private void CreateLines()
{
_lineVecs = new[]
{
new Vec2(-105, 20),
new Vec2(-70, 10),
new Vec2(-40, 5),
new Vec2(0, 5),
new Vec2(40, 5),
new Vec2(70, 10),
new Vec2(105, 20)
};
_lines = new LineSegment[_lineVecs.Length - 1];
for (var i = 0; i < _lines.Length; i++)
{
_lines[i] = new LineSegment(_position.Clone().Add(_lineVecs[i]), _position.Clone().Add(_lineVecs[i + 1]),
0x0000FF00);
_level.AddChild(_lines[i]);
}
}
/// <summary>
/// Handles Collisions and reflection between the ball and a given line.
/// </summary>
/// <param name="line">
/// Is the Line that the ball will be checked against.
/// </param>
/// <param name="reflectionStrength">
/// Is the amount of reflection that will be given to the ball,
/// 1 is a perfect bounce, 0 makes the ball not bounce at all.
/// </param>
/// <returns>Returns true when a collision was actually detected</returns>
private bool LineCollisionTest(LineSegment line, float reflectionStrength)
{
var lineVector = line.End.Clone().Subtract(line.Start);
var lineVectorNormalized = lineVector.Clone().Normalize();
var lineNormal = lineVector.Clone().Normal();
var lineLength = lineVector.Length();
var ballToLine = _ball.Position.Clone().Subtract(line.Start);
var ballDistance = ballToLine.Dot(lineNormal);
if (Math.Abs(ballDistance) < _ball.radius)
{
var ballDistanceAlongLine = ballToLine.Dot(lineVectorNormalized);
if (ballDistanceAlongLine < 0) ballDistanceAlongLine = 0;
if (ballDistanceAlongLine > lineLength) ballDistanceAlongLine = lineLength;
var closestPointOnLine = line.Start.Clone().Add(lineVectorNormalized.Scale(ballDistanceAlongLine));
var difference = _ball.Position.Clone().Subtract(closestPointOnLine);
if (difference.Length() < _ball.radius)
{
var normal = difference.Clone().Normalize();
var separation = _ball.radius - difference.Length();
_ball.Position.Add(normal.Clone().Scale(separation));
_ball.Velocity.Reflect(normal, reflectionStrength);
_ball.Step();
return true;
}
}
return false;
}
private void CreateLines()
{
var relativePoints = new Vec2[_points.Length];
for (var i = 0; i < _points.Length; i++)
{
relativePoints[i] = new Vec2();
relativePoints[i].x = _points[i].x + _realPosX;
relativePoints[i].y = _points[i].y + _realPosY;
}
for (var i = 0; i < relativePoints.Length; i++)
{
if (i < relativePoints.Length - 1)
{
if (UtilitySettings.DebugMode)
Console.WriteLine("Creating Line " + i + " with coords: " + relativePoints[i] +
relativePoints[i + 1]);
_lines[i] = new LineSegment(relativePoints[i], relativePoints[i + 1], this, _color);
if (!UtilitySettings.DebugMode) _lines[i].Color = 0x00000000;
}
else
{
if (UtilitySettings.DebugMode)
Console.WriteLine("Creating Line " + i + " with coords: " +
relativePoints[relativePoints.Length - 1] + relativePoints[0]);
_lines[i] = new LineSegment(relativePoints[relativePoints.Length - 1], relativePoints[0], this,
_color);
if (!UtilitySettings.DebugMode) _lines[i].Color = 0x00000000;
}
}
}