BloodAndGore/Assets/Scripts/Effects/BloodDripper.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace Saltosion.OneWeapon.Effects {
    public class BloodDripper : MonoBehaviour {
        public Vector2 DripOffset = new Vector2(0, -0.5f);
        public int DripCount = 5;
        public float DropInterval = 0.5f;

        private Rigidbody2D ParentBody;
        private int Drips = 0;
        private bool Step = false;
        private float LastDropTime;

        private void Start() {
            ParentBody = transform.parent.GetComponent<Rigidbody2D>();
            DropInterval *= Random.value + 0.5f;
            LastDropTime = Random.value * DropInterval + Time.time;
        }

        private void Update() {
            if (ParentBody.velocity.magnitude > 0.1 && Time.time - LastDropTime > DropInterval) {
                Step = !Step;
                bool WalkingSideWays = Mathf.Abs(Vector2.Dot(ParentBody.velocity, new Vector2(1, 0))) > 0.5;
                Vector2 Offset = DripOffset + new Vector2(-ParentBody.velocity.y, ParentBody.velocity.x).normalized *
                    (WalkingSideWays ? 0.1f : 0.2f) *
                    (Step ? 1f : -1f);
                DebrisLauncher.Splatter(DebrisType.Blood, ParentBody.position + Offset, Vector2.zero, 1 + (int)(Random.value * 5), 0f, 360f, false);
                Drips++;
                if (Drips >= DripCount) {
                    Destroy(gameObject);
                }
                LastDropTime = Time.time;
            }
        }
    }
}