This expression very hard to edit

Posted by Muhammad Mont on December 5, 2020 at 9:41 pm

I have amazing expression from Dan ebberts ,

How can I make it repeats it self every x second ?

its very hard to edit it by myself

Thanks!

elev = degreesToRadians(75);
v = 1900;
e = .7;
f = .5;
g = 5000;
nMax = 9;
tLaunch = 1;
 
vy = v*Math.sin(elev);
vx = v*Math.cos(elev);
if (time >= tLaunch){
  t = time - tLaunch;
  tCur = 0;
  segDur = 2*vy/g;
  tNext = segDur;
  d = 0; // x distance traveled
  nb = 0; // number of bounces
  while (tNext < t && nb <= nMax){
    d += vx*segDur;
    vy *= e;
    vx *= f;
    segDur *= e;
    tCur = tNext;
    tNext += segDur;
    nb++
  }
  if(nb <= nMax){
    delta = t - tCur;
    x = d + delta*vx;
    y = delta*(vy - g*delta/2);
  }else{
    x = d;
    y = 0;
  }
  value + [x,-y]
}else
  value

Muhammad Mont replied 5 years, 5 months ago 2 Members · 2 Replies

2 Replies

Dan Ebberts

December 6, 2020 at 7:56 am

It has limitations, but try this:

elev = degreesToRadians(75);
v = 1900;
e = .7;
f = .5;
g = 5000;
nMax = 9;
tLaunch = 1;
repeatEvery = 3;
nSegs = Math.floor((time-tLaunch)/repeatEvery);
vy = v*Math.sin(elev);
vx = v*Math.cos(elev);
t = (time - tLaunch)%repeatEvery;
tCur = 0;
segDur = 2*vy/g;
dSeg = 0; // x distance traveled
nb = 0; // number of bounces
while (nb <= nMax){
  dSeg += vx*segDur;
  vx *= f;
  segDur *= e;
  nb++
} 
vy = v*Math.sin(elev);
vx = v*Math.cos(elev);
if (time >= tLaunch){
  t = (time - tLaunch)%repeatEvery;
  tCur = 0;
  segDur = 2*vy/g;
  tNext = segDur;
  d = 0; // x distance traveled
  nb = 0; // number of bounces
  while (tNext < t && nb <= nMax){
    d += vx*segDur;
    vy *= e;
    vx *= f;
    segDur *= e;
    tCur = tNext;
    tNext += segDur;
    nb++
  }
  if(nb <= nMax){
    delta = t - tCur;
    x = d + delta*vx;
    y = delta*(vy - g*delta/2);
  }else{
    x = d;
    y = 0;
  }
  value + [x + nSegs*dSeg,-y]
}else
  value

Muhammad Mont
December 6, 2020 at 1:32 pm

Thanks Dan its works great ?

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This expression very hard to edit