ParticleEmitter.cs

using System.Drawing;
using SkiaSharp;
 
namespace Gondwana.Drawing.Direct.Particles;

public sealed class ParticleEmitter
{
    public PointF Position { get; set; }

    public float EmitRate { get; set; } = 200f;

    public (float Min, float Max) LifeRange { get; set; } = (0.6f, 1.4f);

    public (float Min, float Max) VelocityRangeX { get; set; } = (-120f, 120f);

    public (float Min, float Max) VelocityRangeY { get; set; } = (-300f, -180f);

    public (float Min, float Max) SizeRange { get; set; } = (3f, 7f);

    public SKColor Color { get; set; } = new SKColor(200, 200, 255, 255);

    public SKBlendMode BlendMode { get; set; } = SKBlendMode.Plus;

    public float JitterX { get; set; } = 0f;

    public float JitterY { get; set; } = 0f;

    public float? GravityX { get; set; } = null;

    public float? GravityY { get; set; } = null;

    public SKBitmap? ParticleSprite { get; set; }

    public SKColor? Tint { get; set; }

    public float? MaxVelocity { get; set; }

    public ParticleSpawnDistribution SpawnDistribution { get; set; } = ParticleSpawnDistribution.Rectangle;

    public float RingInnerRadius01 { get; set; } = 0.85f;

    public float GaussianStdDev01 { get; set; } = 0.33f;

    public ParticleSpawnHandler? OnSpawn { get; set; }

    public Action<ParticleEmitter, float>? OnUpdate { get; set; }
 
    // Internal accumulator to handle fractional emit per frame.
    internal float _accumulator;
}