New #challenge dweets

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200) // draw 50x200 rects

} // 122/140

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    u(t) is called 60 times per second.
    t: Elapsed time in seconds.
    S: Shorthand for Math.sin.
    C: Shorthand for Math.cos.
    T: Shorthand for Math.tan.
    R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5)
    c: A 1920x1080 canvas.
    x: A 2D context for that canvas.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Opposites

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pavel

function u(t) {

f=(i,j=i%1,k=~~i,m=j*j*(3-2*j))=>S(k*k)*m---m*S(--k*k)
for(i=c.width|=0;i--;)x.fillRect(i,540+99*f(i/32+5*t),5,5)

Mar 28 2020 9:41 PM UTC

}// 113/140

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I would love to find a better / shorter 1D noise function #challenge

u/pavel

This one assigns a 'random' number to each integer k via S(k*k) and uses smoothstep to interpolate between them.
u/pavel

Another idea to play around with f=(i,n=9)=>n&&C(n**.5*i)/n+f(i,n-1)
u/joeytwiddle

#random

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katkip

function u(t) {

/*‮*/t||(m=0);c.width*=1;if(t%1<0.0001)q=0;c.onclick=n=>{q++;};x.font='19cm"';m<q?m=q:0;x.fillText(`${m}/s`,200,800)

May 29 2019 6:39 PM UTC

}// 116/140

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Clickometer! How fast can you click? Records only the highscore.

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u/katkip

11 highscore with touchpad
u/katkip

#game #interactive #challenge
u/geb

13
u/pavel

/*‮*/Backwards huh
u/hope4tg

17 with touchpad *nice*
u/katkip

Wow
u/donbright

23 using both hands
u/donbright

#arcadeaction

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katkip

function u(t) {

f=(n)=>S(n/2) // FUNCTION HERE
x.lineTo(t*100,540+f(t)*400,10,10)
x.lineWidth=20;x.stroke();

Nov 17 2018 8:05 PM UTC

}// 92/140

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#challenge you may think it is impossible but change the function f to create a fractal

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katkip

function u(t) {

if(!t)r=Math.random,a=95,b=50;a+=r()<.5?-1:1;b+=r()<.5?-1:1;x.fillStyle=`hsla(${S(a)<C(b)?100:60},99%,50%,.3)`;x.fillRect(a*10,b*10,25,25)

Oct 19 2018 6:55 PM UTC

}// 138/140

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#challenge add more entities with different colors. If you think you are a genius, make them fight lol

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katkip

remix of d/10248 by u/katkip

function u(t) {

c.width^=0;x.translate(960,540);for(i=0;i++<90;)x.lineTo(0,i*15),
x.rotate(t/20+i/200),x.fill(),x.globalCompositeOperation='xor'

Oct 5 2018 10:04 AM UTC

}// 128/140

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#challenge #abstract if you look in the until it resets the rotate then you look away at an object, you will move that object with the mind!

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katkip

remix of d/5187 by u/JonasPeeters

function u(t) {

c.width=1920;
for(i=0;i<190;i++){x.fillStyle=R(T(i*3)*255,S(i/t)*255,C(t)*255);x.fillRect(S(i/10+t*2)*300+1000,T(i/30)*400+500,40,100)}

Aug 6 2018 12:05 PM UTC

}// 135/140

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#challenge add small *connections* between these 2 lines to make it look like a DNA. good luck

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veubeke

function u(t) {

M=576
for(i=M*2;i--;x.fillRect(i/24<<5,i%24<<5,32,32,x.fillStyle=r<0|r>=1?'red':R(_=r*256,_,_)))r=i>=M?
Math.random():
i/M

Jan 4 2018 11:14 PM UTC

}// 122/140

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This is a template to play with drop-in replacements for Math.random(). Enter code in the last line that uses the existing variables to produce values in the range [0,1). Red squares will appear if values are out of range.

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u/veubeke

A bad example :) https://www.dwitter.net/d/5541
u/sigveseb

A bit on the long side, but looks good: https://www.dwitter.net/d/5545
u/magna

Reminder that we can now link to dweets using the short notation: d/5545
u/joeytwiddle

Try: i**t%M/M One issue with sine/cosine is more black+white than grey: .5+S(i**t)/2
u/f8f82804

#tool #template
u/joeytwiddle

#random #challenge

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xem

function u(t) {

x.fillRect(t,t,t,t)

Dec 27 2017 7:02 PM UTC

}// 19/140

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quest for the smallest aimated dweet, top 2: 19b

u/BuRRak

x.fillText(t,t,t)
u/joeytwiddle

#challenge

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dwitter.net | #challenge