![alt text][1]
Hello, I followed this tutorial => Field of view visualisation (E02) - YouTube
only I modified it for 2D instead and i’am having issues with the way the mesh is being displayed and positioned
I am trying to get the purple mesh cone to follow the mouse the same way as the Handles.DrawWireArc
It works the way I want in pictures 1 and 2, however if the mouse is at any other angle other than at the top or bottom the purple mesh cone appears at the other side.
I am very new to drawing meshes and don’t really understand which part of the code is wrong, I believe it may be part of this code that is causing my issue, however I am unsure
void DrawFieldOfView()
{
int stepCount = Mathf.RoundToInt(viewAngle * meshResolution);
float stepAngleSize = viewAngle / stepCount;
List<Vector3> viewPoints = new List<Vector3>();
ViewCastInfo oldViewCast = new ViewCastInfo();
for (int i = 0; i <= stepCount; i++)
{
float angle = transform.eulerAngles.z - viewAngle / 2 + stepAngleSize * i;
ViewCastInfo newViewCast = ViewCast(angle);
if (i > 0)
{
bool edgeDstThresholdExceeded = Mathf.Abs(oldViewCast.dst - newViewCast.dst) > edgeDstThreshold;
if (oldViewCast.hit != newViewCast.hit || (oldViewCast.hit && newViewCast.hit && edgeDstThresholdExceeded))
{
EdgeInfo edge = FindEdge(oldViewCast, newViewCast);
if (edge.pointA != Vector3.zero)
{
viewPoints.Add(edge.pointA);
}
if (edge.pointB != Vector3.zero)
{
viewPoints.Add(edge.pointB);
}
}
}
viewPoints.Add(newViewCast.point);
oldViewCast = newViewCast;
}
int vertexCount = viewPoints.Count + 1;
Vector3[] vertices = new Vector3[vertexCount];
int[] triangles = new int[(vertexCount - 2) * 3];
vertices[0] = Vector3.zero;
for (int i = 0; i < vertexCount - 1; i++)
{
vertices[i + 1] = transform.InverseTransformPoint(viewPoints*);*
-
if (i < vertexCount - 2)* -
{*
_ triangles[i * 3] = 0;_
_ triangles[i * 3 + 1] = i + 1;_
_ triangles[i * 3 + 2] = i + 2;_
-
}* -
}* -
viewMesh.Clear();* -
viewMesh.vertices = vertices;* -
viewMesh.triangles = triangles;* -
viewMesh.RecalculateNormals();* -
}*
Thank you for taking the time to look at my post xxxx
Full mesh cone script:
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
public class PlayerAimingScript : MonoBehaviour
{
-
public float viewRadius;*
-
[Range(0, 360)]*
-
public float viewAngle;*
-
public LayerMask targetMask;*
-
public LayerMask obstacleMask;*
-
[HideInInspector]*
-
public List visibleTargets = new List();*
-
public float meshResolution;*
-
public int edgeResolveIterations;*
-
public float edgeDstThreshold;*
-
public MeshFilter viewMeshFilter;*
-
Mesh viewMesh;*
-
void Start()*
-
{*
-
viewMesh = new Mesh();* -
viewMesh.name = "View Mesh";* -
viewMeshFilter.mesh = viewMesh;* -
}*
-
void LateUpdate()*
-
{*
-
DrawFieldOfView();* -
}*
-
void DrawFieldOfView()*
-
{*
_ int stepCount = Mathf.RoundToInt(viewAngle * meshResolution);_ -
float stepAngleSize = viewAngle / stepCount;* -
List<Vector3> viewPoints = new List<Vector3>();* -
ViewCastInfo oldViewCast = new ViewCastInfo();* -
for (int i = 0; i <= stepCount; i++)* -
{*
_ float angle = transform.eulerAngles.z - viewAngle / 2 + stepAngleSize * i;_
-
ViewCastInfo newViewCast = ViewCast(angle);* -
if (i > 0)* -
{* -
bool edgeDstThresholdExceeded = Mathf.Abs(oldViewCast.dst - newViewCast.dst) > edgeDstThreshold;* -
if (oldViewCast.hit != newViewCast.hit || (oldViewCast.hit && newViewCast.hit && edgeDstThresholdExceeded))* -
{* -
EdgeInfo edge = FindEdge(oldViewCast, newViewCast);* -
if (edge.pointA != Vector3.zero)* -
{* -
viewPoints.Add(edge.pointA);* -
