private void calculatePath(Vector2 startingPosition, Vector2 initialDirection, Rectangle boundingBox, BoundingBoxSide finalDestination)
{
//Define a variable to keep track of "exit border" - that is, what bounding box border is the object hitting first
BoundingBoxSide?exitBorder = null;
//Define a variable to keep track of the exact position where the object hits the "exit border"
Vector2 exitPosition = Vector2.Zero;
//Define a variable to keep track of the new direction the object will travel in as it reflects from the "exit border"
Vector2 newDirection = Vector2.Zero;
//TODO: calculations... see "BulletPath" example ... and Stan
float yDistanceRatio = (boundingBox.Height - startingPosition.Y) / initialDirection.Y;
float xintercept = initialDirection.X * yDistanceRatio;
//Recursion and exit condition
if (exitBorder != finalDestination)
{
//calculatePath(exitPosition, newDirection, boundingBox, finalDestination);
}
}
/// <summary>
/// Calculate and visually represent the path of an object traveling in a predefined bounding box
/// </summary>
/// <param name="startingPosition">Starting position of the object whose path is being calculated</param>
/// <param name="initialDirection">The direction in which the object starts its movement</param>
/// <param name="boundingBox">The predefined bounding box in which the object is traveling</param>
/// <param name="finalDestination">The side of the bounding box where the travel ends. Reaching this side stops further calculations</param>
public PathMapper(Vector2 startingPosition, Vector2 initialDirection, Rectangle boundingBox, BoundingBoxSide finalDestination)
: base(Vector2.Zero, null)
{
//Check for invalid finalDestination value
if (finalDestination.HasFlag(BoundingBoxSide.Bottom) && finalDestination.HasFlag(BoundingBoxSide.Top))
{
throw new ArgumentOutOfRangeException("Final Destination cannot be \"Bottom Top\"");
}
if (finalDestination.HasFlag(BoundingBoxSide.Left) && finalDestination.HasFlag(BoundingBoxSide.Right))
{
throw new ArgumentOutOfRangeException("Final Destination cannot be \"Left Right\"");
}
calculatePath(startingPosition, initialDirection, boundingBox, finalDestination);
}
