internal Common.LineSegment GetReturnLine(LineSegment incoming)
{
if (overrideMagnitude == double.MinValue)
return new LineSegment(incoming.EndingPos, ReturnAngle, incoming.Magnitude());
else
return new LineSegment(incoming.EndingPos, ReturnAngle, overrideMagnitude); ;
}
public LineSegment GetReflectionLine()
{
if(reflectionLine == null) {
reflectionLine = new LineSegment(segmentToReturnOn.Magnitude(), lineToCenter.Angle().Adjust(new Angle(90, true)), incomingPath.EndingPos);
}
return reflectionLine;
}
public void op_SubtractionTest()
{
LineSegment a = new LineSegment(new Vector(3, 2), new Vector(1, 5));
LineSegment b = new LineSegment(new Vector(1, 2), new Vector(6, 9));
LineSegment expected = null;
LineSegment actual;
actual = (a - b);
Assert.AreEqual(expected, actual);
Assert.Inconclusive("Verify the correctness of this test method.");
}
public bool PassedEscapedFromEllipseTest(System.Windows.Media.Geometry geometry, LineSegment path)
{
if (this == null)
throw new NullReferenceException();
var intersect2 = geometry.FillContainsWithDetail(
new System.Windows.Media.RectangleGeometry(GetReturnLine(path).AsSystemRect()));
if (intersect2 != System.Windows.Media.IntersectionDetail.Empty) {
return false;
} else return true;
}
internal void InitiateRandomWalk(Vector startingPosition = null, double stepSize = 5, int numberOfSteps = 100000)
{
this.numberOfSteps = numberOfSteps;
startingPosition = CurrentPosition;
if (startingPosition == null) {
CurrentPosition = new Vector(boardBounds.Width / 2, boardBounds.Height / 2);
}
Vector endingPosition = null;
for (stepCounter = 0; stepCounter < numberOfSteps; stepCounter++) {
double angleToWalk = newDirectionGenerator();
double x2 = CurrentPosition.GetX() + stepSize * Math.Cos(angleToWalk);
double y2 = CurrentPosition.GetY() + stepSize * Math.Sin(angleToWalk);
endingPosition = new Vector(x2, y2);
LineSegment newPath = new LineSegment(CurrentPosition, endingPosition);
pathWalker(newPath, Color.Blue);
testForCollisionAndAdd(newPath);
}
}
public void SetLineFromAngleAlone(LineSegment incomingPath)
{
}
public ReflectionReturnValue(Angle angle, LineSegment lineToCenter)
{
this.Angle = angle;
this.lineToCenter = lineToCenter;
}
public void Add(LineSegment addMe)
{
fullPath.Add(addMe);
}
private void testForCollisionAndAdd(LineSegment path)
{
ReflectionReturnValue reflectedLine = null;
foreach (IObstruction obst in obstructions) {
reflectedLine = obst.TestForCollision(path);
if (reflectedLine != null && reflectedLine.Angle != null && stepCounter < numberOfSteps) {
reflectedLine.SetLineFromAngleAlone(path);
reflectedLine.PrintReflectionLine(g);
pathWalker(reflectedLine.GetLineToReturnOn(), Color.Red);
//LineSegment reflectedLine = new LineSegment(path.EndingPos, angleToReturnOn, path.Magnitude());
//pathWalker(reflectedLine, Color.Red);
testForCollisionAndAdd(reflectedLine.GetLineToReturnOn());
}
}
}
private bool youGotOutOfTheEllipse(LineSegment resultantVector)
{
if (Geometry.FillContainsWithDetail(resultantVector.AsLineGeometry()) != System.Windows.Media.IntersectionDetail.Empty) {
return false;
} else return true;
}
private Vector checkForPassedWalls(LineSegment path)
{
Vector newEndPoint = null;
if (path.EndingPos.GetX() > Map.Width) {
horizBoardIdx++;
newEndPoint = new Vector(path.EndingPos.GetX() - Map.Width, path.EndingPos.GetY());
}
if (path.EndingPos.GetX() < 0) {
horizBoardIdx--;
newEndPoint = new Vector(path.EndingPos.GetX() + Map.Width, path.EndingPos.GetY());
}
if (path.EndingPos.GetY() > Map.Height) {
vertBoardIdx++;
newEndPoint = new Vector(path.EndingPos.GetX(), path.EndingPos.GetY() - Map.Height);
}
if (path.EndingPos.GetY() < 0) {
vertBoardIdx--;
newEndPoint = new Vector(path.EndingPos.GetX(), path.EndingPos.GetY() + Map.Height);
}
return newEndPoint;
}
private void testForCollisionAndAdd(LineSegment path)
{
ReflectedLine reflectedLine = null;
Rectangle rectOfCentersToCheck = getRectangleForCentersToCheck(path);
foreach (IObstruction obst in obstructions.Where(i => rectOfCentersToCheck.ContainsPoint(i.CenterPoint))) {
reflectedLine = obst.TestForCollision(path);
if (reflectedLine != null && reflectedLine.ReturnAngle != null && stepCounter < numberOfSteps) {
if (!reflectedLine.PassedEscapedFromEllipseTest(obst.Geometry, path)) {
//This means we didn't get away
//Print relevant error data!!
