3D.ru

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

public class BezeerLine : MonoBehaviour
{
    GameObject goPuth;
    public int countWagon = 12;
    public int sizeWagon = 32;
    GameObject wagonPrefab;
    GameObject[] goWagon;
    GameObject relsPrefab;
    float heightWagon = 2.5f;
    Transform[] listPoint;
    List<Vector3> listUniformPoints = new List<Vector3>();
    public float speedWagon = 60;
    float currentPosWagon = 1;
    void Start()
    {
        relsPrefab = new GameObject("rels");
        Vector3[] trans = {new Vector3(-.97f,0,0), new Vector3(0, 0, 0), new Vector3(.1f, .1f, 1),
                            new Vector3(.97f,0,0), new Vector3(0, 0, 0), new Vector3(.1f, .1f, 1),
                            new Vector3(0,0,0),new Vector3(0,0,0),new Vector3(1.5f,.2f,.2f)};
        for (int i = 0; i < trans.Length; i+=3)
        {
            GameObject c = GameObject.CreatePrimitive(PrimitiveType.Cube);
            c.GetComponent<BoxCollider>().enabled = false;
            c.GetComponent<Renderer>().receiveShadows = false;
            c.GetComponent<Renderer>().shadowCastingMode = UnityEngine.Rendering.ShadowCastingMode.Off;
            c.GetComponent<Renderer>().reflectionProbeUsage = UnityEngine.Rendering.ReflectionProbeUsage.Off;
            c.GetComponent<Renderer>().lightProbeUsage = UnityEngine.Rendering.LightProbeUsage.Off;
            c.transform.position = trans[i];
            c.transform.eulerAngles = trans[i + 1];
            c.transform.localScale = trans[i + 2];
            c.transform.parent = relsPrefab.transform;
        }

        wagonPrefab = new GameObject("wagon");
        GameObject kor =  GameObject.CreatePrimitive(PrimitiveType.Cube);
        kor.transform.localScale = new Vector3(2.7f, 3, 15);
        kor.transform.parent = wagonPrefab.transform;
        Vector3[]  transc = {new Vector3(0,-.8f,-.7f), new Vector3(0, 0, 90), new Vector3(.1f, 1.2f, .1f),
                            new Vector3(-.9f,-.8f,-.7f), new Vector3(0, 0, 90), new Vector3(0.95f, .1f, 0.95f),
                            new Vector3(.9f,-.8f,-.7f), new Vector3(0, 0, 90), new Vector3(0.95f, .1f, 0.95f)};
        GameObject t = new GameObject("telega");
        for (int i = 0; i < transc.Length; i+=3)
        {
            GameObject col = GameObject.CreatePrimitive(PrimitiveType.Cylinder);
            col.transform.position = transc[i];
            col.transform.eulerAngles = transc[i + 1];
            col.transform.localScale = transc[i + 2];
            col.transform.parent = t.transform;

        }
        GameObject po = Instantiate(t, new Vector3(0, -1.2f, 5.6f), Quaternion.identity, wagonPrefab.transform);
        po = Instantiate(t, new Vector3(0, -1.2f, 4.11f), Quaternion.identity, wagonPrefab.transform);
        po = Instantiate(t, new Vector3(0, -1.2f, -5.6f), Quaternion.identity, wagonPrefab.transform);
        po = Instantiate(t, new Vector3(0, -1.2f, -4.11f), Quaternion.identity, wagonPrefab.transform);

        goWagon = new GameObject[countWagon];
        goPuth = GameObject.Find("puth");
        listPoint = goPuth.GetComponentsInChildren<Transform>();
        Vector3 vx = Vector3.zero, vy = vx, vz = vx;
        Vector3 vFirstPoint = Vector3.zero;
        Vector3 vSecondPoint = Vector3.zero;
        Vector3 dir = Vector3.zero;
        float distance = 0.5f;
        float currentDistance = 0.5f;
       
