public GameObject(string name)
{
m_Name = name;
m_ComponentFlags = 0;
m_Position = new PositionComponent();
m_Sprite = new SpriteComponent();
m_WorldBounds = new WorldBoundsComponent();
m_Move = new MoveComponent();
}
public void UpdateSystem(double time, float deltaTime)
{
WorldBoundsComponent bounds = S_Objects[boundsId].m_WorldBounds;
for (int i = 0, n = entities.Count; i < n; i++)
{
PositionComponent pos = S_Objects[i].m_Position;
MoveComponent move = S_Objects[i].m_Move;
// update position based on movement velocity & delta time
pos.x += move.velx * deltaTime;
pos.y += move.vely * deltaTime;
// check against world bounds; put back onto bounds and mirror the velocity component to "bounce" back
if (pos.x < bounds.xMin)
{
move.velx = -move.velx;
pos.x = bounds.xMin;
}
if (pos.x > bounds.xMax)
{
move.velx = -move.velx;
pos.x = bounds.xMax;
}
if (pos.y < bounds.yMin)
{
move.vely = -move.vely;
pos.y = bounds.yMin;
}
if (pos.y > bounds.yMax)
{
move.vely = -move.vely;
pos.y = bounds.yMax;
}
}
}
public CompositionGame()
{
PerfMon.InitializeStarted();
this.graphics = new GraphicsDeviceManager(this);
this.Content.RootDirectory = "Content";
this.IsMouseVisible = true;
this.IsFixedTimeStep = false;
this.texture2Ds = new Texture2D[2];
var worldBoundsGameObject = new GameObject("World Bounds");
var worldBoundsComponent = new WorldBoundsComponent(this.graphics);
worldBoundsGameObject.AddComponent(worldBoundsComponent);
s_GameObjects.Add(worldBoundsGameObject);
var random = new Random();
for (var i = 0; i < BubbleCount; i++)
{
var gameObject = new GameObject($"Bubble #{i}");
var positionComponent = new PositionComponent(random);
gameObject.AddComponent(positionComponent);
var velocityComponent = new VelocityComponent(random, Bubble.MinVelocity, Bubble.MaxVelocity);
gameObject.AddComponent(velocityComponent);
var velocityModifier = (float)random.NextDouble() * (Bubble.MaxModifier - Bubble.MinModifier) + Bubble.MinModifier;
var spriteComponent = new SpriteComponent();
spriteComponent.ColorR = MathB.Select(0, byte.MaxValue, velocityModifier < 0.0f);
spriteComponent.ColorG = MathB.Select(0, byte.MaxValue, velocityModifier >= 0.0f);
spriteComponent.ColorB = byte.MinValue;
var scaleMax = MathF.Select(Bubble.MinModifier, Bubble.MaxModifier, velocityModifier >= 0.0f);
spriteComponent.Alpha = (byte)(int)(128 * (velocityModifier / scaleMax));
spriteComponent.Index = Sprites.Bubble;
gameObject.AddComponent(spriteComponent);
var velocityModifierComponent = new VelocityModifierComponent();
velocityModifierComponent.VelocityModifier = velocityModifier;
gameObject.AddComponent(velocityModifierComponent);
var sizeComponent = new SizeComponent();
sizeComponent.Size = 64;
gameObject.AddComponent(sizeComponent);
s_GameObjects.Add(gameObject);
}
for (int i = 0; i < DotCount; i++)
{
var gameObject = new GameObject($"Dot #{i}");
var positionComponent = new PositionComponent(random);
gameObject.AddComponent(positionComponent);
var velocityComponent = new VelocityComponent(random, Dot.MinVelocity, Dot.MaxVelocity);
gameObject.AddComponent(velocityComponent);
var spriteComponent = new SpriteComponent();
var colors = new byte[3];
random.NextBytes(colors);
spriteComponent.ColorR = colors[0];
spriteComponent.ColorG = colors[1];
spriteComponent.ColorB = colors[2];
spriteComponent.Alpha = byte.MaxValue;
spriteComponent.Index = Sprites.Dot;
gameObject.AddComponent(spriteComponent);
var modifyVelocityComponent = new ModifyVelocityComponent();
gameObject.AddComponent(modifyVelocityComponent);
s_GameObjects.Add(gameObject);
}
}