public IComponent Clone()
{
PositionComponent ret = new PositionComponent();
ret.Position = Position;
ret.Rotation = Rotation;
return ret;
}
private void generateStar(IEntityManager entityStore, Game game, Texture2D bigStarTex, Texture2D littleStarTex, Frustum generationVolume, double speedAtUnitDepth, double screenDepth, double screenWidth, double screenHeight)
{
//sample a 3d location for the star
Vector3 starLoc = generationVolume.samplePoint(rand);
//determine the speed as a function of the depth
double speed = speedAtUnitDepth / starLoc.Z * screenDepth * screenDepth;
//determine the depth/speed of the star
Entity star = new Entity();
//Component: Has a position, determined by starLoc
PositionComponent pos = new PositionComponent();
Vector3 starLoc2 = generationVolume.TransformFromEuclideanSpaceToPseudoSphericalSpace(starLoc);
pos.Position = new Vector2(starLoc2.X * game.GraphicsDevice.Viewport.Width, starLoc2.Y * game.GraphicsDevice.Viewport.Height);
star.AddComponent(pos);
//Component: Moves at a constant speed
LinearMovementComponent movementStrat = new LinearMovementComponent();
star.AddComponent(movementStrat);
//Component: Has a move speed
MoveSpeedComponent speedComponent = new MoveSpeedComponent();
speedComponent.MoveSpeed = (float)speed;
star.AddComponent(speedComponent);
//Component: Wraps around the screen
ScreenWrappingComponent wrapper = new ScreenWrappingComponent();
star.AddComponent(wrapper);
//Component: Has a texture. This should be little star for far away/slow stars, big otherwise
TextureComponent tex = new TextureComponent();
tex.Texture = (speed > -2.5) ? littleStarTex : bigStarTex;
tex.SourceRect = tex.Texture.Bounds;
star.AddComponent(tex);
//Component: Has a bounding box
AABBComponent aabb = new AABBComponent();
aabb.Width = tex.Texture.Width;
aabb.Height = tex.Texture.Height;
star.AddComponent(aabb);
//Component: Is rendered at a specific layer (just above the background)
RenderLayerComponent layer = new RenderLayerComponent();
layer.LayerID = 1;
star.AddComponent(layer);
entityStore.Add(star);
}
//Create the player entity and its associated entities
private void initializePlayer(IEntityManager entityStore, Game game)
{
Entity player = new Entity();
//give the player health
HealthComponent hp = new HealthComponent();
hp.Health = 100;
player.AddComponent(hp);
//Give the player a position
PositionComponent pos = new PositionComponent();
Vector2 playerPosition = new Vector2(game.GraphicsDevice.Viewport.TitleSafeArea.X, game.GraphicsDevice.Viewport.TitleSafeArea.Y + game.GraphicsDevice.Viewport.TitleSafeArea.Height / 2);
pos.Position = playerPosition;
player.AddComponent(pos);
//And a texture
TextureComponent tex = new TextureComponent();
tex.Texture = game.Content.Load<Texture2D>("spaceArt/png/player");
tex.SourceRect = tex.Texture.Bounds;
player.AddComponent(tex);
//And the ability to react to inputs
PlayerMovementComponent inputManager = new PlayerMovementComponent();
player.AddComponent(inputManager);
//And a constant movement speed
MoveSpeedComponent speed = new MoveSpeedComponent();
speed.MoveSpeed = 8.0f;
player.AddComponent(speed);
//And a bounding box for clamping (and collisions in the future!)
AABBComponent aabb = new AABBComponent();
aabb.Width = tex.Texture.Width;
aabb.Height = tex.Texture.Height;
player.AddComponent(aabb);
//And render layer information. We'll have the player render at level 10 for now.
RenderLayerComponent layer = new RenderLayerComponent();
layer.LayerID = 10;
player.AddComponent(layer);
//And a component to indicate the the player needs to be clamped to the screen
ScreenClampedComponent clamper = new ScreenClampedComponent();
player.AddComponent(clamper);
//And a component that indicates that the player can be destroyed if it runs out of health
DestroyedWhenNoHealthComponent destruct = new DestroyedWhenNoHealthComponent();
player.AddComponent(destruct);
//And the ability to damage entities on contact with them
DamageOnContactComponent damager = new DamageOnContactComponent();
damager.Damage = 10;
player.AddComponent(damager);
entityStore.Add(player);
//also create the player's gun
initializePlayerGuns(entityStore, game, player);
}
private Entity createMineTemplateEntity(Game game)
{
Entity mineTemplate = new Entity();
//Component: Damage the player.