}* -
if (edge.pointB != Vector3.zero)* -
{* -
viewPoints.Add(edge.pointB);* -
}* -
}* -
}* -
viewPoints.Add(newViewCast.point);* -
oldViewCast = newViewCast;* -
}* -
int vertexCount = viewPoints.Count + 1;* -
Vector3[] vertices = new Vector3[vertexCount];*
_ int triangles = new int[(vertexCount - 2) * 3];_
-
vertices[0] = Vector3.zero;* -
for (int i = 0; i < vertexCount - 1; i++)* -
{*
_ vertices[i + 1] = transform.InverseTransformPoint(viewPoints*);*_
* if (i < vertexCount - 2)*
* {*
_ triangles[i * 3] = 0;
triangles[i * 3 + 1] = i + 1;
triangles[i * 3 + 2] = i + 2;_
* }*
* }*
* viewMesh.Clear();*
* viewMesh.vertices = vertices;*
* viewMesh.triangles = triangles;*
* viewMesh.RecalculateNormals();*
* }*
* EdgeInfo FindEdge(ViewCastInfo minViewCast, ViewCastInfo maxViewCast)*
* {*
* float minAngle = minViewCast.angle;*
* float maxAngle = maxViewCast.angle;*
* Vector3 minPoint = Vector3.zero;*
* Vector3 maxPoint = Vector3.zero;*
* for (int i = 0; i < edgeResolveIterations; i++)*
* {*
* float angle = (minAngle + maxAngle) / 2;*
* ViewCastInfo newViewCast = ViewCast(angle);*
* bool edgeDstThresholdExceeded = Mathf.Abs(minViewCast.dst - newViewCast.dst) > edgeDstThreshold;*
* if (newViewCast.hit == minViewCast.hit && !edgeDstThresholdExceeded)*
* {*
* minAngle = angle;*
* minPoint = newViewCast.point;*
* }*
* else*
* {*
* maxAngle = angle;*
* maxPoint = newViewCast.point;*
* }*
* }*
* return new EdgeInfo(minPoint, maxPoint);*
* }*
* ViewCastInfo ViewCast(float globalAngle)*
* {*
* Vector3 dir = DirFromAngle(globalAngle, true);*
* RaycastHit hit;*
* if (Physics.Raycast(transform.position, dir, out hit, viewRadius, obstacleMask))*
* {*
* return new ViewCastInfo(true, hit.point, hit.distance, globalAngle);*
* }*
* else*
* {*
_ return new ViewCastInfo(false, transform.position + dir * viewRadius, viewRadius, globalAngle);_
* }*
* }*
* public Vector2 DirFromAngle(float angleInDegrees, bool angleIsGlobal)*
* {*
* if (!angleIsGlobal)*
* {*
* angleInDegrees -= transform.eulerAngles.z;*
* }*
_ return new Vector2(Mathf.Sin(angleInDegrees * Mathf.Deg2Rad), Mathf.Cos(angleInDegrees * Mathf.Deg2Rad));_
* }*
* public struct ViewCastInfo*
* {*
* public bool hit;*
* public Vector3 point;*
* public float dst;*
* public float angle;*
* public ViewCastInfo(bool _hit, Vector3 _point, float _dst, float angle)
_ {*
* hit = _hit;
point = _point;
dst = _dst;
angle = angle;
_ }*
* }*
* public struct EdgeInfo*
* {*
* public Vector3 pointA;*
* public Vector3 pointB;*
* public EdgeInfo(Vector3 _pointA, Vector3 pointB)
_ {*
* pointA = _pointA;
pointB = pointB;
_ }*
* }*
}
Full Editor visuals script:
using UnityEngine;
using System.Collections;
using UnityEditor;
[CustomEditor(typeof(PlayerAimingScript))]
public class AimEditorScript : Editor
{
* // this script creates a visual representation of the fov for the editor*
* void OnSceneGUI()*
* {*
* // creates the circle editor visual*
* PlayerAimingScript fow = (PlayerAimingScript)target;*
* Handles.color = Color.white;*
* Handles.DrawWireArc(fow.transform.position, Vector3.forward, Vector3.up, 360, fow.viewRadius);*
* // creates the editor view angle visual*
* Vector3 viewAngleA = fow.DirFromAngle(-fow.viewAngle / 2, false);*
* Vector3 viewAngleB = fow.DirFromAngle(fow.viewAngle / 2, false);*
_ Handles.DrawLine(fow.transform.position, fow.transform.position + viewAngleA * fow.viewRadius);
Handles.DrawLine(fow.transform.position, fow.transform.position + viewAngleB * fow.viewRadius);_
* Handles.color = Color.red;*
* }*
}
[1]: /storage/temp/194354-unityproblem.png