/// <summary>
/// Checks to see if the target is within the given angle
/// and within the given distance. Returns false if no
/// target has been set. Both the angle and the distance are inclusive.
/// </summary>
/// <param name="maxAngle">The maximum angle (in radians)
/// that the target can be detected.</param>
/// <param name="maxDistance">The maximum distance that the target can be detected.</param>
/// <returns></returns>
public bool CheckTargetInSight(float maxAngle, float maxDistance)
{
//Get the point maxAngle distance along a circle where radius = maxDistance
Vector2 topPosition = new Vector2(
(float)(_position.X + maxDistance * Math.Cos(-maxAngle)),
(float)(_position.Y + maxDistance * Math.Sin(-maxAngle)));
//Get the point -maxAngle distance along a circle where radius = maxDistance
Vector2 bottomPosition = new Vector2(
(float)(_position.X + maxDistance * Math.Cos(maxAngle)),
(float)(_position.Y + maxDistance * Math.Sin(maxAngle)));
// Draw partial circle
Raylib.DrawCircleSector(
new System.Numerics.Vector2(_position.X * 32, _position.Y * 32),
maxDistance * 32,
(int)((180 / Math.PI) * -maxAngle) + 90,
(int)((180 / Math.PI) * maxAngle) + 90,
10,
Color.GREEN);
//Checks if the target has a value before continuing
if (Target == null)
{
return(true);
}
//Find the vector representing the distance between the actor and its target
Vector2 direction = Vector2.Normalize(Target.Position - Position);
//Get the magnitude of the distance vector
float distance = direction.Magnitude;
//Use the inverse cosine to find the angle of the dot product in radians
float angle = (float)Math.Acos(Vector2.DotProduct(Forward, direction.Normalized));
//Return true if the angle and distance are in range
if (angle <= maxAngle && distance <= maxDistance)
{
return(true);
}
return(false);
}