//add an ore drop using a gameobject's positional/velocity properties
public static void AddOreDrop(GameObject origin)
{
Particle temp = new Particle( //generate the ore drop
ContentHandler.Textures[ORE_KEY],
origin.WorldCenter,
origin.Velocity +
Vector2.Multiply(AsteroidManager.GetVelocity(origin.Rotation + MathHelper.ToRadians(Util.rnd.Next(-90, 90))), 0.5f),
Color.White,
ORE_DROP_FTL,
true,
origin.Rotation,
(float)Util.rnd.NextDouble(-0.1f, 0.1f),
1f, 1f, SpriteEffects.None,
ContentHandler.Textures[ORE_KEY].GetMeanRadius(8),
0, 0, 8, 1, 8, 0, false, ORE_FRAME_DELAY);
temp.Animating = true;
OreDrops.Add(temp);
}
//splits a destroyed large asteroid into a small one
static void splitAsteroid(GameObject asteroidToSplit)
{
//split asteroid into small, inherting most of the characteristics
GameObject split = new GameObject(
ContentHandler.Textures[SMALL_ASTEROID],
asteroidToSplit.WorldCenter,
GetVelocity(asteroidToSplit.RotationDegrees + Util.rnd.Next(90, 270)), //get a random new velocity
asteroidToSplit.TintColor,
false, //nothing to animate
asteroidToSplit.Rotation,
asteroidToSplit.RotationalVelocity,
asteroidToSplit.Scale,
asteroidToSplit.Depth,
false,
ContentHandler.Textures[SMALL_ASTEROID].GetMeanRadius()); //get rounded radius
Asteroids.Add(split);
}
public static void DestroyAsteroid(GameObject asteroid, bool effect = true)
{
int x = Util.rnd.Next(50); //temp var
//around 50% chance of splitting if asteroid is a large non-ore asteroid
if (x > 25 && asteroid.Texture == ContentHandler.Textures[LARGE_ASTEROID])
splitAsteroid(asteroid);
if (asteroid.Texture == ContentHandler.Textures[ORE_ASTEROID])
{
for (int i = 0; i < Util.rnd.Next(ORE_MIN_DROP, ORE_MAX_DROP); i++)
OreManager.AddOreDrop(asteroid); //if it is an ore asteroid, add drop(s) on destroy
}
if(effect) //add a particle effect if flag is true
addExplosion(asteroid.WorldCenter);
Asteroids.Remove(asteroid); //remove the asteroid from the list
}
//add a specified type asteroid
public static void AddAsteroid(AsteroidType type, bool offScreen = false)
{
GameObject tempAsteroid; //temporary asteroid
bool isOverlap = false; //overlap flag
int counter = 0; //generation counter
Texture2D text; //temporary texture
switch (type) //assign appropriate texture to asteroid type
{
case AsteroidType.Small: text = ContentHandler.Textures[SMALL_ASTEROID];
break;
case AsteroidType.Large: text = ContentHandler.Textures[LARGE_ASTEROID];
break;
case AsteroidType.Ore: text = ContentHandler.Textures[ORE_ASTEROID];
break;
default:
throw new InvalidOperationException();
}
do //Do-While to ensure that the asteroid gets generated at least once
{
float rot = MathHelper.ToRadians((float)Util.rnd.NextDouble(0f, 359f)); //random rotation
//random rotational velocity; within constants
float rotVel = MathHelper.ToRadians((float)Util.rnd.NextDouble(MINROTATIONALVELOCITY, MAXROTATIONALVELOCITY));
float colRadius = text.GetMeanRadius();
Vector2 vel; //temporary velocity
Vector2 worldPos; //temporary worldposition
if (offScreen) //if asteroid needs to be generated offscreen
{
SpawnSide side = Util.RandomEnumValue<SpawnSide>(); //pick a random world border to spawn it from
switch (side)
{
case SpawnSide.Up:
vel = GetVelocity(MathHelper.ToRadians((float)Util.rnd.Next(140, 230))); //get a velocity pointing between 140/230 degrees
worldPos = new Vector2( //and add a velocity which will knock it into the world borders next tick
Util.rnd.Next(Camera.WorldRectangle.X, Camera.WorldRectangle.Width),
Camera.WorldRectangle.Y - text.Height);
break;
case SpawnSide.Left:
vel = GetVelocity(MathHelper.ToRadians((float)Util.rnd.Next(50, 130))); //between 50/130 degrees
worldPos = new Vector2(
Camera.WorldRectangle.X - text.Width,
Util.rnd.Next(Camera.WorldRectangle.Y, Camera.WorldRectangle.Height));
break;
case SpawnSide.Right:
vel = GetVelocity(MathHelper.ToRadians((float)Util.rnd.Next(230, 310))); //between 230/310 degrees
worldPos = new Vector2(
Camera.WorldRectangle.Width + text.Width,
Util.rnd.Next(Camera.WorldRectangle.Y, Camera.WorldRectangle.Height));
break;
case SpawnSide.Down:
vel = GetVelocity(
MathHelper.ToRadians(Util.rnd.Next(320, 410) % 360)); //between 320/(360 + 50) degrees
worldPos = new Vector2(
Util.rnd.Next(Camera.WorldRectangle.X, Camera.WorldRectangle.Width),
Camera.WorldRectangle.Height + text.Height);
break;
default:
throw new InvalidOperationException();
}
}
else //if the asteroid does not need to be generated offscreen...
