Nez.RectangleExt.calculateBounds C# (CSharp) Méthode

		public static void calculateBounds( ref Rectangle rect, Vector2 parentPosition, Vector2 position, Vector2 origin, Vector2 scale, float rotation, float width, float height )
		{
			if( rotation == 0f )
			{
				rect.X = (int)( parentPosition.X + position.X - origin.X * scale.X );
				rect.Y = (int)( parentPosition.Y + position.Y - origin.Y * scale.Y );
				rect.Width = (int)( width * scale.X );
				rect.Height = (int)( height * scale.Y );
			}
			else
			{
				// special care for rotated bounds. we need to find our absolute min/max values and create the bounds from that
				var worldPosX = parentPosition.X + position.X;
				var worldPosY = parentPosition.Y + position.Y;

				Matrix2D tempMat;
				// set the reference point to world reference taking origin into account
				var transformMatrix = Matrix2D.createTranslation( -worldPosX - origin.X, -worldPosY - origin.Y );
				Matrix2D.createScale( scale.X, scale.Y, out tempMat ); // scale ->
				Matrix2D.multiply( ref transformMatrix, ref tempMat, out transformMatrix );
				Matrix2D.createRotation( rotation, out tempMat ); // rotate ->
				Matrix2D.multiply( ref transformMatrix, ref tempMat, out transformMatrix );
				Matrix2D.createTranslation( worldPosX, worldPosY, out tempMat ); // translate back
				Matrix2D.multiply( ref transformMatrix, ref tempMat, out transformMatrix );

				// TODO: this is a bit silly. we can just leave the worldPos translation in the Matrix and avoid this
				// get all four corners in world space
				var topLeft = new Vector2( worldPosX, worldPosY );
				var topRight = new Vector2( worldPosX + width, worldPosY );
				var bottomLeft = new Vector2( worldPosX, worldPosY + height );
				var bottomRight = new Vector2( worldPosX + width, worldPosY + height );

				// transform the corners into our work space
				Vector2Ext.transform( ref topLeft, ref transformMatrix, out topLeft );
				Vector2Ext.transform( ref topRight, ref transformMatrix, out topRight );
				Vector2Ext.transform( ref bottomLeft, ref transformMatrix, out bottomLeft );
				Vector2Ext.transform( ref bottomRight, ref transformMatrix, out bottomRight );

				// find the min and max values so we can concoct our bounding box
				var minX = (int)Mathf.minOf( topLeft.X, bottomRight.X, topRight.X, bottomLeft.X );
				var maxX = (int)Mathf.maxOf( topLeft.X, bottomRight.X, topRight.X, bottomLeft.X );
				var minY = (int)Mathf.minOf( topLeft.Y, bottomRight.Y, topRight.Y, bottomLeft.Y );
				var maxY = (int)Mathf.maxOf( topLeft.Y, bottomRight.Y, topRight.Y, bottomLeft.Y );

				rect.Location = new Point( minX, minY );
				rect.Width = (int)( maxX - minX );
				rect.Height = (int)( maxY - minY );
			}
		}