public void QueryLine(float x1, float y1, float x2, float y2, QuerySelector selector, float width, Func <Entity, bool> callback)
{
var start = new Vector2(x1, y1);
var line = new Vector2(x2 - x1, y2 - y1);
var length = line.Length();
var increment = 1.0f / (length / (width * 2));
var pct = 0.0f;
while (pct <= 1.0f)
{
var pos = start + line * pct;
var stop = false;
QueryRect(pos.X - width / 2, pos.Y - width / 2, Mathf.Ceiling(width), Mathf.Ceiling(width), selector, (entity) =>
{
if (callback(entity))
{
stop = true;
return(true);
}
return(false);
});
if (stop)
{
return;
}
pct += increment;
}
}
public QueryResult QueryLine(float x1, float y1, float x2, float y2, QuerySelector selector, float width = 1.0f)
{
var result = QueryResult.None;
QueryLine(x1, y1, x2, y2, selector, width, (entity) =>
{
result = new QueryResult(entity);
return(true);
});
return(result);
}
public QueryResult QueryCircle(Vector2 position, float radius, QuerySelector selector)
{
var result = QueryResult.None;
QueryCircle(position, radius, selector, (entity) =>
{
result = new QueryResult(entity);
return(true);
});
return(result);
}
public void QueryRect(float x, float y, int width, int height, QuerySelector selector, Func <Entity, bool> callback)
{
selector.Select(this, (entity) =>
{
if (entity.CollideRect(x, y, width, height) != HitInfo.None)
{
return(callback(entity));
}
return(false);
});
}
public QueryResult QueryRect(float x, float y, int width, int height, QuerySelector selector)
{
var result = QueryResult.None;
QueryRect(x, y, width, height, selector, (entity) =>
{
result = new QueryResult(entity);
return(true);
});
return(result);
}
public void QueryCircle(Vector2 position, float radius, QuerySelector selector, Func <Entity, bool> callback)
{
var radiusSquared = radius * radius;
selector.Select(this, (entity) =>
{
if (position.DistanceSquared(entity.Position) < radiusSquared)
{
return(callback(entity));
}
return(false);
});
}
public void QueryRect(Rectangle rect, QuerySelector selector, Func <Entity, bool> callback)
{
QueryRect(rect.X, rect.Y, rect.Width, rect.Height, selector, callback);
}
public QueryResult QueryRect(Rectangle rect, QuerySelector selector)
{
return(QueryRect(rect.X, rect.Y, rect.Width, rect.Height, selector));
}