public LineTrajectory(float x0, float y0, float speedX, float speedY, Range period)
{
startX = x0;
startY = y0;
this.speedX = speedX;
this.speedY = speedY;
this.period = period;
}
public LeftArcTrajectory(float x0, float y0, float radius, float angularSpeed, float startAngle, Range period)
{
centerX = x0;
centerY = y0;
this.radius = radius;
this.startAngle = startAngle;
this.angularSpeed = angularSpeed;
this.period = period;
}