{
vel = GetVelocity(rot); //get a random velocity according to the rotation
worldPos = new Vector2( //and simply get a random position in the world to place it...
Util.rnd.Next(Camera.WorldRectangle.X, Camera.WorldRectangle.Width),
Util.rnd.Next(Camera.WorldRectangle.Y, Camera.WorldRectangle.Height));
}
tempAsteroid = new GameObject( //init a temporary asteroid to check for overlaps
text, worldPos, vel, Color.White, false, rot, rotVel, 1f, ASTEROID_DRAW_DEPTH, false, text.GetMeanRadius());
foreach (GameObject asteroid in Asteroids)
{
if (tempAsteroid.BoundingBox.Intersects(asteroid.BoundingBox)
|| tempAsteroid.BoundingCircle.Intersects(Player.SpawnCircle))
{
isOverlap = true; //flag if overlapping
break; //and break; no need to check all other asteroids
}
}
counter++; //increase counter
} while (isOverlap && counter < MAX_TRIES); //if overlapping, loop, if maxtries exceeded, quit
if (counter >= MAX_TRIES)
{
return;
}
else
{
Asteroids.Add(tempAsteroid); //add the temp asteroid if not at maxtries
}
}
//simple bounding circle collision detection check
public bool IsCircleColliding(GameObject obj)
{
if (BoundingCircle.Intersects(obj.BoundingCircle))
return true;
else
return false;
}
//tests for both bb and bc collisions with another game object
public bool IsCircleAndBoxColliding(GameObject obj)
{
if (IsBoxColliding(obj) && IsCircleColliding(obj))
return true;
return false;
}
//overload of previous which takes a GameObject instead of a rectangle
public bool IsBoxColliding(GameObject obj)
{
if (BoundingBox.Intersects(obj.BoundingBox))
return true;
else
return false;
}
//overload with x/rotation offset
public static Vector2 GetOffset(GameObject root, float radius, float rotation)
{
Vector2 temp = (root.Rotation + MathHelper.ToRadians(rotation)).RotationToVector();
temp *= radius;
return root.WorldCenter + temp;
}
//find the specified offset of a rotated root object
public static Vector2 GetOffset(GameObject root, float radius)
{
Vector2 temp = root.rotationToVector();
temp.X *= radius;
temp.Y *= radius;
return root.WorldCenter + temp;
}
//bounce two objects and return a pair
public static GameObjectPair Bounce(GameObject obj1, GameObject obj2)
{
if (obj1.Equals(obj2)) //can't bounce the same object!
