// simple drawing of 1 pixel line using bresnenhams
public static void DrawLine(this SpriteBatch @this, Vector2 start, int length, float angleInDegrees, Color Colour)
{
var texture = SpriteBatchExtensions.GetOnePixelTexture(@this.GraphicsDevice);
var endVector = GeneralExtensions.UnitAngleVector(angleInDegrees, length);
// negation of x was ngation of y not sure why it works.
var endPoint = start + endVector;
// create the list of points
var lineData = Bresenham.GetLine(start.ToPoint(), endPoint.ToPoint());
lineData.ToList().ForEach(a => @this.Draw(texture, a.ToVector2(), Color.White));
}
public override void FixedUpdate()
{
base.FixedUpdate();
if (BeingDestroyed || Destroyed)
{
return;
}
if (hero != null)
{
line.Clear();
Bresenham.GetLine(Transform.Position + middleOffset, hero.Transform.Position + new Vector2(0, -8), line);
seesHero = Bresenham.CanLinePass(Transform.Position + middleOffset, hero.Transform.Position + new Vector2(0, -8), (x, y) => {
return(Scene.GridCollisionChecker.HasBlockingColliderAt(new Vector2(x / Config.GRID, y / Config.GRID), Direction.CENTER));
});
if (seesHero)
{
//seesHero &= (CurrentFaceDirection == Direction.EAST && hero.Transform.X > Transform.X || CurrentFaceDirection == Direction.WEST && hero.Transform.X < Transform.X);
if (hero.Transform.X < Transform.X)
{
CurrentFaceDirection = Direction.WEST;
}
else
{
CurrentFaceDirection = Direction.EAST;
}
}
}
else
{
seesHero = false;
}
if (seesHero)
{
sprite.Rotation = MathUtil.RadFromVectors(Transform.Position, hero.Transform.Position) - sprite.BaseRotation;
Fire();
}
}