ABasicParticle.cs

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using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using ReLogic.Content;
 
namespace Terraria.Graphics.Renderers;
 
public abstract class ABasicParticle : IPooledParticle, IParticle
{
    public Vector2 AccelerationPerFrame;
 
    public Vector2 Velocity;
 
    public Vector2 LocalPosition;
 
    protected Asset<Texture2D> _texture;
 
    protected Rectangle _frame;
 
    protected Vector2 _origin;
 
    public float Rotation;
 
    public float RotationVelocity;
 
    public float RotationAcceleration;
 
    public Vector2 Scale;
 
    public Vector2 ScaleVelocity;
 
    public Vector2 ScaleAcceleration;
 
    public bool ShouldBeRemovedFromRenderer { get; protected set; }
 
    public bool IsRestingInPool { get; private set; }
 
    public ABasicParticle()
    {
        _texture = null;
        _frame = Rectangle.Empty;
        _origin = Vector2.Zero;
        Velocity = Vector2.Zero;
        LocalPosition = Vector2.Zero;
        ShouldBeRemovedFromRenderer = false;
    }
 
    public virtual void SetBasicInfo(Asset<Texture2D> textureAsset, Rectangle? frame, Vector2 initialVelocity, Vector2 initialLocalPosition)
    {
        _texture = textureAsset;
        _frame = (frame.HasValue ? frame.Value : _texture.Frame());
        _origin = _frame.Size() / 2f;
        Velocity = initialVelocity;
        LocalPosition = initialLocalPosition;
        ShouldBeRemovedFromRenderer = false;
    }
 
    public virtual void Update(ref ParticleRendererSettings settings)
    {
        Velocity += AccelerationPerFrame;
        LocalPosition += Velocity;
        RotationVelocity += RotationAcceleration;
        Rotation += RotationVelocity;
        ScaleVelocity += ScaleAcceleration;
        Scale += ScaleVelocity;
    }
 
    public abstract void Draw(ref ParticleRendererSettings settings, SpriteBatch spritebatch);
 
    public void RestInPool()
    {
        IsRestingInPool = true;
    }
 
    public virtual void FetchFromPool()
    {
        IsRestingInPool = false;
        ShouldBeRemovedFromRenderer = false;
        AccelerationPerFrame = Vector2.Zero;
        Velocity = Vector2.Zero;
        LocalPosition = Vector2.Zero;
        _texture = null;
        _frame = Rectangle.Empty;
        _origin = Vector2.Zero;
        Rotation = 0f;
        RotationVelocity = 0f;
        RotationAcceleration = 0f;
        Scale = Vector2.Zero;
        ScaleVelocity = Vector2.Zero;
        ScaleAcceleration = Vector2.Zero;
    }
}