Develop Reference

How to destroy a line when line renderer is used in Unity?

So I only want one line on screen at a time. I would like to destroy the current line when a ball collides or another line is drawn. Here is my code so far. It creates a line renderer with two points, adds a Box collider. I've tried making a loop and setting the vector points back to zero.
Every time I add a OnCollisonEnter2D I cannot get the Line to register that it hit a ball. In the Ball script I can get the Log to print Hit when the Ball hits the collider.
using System.Runtime.CompilerServices;
using UnityEditor.SceneManagement;
using UnityEngine;
using UnityEngine.UI;
public class Player1 : MonoBehaviour
{
private LineRenderer line; // Reference to LineRenderer
private Vector3 mousePos;
public Vector3 startPos; // Start position of line
public Vector3 endPos; // End position of line
void Update()
{
GetLine(); // On mouse down new line will be created
}
private void GetLine()
{
if (Input.GetMouseButtonDown(0))
{
if (line == null)
CreateLine();
SetFirstPos();
}
else if (Input.GetMouseButtonUp(0))
{
if (line)
{
SetSecondPos();
AddColliderToLine();
line = null;
}
}
else if (Input.GetMouseButton(0))
{
if (line)
{
mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
mousePos.z = 0;
line.SetPosition(1, mousePos);
}
}
}
// Following method creates line runtime using Line Renderer component
private void CreateLine()
{
line = new GameObject("Line").AddComponent<LineRenderer>();
line.positionCount = 2;
line.numCapVertices = 2;
line.startWidth = .25f;
line.endWidth = .25f;
line.startColor = Color.black;
line.endColor = Color.black;
line.useWorldSpace = true;
}
// Following method adds collider to created line
private void AddColliderToLine()
{
BoxCollider2D col = new GameObject("Collider").AddComponent<BoxCollider2D>();
col.transform.parent = line.transform; // Collider is added as child object of line
float lineLength = Vector3.Distance(startPos, endPos);// length of line
lineLength.ToString();
col.size = new Vector3(lineLength, 0.25f, 1f); // size of collider is set where X is length of
line, Y is width of line, Z will be set as per requirement
Vector3 midPoint = (startPos + endPos) / 2;
col.transform.position = midPoint; // setting position of collider object
// Following lines calculate the angle between startPos and endPos
float angle = (Mathf.Abs(startPos.y - endPos.y) / Mathf.Abs(startPos.x - endPos.x));
if ((startPos.y < endPos.y && startPos.x > endPos.x) || (endPos.y < startPos.y && endPos.x >
startPos.x))
{
angle *= -1;
}
angle = Mathf.Rad2Deg * Mathf.Atan(angle);
col.transform.Rotate(0, 0, angle);
}
//Sets the first position
private void SetFirstPos()
{
mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
mousePos.z = 0;
line.SetPosition(0, mousePos);
startPos = mousePos;
Debug.Log("Line");
}
//Sets the second position
private void SetSecondPos()
{
mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
mousePos.z = 0;
line.SetPosition(1, mousePos);
endPos = mousePos;
}
//Cannot get it to Log Hit. Line show up in the Hierarchy.
private void OnCollisionEnter2D(Collision2D collision)
{
if(collision.gameobject.name =="Line")
{
Debug.Log("Hit!");
}
}
}

If your OnCollisionEnter2D gets called why don't you use just use it?
private void OnCollisionEnter2D(Collision2D collision)
{
if(collision.gameObject.name =="Line")
{
Debug.Log("Hit!");
// destroy the hit line
GameObject.Destroy(collision.gameObject);
}
}
If you want the line to be destroyed once a new one gets created you have to store it and destroy it manually:
public class Player1 : MonoBehaviour
{
private GameObject lastLine;
[...]
private void GetLine()
{
if (Input.GetMouseButtonDown(0))
{
if(lastLine != null)
{
GameObject.Destroy(lastLine);
}
if (line == null)
CreateLine();
SetFirstPos();
}
else if (Input.GetMouseButtonUp(0))
{
if (line)
{
SetSecondPos();
AddColliderToLine();
lastLine = line.gameObject;
line = null;
}
}
[...]
}

