/// <summary>
/// Makes a zig zag path
/// </summary>
/// <param name="startPos"></param>
/// <param name="endPos"></param>
/// <param name="zigZag"></param>
/// <param name="steps"></param>
/// <param name="speed"></param>
public void makePathZigZag(Vector2 startPos, Vector2 endPos, Vector2 zigZag, int steps, float speed)
{
lst = new List<WayPoint>();
float zig = 1;
for (int i = 0; i < steps; i++)
{
Vector2 v=new Vector2(0,0);
float lerp = (float)i / ((float)steps-1);
v.X = MathHelper.Lerp(startPos.X, endPos.X, lerp);
v.Y = MathHelper.Lerp(startPos.Y, endPos.Y, lerp);
v = v + (zig * zigZag);
WayPoint w = new WayPoint(v, speed);
add(w);
zig = zig * (-1);
}
wayFinished = 1; // typically you want this
}
/// <summary>
/// Make a parabolic path changing velocity by delta to -/+ limits in
/// </summary>
/// <param name="startPos"></param>
/// <param name="initVelocity"></param>
/// <param name="delta"></param>
/// <param name="speedLimit"></param>
/// <param name="limits"></param>
public void makePathDelta(float speed, int maxSteps, Vector2 startPos, Vector2 initVelocity, Vector2 delta, Rectangle limits)
{
lst = new List<WayPoint>();
Vector2 p = new Vector2(startPos.X, startPos.Y);
Vector2 v = new Vector2(initVelocity.X, initVelocity.Y);
WayPoint w = new WayPoint(p, speed);
add(w);
for (int i = 0; i < maxSteps - 1; i++)
{
//Vector2 v = new Vector2(p.X+v.X,p.Y+v.X);
p=p+v;
v = v + delta;
w = new WayPoint(p, speed);
add(w);
if (!limits.Contains((int)p.X, (int)p.Y))
{
break;
}
}
wayFinished = 2; // typically you want this
}
/// <summary>
/// returns the index for subsequent use as leg
/// </summary>
/// <param name="w"></param>
/// <returns></returns>
public int add(WayPoint w)
{
lst.Add(w);
return lst.Count() - 1;
}
/// <summary>
/// Construct a circular path of waypoints
/// </summary>
/// <param name="center"></param>
/// <param name="radius"></param>
/// <param name="startAngle"></param>
/// <param name="angleIncrement"></param>
/// <param name="steps"></param>
/// <param name="speed"></param>
/// <param name="Xscale">usually 1 for a circle, vary from 1 to creat ovals</param>
public void makePathCircle(Vector2 center, float radius, float startAngle, float angleIncrement, int steps, float speed, float Xscale)
{
lst = new List<WayPoint>();
for (int i = 0; i < steps; i++)
{
Vector2 v = Util.moveByAngleDist(new Vector2(0, 0), startAngle + (i * angleIncrement), radius);
v.X = v.X * Xscale;
v = v + center;
WayPoint w = new WayPoint(v, speed);
add(w);
}
}
/// <summary>
/// Construct a 3 position walpoint list
/// </summary>
/// <param name="w1"></param>
/// <param name="w2"></param>
/// <param name="w3"></param>
/// <param name="wayFinishedZ"></param>
public WayPointList(WayPoint w1, WayPoint w2, WayPoint w3, int wayFinishedZ)
{
wayFinished = wayFinishedZ;
reset();
add(w1);
add(w2);
add(w3);
}
