Dweets by u/rodrigo.siqueira

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: #Food

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rodrigo.siqueira

remix of d/18262 by u/KilledByAPixel

function u(t) {

c.style.filter=`sepia()invert(`
for(P=j=2e4;j--;j%99||(T=P=S(t+j)*2,R=C=T*2))
P=P*P-C*C+(C=2*C*P+R,T),x.fillRect(C*450+960,P*450+700,1,1)

Apr 15 2020 12:59 AM UTC

}// 137/140

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Particle collision inside a hadron collider #particles

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rodrigo.siqueira

remix of d/17524 by u/DaSpider

function u(t) {

c.width|=w=n=44
for(e=[i=w*w];i--;S=9)for(;S--;n+=T[i%w+i+S*w]|0,e[i]=n%3,x.fillRect(i%w*w,i,w*T[i],w));T=e

Apr 12 2020 9:59 PM UTC

}// 107/140

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Primordial soup #gameoflife (with changed rules to fit 107 bytes). Homage to John Conway (1937-2020), the creator of Game of Life and cellular automata, seed of ideas for Artificial Life, emergence, self-organization and complexity.

u/tomxor

Farewell John Conway, not his favorite discovery, none the less responsible for generations of programmers enjoyment.

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rodrigo.siqueira

remix of d/17637 by u/rodrigo.siqueira

function u(t) {

c.style='filter:invert('
for(A=a=b=0,i=1e4*(t<4);i--;)a+=2*(S(t*i**7)<0)-a/3+b*S(a),b+=C(A)/2+.3-S(b/3),A=a,x.fillRect(a*440-400,b*990,.4,1)

Apr 10 2020 9:22 PM UTC

}// 140/140

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Ethereal Figures #art

u/KilledByAPixel

👍
u/rep_movsd

#underrated

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rodrigo.siqueira

remix of d/18139 by u/cantelope

function u(t) {

for(c.width|=j=37;j--;)for(w=i=133;i--;)[j,j+1].map(k=>x.lineTo(960+S(p=i/7+t)*k/(Z=w+C(p)*k*3.4)*2e3,(58-k)**3/Z+j))
x.stroke()

Apr 6 2020 12:08 PM UTC

}// 128/140

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128 bytes #vortex #d3 #uncompressed

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rodrigo.siqueira

remix of d/18142 by u/pavel

function u(t) {

for(c.width=i=620;i--;x.lineTo(300*(z+p*b)/z,300*(2+q*S(a*3+t*3))/z))q=i/4&1||-1,p=3-q*S(a=b=i/99),z=4+p*S(b-=t%8);x.stroke()

Apr 5 2020 5:37 PM UTC

}// 125/140

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DNA double helix #spiral #dna

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rodrigo.siqueira

remix of d/18136 by u/rodrigo.siqueira

function u(t) {

for(c.width|=w=960,i=1e3;i--;x.lineTo(w+w*X/Z,w*Y/Z))
U=i*182+t,
V=C(i)*C(U/2+t),
X=3*C(U)+V*C(U),
Y=2*S(U)+V*S(U)-3,
Z=V-6.5
x.stroke()

Apr 5 2020 3:09 AM UTC

}// 136/140

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Variation of a #mobius strip

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rodrigo.siqueira

remix of d/16794 by u/rodrigo.siqueira

function u(t) {

for(c.width|=w=960,i=3e3;i--;)
X=(3+C(U=i/9))*S(U*2-t),
Y=(1+C(U+t*2))*C(U*2+t)-3,
Z=S(U*166)-S(t)-6,
x.lineTo(w+w*X/Z,w*Y/Z);x.stroke()

Apr 4 2020 12:12 AM UTC

}// 136/140

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I was trying to make the #Mobius strip but I got this instead.

u/katkip

still beautiful
u/rep_movsd

#underrated

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rodrigo.siqueira

function u(t) {

for(i=1e4*(t<5);i--;x.fillRect(960+260*a,540+260*b,.1,1))
S(r=i*t)>0?(a=S(r*i)*3,b=C(r*t)*2):b=C(a)-(a=S(-b)/2+a/2)/4
x.fillStyle=R(99)

Apr 2 2020 6:39 PM UTC

}// 135/140

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Dove on canvas

u/joeytwiddle

Cool non-uniform effect #bird #chaos #stochastic

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rodrigo.siqueira

remix of d/13665 by u/rodrigo.siqueira

function u(t) {

for(w=i=960;i--;x.fillRect(w+w*X/Z,w-w*Y/Z,s=20/Z/Z,t<7))Y=1.2*S(U=i/t)+T(i)**2-4.5,X=2*C(U)*(Y*(S(Y/2)/4)+.1),Z=S(U)*2-6,x.fillStyle=R(i/5)

Mar 31 2020 1:20 PM UTC

}// 140/140

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Wine #glass

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rodrigo.siqueira

remix of d/17953 by u/tomxor

function u(t) {

c.width=-1;for(i=2e3;m=i&1,v=(K=t%2)<1?25:K%1*99**1.1,p=i%3*3,i--;)x.fillRect(150+p*S(P=i**.7)+v*C(V=i**.5+t),78+p*C(P)+v*S(V)*C(!p*i),1,1)

Mar 16 2020 11:30 AM UTC

}// 139/140

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Blowing The Enemy #coronavirus

Show more comments…
u/WorldMerge

This is really cool! Does setting the canvas width to -1 make it full-width?
u/rodrigo.siqueira

c.width=-1 is a trick I saw here (probably from u/pavel) that makes width=300 pixels. I used throw(c.width) to see "300". So it's a compact form to create a medium-low resolution image.
u/tomxor

300px is the default canvas width. What's particularly odd is that while setting negative numbers causes default value, everything else that ordinarily coerces to NaN will result in 0. e.g throw Number({}).toString() // NaN c.width={}; throw c.width.toString() // 0
u/tomxor

I guess in c++ land width has outofrange=300 and NaN=0
u/katkip

looks good
u/katkip

but dangerous

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