pathWalker(reflectedLine.GetReturnLine(path), Color.Green);
//stepCounter = numberOfSteps;
} else {
pathWalker(reflectedLine.GetReturnLine(path), Color.Red);
testForCollisionAndAdd(reflectedLine.GetReturnLine(path));
}
}
}
}
private void pathWalker(LineSegment path, Color color)
{
stepCounter++;
if (color == null)
color = Color.Brown;
printToBoard(path, color);
fullPath.Add(path);
var newEndPt = checkForPassedWalls(path);
if (newEndPt == null)
CurrentPosition = path.EndingPos;
else CurrentPosition = newEndPt;
}
private Rectangle getRectangleForCentersToCheck(LineSegment path)
{
int leftEdge = (int)path.EndingPos.GetX() - Map.AxisMax;
if (leftEdge < 0)
leftEdge += Map.Width;
int topEdge = (int)path.EndingPos.GetY() - Map.AxisMax;
if (topEdge < 0)
topEdge += Map.Height;
int width = Map.AxisMax * 2;
if (width + leftEdge > Map.Width)
{}
int height = Map.AxisMax * 2;
if(height + topEdge > Map.Height)
{}
return new Rectangle(leftEdge, topEdge, height, width);
//TODO: This code is buggy/not working and must be fixed!! The bounding rectangle of centers should wrap around the borders!!!!
}
public ReflectionReturnValue TestForCollision(LineSegment path)
{
var rectangle = new System.Windows.Rect((int)path.EndingPos.GetX(), (int)path.EndingPos.GetY(), 1,0);
var intersect = Geometry.FillContainsWithDetail(new System.Windows.Media.RectangleGeometry(rectangle));
if (intersect != System.Windows.Media.IntersectionDetail.Empty) {
Angle incomingLineAngle = 180 - path.Angle();
Angle incidentAngle = path.AngleBetweenPoints(CenterPoint);
Debug.Print("Angle of incoming line: " +incomingLineAngle.ToString());
Debug.Print("Angle to center line: " + incidentAngle.InDegrees().ToString());
Angle returnAngle = path.Angle() - incidentAngle * 2;
Debug.Print("Return Angle: " + returnAngle.ToString());
return new ReflectionReturnValue(returnAngle, new LineSegment(CenterPoint, path.EndingPos));
}
return null;
}
public ReflectionReturnValue TestForCollision(LineSegment path)
{
Angle angleToReturnOn = null;
if (path.Angle().InRadians() == 0)
throw new Exception("This should never happen!");
if (path.EndingPos.GetX() <= BoundingRectangle.Left || path.EndingPos.GetX() >= BoundingRectangle.Right){
angleToReturnOn =new Angle(path.YComponent(), -path.XComponent());
}
if (path.EndingPos.GetY() >= BoundingRectangle.Bottom) {
angleToReturnOn= new Angle(-path.YComponent(), path.XComponent());
}
if (path.EndingPos.GetY() <= BoundingRectangle.Top) {
angleToReturnOn = new Angle(path.YComponent(), path.XComponent()).Negate();
}
return new ReflectionReturnValue(angleToReturnOn);
}
public void ReflectLineTest()
{
Vector start = null; // TODO: Initialize to an appropriate value
Vector end = null; // TODO: Initialize to an appropriate value
LineSegment target = new LineSegment(start, end); // TODO: Initialize to an appropriate value
LineSegment lineToReflectOver = null; // TODO: Initialize to an appropriate value
LineSegment expected = null; // TODO: Initialize to an appropriate value
LineSegment actual;
actual = target.ReflectOverLineThroughOrigin(lineToReflectOver);
Assert.AreEqual(expected, actual);
Assert.Inconclusive("Verify the correctness of this test method.");
}
private void pathWalker(LineSegment path, Color color)
{
stepCounter++;
if (color == null)
color = Color.Brown;
printToBoard(path, color);
fullPathWalked.Add(path);
CurrentPosition = path.EndingPos;
}
private void printToBoard(LineSegment path, Color color)
{
Point startingPoint = new Point((int)path.StartingPos.GetX(), (int)path.StartingPos.GetY());
Point endingPoint = new Point((int)path.EndingPos.GetX(), (int)path.EndingPos.GetY());
g.DrawLine(new System.Drawing.Pen(color, 1f), startingPoint, endingPoint);
}
public ReflectedLine TestForCollision(Common.LineSegment path)
{
var intersect = Geometry.FillContainsWithDetail(new System.Windows.Media.RectangleGeometry(path.AsSystemRect()));
if (intersect != System.Windows.Media.IntersectionDetail.Empty) {
Angle incidentAngle = path.AngleBetweenPoints(CenterPoint);
Angle incidentAngleTimesTwo = incidentAngle * 2;
Angle threesixtyMinus = (new Angle(360, true) - incidentAngleTimesTwo);
Common.LineSegment lineToCenter = new Common.LineSegment(path.EndingPos, CenterPoint);
Angle oneEighty = new Angle(180, true);
//SEARCH FOR THE RETURN ANGLE:
var outLine = computeReturnAngle(oneEighty, path.Angle(), threesixtyMinus, incidentAngle, path);
if (outLine != null)
return outLine;
outLine = computeReturnAngle(oneEighty, path.Angle(), -threesixtyMinus, incidentAngle, path);
if (outLine != null)
return outLine;
outLine.Extend(path.Magnitude());
outLine = computeReturnAngle(oneEighty, path.Angle(), threesixtyMinus, incidentAngle, path);
if (outLine != null && outLine.PassedEscapedFromEllipseTest(Geometry, path) == true)
return outLine;
outLine = computeReturnAngle(oneEighty, path.Angle(), -threesixtyMinus, incidentAngle, path);
if (outLine != null && outLine.PassedEscapedFromEllipseTest(Geometry, path) == true)
return outLine;
throw new Exception();
}
return null;
}
