Circles!

[Will45]

Could someone teach me how to make something move in a circle? Thanks.

[btedji]

I would never had said that lol, havent had evough schooling yet

[TDK_RC6]

Originally posted by Kaimetsu


Cartesian coords: (centerx+mag*cos(ang),centery+mag*sin(ang))

Increase the angle and watch it spin.

what is mag??

[Saga2001]

magnitude.

[TDK_RC6]

magnitude??

like how much it will rotate

[Faheria_GP2]

Originally posted by TDK_RC6
magnitude??

like how much it will rotate

liek, teh radius foo! LEL!

[TDK_RC6]

well okay then, that helps more


i've never heard it called magnitude

[lordhelmut]

i learned a new vocab word =D but how would i incorporate that formula into a NPC?

[Faheria_GP2]

NPC Code:

---

if (playerenters) timeout=.05;

if (timeout) {

  this.angle=(this.angle+.1)%6.28;

  showimg 0,beer.gif,x+6*sin(this.angle),y+6*cos(this.angle)  ;

  timeout=.05;

}

---

[Saga2001]

Originally posted by Faheria_GP2

NPC Code:

---

if (playerenters) timeout=.05;

if (timeout) {

  this.angle=(this.angle+.1)%6.28;

  showimg 0,beer.gif,x+6*sin(this.angle),y+6*cos(this.angle)  ;

  timeout=.05;

}

---

;P

[joseyisleet]

-=Josey=-
Nice formula Kaimetsu. I wouldn't use showimg for that, I do believe showimg is local. So you could use something like this;

if (playerenters){
timeout=.05;
setimg light2.png;
setcoloreffect 0,0.5,1,0.99;
}
if (timeout) {
this.x=30;
this.y=30;
this.angle=(this.angle+.1)%6.28;
x = this.x+6*sin(this.angle);
y = this.y+6*cos(this.angle);
timeout=.05;
}

Just change this.x and this.y to wherever you want the light to be.

[nyghtGT]

*wishes she would have had a better Geometry teacher*

[joseyisleet]

-=Josey=-
Hey! Everyone makes mistakes. ;P In that formula, the angle = the speed, this.x+6 = the width, this.y+6 = the hieght.

[joseyisleet]

-=Josey=-
Lol, if you use the code that I provided above, it is.
Say you use this.angle=(this.angle+.7)%6.28;. That will speed up the circular movement. If you use this.x+10 and this.y+10 it will make the radius bigger, making it circle bigger.

[Slaktmaster]

Nice try, Josey.

[joseyisleet]

Lol. thisx+6 and this.y+6 = the circumference of the circle.

[joseyisleet]

- wonders what 6 + 6 is

[Saga2001]

Notice when he knows what he is saying is wrong, he starts all of his posts with Lol...thats just something I noticed...humans amaze me...
The curcumference is 2pi*r is it not? Not trying to correct Kaimetsu, I am seriously wondering.
And the area is pi*(r*r)...
and i consider myself bad at math...joseyisnoleet.

[joseyisleet]

-=Josey=-
- Shrugs. I've been up for about 5 days. Tired as heck and my mind isn't working right. ;\ Maybe after I eat breakfast I'll go to bed, doubtfull though. - Beats the hell out of insomnia. ;X

[Saga2001]

Originally posted by Kaimetsu


Cartesian coords: (centerx+mag*cos(ang),centery+mag*sin(ang))

Increase the angle and watch it spin.

what about this instead?
centerx+mag*cos(ang+rotate),centery+mag*sin(ang+ro tate)

it seems when you add to the numbers inside the sin and cos it makes them rotate, which would make sence, but its just a sidenote. look:

NPC Code:

---

if (playerenters) {

this.dista = 5;

this.distb = 5;

 timeout = .05;

}

if (timeout) {

 for (i=0;i<10;i+=.1 {

showimg (i*10)+500,@.,30+sin(i)*this.dista,30+cos(i+this.r  otate)*this.distb;

 }

this.rotate+=.05;

timeout = .05;

}

---

[dragoonvenganc]

to the person that said geometry this is pretty much trig..
i like making stuff move in a sine or cosine wave..
tangent is messed.. up.. any one out there besides kammy know what i mean

[nyghtGT]

Originally posted by Kaimetsu


Once again this is incorrect. The circumference of the circle is pi*12.

yes, the radius is equal to 2*pi*r ...

2*3.14*6=37.68 ...

That is the circufrence ...

the area of the circle is pi*r*r:

3.14*6*6=113.04

...

[nyghtGT]

Originally posted by Kaimetsu


Which is the same as 12*pi, except that my answer was more precise.

you get the same answer ...
and it helps him learn where to place the varaibles for his equations ...

[Saga2001]

What I am saying, is that if you add variables to to the numbers inside sine or cosine like incrementally add .05 to this.rotate and add it to i than it seems to rotate try the script I included when I first posted. Its actually very cool.

[Saga2001]

Originally posted by Kaimetsu


Ah, I understand now. I didn't notice that you were only adding to the sin.

Mmmmmm...l33t