// Get 'next' MinBoundingBox, i.e. box after prospective movement
public override Box GetNextBox(float angle, Vector2 axis, Vector2 vector)
{
// Entry logging
#if IS_LOGGING_METHODS
Log.Write(String.Format("Entering method for {0}", this.Name));
#endif
// Declare result
Box result;
// Check if there is rotational motion
if (angle == 0)
{
// If not, simply translate the current box and stop
result = this.MinBoundingBox;
result.TranslateBy(vector);
goto exit;
}
// Otherwise, we must rotate and translate each vertex. First, we
// initialize x- and y-axis [min, max] intervals
float xMin = float.PositiveInfinity;
float xMax = float.NegativeInfinity;
float yMin = float.PositiveInfinity;
float yMax = float.NegativeInfinity;
// Loop through vertices
for (int i = 0; i < this.Vertices.Count; i++)
{
// Point to current vertex
Vector2 vertex = this.Vertices[i];
// Rotate and translate vertex
vertex = Vector2.Rotate(this.Vertices[i], angle, axis) + vector;
// Update [min, max] intervals
if (vertex.X < xMin)
{
xMin = vertex.X;
}
if (vertex.X > xMax)
{
xMax = vertex.X;
}
if (vertex.Y < yMin)
{
yMin = vertex.Y;
}
if (vertex.Y > yMax)
{
yMax = vertex.Y;
}
}
// Create box
result = new Box(xMin, yMin, xMax - xMin, yMax - yMin);
// [*] Exit trap
exit:
// Exit logging
#if IS_LOGGING_METHODS
Log.Write(String.Format("Exiting method for {0}", this.Name));
#endif
// Return result
return(result);
}