Unity3d drawing with whitespaces

I drew lines using LineRenderer. Game is 2d. What I want now is to create whitespace in line with the line on the gameobject with collider.
Here is the code I use for drawing and adding collider to line. What I want is not to draw a line on gameobjects, like circles(with CircleCollider2D) or squares(with BoxCollider2D). I want to have two different LineRenderers: one is finishing on collider, second is starting on it. What I'm trying to achieve That square does not hide the line. There is not a line where the square is.
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System;
public class DrawLine : MonoBehaviour
{
private LineRenderer line;
private bool isMousePressed;
public bool isLeftMousePressed = false;
public List<Vector3> pointsList;
private Vector3 mousePos;
public float width = 0.05f;
// 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 = (Material)Resources.Load("Materials/LineMat");
line.startWidth = width;
line.endWidth = width;
line.useWorldSpace = true;
isMousePressed = false;
pointsList = new List<Vector3>();
}
// -----------------------------------
void Update()
{
if (Input.GetMouseButtonDown(1))
{
isLeftMousePressed = true;
}
if (isLeftMousePressed||Game.currentLevel == 0) return;
if (Input.GetMouseButton(0))
{
isMousePressed = true;
}
// Drawing line when mouse is moving(pressed)
if (isMousePressed)
{
if (Input.GetMouseButtonUp(0))
{
isMousePressed = false;
GameObject curve = (GameObject)Instantiate(Resources.Load("Curve"), transform.parent);
curve.GetComponent<DrawLine>().width = width;
if (line.GetPosition(line.positionCount - 1).z == 1) Destroy(gameObject);
else enabled = false;
}
mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
mousePos.z = 0;
if (!pointsList.Contains(mousePos))
{
pointsList.Add(mousePos);
line.positionCount = pointsList.Count;
line.SetPosition(pointsList.Count - 1, (Vector3)pointsList[pointsList.Count - 1]);
try
{
AddColliderToLine(line, (Vector3)pointsList[pointsList.Count - 2], (Vector3)pointsList[pointsList.Count - 1]);
}
catch(Exception e)
{
}
}
}
}
// -----------------------------------
// 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);
}
private void AddColliderToLine(LineRenderer line, Vector3 startPoint, Vector3 endPoint)
{
//create the collider for the line
GameObject lcObject = new GameObject("LineCollider");
BoxCollider2D lineCollider = lcObject.AddComponent<BoxCollider2D>();
lcObject.layer = 2; // ignore raycast
//set the collider as a child of your line
lineCollider.transform.parent = line.transform;
// get width of collider from line
float lineWidth = line.endWidth;
// get the length of the line using the Distance method
float lineLength = Vector3.Distance(startPoint, endPoint);
// size of collider is set where X is length of line, Y is width of line
//z will be how far the collider reaches to the sky
lineCollider.size = new Vector3(lineLength, lineWidth);
// get the midPoint
Vector3 midPoint = (startPoint + endPoint) / 2;
// move the created collider to the midPoint
lineCollider.transform.position = midPoint;
//heres the beef of the function, Mathf.Atan2 wants the slope, be careful however because it wants it in a weird form
//it will divide for you so just plug in your (y2-y1),(x2,x1)
float angle = Mathf.Atan2((endPoint.y - startPoint.y), (endPoint.x - startPoint.x));
// angle now holds our answer but it's in radians, we want degrees
// Mathf.Rad2Deg is just a constant equal to 57.2958 that we multiply by to change radians to degrees
angle *= Mathf.Rad2Deg;
//were interested in the inverse so multiply by -1
//angle *= -1;
// now apply the rotation to the collider's transform, carful where you put the angle variable
// in 3d space you don't wan't to rotate on your y axis
lineCollider.transform.Rotate(0, 0, angle);
}
}

If you want to make dotted line, you can see 2D Dotted LineRenderer
And add the collider on the part you want
gameObject.AddComponent<PolygonCollider2D>();
Edit:
Check if mouse is inside the square by raycast
if (isMousePressed)
{
var stopDrawing = false;
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
if (Physics.Raycast(ray, out hit))
{
if(hit.transform.tag == "square" || hit.transform.tag == "circle") {
stopDrawing = true;
}
}
if(stopDrawing)
{
// Stop current line, prepare a new List<Vector3> for next line
}
else{
// Continue draw current line
}
}

