游戲對象與lineRender碰撞時如何檢測碰撞？

Question

我想通過拖動鼠標畫一些線。 我用這個腳本做到了。

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

public class DrawLine : MonoBehaviour 
{
    private LineRenderer line;
    private bool isMousePressed;
    private List<Vector3> pointsList;
    private Vector3 mousePos;

    // Structure for line points
    struct myLine
    {
        public Vector3 StartPoint;
        public Vector3 EndPoint;
    };
    //  ----------------------------------- 
    void Awake()
    {
        // Create line renderer component and set its property
        line = gameObject.AddComponent<LineRenderer>();
        line.material =  new Material(Shader.Find("Particles/Additive"));
        line.SetVertexCount(0);
        line.SetWidth(0.1f,0.1f);
        line.SetColors(Color.green, Color.green);
        line.useWorldSpace = true;  
        isMousePressed = false;
        pointsList = new List<Vector3>();
//      renderer.material.SetTextureOffset(
    }
    //  ----------------------------------- 
    void Update () 
    {
        // If mouse button down, remove old line and set its color to green
        if(Input.GetMouseButtonDown(0))
        {
            isMousePressed = true;
            line.SetVertexCount(0);
            //pointsList.RemoveRange(0,pointsList.Count);
            line.SetColors(Color.green, Color.green);
        }
        else if(Input.GetMouseButtonUp(0))
        {
            isMousePressed = false;
        }
        // Drawing line when mouse is moving(presses)
        if(isMousePressed)
        {
            mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
            mousePos.z=0;
            if (!pointsList.Contains (mousePos)) 
            {
                pointsList.Add (mousePos);
                line.SetVertexCount (pointsList.Count);
                line.SetPosition (pointsList.Count - 1, (Vector3)pointsList [pointsList.Count - 1]);
                if(isLineCollide())
                {
                    isMousePressed = false;
                    line.SetColors(Color.red, Color.red);
                }
            }
        }
    }
    //  ----------------------------------- 
    //  Following method checks is currentLine(line drawn by last two points) collided with line 
    //  ----------------------------------- 
    private bool isLineCollide()
    {
            //  if (gameObject.tag == "default") {

                        if (pointsList.Count < 2)
                                return false;
                        int TotalLines = pointsList.Count - 1;
                        myLine[] lines = new myLine[TotalLines];
                        if (TotalLines > 1) {
                                for (int i = 0; i < TotalLines; i++) {
                                        lines [i].StartPoint = (Vector3)pointsList [i];
                                        lines [i].EndPoint = (Vector3)pointsList [i + 1];
                                }
                        }
                        for (int i = 0; i < TotalLines - 1; i++) {
                                myLine currentLine;
                                currentLine.StartPoint = (Vector3)pointsList [pointsList.Count - 2];
                                currentLine.EndPoint = (Vector3)pointsList [pointsList.Count - 1];
                                if (isLinesIntersect (lines [i], currentLine))
                                        return true;
                        }
            //  }
        return false;
    }

    //  ----------------------------------- 
    //  Following method checks whether given two points are same or not
    //  ----------------------------------- 
    private bool checkPoints (Vector3 pointA, Vector3 pointB)
    {
        return (pointA.x == pointB.x && pointA.y == pointB.y);
    }
    //  ----------------------------------- 
    //  Following method checks whether given two line intersect or not
    //  ----------------------------------- 
    private bool isLinesIntersect (myLine L1, myLine L2)
    {
        if (checkPoints (L1.StartPoint, L2.StartPoint) ||
            checkPoints (L1.StartPoint, L2.EndPoint) ||
            checkPoints (L1.EndPoint, L2.StartPoint) ||
            checkPoints (L1.EndPoint, L2.EndPoint))
            return false;

        return((Mathf.Max (L1.StartPoint.x, L1.EndPoint.x) >= Mathf.Min (L2.StartPoint.x, L2.EndPoint.x)) &&
               (Mathf.Max (L2.StartPoint.x, L2.EndPoint.x) >= Mathf.Min (L1.StartPoint.x, L1.EndPoint.x)) &&
               (Mathf.Max (L1.StartPoint.y, L1.EndPoint.y) >= Mathf.Min (L2.StartPoint.y, L2.EndPoint.y)) &&
               (Mathf.Max (L2.StartPoint.y, L2.EndPoint.y) >= Mathf.Min (L1.StartPoint.y, L1.EndPoint.y)) 
               );
    }
}

現在在此處輸入圖像描述當我的線與場景中的某些游戲對象碰撞時如何打印？ 這意味着當線與我的游戲對象碰撞時，我想說的是轉到另一個場景。

Answer 1

您可以在Update方法中使用從LastPosition到CurrentPosition的Raycast。 https://docs.unity3d.com/ScriptReference/Physics.Raycast.html示例： http : //xenforo.unity3d.com/threads/general-purpose-method-for-better-collision-solving.64781/