10000 forum users celebration - special event

[anon19508339]

Know Sine and Cosine?

[anon19508339]

Any thoughts? @Admin (Screen isn’t mine)

[anon2458064]

me and infintiz had so muchhhhhhhhhhhhhh to trash talk btw comfyy is me lol

[anon19508339]

Insulting others not gonna make his own hosting any better, they even get angry on why someone votes them down and accusing them with the “fake review” stamp.

[anon2458064]

yea butttttttttttttttttttttttttt using that much cuss words pissed me off big time

[anon19508339]

Grow a thick skin bro. His second line made me laugh.

[anon2458064]

you know me more than i know myself -__-

[anon19508339]

While I know you for 5 months only.

[anon2458064]

still

[anon19508339]

I also know that you are gay, go apply the second line on him my brave bro.

[anon2458064]

bruhhhhhhh :apafrog: i aint gay, fat is :kekw:

[anon19508339]

@anon2458064

i aint gay

If you think so.

[anon2458064]

i wanna get a vps but no moneyyyyyyyyyyyyyyy

[Thewebuser22]

I know it for right trig, not anything else (IDK the law of sines and cosines and such).

[anon19508339]

Nearly the same, depending on how you’re going to put things on the surface of the sphere:

How to render 3D in 2D canvas - Mamboleoo

[Thewebuser22]

I just want to get random coordinates that also coincide with the surface of a sphere.

[Oxy]

var distance = THREE.Math.randFloatSpread(100)

• Can I place obects on a sphere surface evenly - #7 by prisoner849 - Questions - three.js forum

• How to place randomly a box on a sphere - #4 by espace3d - Questions - three.js forum

• 3D Graphics: A WebGL Tutorial | Toptal®

[Thewebuser22]

I want to know the math tho

[anon19508339]

Wait I was going to put step by step of my code but will do it again.
The circle and Sphere use trigonometry for their form, in circle you use sin and cos but it is different when it comes to the sphere, Because we have a new axis named Z.

@trigonometry on circle

Lets say, we have a variable which has the radius of the circle var radius = THE_VALUE;
You can generate a random point on the circle with this:

var degrees = Math.random()*Math.PI*2; //js is based on radians so i technically generate a random number between 0 and 360 in radians.
var x = Math.cos(degrees) * radius;
var y = Math.sin(degrees) * radius;

This will generate a random [x,y] point on the line of the circle, however we’ve to move it to the location of the circle:

var degrees = Math.random()*Math.PI*2; //js is based on radians so i technically generate a random number between 0 and 360 in radians.
var x = Math.cos(degrees) * radius+circleX;
var y = Math.sin(degrees) * radius+circleY;

But due to the z axis it works different on the sphere.
The resources are explicit on the internet, and since you’re a beginner, I’ll give a simpler solution as you only need to generate random points.

@trigonometry on sphere

I’ll use the same formula i used for the circle ones, but a bit more advanced.

var degrees = Math.random()*Math.PI*2; //js is based on radians so i technically generate a random number between 0 and 360 in radians.
var polar = Math.random()*Math.PI*2; // creates a random point on z axis between [-radius,radius]
var x = Math.cos(degrees) * radius * Math.cos(polar) + circleX;
var y = Math.sin(degrees) * radius * Math.cos(polar) + circleY;
var z = Math.sin(polar) * radius+circleZ;

The question is why did I mulplity x and y to the polar variable?
This is when polar is 0 (blue horizontal line is Z axis), it looks like this:

But for example if polar is over or under 0, it has to look like this:

If I did not mulplity the x and y to polar, the point will have distance like this: