koobas.hobune.stream
How do i create lines in scene view??
Hello i am having some trouble with Lists in unity what i am trying to do is create multiple lines in the scene view but i am getting some errors, does anyone know what i am doing wrong?
Here is my code so you know what i have done.
using UnityEngine;
using System.Collections.Generic;
[ExecuteInEditMode]
public class ClickLines : MonoBehaviour {
bool c;
List<Vector3> s = new List<Vector3>();
List<Vector3> e = new List<Vector3>();
void Update()
{
GetInput();
}
void GetInput()
{
if (Input.GetMouseButtonDown(0))
{
Start();
}
else if (Input.GetMouseButtonUp(0))
{
End();
}
}
void Start()
{
c = true;
s = GetPoint();
s.Add(GetPoint);
}
void End()
{
c = false;
e = GetPoint();
}
Vector3 GetPoint()
{
RaycastHit hit;
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
if (Physics.Raycast(ray, out hit))
{
return hit.point;
}
return Vector3.zero;
}
void OnDrawGizmos()
{
Gizmos.DrawLine(s, e);
Gizmos.DrawSphere(s, 0.4f);
Gizmos.color = Color.blue;
Gizmos.DrawSphere(e, 0.4f);
}
}
Looks like to me you're setting up lists of Vector3s, but you are setting that list to a Vector3 - which is not allowed.
Can you explain what you're trying to do?
Posting error messages help identify the problem. I assume it's regarding this :
Gizmos.DrawLine(s, e);
You need to specify the index:
Gizmos.DrawLine(s[0], e[0]);
etc
The errors i get are:
CS1503 (5)
CS0029 (2)
I know i have to specify the index(i forgot to edit the OnDrawGizmos). but how do i add stuff to the list so i can make multiple lines
myList.Add(theItem); // add an item to the end of the List
The wiki did not really help me. I still get the errors with this(what did i do wrong?).
void Start()
{
c = true;
for (int i = 0; i < s.Count; i++)
{
s[i] = GetPoint();
s.Add(GetPoint);
}
}
void End()
{
c = false;
for (int j = 0; j < e.Count; j++)
{
e[j] = GetPoint();
}
}
See the modified script. Note that creating a class containing the start and end of a line is an easier way to reference a "line". This will not work in the editor, you must press play. I am not familiar with creating editor scripts, hopefully this gives you a good idea how to achieve what youre after. Youll have to reference the editor camera rather than the main camera. There are questions already asked that cover that
using UnityEngine;
using System.Collections.Generic;
public class Line
{
public Vector3 start;
public Vector3 end;
public Line(Vector3 s, Vector3 e)
{
start = s;
end = e;
}
}
//[ExecuteInEditMode]
public class ClickLines : MonoBehaviour
{
bool c;
private Vector3 s;
private Vector3 e;
public List<Line> lines = new List<Line>();
//List<Vector3> s = new List<Vector3>();
//List<Vector3> e = new List<Vector3>();
void Update()
{
GetInput();
}
void GetInput()
{
if (Input.GetMouseButtonDown(0))
{
Start();
}
else if (Input.GetMouseButtonUp(0))
{
End();
}
}
void Start()
{
c = true;
s = GetPoint();
}
void End()
{
c = false;
e = GetPoint();
lines.Add(CreateLine());
}
Line CreateLine()
{
Line l = new Line(s, e);
return l;
}
Vector3 GetPoint()
{
RaycastHit hit;
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
if (Physics.Raycast(ray, out hit))
{
return hit.point;
}
return Vector3.zero;
}
void OnDrawGizmos()
{
if (lines.Count > 0)
{
foreach (Line l in lines)
{
Gizmos.color = Color.red;
Gizmos.DrawLine(l.start, l.end);
Gizmos.color = Color.blue;
Gizmos.DrawSphere(l.start, 0.4f);
Gizmos.DrawSphere(l.end, 0.4f);
}
}
}
}
Start is a $$anonymous$$onoBehaviour function, this should really be renamed to something like Begin to avoid confusion and misfiring the function. (I realize this is what the OP named it)
