Dweets awesomed by u/scottglz

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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scottglz

remix of d/2329 by u/sfz

function u(t) {

x.fillRect(0,0,z=1e9,z);for(i=h=540;i--;x.clearRect(2*h+2*o.x*O-o.y*I,h-o.y*O-o.x*I/3,7,4))I=S(t-i),O=C(t-i),o=t?u[i]:u[i]={x:z*i%h,y:z/i%h}

Mar 29 2017 1:58 AM UTC

}// 140/140

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The stars cried out for spacification

u/sfz

sweet!
u/donbright

super
u/Cloud

#fly

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nystrand

function u(t) {

p=t?(c.width|=n=960,p.push([7,n*S(t)]),p.map(([a,b,d=0,e=b])=>[f=a+a-d,g=b+b-e,f>n?f+6:a,f>0&g<0?g+g:b+.3,x.fillRect(500+a,n-b,22,22)])):[]

Mar 28 2017 4:58 PM UTC

}// 139/140

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u/donbright

excellent
u/katkip

#physics

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sfz

function u(t) {

c.width|=h=540
D=new Date
for(i=h;i--;)I=S(t-i),O=C(t-i),o=!t?u[i]={x:D*i%h,y:D/i%h}:u[i],x.fillRect(2*h+2*o.x*O-o.y*I,h-o.y*O-o.x*I/3,7,4)

Mar 28 2017 7:48 AM UTC

}// 139/140

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Negative galaxy timelapse

u/sfz

if you want to get a laugh and ruin the magic, remove the -i from I and Our :}
u/sfz

*O
u/donbright

lol nice

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cantelope

function u(t) {

c.width=1920;x.fillStyle="red";g=540;for(i=0;i<g;p=i-t,l=S(p)*i,Z=g-l*C(t),s=g*9/Z,x.fillRect(960+18/(Z*18)*l*S(t)*g,g+C(p)*i/Z*g,s,s),++i);

Mar 26 2017 2:54 AM UTC

}// 140/140

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u/innovati

it's like a sunflower pattern :D

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nonce

function u(t) {

with(x)font='950px o',lineWidth=30,strokeStyle=`hsl(${t*50%360},99%,50%)`,setLineDash([9,3e3]),lineDashOffset=t*120,strokeText('I❤U',9,880);

Mar 25 2017 5:45 PM UTC

}// 140/140

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u/tapgiles

In Chrome, the text is too large, and the heart never shows up. Pretty awesome idea, though.
u/recursive

It shows perfectly for me in Chrome on Windows.
u/nonce

I so wish I could fix the font here. Sadly it has to go with whatever default font you have. If someone could golf this down by 4 chars we could do font='950px Arial'
u/New_Core

with(x)font='25cm Arial',lineWidth=30,strokeStyle=hsl(${t*50},99%,50%),setLineDash([9,3e3]),lineDashOffset=t*120,strokeText('I❤U',9,880);
u/joeytwiddle

#text

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donbright

remix of d/1816 by u/SpecialAgent

function u(t) {

t?Δ=[]:P=[99,0,0,0,1,0,0,.6]
for(Q=i=4;i--;)Q+=(Δ[i]=P[(2+i)%4]-P[i])**2/2
for(j=4;j--;)x.fillRect(P[i=j*2],P[i+1],2,2),P[j]+=P[j+4]+=Δ[j]/Q

Mar 24 2017 11:16 PM UTC

}// 140/140

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Quickstart - alter numbers in P for fun patterns. Long description - this is a simulation of two body gravitational motion using a simplified form of Calculus.

u/donbright

combine F=ma with F=GM1M2/R^2 except that G=1, M1=1, M2=1 and r^2 is r
u/donbright

Explanation here https://www.patreon.com/posts/simulating-in-…
u/donbright

oh btw P[x1,y1,x2,y2,xv1,yv1,xv1,yv2] where 1,2 = object 1,2, x,y=position, v = velocity initial
u/codeslaw

This is incredible!
u/donbright

#physics

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scottglz

remix of d/2282 by u/scottglz

function u(t) {

with(Math)for(X=22;X--;)for(Y=16;Y--;x.fillRect(X*67,Y*67,67,67))D=min(abs(X-7.5),abs(Y-7.5)),x.fillStyle=D<1?'#002664':D<2?'#fff':'#ED2939'

Mar 24 2017 10:37 PM UTC

}// 140/140

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This one has the correct proportions of everything and also the exact colors (at least accoring to https://en.wikipedia.org/wiki/Flag_of_Norway)

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scottglz

function u(t) {

with(Math)for(X=43;X--;)for(Q=Y=31;Y--;x.fillRect(X*Q,(Y+2+S(X/6))*Q,Q,Q))D=min(abs(X-15),abs(Y-15)),x.fillStyle=D<2?'#026':D<4?'#fff':'red'

Mar 23 2017 7:49 PM UTC

}// 140/140

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Everybody loves Norwegian flags.

u/mxfh

nice, https://www.dwitter.net/d/2113 check the ratios link in the dweets comments
u/scottglz

Right, I'm using the 6,1,2,12 ratios?
u/scottglz

Oh, her, I thought I was, but I see now they got messed up somewhere. Thanks.
u/scottglz

Grr not her

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thespite

remix of d/2280 by u/thespite

function u(t) {

w=1920,h=1080,c.width=w,d=.5;for(a=-d;a<d;a+=.02)for(b=-d;b<d;b+=.02){x.fillRect((d+a)*w,(d+b+.15*C(10*Math.sqrt(a*a+b*b)-2*t))*h,40,10)}

Mar 23 2017 6:43 PM UTC

}// 137/140

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scottglz

remix of d/2265 by u/tapgiles

function u(t) {

with(x)lineWidth=3,fillStyle=`hsl(${t*99%360},100%,50%)`,beginPath(),arc(t*1e4%1920,0,100,0,7),fill(),stroke(),drawImage(c,0,0,1920,1123.2)

Mar 23 2017 5:51 PM UTC

}// 139/140

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