Unity 2D: How to collide with side of screen

I'm working currently at a 2D Game for Android. There is a player in my scene and if the user tilts his device the player Object is moving on the ground. But he is just moving out of the screen at the left and the right side. I tried to make a "wall" but I had no success. At my player-Gameobject there is an edge collider. Now my question is: how can my player gameobject collide with the side of the screen?
This is my code:
public GameObject player;
// Use this for initialization
void Start () {
}
// Update is called once per frame
void Update () {
Vector3 dir = Vector3.zero;
dir.y = Input.acceleration.x;
player.transform.Translate(new Vector2(dir.y, 0) * Time.deltaTime * 2000f);
}
Thank you very much! :)
Jul
EDIT:
Image 1 is my Wall's and Image 2 my Player's.
I'm trying to solve it with a wall at the side of the screen. These are the images of
Solved
Solution code:
Vector3 position = player.transform.position;
translation = Input.acceleration.x * movementSpeed * 50f;
if (player.transform.position.x + translation < LeftlimitScreen)
{
position.x = -LeftlimitScreen;
}
else if(transform.position.x + translation > RightlimitScreen)
{
position.x = RightlimitScreen;
}
else
{
position.x += translation;
player.transform.position = position;
}
This code is working for me! :)

This will generate edge colliders around the screen (for 2d):
void GenerateCollidersAcrossScreen()
{
Vector2 lDCorner = camera.ViewportToWorldPoint(new Vector3(0, 0f, camera.nearClipPlane));
Vector2 rUCorner = camera.ViewportToWorldPoint(new Vector3(1f, 1f, camera.nearClipPlane));
Vector2[] colliderpoints;
EdgeCollider2D upperEdge = new GameObject("upperEdge").AddComponent<EdgeCollider2D>();
colliderpoints = upperEdge.points;
colliderpoints[0] = new Vector2(lDCorner.x, rUCorner.y);
colliderpoints[1] = new Vector2(rUCorner.x, rUCorner.y);
upperEdge.points = colliderpoints;
EdgeCollider2D lowerEdge = new GameObject("lowerEdge").AddComponent<EdgeCollider2D>();
colliderpoints = lowerEdge.points;
colliderpoints[0] = new Vector2(lDCorner.x, lDCorner.y);
colliderpoints[1] = new Vector2(rUCorner.x, lDCorner.y);
lowerEdge.points = colliderpoints;
EdgeCollider2D leftEdge = new GameObject("leftEdge").AddComponent<EdgeCollider2D>();
colliderpoints = leftEdge.points;
colliderpoints[0] = new Vector2(lDCorner.x, lDCorner.y);
colliderpoints[1] = new Vector2(lDCorner.x, rUCorner.y);
leftEdge.points = colliderpoints;
EdgeCollider2D rightEdge = new GameObject("rightEdge").AddComponent<EdgeCollider2D>();
colliderpoints = rightEdge.points;
colliderpoints[0] = new Vector2(rUCorner.x, rUCorner.y);
colliderpoints[1] = new Vector2(rUCorner.x, lDCorner.y);
rightEdge.points = colliderpoints;
}

You can place in your scene, outside of the region which will be displayed in your device 2 empty game objects with a collider, so the player will crash against them.
You can also limit by code the boundaries within the player can move. You apply this using Mathf.Clamp(), and there you will need to set the boundaries in the x coordinate for your scene.
You will see that instead of modifying the position of the player using its transform, we use the rigidbody instead.
public class PlayerController : MonoBehaviour
{
public float speed;
public float tilt;
public Boundary boundary;
void FixedUpdate ()
{
float moveHorizontal = Input.GetAxis ("Horizontal");
float moveVertical = Input.GetAxis ("Vertical");
Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);
rigidbody.velocity = movement * speed;
rigidbody.position = new Vector3
(
Mathf.Clamp (rigidbody.position.x, boundary.xMin, boundary.xMax),
0.0f,
5.0f
);
}
}
You can check the whole tutorial here: https://unity3d.com/earn/tutorials/projects/space-shooter/moving-the-player?playlist=17147
Update Other options:
//You select here the speed you consider
float speed = 1.0f;
void Update () {
Vector3 dir = Vector3.zero;
float InputValue = Input.acceleration.x * speed;
//You need to set the values for this limits (max and min) based on your scene
dir.y = Mathf.Clamp(InputValue, 0.5f, 50.5f);
player.transform.position = dir;
}
Update 2:
Without Clamp, just setting the limits on the script
void Update () {
Vector3 position = player.transform.position ;
translation = Input.acceleration.x * speed;
if( player.transform.position.y + translation < leftLimitScreen )
position.y = -leftLimitScreen ;
else if( myTransform.position.x + translation > rightLimitScreen )
position.y = rightLimitScreen ;
else
position.y += translation ;
player.transform.position = position ;
}

