public static void DrawAngle(UnityEngine.Vector3 center, UnityEngine.Vector3 direction, UnityEngine.Vector3 axis, float angle)
{
var rotation = UnityEngine.Quaternion.AngleAxis(angle, axis);
var centerSize = UnityEditor.HandleUtility.GetHandleSize(center);
var maxSize = direction.magnitude;
var xdir = direction / maxSize;
//var ydir = UnityEngine.Vector3.Cross(xdir, axis);
var handleSize = Mathf.Min(centerSize, maxSize);
var drawAngle = UnityEngine.Mathf.Clamp(angle, -360, 360);
var realLength = Mathf.Max(1, Mathf.CeilToInt((anglePoints.Length / 360.0f) * Mathf.Abs(drawAngle)));
var pointSize = centerSize * 0.04f;
SceneHandles.color = SceneHandles.StateColor(SceneHandles.measureColor);
SceneHandles.DrawAAPolyLine(center + (xdir * pointSize), center + direction);
SceneHandles.DrawAAPolyLine(center + (rotation * (xdir * pointSize)), center + (rotation * direction));
SceneHandles.DrawWireDisc(center, Vector3.forward, pointSize);
direction = xdir * handleSize;
if (UnityEngine.Mathf.Abs(angle) > 0.0f)
{
var angleStep = drawAngle / realLength;
var curAngle = 0.0f;
for (int i = 0; i < realLength; i++)
{
anglePoints[i] = center + (UnityEngine.Quaternion.AngleAxis(curAngle, axis) * direction);
curAngle += angleStep;
}
SceneHandles.DrawDottedLines(anglePoints.Take(realLength).ToArray(), 4.0f);
rotation = UnityEngine.Quaternion.AngleAxis(angle, axis);
var right = rotation * Vector3.right;
var endPoint = center + (rotation * direction);
var arrowSize = handleSize * 0.2f; // UnityEditor.HandleUtility.GetHandleSize(endPoint) * 0.2f;
if (angle < 0.0f)
{
DrawFlatArrow(endPoint, -right, arrowSize);
}
else
{
DrawFlatArrow(endPoint, right, arrowSize);
}
}
Vector3 facing;
Vector3 position;
if (handleSize == maxSize)
{
facing = rotation * xdir;
position = center + (facing * handleSize);
}
else
{
var halfRotation = UnityEngine.Quaternion.AngleAxis(drawAngle / 2.0f, axis);
facing = halfRotation * xdir;
position = center;
}
DrawLabel(position, facing, 5, angle + "°");
}