        vFirstPoint = goPuth.transform.position;
        for (int i = 0; i < listPoint.Length; i += 2)
        {
            if (listPoint.Length - i > 2)
            {
                vx = new Vector3(listPoint[i].position.x, listPoint[i + 1].position.x, listPoint[i + 2].position.x);
                vy = new Vector3(listPoint[i].position.y, listPoint[i + 1].position.y, listPoint[i + 2].position.y);
                vz = new Vector3(listPoint[i].position.z, listPoint[i + 1].position.z, listPoint[i + 2].position.z);

                for (float it = 0; it <= 1; it += 0.1f)
                {
                    Vector3 tmpPoint = new Vector3(GetPointBezeerLine(vx, it), GetPointBezeerLine(vy, it), GetPointBezeerLine(vz, it));
                    dir = (tmpPoint - vFirstPoint).normalized;
                    while(Vector3.Distance(vFirstPoint, tmpPoint) > currentDistance)
                    {
                        vFirstPoint += dir * distance;
                        listUniformPoints.Add(vFirstPoint);
                    }
                }
            }
            else break;
        }

        vFirstPoint = Vector3.zero;
        for (int i = 0; i < listUniformPoints.Count; i+=1)
        {
            Vector3 pos = listUniformPoints[i];
            GameObject g =  Instantiate(relsPrefab, pos, Quaternion.identity);
            g.transform.LookAt(vFirstPoint, Vector3.up);
            vFirstPoint = g.transform.position;
        }
        for (int i = 0; i < countWagon; i++) goWagon[i] = Instantiate(wagonPrefab);
    }
   
    void Update()
    {
        currentPosWagon += speedWagon * Time.deltaTime;
        if (currentPosWagon > listUniformPoints.Count ) currentPosWagon = 1;
        for (int i = 0; i < countWagon; i++)
        {
            int tmpPos = (int)currentPosWagon - i * sizeWagon;
            if (tmpPos > 0)
            {
                Vector3 pos = listUniformPoints[tmpPos];
                goWagon[i].transform.position = pos;
                goWagon[i].transform.LookAt(listUniformPoints[tmpPos - 1]);
                pos.y += heightWagon;
                goWagon[i].transform.position = pos;
            }
        }
    }

    private void OnDrawGizmos()
    {
        if (!Application.isPlaying)
        {
            Gizmos.color = Color.red;
            goPuth = GameObject.Find("puth");
            if (goPuth == null)
            {
                GameObject g = new GameObject("puth");
                Vector3[] pos = { new Vector3(122, 0, -204), new Vector3(177, -21, 3) , new Vector3(200, -22, 83) , new Vector3(153, -1, 138) ,
                                    new Vector3(86, 0, 193),new Vector3(6, 0, 185), new Vector3(-86,0,175), new Vector3(-129,0,118)};
                for (int i = 0; i < pos.Length; i++)
                {
                    GameObject bezPoint = GameObject.CreatePrimitive(PrimitiveType.Sphere);
                    bezPoint.transform.position = pos[i];
                    bezPoint.transform.parent = g.transform;
                    bezPoint.name = "bezePoint_" + i.ToString();
                }
            }
            else
            {
                Vector3 vx = Vector3.zero, vy = vx, vz = vx;
                listPoint = goPuth.GetComponentsInChildren<Transform>();
                if (listPoint.Length >= 3)
                {
                    for (int i = 0; i < listPoint.Length; i += 2)
                    {
                        if (listPoint.Length - i > 2)
                        {
                            vx = new Vector3(listPoint[i].position.x, listPoint[i + 1].position.x, listPoint[i + 2].position.x);
                            vy = new Vector3(listPoint[i].position.y, listPoint[i + 1].position.y, listPoint[i + 2].position.y);
                            vz = new Vector3(listPoint[i].position.z, listPoint[i + 1].position.z, listPoint[i + 2].position.z);
                           
                            for (float it = 0; it <= 1; it += 0.01f)
                                Gizmos.DrawWireSphere(new Vector3(GetPointBezeerLine(vx, it), GetPointBezeerLine(vy, it), GetPointBezeerLine(vz, it)), .2f);
                        }
                        else break;
                    }
                }
            }
        }
    }

    float GetPointBezeerLine(Vector3 point, float t)
    {
        return (1 - t) * (1 - t) * point.x + 2 * (1 - t) * t * point.y + t * t * point.z;
    }
}