/// <summary>
/// Makes this <see cref="GameElement"/> look at the given <paramref name="targetPosition"/>.
/// </summary>
/// <param name="targetPosition">The target translation to look at.</param>
public void LookAt(Point3f targetPosition)
{
Matrix4f lookAtMatrix = Matrix4f.LookAt(Position, targetPosition, UpVector);
Matrix4f transformation = Matrix4f.CreateTranslation(Translation);
Matrix4f ret = (lookAtMatrix * transformation);
Vector3f direction = Point3f.CreateVector(targetPosition, Position);
Vector3f rotation = ret.GetEulerAngles();
if (direction.Z <= 0)
{
rotation.Y *= -1;
}
if (direction.Z == 0 && direction.Y == 0 && direction.X != 0)
{
rotation.Y = MathHelper.PiOver2 * (direction.X < 0 ? 1 : (direction.X > 0 ? -1 : 0));
}
if (direction.Z == 0 && direction.X == 0 && direction.Y != 0)
{
rotation.X = MathHelper.PiOver2 * (direction.Y < 0 ? 1 : (direction.Y > 0 ? -1 : 0));
}
Rotation = rotation;
//LookAt(Point3f.CreateVector(targetPosition, Position));
}
/// <summary>
/// Returns the transformation matrix of this <see cref="GameElement"/>.
/// </summary>
public Matrix4f GetTransformation()
{
Matrix4f t = Matrix4f.CreateTranslation(_translation);
Matrix4f r = Matrix4f.CreateRotation(_rotation);
Matrix4f s = Matrix4f.CreateScale(_scale);
return(s * r * t);
}
private void _setViewMatrix()
{
_viewMatrix = Matrix4f.CreateTranslation(-gameElement.WorldTransform.Translation) * Matrix4f.LookAt(_forward, _up);
}
