public bool RayCast(Vector2 origin, Vector2 direction, float maxDistance, out RayCastHit hit, Category collisionMask)
{
var smallest = 1.0f;
//direction.Normalize();
var found = false;
var localHit = default(RayCastHit);
world.RayCast((f, p, n, fr) =>
{
if ((f.CollisionCategories & collisionMask) == f.CollisionCategories)
{
found = true;
if (fr < smallest)
{
smallest = fr;
}
localHit = new RayCastHit()
{
distance = fr * maxDistance, hitPoint = p, normal = n, fixture = f
};
return(fr);
}
return(-1);
}, origin, origin + direction * maxDistance);
hit = localHit;
return(found);
}
void SlideDownMaxSlope(RayCastHit hitInfo, ref Vector2 moveAmount)
{
var slopeAngle = MathHelper.ToDegrees((float)Math.Acos(Vector2.Dot(hitInfo.normal, UpVector)));
if (slopeAngle < 90 && slopeAngle > maxSlopeAngle)
{
moveAmount.X = (float)(Math.Sign(hitInfo.normal.X) * (Math.Abs(moveAmount.Y) - hitInfo.distance) / Math.Tan(MathHelper.ToRadians(slopeAngle)));
collisions.slopeAngle = slopeAngle;
collisions.slidingDown = true;
collisions.slopeNormal = hitInfo.normal;
}
}