In a prototype i'm creating the solution i had arrived was creating "walls" with objects without sprites in the borders and checking if there is something there with Raycast with a script like this:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PlayerController : MonoBehaviour {
RaycastHit2D[] hit;
Vector2[] directions;
private Vector2 targetPosition;
private float moveSpeed;
private float moveHDir;
private float wallPos;
private bool hitLeft;
private bool hitRight;
// Use this for initialization
void Start () {
directions = new Vector2[2] {Vector2.right, Vector2.left};
hitLeft = false;
hitRight = false;
}
// Update is called once per physics timestamp
void FixedUpdate () {
foreach (Vector2 dir in directions) {
hit = Physics2D.RaycastAll(transform.position, dir);
Debug.DrawRay(transform.position, dir);
if (hit[1].collider != null) {
// Keyboard control
if (Input.GetAxisRaw("Horizontal") != 0) {
moveHDir = Input.GetAxisRaw("Horizontal");
// I have found that a 5% of the size of the object it's a
// good number to set as a minimal distance from the obj to the borders
if (hit[1].distance <= (transform.localScale.x * 0.55f)) {
if (dir == Vector2.left) {
hitLeft = true;
} else {
hitRight = true;
}
wallPos = hit[1].collider.transform.position.x;
// Condition that guarantee that the paddle do not pass the borders of the screen
// but keeps responding if you try to go to the other side
if ((wallPos > this.transform.position.x && moveHDir < 0) ||
(wallPos < this.transform.position.x && moveHDir > 0)) {
moveSpeed = gControl.initPlayerSpeed;
} else {
moveSpeed = 0;
}
} else {
if (dir == Vector2.left) {
hitLeft = false;
} else {
hitRight = false;
}
if (!hitRight && !hitLeft)
{
moveSpeed = gControl.initPlayerSpeed;
}
}
}
}
}
targetPosition = new Vector2((transform.position.x + (moveSpeed * moveHDir)), transform.position.y);
}
}
Maybe it's not the best solution or the shortest one, but it's working wonders to me.
Good luck.

In case if you want to generate collider on the borders of the canvas (2D)
Attach this script in the main canvas object.
using UnityEngine;
public class BorderCollider: MonoBehaviour
{
private EdgeCollider2D _edgeCollider2D;
private Rigidbody2D _rigidbody2D;
private Canvas _canvas;
private float y, x;
private Vector2 _topLeft, _topRight, _bottomLeft, _bottomRight;
private void Start() {
//Adding Edge Collider
_edgeCollider2D = gameObject.AddComponent<EdgeCollider2D>();
//Adding Rigid body as a kinematic for collision detection
_rigidbody2D = gameObject.AddComponent<Rigidbody2D>();
_rigidbody2D.bodyType = RigidbodyType2D.Kinematic;
//Assigning canvas
_canvas = GetComponent<Canvas>();
GetCanvasDimension(); // Finds height and width fo the canvas
GetCornerCoordinate(); // Finds co-ordinate of the corners as a Vector2
DrawCollider(); // Draws Edge collide around the corners of canvas
}
public void GetCornerCoordinate() {
// Assign corners coordinate in the variables
_topLeft = new Vector2(-x,y); // Top Left Corner
_topRight = new Vector2(x,y); // Top Right Corner
_bottomLeft = new Vector2(-x,-y); // Bottom Left Corner
_bottomRight = new Vector2(x,-y); // Bottom Right Corner
}
void GetCanvasDimension(){
y = (_canvas.GetComponent<RectTransform>().rect.height) / 2;
x = (_canvas.GetComponent<RectTransform>().rect.width) / 2;
}
void DrawCollider() {
_edgeCollider2D.points = new[] {_topLeft, _topRight, _bottomRight, _bottomLeft,_topLeft};
}
}

Unity: Cant switch a scroll panel to vertical instead of horizontal?

