/*
* public void Move(double dt)
* {
* x += (float)(vx * dt);
* y += (float)(vy * dt);
* alpha += (float)(omega * dt);
* if (vx < 0) {
* if (x < radius) {
* x = radius * 2 - x;
* vx = -vx;
* }
* } else if (x >= U.WX - radius) {
* x = (U.WX - radius) * 2 - x;
* vx = -vx;
* }
* if (vy < 0) {
* if (y < radius) {
* y = radius * 2 - y;
* vy = -vy;
* }
* } else if (y >= U.WY - radius) {
* y = (U.WY - radius) * 2 - y;
* vy = -vy;
* }
* }
*/
public void MakeMove(double starttime, double endtime, List <Rib> ribs)
{
Rib r = new Rib(this, endtime, starttime);
r.Clip(ribs);
ribs.Add(r);
}
public void Clip(List <Rib> ribs)
{
var radius = sprite.Radius;
bool hit = false;
double poshit = 0.0;
if (speed.X < 0)
{
if (pos1.X < radius)
{
hit = true;
poshit = radius;
}
}
else if (pos1.X > U.WX - radius)
{
hit = true;
poshit = U.WX - radius;
}
if (hit)
{
// clipped by X
double thit = (poshit - pos0.X) / speed.X;
Rib next = Split(thit);
next.setSpeed(new Vec(-speed.X, speed.Y));
next.Clip(ribs);
ribs.Add(next);
hit = false;
}
if (speed.Y < 0)
{
if (pos1.Y < radius)
{
hit = true;
poshit = radius;
}
}
else if (pos1.Y > U.WY - radius)
{
hit = true;
poshit = U.WY - radius;
}
if (hit)
{
double thit = (poshit - pos0.Y) / speed.Y;
Rib next = Split(thit);
next.setSpeed(new Vec(speed.X, -speed.Y));
next.Clip(ribs);
ribs.Add(next);
hit = false;
}
}