particleBoost.VelocityScale + 4.0f * elapsedTime);
// update shield charge
boost -= elapsedTime / GameOptions.BoostUse;
// if boost depleated
if (boost < 0)
{
// disable boost
boostUse = false;
boost = 0;
}
}
else
{
// slowly returns ship maximum velocity to normal levels
if (movement.maxVelocity > GameOptions.MovementVelocity)
{
movement.maxVelocity -= GameOptions.BoostSlowdown * elapsedTime;
}
// slowly returns particle system velocity scale to normal levels
particleBoost.VelocityScale = Math.Max(0.1f,
particleBoost.VelocityScale - 2.0f * elapsedTime);
// charge boost
boost = Math.Min(1.0f,
boost + elapsedTime / GameOptions.BoostRecharge);
}
// charge blaster
blaster = Math.Min(1.0f,
blaster + elapsedTime / GameOptions.BlasterChargeTime);
// charge missile
missile = Math.Min(1.0f,
missile + elapsedTime / GameOptions.MissileChargeTime);
// update chase camera
chaseCamera.ChasePosition = transform.Translation;
chaseCamera.ChaseDirection = transform.Forward;
chaseCamera.Up = transform.Up;
chaseCamera.Update(elapsedTime, collision);
}
/// <summary>
/// Process input for player ship (movement and weapons)
/// </summary>
public void ProcessInput(float elapsedTime, InputManager input, int player)
{
if (input == null)
{
throw new ArgumentNullException("input");
}
// if dead, don't process input for player
if (IsAlive == false)
{
return;
}
// process movement related inputs
movement.ProcessInput(elapsedTime, input.CurrentState, player);
// if player invert Y is enabled, invert X rotation force
if (gameManager.GetInvertY(player))
{
movement.rotationForce.X = -movement.rotationForce.X;
}
// if blaster ready and input activated
if (blaster == 1)
{
if (input.IsKeyPressed(player, Keys.Space) ||
input.CurrentState.padState[player].Triggers.Right > 0)
{
// fire blaster
FireProjectile(ProjectileType.Blaster, GameOptions.BlasterVelocity);
// reset charge time
blaster = 0;
}
}
// if missile is ready and input activated
if (missile == 1 && missileCount > 0)
{
if (input.IsKeyPressed(player, Keys.Enter) ||
input.IsTriggerPressedLeft(player))
{
// fire missile
FireProjectile(ProjectileType.Missile, GameOptions.MissileVelocity);
// subtract missile count
AddMissile(-1);
// reset charge time
missile = 0;
}
}
// if shield is ready and input
if (shield == 1)
{
if (input.IsKeyPressed(player, Keys.R) || input.IsButtonPressedA(player))
{
// activate shield
shieldUse = true;
// create animated sprite
animatedSpriteShield =
gameManager.AddAnimSprite(AnimSpriteType.Shield,
transform.Translation + transform.Forward * 10,
160, 80, 15, DrawMode.Additive, player);
// play shield sound
gameManager.PlaySound("shield_activate");
}
}
// if boost ready and input activated
if (boost == 1)
{
if (input.IsKeyPressed(player, Keys.LeftShift) ||
input.IsKeyPressed(player, Keys.RightShift) ||
input.IsButtonPressedY(player) ||
input.IsButtonPressedLeftStick(player))
{
// activate boost
boostUse = true;
// play boost sound
gameManager.PlaySound("ship_boost");
}
}
// if camara switch input activated
if (input.IsKeyPressed(player, Keys.Back) || input.IsButtonPressedB(player))
{
// switch 3rd person mode
camera3rdPerson = !camera3rdPerson;
// reset camera
chaseCamera.Reset();
}
}
/// <summary>
/// Add a new animated sprite
/// </summary>
public bool Add(AnimSprite a)
{
if (animatedSprites.Count < GameOptions.MaxSprites)
{
animatedSprites.AddLast(a);
return true;
}
return false;
}
/// <summary>
/// Create a new animated sprite and add it to the animated sprite manager
/// </summary>
public AnimSprite AddAnimSprite(
AnimSpriteType type,
Vector3 position,
float radius,
float viewOffset,
float frameRate,
DrawMode mode,
int player)
{
// create animated sprite
AnimSprite a = new AnimSprite(type, position, radius, viewOffset,