throw new InvalidOperationException("Identical objects");
Vector2 centerOfMass = (obj1.Velocity + obj2.Velocity) / 2; //calculate the center of mass
Vector2 normal1 = GetNormal(new GameObjectPair(obj1, obj2));
Vector2 normal2 = GetNormal(new GameObjectPair(obj2, obj1));
//Bounce Obj1
obj1.Velocity -= centerOfMass;
obj1.Velocity = Vector2.Reflect(obj1.Velocity, normal1);
obj1.Velocity += centerOfMass;
//Bounce Obj2
obj2.Velocity -= centerOfMass;
obj2.Velocity = Vector2.Reflect(obj2.Velocity, normal2);
obj2.Velocity += centerOfMass;
return new GameObjectPair(obj1, obj2);
}
public GameObjectPair(GameObject obj1, GameObject obj2)
{
Object1 = obj1;
Object2 = obj2;
}
public static bool IsHit(GameObject obj, out Projectile shotHit, FoF_Ident alignment = FoF_Ident.Neutral)
{
foreach (Projectile shot in Projectiles) //loop through each shot to check if hit
{
if (shot.Identification != alignment && shot.IsDummyProjectile == false) //check if friendly & not a dummy
{
if (obj.IsCircleColliding(shot)) //check if colliding
{
HitEffects.Add(new ParticleEmitter( //add a hit effect
EFFECT_MAX_PARTICLES,
obj.WorldCenter.Center(shot.WorldCenter),
ContentHandler.Textures["particle"].ToTextureList(),
EFFECT_COLORS.ToList<Color>(),
EFFECT_FRAMES_TO_LIVE,
true,
true,
EFFECT_TIME_TO_EMIT,
EFFECT_MAX_PARTICLES / DETONATE_TIME_TO_EMIT,
EFFECT_EJECTION_SPEED,
EFFECT_RANDOMIZATION,
shot.RotationDegrees + 180,
EFFECT_SPRAY_WIDTH));
shotHit = shot; //set the out param
shot.Active = false;
if (shot.DetonateEffect)
addDetonateEffect(shot.WorldCenter);
return true; //return true
}
}
}
shotHit = null; //set the shot to null
return false; //and return false
}
public static void Initialize()
{
#region Equipment Definitions
Slot1 = LASER_KEY; //set initial equipment
Slot2 = TORPEDO_KEY;
EquipmentDictionary = new Dictionary<string, EquipmentData>(); //initialize the dictionary
//add torpedoes
EquipmentDictionary.Add(TORPEDO_KEY, new EquipmentData(
ContentHandler.Textures[TORPEDO_KEY],
300,
0f,
TORPEDO_KEY,
COLLISION_SFX,
2000,
30,
20,
50,
1,
0,
"Torpedo Launcher",
true, true));
//add lasers
EquipmentDictionary.Add(LASER_KEY, new EquipmentData(
ContentHandler.Textures[LASER_KEY],
750,
150,
LASER_KEY,
COLLISION_SFX,
450,
10,
6,
5,
1,
0,
"Pulse Laser"));
//add shell
EquipmentDictionary.Add(SHELL_KEY, new EquipmentData(
ContentHandler.Textures[SHELL_KEY],
1000,
300,
SHELL_KEY,
COLLISION_SFX,
175,
10,
3,
50,
35,
30,
"Scatter-Fire",
false, true));
//add rapid-fire sliver
EquipmentDictionary.Add(SLIVER_KEY, new EquipmentData(
ContentHandler.Textures[SLIVER_KEY],
450,
50,
SLIVER_KEY,
IMPACT_SFX,
400,
1,
5,
1,
2,
45,
"Shrapnel Projector"));
//add missiles
EquipmentDictionary.Add(MISSILE_KEY, new EquipmentData(
ContentHandler.Textures[MISSILE_KEY],
1000,
0,
MISSILE_KEY,
COLLISION_SFX,
500,
20,
10,
30,
1,
40,
"Rapid-Missile Launcher",
true,
true));
#endregion
Health = STARTING_HEALTH;
CurrentOre = STARTING_ORE;
CollectableOre = LevelManager.Levels[0].CollectableOre;
ActiveSlot = INITIAL_ACTIVE_SLOT;
StabilizeRotation = true;
#region Component Initialization
//init the ship
Ship = new GameObject(
ContentHandler.Textures[SHIP_TEXTURE],
new Vector2(Camera.WorldRectangle.Width / 2, Camera.WorldRectangle.Height),
new Vector2(0, -50),
Color.White,
false,
0f,
0f,
1f,
SHIP_DEPTH,
false,
ContentHandler.Textures[SHIELD_KEY].GetMeanRadius(), //use the shield texture as a collision boundary
0, 0, SpriteEffects.None, 8, 1, 8, 2, SHIP_FRAME_DELAY);
//init the shield overlay
Shield = new GameObject(
ContentHandler.Textures[SHIELD_KEY],
Ship.WorldCenter,
Ship.Velocity,
