angles
 

Does anyone know how to get the opposite (dont know how to explain) of an angle?
Like used in pong.
But I need it in sine/cosine form (pi being the 360º angle)

did you just ask *Puts lips together makes humming noise and moves finger up and down hundereds of times*?

That was stupid.

Opposite angle = angle - pi.

Re: Re: angles
 

I was looking at the radiant system and all that but I could not find a certain formula ..
I think I am not explaining myself well b/c in Pong the angle isnt always the opposite of what it was .. (specially when it hits the player tab thing)

btw whats getangle for?

and Slak I tried that.. not it .. hehe

hmmm I don't really know a formular for this but a way to emulate something like this is able with using vars for vertical and horizontal movement...

something like this for example:

NPC Code:

---

if(playerenters){

  this.vx=1;

  this.vy=-1;

  timeout=.05;

}



if(timeout){

  if(!onwall(x+(width/2)+this.vx+(.025*this.vx),y+height/2)){x+=this.vx;}

  else {this.vx=this.vx*(-1);}



  if(!onwall(x+(width/2),y+(height/2)+this.vy+(.025*this.vy))){y+=this.vy;}

  else {this.vy=this.vy*(-1);}



  timeout=.05;

}

---

it's like the pong ball

yes but the problem is that always goes in a certain angle
i need mine randomized to actually fit the real reflections of the angles ..
ok im confusing myself here..

Re: angles
 

I wish i could help, but I did not pay much attention in Geometry ... but remember (axa)+(bxb)=(cxc) ... I got
my forumals I could post for ya if ya want, they may help
a bit...

Re: Re: angles
 

its ok
i wont bother w/ this till I come across this agn and really need it hehe

Well, you could look for a Unit Circle for help. I had to use one last year in my Advanced Algebra/Trigonometry class. It is basically a circle with Radius 1 that has the Degree and Radian coordinates all along the circle. Like, 180 degrees is pi, while 90 degrees is pi/2. If you need to change degrees into radians, use this equation:
(degrees/180)*pi

if you would explain a little better, than i could help you, im great at mathmatics

what is getangle(dx,dy) for?

Yea, I would like to know what getangle is also

newfeatures:
- new script function getangle(dx,dy)

commands:
getangle( dx,dy ) the angle of vector (dx,dy) to the x coordinate (0...2*3.14)

That really doesnt help to much :(

Re: Re: Re: angles
 

well, if you have an angle going / and you want it to suddenly go \ I think you would add/subtract "pi/2"

could you possibly post an example? thats the way i usually learn best.