animatedSpriteTextures[(int)type], 256, 256,
frameRate, mode, player);
// add it to the animated sprite manager
animatedSprite.Add(a);
return a;
}
// level spawn points
/// <summary>
/// Updates the player ship for given elapsed time
/// </summary>
public void Update(
float elapsedTime, // elapsed time on this frame
CollisionMesh collision, // level collision mesh
EntityList entities)
{
if (collision == null)
{
throw new ArgumentNullException("collision");
}
if (entities == null)
{
throw new ArgumentNullException("entities");
}
// updates damage screen time (zero for no damage indication)
damageTime = Math.Max(0.0f, damageTime - elapsedTime);
// if player dead
if (IsAlive == false)
{
// disable engine particle system
particleBoost.Enabled = false;
// updates dead time (if zero, player is alive)
deadTime = Math.Max(0.0f, deadTime - elapsedTime);
// if player dead time expires, respawn
if (IsAlive == true)
{
// reset player to a random spawn point
Reset(entities.GetTransformRandom(random));
// add spawn animated sprite in front of player
Vector3 Pos = movement.position + 10 * movement.rotation.Forward;
gameManager.AddAnimSprite(AnimSpriteType.Spawn,
Pos, 140, 80, 30, DrawMode.Additive, playerIndex);
// play spawn sound
gameManager.PlaySound("ship_spawn");
// reset energy, shield and boost
energy = 1.0f;
shield = 1.0f;
boost = 1.0f;
missileCount = 3;
}
return;
}
// hold position before movement
Vector3 lastPostion = movement.position;
// update movement
movement.Update(elapsedTime);
// test for collision with level
Vector3 collisionPosition;
if (collision.BoxMove(box, lastPostion, movement.position,
1.0f, 0.0f, 3, out collisionPosition))
{
// update to valid position after collision
movement.position = collisionPosition;
// compute new velocity after collision
Vector3 newVelocity =
(collisionPosition - lastPostion) * (1.0f / elapsedTime);
// if collision sound enabled
if (collisionSound)
{
// test collision angle to play collision sound
Vector3 WorldVel = movement.WorldVelocity;
float dot = Vector3.Dot(
Vector3.Normalize(WorldVel), Vector3.Normalize(newVelocity));
if (dot < 0.7071f)
{
// play collision sound
gameManager.PlaySound("ship_collide");
// set rumble intensity
dot = 1 - 0.5f * (dot + 1);
gameManager.SetVibration(playerIndex, dot * 0.5f);
// disable collision sounds until ship stops colliding
collisionSound = false;
}
}
// set new velocity after collision
movement.WorldVelocity = newVelocity;
}
else
// clear of collisions, re-enable collision sounds
collisionSound = true;
// update player transform
transform = movement.rotation;
transform.Translation = movement.position;
// compute inverse transform
transformInverse = Matrix.Invert(transform);
// get normalized player velocity
float velocityFactor = movement.VelocityFactor;
// update bobbing
bobbingTime += elapsedTime;
float bobbingFactor = 1.0f - velocityFactor;
float time = GameOptions.ShipBobbingSpeed * bobbingTime %
(2 * MathHelper.TwoPi);
float distance = bobbingFactor * GameOptions.ShipBobbingRange;
bobbing.M41 = distance * (float)Math.Sin(time * 0.5f);
bobbing.M42 = distance * (float)Math.Sin(time);
bobbingInverse.M41 = -bobbing.M41;
bobbingInverse.M42 = -bobbing.M42;
// compute transform with bobbing
Matrix bobbingTransform = bobbing * transform;
// update particle system position
particleBoost.Enabled = true;
particleBoost.SetTransform(boostTransform * bobbingTransform);
// if shield active
if (shieldUse)
{
// update shield position
animatedSpriteShield.Position = bobbingTransform.Translation +
10f * bobbingTransform.Forward;
// update shiled charge
shield -= elapsedTime / GameOptions.ShieldUse;
// if shield charge depleted
if (shield < 0)
{