Ok, I am having a problem with a Unity scroll panel in C#. I downloaded this character picker that consists of a script attached to a scroll panel from here:
https://www.youtube.com/watch?v=YBsGhYuTavA
It works very well but problem is I cant make it scroll vertically instead of horizontal. I have checked the "vertical" boolean instead of horizontal on the actual scroll panel then in the script I have changed the places that based off x values to y values.
I commented where, here is the script:
float[] distance;
bool dragging = false;
int minButtonNum;
int currentSelectedPly = -1;
public float objectScale = 1.7f;
public int bttnDistance = 300;
void OnEnable() {
//txtGeneralCash.text = "" + PlayerPrefs.GetInt ("money", 0);
}
void Start(){
distance = new float[prefab.Length];
//instatiate the prefab
for(int i=0; i<prefab.Length;i++){
prefab[i] = Instantiate(prefab[i],center.transform.position,camInUse.transform.rotation) as GameObject;
prefab [i].transform.SetParent(panel.transform);
Vector3 pos = prefab[i].GetComponent<RectTransform>().anchoredPosition;
pos.x += (i * bttnDistance); //**CHANGED TO POS.Y
prefab [i].GetComponent<RectTransform> ().anchoredPosition = pos;
}
}
void Update(){
//calculate the relative distance
for(int i=0;i<prefab.Length;i++){
distance [i] = Mathf.Abs (center.transform.position.x - prefab [i].transform.position.x); //CHANGED THESE TO .Y
}
float minDistance = Mathf.Min (distance);
// Aplly the scale to object
for(int a=0;a<prefab.Length;a++){
if (minDistance == distance [a]) {
minButtonNum = a;
//this is when each char is selected !!!!!!!!!!!!!!!
if(minButtonNum != currentSelectedPly){
//lookAtPrice (minButtonNum);
scaleButtonCenter (minButtonNum);
currentSelectedPly = minButtonNum;
txtName.text = prefab [minButtonNum].GetComponent<CharacterProperty> ().nameObj;
bgMat.color = prefab [minButtonNum].GetComponent<CharacterProperty> ().color;
}
}
}
// if the users aren't dragging the lerp function is called on the prefab
if(!dragging){
LerpToBttn (currentSelectedPly* (-bttnDistance));
}
}
/*
* Lerp the nearest prefab to center
*/
void LerpToBttn(int position){
float newX = Mathf.Lerp (panel.anchoredPosition.x,position,Time.deltaTime*7f); //CHANGED TO .Y
Vector2 newPosition = new Vector2 (newX,panel.anchoredPosition.y);
panel.anchoredPosition = newPosition;
}
/*
* Set the scale of the prefab on center to 2, other to 1
*/
public void scaleButtonCenter (int minButtonNum){
for (int a = 0; a < prefab.Length; a++) {
if (a == minButtonNum) {
StartCoroutine (ScaleTransform(prefab [a].transform,prefab [a].transform.localScale,new Vector3 (objectScale,objectScale,objectScale)));
} else {
StartCoroutine (ScaleTransform(prefab [a].transform,prefab [a].transform.localScale,new Vector3 (1f, 1f, 1f)));
}
}
}
/*
* If the prefab is not free, show the price button
/*
* Courutine for change the scale
*/
IEnumerator ScaleTransform(Transform transformTrg,Vector3 initScale,Vector3 endScale){
float completeTime = 0.2f;//How much time will it take to scale
float currentTime = 0.0f;
bool done = false;
while (!done){
float percent = currentTime / completeTime;
if (percent >= 1.0f){
percent = 1;
done = true;
}
transformTrg.localScale = Vector3.Lerp(initScale, endScale, percent);
currentTime += Time.deltaTime;
yield return new WaitForEndOfFrame();
}
}
/*
* Called by the canvas, set dragging to true for preventing lerp when users are dragging
*/
public void StartDrag(){
dragging = true;
}
/*
* Called by the canvas, set dragging to true for preventing lerp when users are dragging
*/
public void EndDrag(){
dragging = false;
}
/*
* Called when character is selected, it change the player model
*/
public void CharacterSelected(){
bool oneEnable = false;
string nameSelected = prefab [currentSelectedPly].GetComponent<CharacterProperty> ().name;
nameSelected = nameSelected.Split('(')[0];
GameObject player = GameObject.Find ("CharactersPlayer");
if(player != null){
foreach (Transform child in player.transform) {
if (child.gameObject.name == nameSelected) {
child.gameObject.SetActive (true);
oneEnable = true;
PlayerPrefs.SetString ("SelectedPlayer", nameSelected);
} else {
child.gameObject.SetActive (false);
}
}
// if no one was selected
if (oneEnable == false) {
player.transform.GetChild (0).gameObject.SetActive (true);
}
}
}
Ive gone through it several times and I don't know why just changing the values from .x to .y does not work. I get a bunch of glitching and the characters do stack up vertically, but they move off the screen when i try to scroll.
How can I fix this?

How to Detect Collision when a gameobject collide with a lineRender?

I want to draw some lines by dragging the mouse. I did that using this script .
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))
);
}
}
enter image description here
Now How to print something when my line collide with some gameobjects in the scene???
It means that when the line collide with my gameobject i want to say go to another scene.

You may use Raycast from LastPosition to CurrentPosition in Update method.
https://docs.unity3d.com/ScriptReference/Physics.Raycast.html
Example:
http://xenforo.unity3d.com/threads/general-purpose-method-for-better-collision-solving.64781/