public static EdgePosition WhichEdge( Rectangle rect, float angleInRadians, Vector2 point, int edgeWidth )
{
var topGrap = new Rectangle( rect.X, rect.Y, rect.Width, edgeWidth ) ;
var bottomGrab = new Rectangle( rect.X, rect.Bottom - edgeWidth, rect.Width, edgeWidth ) ;
var leftGrab = new Rectangle( rect.X, rect.Y, edgeWidth, rect.Height ) ;
var rightGrab = new Rectangle( rect.X + rect.Width - edgeWidth, rect.Y, edgeWidth, rect.Height ) ;
var center = rect.Center ;
Vector2 pivot = center.ToVector2( ) ;
if( topGrap.ToPolygon( ).RotateAroundPoint( pivot, angleInRadians ).ContainsPoint(point ) )
{
return EdgePosition.Top ;
}
if( bottomGrab.ToPolygon( ).RotateAroundPoint( pivot, angleInRadians ).ContainsPoint(point ) )
{
return EdgePosition.Bottom ;
}
if( leftGrab.ToPolygon( ).RotateAroundPoint( pivot, angleInRadians ).ContainsPoint(point ) )
{
return EdgePosition.Left ;
}
if( rightGrab.ToPolygon( ).RotateAroundPoint( pivot, angleInRadians ).ContainsPoint(point ) )
{
return EdgePosition.Right ;
}
return EdgePosition.None ;
}
public override void drawSelectionFrame(SpriteBatch spriteBatch, Matrix matrix)
{
Primitives.Instance.drawBox(spriteBatch, this.rectangle, Color.Yellow, 2);
Vector2[] poly = rectangle.ToPolygon();
foreach (Vector2 p in poly)
{
Primitives.Instance.drawCircleFilled(spriteBatch, p, 4, Color.Yellow);
}
}
static Vector2[] rotateRectangleAroundCenter( Rectangle rectangle, float angleInRadians )
{
Vector2[ ] points = rectangle.ToPolygon( ) ;
Vector2 center = rectangle.Center.ToVector2( ) ;
for( int i = 0; i < points.Length; i++ )
{
points[ i ] = points[ i ].RotateAroundPoint(center, angleInRadians ) ;
}
return points ;
}
