private EdgeInfo FindEdge(VisionCastInfo minVisionCast, VisionCastInfo maxVisionCast)
{
var minAngle = minVisionCast.Angle;
var maxAngle = maxVisionCast.Angle;
var minPoint = Vector3.zero;
var maxPoint = Vector3.zero;
for (int i = 0; i < EdgeResolveIterations; i++)
{
var angle = (minAngle + maxAngle) / 2;
var newVisionCast = VisionCast(angle);
var edgeDistanceThresholdExceeded = Mathf.Abs(minVisionCast.Distance - newVisionCast.Distance) > EdgeDistanceThreshold;
if (newVisionCast.Hit == minVisionCast.Hit && !edgeDistanceThresholdExceeded)
{
minAngle = angle;
minPoint = newVisionCast.Point;
}
else
{
maxAngle = angle;
maxPoint = newVisionCast.Point;
}
}
return(new EdgeInfo(minPoint, maxPoint));
}
private void DrawVision()
{
int stepCount = Mathf.RoundToInt((Angle / 10) * VisionMeshResolution);
var stepAngleSize = Angle / stepCount;
var vertices = new List <Vector3>();
var oldVisionCast = new VisionCastInfo();
for (int i = 0; i <= stepCount; i++)
{
var angle = _unitVisionDisplayInstance.transform.eulerAngles.y - Angle / 2 + stepAngleSize * i;
var newVisionCast = VisionCast(angle);
if (i > 0)
{
var edgeDistanceThresholdExceeded = Mathf.Abs(oldVisionCast.Distance - newVisionCast.Distance) > EdgeDistanceThreshold;
if (oldVisionCast.Hit != newVisionCast.Hit ||
(oldVisionCast.Hit && newVisionCast.Hit && edgeDistanceThresholdExceeded))
{
var edge = FindEdge(oldVisionCast, newVisionCast);
if (edge.PointA != Vector3.zero)
{
vertices.Add(_unitVisionDisplayInstance.transform.InverseTransformPoint(edge.PointA));
}
if (edge.PointB != Vector3.zero)
{
vertices.Add(_unitVisionDisplayInstance.transform.InverseTransformPoint(edge.PointB));
}
}
}
vertices.Add(_unitVisionDisplayInstance.transform.InverseTransformPoint(newVisionCast.Point));
oldVisionCast = newVisionCast;
}
vertices.Insert(0, Vector3.zero);
int numTriangles = (vertices.Count - 2);
int[] triangles = new int[numTriangles * 3];
for (int i = 0; i < numTriangles; i++)
{
triangles[i * 3] = 0;
triangles[i * 3 + 1] = i + 1;
triangles[i * 3 + 2] = i + 2;
}
_visionMesh.Clear();
_visionMesh.vertices = vertices.ToArray();
_visionMesh.triangles = triangles;
_visionMesh.RecalculateNormals();
}
