55 lines
1.3 KiB
C#
55 lines
1.3 KiB
C#
using System;
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using Microsoft.Xna.Framework;
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namespace SpacePew.ParticleSystem
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{
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public class Particle
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{
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private static readonly Random _random = new Random();
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private float RandomBetween(float min, float max)
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{
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return min + (float)_random.NextDouble() * (max - min);
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}
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public Vector2 Position;
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public Vector2 Velocity;
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public Vector2 Acceleration;
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public float Scale { get; set; }
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public float Lifetime { get; private set; }
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public float TimeSinceStart { get; private set; }
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public float Rotation { get; private set; }
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public float RotationSpeed { get; private set; }
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public bool Active
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{
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get { return TimeSinceStart < Lifetime; }
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}
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public void Initialize(Vector2 position, Vector2 velocity, Vector2 acceleration, float lifetime, float scale, float rotationSpeed)
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{
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this.Position = position;
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this.Velocity = velocity;// *this.Scale;
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this.Acceleration = acceleration;
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this.Lifetime = lifetime * this.Scale;
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this.Scale = scale * this.Scale;
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this.RotationSpeed = rotationSpeed;
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this.TimeSinceStart = 0.0f;
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this.Rotation = RandomBetween(0, MathHelper.TwoPi);
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}
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public void Update(float dt)
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{
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Velocity += Acceleration * dt;
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Position += Velocity * dt;
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Rotation += RotationSpeed * dt;
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TimeSinceStart += dt;
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}
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}
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} |