// disable shield
shieldUse = false;
shield = 0;
// kill shield animated sprite
animatedSpriteShield.SetTotalTime(0);
animatedSpriteShield = null;
}
}
else
// change shield
shield = Math.Min(1.0f,
shield + elapsedTime / GameOptions.ShieldRecharge);
// if boost active
if (boostUse)
{
// increase ship maximum velocity
movement.maxVelocity = GameOptions.MovementVelocityBoost;
// apply impulse force forward
AddImpulseForce(transform.Forward * GameOptions.BoostForce);
// set particle system velocity scale
particleBoost.VelocityScale = Math.Min(1.0f,
particleBoost.VelocityScale + 4.0f * elapsedTime);
// update shield charge
boost -= elapsedTime / GameOptions.BoostUse;
// if boost depleated
if (boost < 0)
{
// disable boost
boostUse = false;
boost = 0;
}
}
else
{
// slowly returns ship maximum velocity to normal levels
if (movement.maxVelocity > GameOptions.MovementVelocity)
movement.maxVelocity -= GameOptions.BoostSlowdown * elapsedTime;
// slowly returns particle system velocity scale to normal levels
particleBoost.VelocityScale = Math.Max(0.1f,
particleBoost.VelocityScale - 2.0f * elapsedTime);
// charge boost
boost = Math.Min(1.0f,
boost + elapsedTime / GameOptions.BoostRecharge);
}
// charge blaster
blaster = Math.Min(1.0f,
blaster + elapsedTime / GameOptions.BlasterChargeTime);
// charge missile
missile = Math.Min(1.0f,
missile + elapsedTime / GameOptions.MissileChargeTime);
// update chase camera
chaseCamera.ChasePosition = transform.Translation;
chaseCamera.ChaseDirection = transform.Forward;
chaseCamera.Up = transform.Up;
chaseCamera.Update(elapsedTime, collision);
}
/// <summary>
/// Process input for player ship (movement and weapons)
/// </summary>
public void ProcessInput(float elapsedTime, InputManager input, int player)
{
if (input == null)
{
throw new ArgumentNullException("input");
}
// if dead, don't process input for player
if (IsAlive == false)
{
return;
}
// process movement related inputs
movement.ProcessInput(elapsedTime, input.CurrentState, player);
// if player invert Y is enabled, invert X rotation force
if (gameManager.GetInvertY(player))
movement.rotationForce.X = -movement.rotationForce.X;
// if blaster ready and input activated
if (blaster == 1)
if (input.IsKeyPressed(player, Keys.Space) ||
input.CurrentState.padState[player].Triggers.Right > 0)
{
// fire blaster
FireProjectile(ProjectileType.Blaster, GameOptions.BlasterVelocity);
// reset charge time
blaster = 0;
}
// if missile is ready and input activated
if (missile == 1 && missileCount > 0)
if (input.IsKeyPressed(player, Keys.Enter) ||
input.IsTriggerPressedLeft(player))
{
// fire missile
FireProjectile(ProjectileType.Missile, GameOptions.MissileVelocity);
// subtract missile count
AddMissile(-1);
// reset charge time
missile = 0;
}
// if shield is ready and input
if (shield == 1)
if (input.IsKeyPressed(player,Keys.R) || input.IsButtonPressedA(player))
{
// activate shield
shieldUse = true;
// create animated sprite
animatedSpriteShield =
gameManager.AddAnimSprite(AnimSpriteType.Shield,
transform.Translation + transform.Forward * 10,
160, 80, 15, DrawMode.Additive, player);
// play shield sound
gameManager.PlaySound("shield_activate");
}
// if boost ready and input activated
if (boost == 1)
if (input.IsKeyPressed(player, Keys.LeftShift) ||
input.IsKeyPressed(player, Keys.RightShift) ||
input.IsButtonPressedY(player) ||
input.IsButtonPressedLeftStick(player))
{
// activate boost
boostUse = true;
// play boost sound
gameManager.PlaySound("ship_boost");
}
// if camara switch input activated
if (input.IsKeyPressed(player, Keys.Back) || input.IsButtonPressedB(player))
{
// switch 3rd person mode
camera3rdPerson = !camera3rdPerson;
// reset camera
chaseCamera.Reset();
}
}
