Solved Trig, cos,sin,tan. Info here

I've been searching on Bukkit of different ways to position particles and players, and i always see somethings like

Code:java

Math.cos()
Math.sin()
Math.tan()

But from my understanding that work like (opposite/hypotenuse) for sin i believe, but i don't understand how they work with java. Someone care to provide a quick explanation for this?

 

Those functions in java do for all of your purposes exactly the same they would do in mathematics. If you could narrow down your question, we'd propably be able to help you in more detail

 

unforgiven5232
If you actually look at the methods, they require double parameters. The double parameter is an angle in radians.

 

Radians? I've heard it before, just don't know it

 

In that case you won't be able to put those methods to much use without at least refreshing some elementary trigonometry.

 

unforgiven5232
Radians are part of Circular Geometry (Unlike Triangle Geometry, which use degree formatting of angles).

1 Radian is (180 / 2pi): Therefore there are 2 radians in one loop around a circle. Every 90 degrees adds 1/2pi to the measure. This is very basic: Go look up more info so you actually understand anything I just said.

 

AoH_Ruthless You explained it very well, if I could, i would draw the picture to help show what you explained

 

Yea so the functions will return the sign/cos/tan value.
Math.sin(double d); - return y value
Math.cos(double d); - returns x value
Math.tan(double d); - slope
So Math.sin(Math.PI/2) would return 1. Because on the unit circle the y value at radian pi/2 is 1.
Then, for example, you could add that and the players x and y to make a circle around them.

 

Windy Day AoH_Ruthless Thanks for your help!

Windy Day Hey also, would you mind explaining

Code:java

Math.toRadians(#)

Please?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

unforgiven5232 http://docs.oracle.com/javase/7/docs/api/java/lang/Math.html#toRadians(double) Simply converts the degree to a Radian

 

xTigerRebornx exactly what i was looking for, thanks

 

That is not exactly accurate.

Every full loop around a circle (ie 360°) is equal to 2π radians instead of just 2 radians. Every half loop around a circle (ie 180°) is equal to π radians.

If you have an angle ø, measured in degrees, the proper way to convert it to radians is ø*(π/180°). If you have an angle ø, measured in radians, the proper way to convert it to degrees is ø*(180°/π).