using System.Collections;

using UnityEngine;

namespace ModuleManager.Cats

{

public class CatMover : MonoBehaviour

{

public Vector3 spos;

public float vel = 5;

private float offsetY;

public TrailRenderer trail;

private SpriteRenderer spriteRenderer;

private int totalLenth = 100;

private float activePos = 0;

public float scale = 2;

private const float time = 5;

private const float trailTime = time / 4;

private bool clearTrail = false;

// Use this for initialization

void Start()

{

trail = this.GetComponent<TrailRenderer>();

trail.sortingOrder = 2;

spriteRenderer = this.GetComponent<SpriteRenderer>();

offsetY = Mathf.FloorToInt(0.2f * Screen.height);

spos.z = -1;

totalLenth = (int) (Screen.width / time * trail.time) + 150;

trail.time = trailTime;

trail.widthCurve = new AnimationCurve(new Keyframe(0, trail.startWidth ), new Keyframe(0.7f, trail.startWidth), new Keyframe(1, trail.startWidth * 0.9f));

clearTrail = true;

}

void Update()

{

if (trail.time <= 0f)

{

trail.time = trailTime;

}

activePos += ((Screen.width / time) * Time.deltaTime);

if (activePos > (Screen.width + totalLenth))

{

activePos = -spriteRenderer.sprite.rect.width;

clearTrail = true;

}

float f = 2f * Mathf.PI * (activePos) / (Screen.width * 0.5f);

float heightOffset = Mathf.Sin(f) * (spriteRenderer.sprite.rect.height * scale);

spos.x = activePos;

spos.y = offsetY + heightOffset;

transform.position = KSP.UI.UIMainCamera.Camera.ScreenToWorldPoint(spos);

transform.rotation = Quaternion.Euler(0, 0, Mathf.Cos(f) * 0.25f * Mathf.PI * Mathf.Rad2Deg);

if (clearTrail)

{

trail.Clear();

clearTrail = false;

}

}

}

}