Color.Transparent);
//init the left-side particle engine trail
LeftEngineTrail = new ParticleEmitter(
Int32.MaxValue,
GameObject.GetOffset(Ship, THRUST_OFFSET, ROTATION_OFFSET),
ContentHandler.Textures["particle"].ToTextureList(),
TRAIL_COLORS.ToList<Color>(),
TRAIL_FTL,
false,
true,
-1,
TRAIL_PPT,
TRAIL_EJECTION_SPEED,
TRAIL_RANDOM_MARGIN,
0f,
TRAIL_SPRAYWIDTH);
//same for right side
RightEngineTrail = new ParticleEmitter(
Int32.MaxValue,
GameObject.GetOffset(Ship, THRUST_OFFSET, -ROTATION_OFFSET),
ContentHandler.Textures["particle"].ToTextureList(),
TRAIL_COLORS.ToList<Color>(),
TRAIL_FTL,
false,
true,
-1,
TRAIL_PPT,
TRAIL_EJECTION_SPEED,
TRAIL_RANDOM_MARGIN,
0f,
TRAIL_SPRAYWIDTH);
//explosion particle textures
explosionParticles.Add(ContentHandler.Textures["junk1"]);
explosionParticles.Add(ContentHandler.Textures["junk2"]);
explosionParticles.Add(ContentHandler.Textures["junk3"]);
ExplosionEmitter = new ParticleEmitter(
EXPLOSION_PARTICLES_TO_EMIT,
Ship.WorldCenter,
explosionParticles,
EXPLOSION_COLORS.ToList<Color>(),
EXPLOSION_FTL,
false,
true,
EXPLOSION_TIME_TO_EMIT,
EXPLOSION_PARTICLES_TO_EMIT / EXPLOSION_TIME_TO_EMIT,
EXPLOSION_EJECTION_SPEED,
EXPLOSION_RANDOMIZATION,
0f, 180f);
#endregion
StoredOre = 100; //TEMP
SpawnCircle = new Circle(Ship.WorldCenter, MIN_SPAWN_DISTANCE);
}
public NPC(
string texturekey,
string damagekey,
string deathkey,
AIState initialState,
Vector2 initialPos,
Vector2 initialVel,
Vector2 initialTarget,
Color tintColor,
int startingHealth,
EquipmentData equip,
int colRadius,
int activationRadius,
float trailOffset,
float weaponOffset,
float maxSpeed,
float trackSpeed,
float maxAccelSpeed,
float initialRot = 0f,
float initialRotVel = 0f,
int totalFrames = 0,
int rows = 1,
int columns = 1,
int startingFrame = 0,
float frameDelay = 0,
FoF_Ident ident = FoF_Ident.Enemy,
bool activated = false)
{
Ship = new GameObject(
ContentHandler.Textures[texturekey],
initialPos,
initialVel,
tintColor,
false,
initialRot,
initialRotVel,
1f,
NPC_DEPTH,
false,
colRadius,
0, 0,
SpriteEffects.None,
totalFrames,
rows,
columns,
startingFrame,
frameDelay);
Shield = new GameObject(
ContentHandler.Textures[texturekey + NPCManager.SHIELD_TEXTURE],
Ship.WorldCenter,
Ship.Velocity,
Color.Transparent,
false,
Ship.Rotation,
Ship.RotationalVelocity,
Ship.Scale,
Ship.Depth);
CurrentState = initialState;
LastState = initialState;
DamageSoundKey = damagekey;
DeathSoundKey = deathkey;
Weapon = equip;
if (equip != null) { firedelay = equip.RefireDelay; }
ActivationRadius = activationRadius;
Activated = activated;
TrailOffset = trailOffset;
WeaponOffset = weaponOffset;
MaxSpeed = maxSpeed;
TrackSpeed = trackSpeed;
AccelerationSpeed = maxAccelSpeed;
Target = Vector2.Normalize(initialTarget);
Identification = ident;
StartingHealth = startingHealth;
Health = StartingHealth;
trail = new ParticleEmitter( //initialize the engine trail particle emitter
TRAIL_MAX_PARTICLES,
GameObject.GetOffset(Ship, TrailOffset),
ContentHandler.Textures[TRAIL_PARTICLE].ToTextureList(),
TRAIL_COLORS.ToList<Color>(),
TRAIL_FTL,
false,
true,
-1,
TRAIL_PPT,
TRAIL_EJECTION_SPEED,
TRAIL_RANDOM_MARGIN,
Ship.RotationDegrees + 180,
TRAIL_SPRAYWIDTH);
//initialize the state logic
switchState(initialState);
//pick a slightly randomized evasion damage threshold
dmgThreshold = Util.rnd.Next(
EVADE_DMG_THRESHOLD_MIN,
EVADE_DMG_THRESHOLD_MAX);
reattackTime = Util.rnd.Next(
REATTACK_TIME_MIN,
REATTACK_TIME_MAX);
evadeTime = Util.rnd.Next(
EVADE_TIME_MIN,
EVADE_TIME_MAX);
shotsBeforeCooldown = Util.rnd.Next(
COOLDOWN_MIN,
COOLDOWN_MAX);
shotsCounter = 0;
}