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.

Re: Re: Re: Re: angles
 

it depends though .. b/c like if ur angle is really small then if u add pi it would go totally diff direction .. its weird O.o

when you add pi to an angle, it should go in the total opposite direction, like down would be up, left would be right

I just wanted to know of a way to do it using a certain formula.
I can do it other ways too but I wanted a shorter way