DamageOnContactComponent damage = new DamageOnContactComponent();
damage.Damage = 10;
mineTemplate.AddComponent(damage);
//Component: Has health
HealthComponent health = new HealthComponent();
health.Health = 10;
mineTemplate.AddComponent(health);
//Component: Has a texture
TextureComponent tex = new TextureComponent();
tex.Texture = game.Content.Load<Texture2D>("spaceArt/png/meteorBig");
tex.SourceRect = tex.Texture.Bounds;
mineTemplate.AddComponent(tex);
//Component: Has a position.
PositionComponent pos = new PositionComponent();
pos.Position.X = game.GraphicsDevice.Viewport.Width - 1;
pos.Position.Y = game.GraphicsDevice.Viewport.Height / 2 - tex.SourceRect.Height / 2;
pos.Rotation = Math.PI / 4;
mineTemplate.AddComponent(pos);
//Component: Given a random starting vertical position
RandomPositionOffsetComponent randomOffset = new RandomPositionOffsetComponent();
randomOffset.Minimum = new Vector2(0.0f, -0.4f * game.GraphicsDevice.Viewport.Height);
randomOffset.Maximum = new Vector2(0.0f, 0.4f * game.GraphicsDevice.Viewport.Height);
mineTemplate.AddComponent(randomOffset);
//Component: Moves linearly, continuously rotates
LinearMovementComponent movement = new LinearMovementComponent();
movement.RotationRate = 0.01f;
mineTemplate.AddComponent(movement);
//Component: Moves at constant speed
MoveSpeedComponent speed = new MoveSpeedComponent();
speed.MoveSpeed = -10;
mineTemplate.AddComponent(speed);
//Component: Has a bounding box
AABBComponent aabb = new AABBComponent();
aabb.Height = tex.SourceRect.Height;
aabb.Width = tex.SourceRect.Width;
mineTemplate.AddComponent(aabb);
//Component: Is rendered at a specific layer - just above the player
RenderLayerComponent layer = new RenderLayerComponent();
layer.LayerID = 11;
mineTemplate.AddComponent(layer);
//Component: Is destroyed when it ventures off the (left side of the) screen
DestroyedWhenOffScreenComponent destroyer = new DestroyedWhenOffScreenComponent();
mineTemplate.AddComponent(destroyer);
//Component: Has a score value
// TODO this is more complex than the other ones, involves the changing of global state!
//Component: Is destroyed when it runs out of health
DestroyedWhenNoHealthComponent destroyer2 = new DestroyedWhenNoHealthComponent();
mineTemplate.AddComponent(destroyer2);
//Component: Leaves behind an explosion entity when it is destroyed
AddComponentOnDestructionComponent explosionSpawnTriggerer = new AddComponentOnDestructionComponent();
SpawnEntityComponent explosionSpawner = new SpawnEntityComponent();
explosionSpawner.Factory = new ComposedEntityFactory(new List<IEntityFactory>() {
new CloneEntityFactory(createExplosionEntity(game, aabb)),
new InheritParentComponentEntityFactory(typeof(PositionComponent)) });
explosionSpawnTriggerer.ToAdd = explosionSpawner;
mineTemplate.AddComponent(explosionSpawnTriggerer);
return mineTemplate;
}
private void initializePurpleBackground(IEntityManager entityStore, Game game)
{
Entity bg = new Entity();
//Component: Has a position
PositionComponent pos = new PositionComponent();
pos.Position = new Vector2(0, 0);
bg.AddComponent(pos);
//Component: Has an AABB
AABBComponent aabb = new AABBComponent();
aabb.Width = game.GraphicsDevice.Viewport.Width;
aabb.Height = game.GraphicsDevice.Viewport.Height;
bg.AddComponent(aabb);
//Component: Has a texture
TextureComponent tex = new TextureComponent();
tex.Texture = game.Content.Load<Texture2D>("spaceArt/png/Background/backgroundColor");
tex.SourceRect = tex.Texture.Bounds;
bg.AddComponent(tex);
//Component: Is rendered at a specific layer (the backmost one!)
RenderLayerComponent layer = new RenderLayerComponent();
layer.LayerID = 0;
bg.AddComponent(layer);
entityStore.Add(bg);
}