New #random 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.

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paberr

remix of d/1053 by u/paberr

function u(t) {

w=1920;h=1080;k=window;m=10;l=Math.random;x.fillRect(k.b=(((k.b||(w/2))+(l()>.5?m:-m))%w+w)%w,k.g=(((k.g||(h/2))+(l()>.5?m:-m))%h+h)%h,m,m)

Feb 23 2017 7:00 PM UTC

}// 139/140

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u/Kalanchoe

wow! here's a 103 byte version if you want to add color or something: w=1920;h=1080;f=()=>Math.random()>.5?10:-10;t?x.fillRect((b+=f()+w)%w,(g+=f()+h)%h,10,10):(b=w/2,g=h/2)
u/iverjo

Looks like this dweet is getting "awesomed" a lot due to an exploit in another dweet
u/lionleaf

#random #walk #random_walk
u/taupelink

#randomwalk

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sigveseb

remix of d/308 by u/b4rc0ll0

function u(t) {

a=Math.random;x.f=x.fillRect;t||(W=999,X=Y=U=V=5),U+=a()-.5;V+=a()-.5;x.f(X,Y,9,9),x.f(Y,X,9,9),X+=U,Y+=V,U*=.99,V*=.99,X=(X+W)%W;Y=(Y+W)%W

Jul 22 2016 2:51 AM UTC

}// 139/140

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This is http://dweet.dwitter.net/id/308?autoplay=1 with velocity-based motion.

u/b4rc0ll0

it's the same , i compute a random orientation for the velocity and than apply S and C of it to the point
u/iverjo

b4rc0ll0: This dweet doesn't use S and C. Instead it has variables U and V for horizontal and vertical speed respectively. This makes the speed dynamic. Interestingly, this technique also yields more diagonal motion.
u/Zolden

oh, nice to know someone had similar idea
u/iverjo

#random

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iverjo

remix of d/286 by u/iverjo

function u(t) {

t=t%4;if(t<.1)r=X=Y=0,W=c.width=960,H=540;for(i=W*4;i--;)x.fillRect(X=(X+S(r+=.5-Math.random())%W+W)%W,Y=(Y+C(r)%H+H)%H,A=5/(1+t*9),A)

Jul 21 2016 1:21 PM UTC

}// 134/140

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u/sigveseb

almost looks like a map!
u/joeytwiddle

Whoa! When I was younger I used to have nightmares about this damn thing. I would clean it all away but then it would come creeping back. Weird that you found it in 2016!
u/iverjo

#random

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iverjo

remix of d/268 by u/nkedel

function u(t) {

if(!t)r=0,X=960,Y=540,W=1920,H=1080;x.fillRect(X+=5*S(r+=.5-Math.random()),Y+=5*C(r),5,5),X=((X%W)+W)%W,Y=((Y%H)+H)%H

Jul 21 2016 11:35 AM UTC

}// 117/140

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With wraparound

u/iverjo

#random

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nkedel

function u(t) {

if(t<1||sx>1920||sx<0||sy<0||sy>1080){r=0;sx=960;sy=540;c.width=1920};x.fillRect(sx+=5*S(r+=0.5-Math.random()),sy+=5*C(r),5,5)

Jul 20 2016 9:06 PM UTC

}// 126/140

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u/iverjo

It's mildly entertaining to watch how long the "worm" can keep going without hitting a "wall" :)
u/PhiLho

Also known as "drunk man path" or just "Brownian motion". :-D
u/iverjo

Here's a version with wraparound: http://dweet.dwitter.net/id/286?autoplay=1
u/iverjo

#random

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iverjo

function u(t) {

X=960,Y=540,a=t*2,d=90;for(i=0;i++<9+t;)x.beginPath(),x.moveTo(X,Y),X-=d*S(a),Y-=d*C(a),x.lineTo(X,Y),d*=.9,x.stroke(),a+=Math.random()-.5

Feb 21 2016 9:04 PM UTC

}// 138/140

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#random

u/Purpzie

Shortened by 6 characters: with(x)for(X=960,Y=540,a=t*2,d=90,i=0;i++<9+t;moveTo(X,Y),lineTo(X-=d*S(a),Y-=d*C(a)),stroke(),d*=.9,a+=Math.random()-.5)beginPath()
u/katkip

#plasm
u/joeytwiddle

#organic #plasma
u/UEZ

#iris

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iverjo

function u(t) {

X=Y=999,a=0,d=50*t;for(i=0;i++<6;)x.beginPath(),x.moveTo(X,Y),X-=d*S(a),Y-=d*C(a),i>t&&x.lineTo(X,Y),d*=.6,x.stroke(),a+=Math.random()-.5

Feb 21 2016 9:04 PM UTC

}// 137/140

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#tree #bush

u/iverjo

#random

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iverjo

function u(t) {

x.strokeStyle=R(9,t*23);d=99,X=960,Y=X-d*t,a=0;for(;t++<7;)x.lineTo(X-=d*S(a),Y),d*=.7,x.stroke(),a+=(Math.random()-.5)/(t/5+.3)

Feb 21 2016 9:04 PM UTC

}// 128/140

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#tree

u/iverjo

#random

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iverjo

function u(t) {

x.strokeStyle=R(9,t*23);d=99,X=960,Y=X-d*t,a=0;for(;t++<7;)X-=d*S(a),Y-=d*C(a),x.lineTo(X,Y),d*=.7,x.stroke(),a+=(Math.random()-.5)/(t/5+.3)

Feb 21 2016 9:03 PM UTC

}// 140/140

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It becomes different every time you run it, because it uses Math.random

u/iverjo

#tree #random

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iverjo

function u(t) {

X=Y=960,a=0,d=99*t;for(;t++<7;)x.beginPath(),x.moveTo(X,Y),X-=d*S(a),Y-=d*C(a),x.lineTo(X,Y),d*=.5,x.stroke(),a+=Math.random()-.5

Feb 21 2016 9:02 PM UTC

}// 129/140

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#tree #random

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