public virtual trajectory.Trajectory roll()
{
var r = worldRect.width();
var diagAng = Mathf.Asin(worldRect.height() / r);
var horOffsetLimit = r - r * Mathf.Cos(diagAng);
float xMin = worldRect.x0 + r;
float xMax = worldRect.x0 + 2 * r - horOffsetLimit;
float x0 = UnityEngine.Random.Range(xMin, xMax);
float y0 = UnityEngine.Random.Range(worldRect.y0, worldRect.y1);
float speedSign = odd ? 1 : -1;
float angSpeed = speedSign * speed.value / r;
var period = new Range(t, t + 10);
float yInWorldRectSpace = y0 - worldRect.y0;
float startAngle = odd ?
Mathf.PI + Mathf.Acos((yInWorldRectSpace) / r) :
(Mathf.PI * 3 / 2) + Mathf.Asin((worldRect.height() - yInWorldRectSpace) / r);
var tr = new LeftArcTrajectory(x0, y0, r, angSpeed, startAngle, period);
tr.period.t2 = odd ?
tr.getTbyY(worldRect.y1):
tr.getTbyY(worldRect.y0);
return(tr);
}
public static trajectory.Trajectory buildLine(float x1, float x2, float t0, math.WorldRect worldRect, float s, bool odd)
{
var xSign = x1 > x2 ? -1 : 1;
var ySign = odd ? 1 : -1;
float dx = (x2 - x1);
float dy = worldRect.height();
float dxSq = (dx * dx);
float dySq = (dy * dy);
float sySq = (((s * s) * dySq) / ((dySq + dxSq)));
float sxSq = ((s * s) - sySq);
float pathLen = Mathf.Sqrt(dxSq + dySq);
var period = new Range(t0, t0 + pathLen / s);
var line = new LineTrajectory(x1, odd ? worldRect.y0 : worldRect.y1, xSign * Mathf.Sqrt(sxSq), ySign * Mathf.Sqrt(sySq), period);
return(line);
}
