Dweets by u/cantelope

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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cantelope

function u(t) {

w=c.width=400
for(i=8;i--;X=w/2+(Z=1/(2+C(p=1.047*i*2+(i<4)+t)))*S(p)*w/2,Y=Z*w/2-w/20,i==3?x.moveTo(X,Y):x.lineTo(X,Y),x.stroke());

Apr 9 2017 10:23 PM UTC

}// 132/140

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🕎 Shalom! 🕎

u/donbright

great use of perspective

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cantelope

function u(t) {

w=c.width=500
x.fillRect(0,0,w,w)
x.strokeStyle="red"
for(i=6;i--;x.lineTo(w/2+(Z=1/(2+C(p=1.257*i*2+t)))*S(p)*w/2,Z*w/2-w/20),x.stroke());

Apr 9 2017 9:39 PM UTC

}// 139/140

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\m/ (>.<) \m/

u/cantelope

it's fun to adjust the c.width=X value. for low values it gets very blocky, but shape position should not be affected.
u/donbright

adjust c.width with mouse: t?w=c.width=n:n=1 onmousemove=e=>n=e.pageY for(i=6;i--;x.lineTo(w/2+(Z=1/(2+C(p=1.257*i*2+t)))*S(p)*w/2,Z*w/2-w/20),x.stroke());
u/cantelope

@donbright lol excellent https://www.dwitter.net/d/2459

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cantelope

remix of d/2452 by u/cantelope

function u(t) {

w=(c.width|=0)/2
x.fillStyle="#64f"
for(i=2e3;i--;x.fillRect(w+S(p=i+t)/(Z=4+C(p)*(h=1+S(i/99-t*4)/2))*w*h,540+1/Z*(i-999)*w/300,s=40/Z,s));

Apr 9 2017 6:17 AM UTC

}// 140/140

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u/magna

<3
u/donbright

loved it, remix w mouse control https://www.dwitter.net/d/2460

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cantelope

remix of d/2451 by u/cantelope

function u(t) {

w=(c.width|=0)/2
for(i=99;i--;x.fillStyle=`hsl(${t*99+i},99%,50%`,x.fillRect(w+1/(Z=3+C(p=i-t*2))*(i-50)*w/30,540+S(p)/Z*w,s=250/(Z*Z),s));

Apr 9 2017 4:58 AM UTC

}// 139/140

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cantelope

remix of d/2449 by u/cantelope

function u(t) {

x.globalAlpha=.1
x.fillRect(0,0,(w=960)*2,w*2)
for(i=99;i--;p=.2*i+t,x.clearRect(w+1/(Z=3+C(p))*(i-50)*w/20,540+S(p)/Z*w,s=199/(Z*Z),s));

Apr 9 2017 2:07 AM UTC

}// 137/140

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u/donbright

wow
u/magna

I love this series.
u/magna

Golfed down by 5 characters: https://www.dwitter.net/d/2454
u/lionleaf

#perspective #spiral

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cantelope

function u(t) {

x.globalAlpha=.1
x.fillRect(0,0,(w=960)*2,w*2)
for(i=18;i--;p=.7*i+t,x.clearRect(w+1/(Z=3+C(p))*S(p)*w,540+(i<9?.4:-.5)/Z*w,s=199/(Z*Z),s));

Apr 9 2017 12:54 AM UTC

}// 140/140

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fixed a FF bug. apparently it doesn't like the syntax Z**2

u/donbright

this has a really cool look

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cantelope

function u(t) {

w=c.width
x.font=w/3+"px a"
x.fillStyle=R(w,w,0)
x.fillText('★★★',w/9,w/2.6)
c.style.transform=`perspective(300px)rotate3d(0,1,0,${t/3}turn`

Apr 7 2017 1:14 AM UTC

}// 140/140

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u/magna

Thanks! ;)

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cantelope

remix of d/2394 by u/Jenky

function u(t) {

t||(w=c.width=568)
with(x)onmousemove=e=>lineTo(X=e.pageX,Y=e.pageY),fillStyle=R(Y,X,Y,.2),fillRect(0,0,w,w),beginPath(stroke()),moveTo(X,Y)

Apr 6 2017 2:13 AM UTC

}// 140/140

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If you set canvas.width to client.width, you can remove the bit that fixes the mouse position. This one only works at the default width (not fullscreen) because I had to hard-code the canvas width to make room for the fade effect. Nesting stroke inside beginPath saved 1 crucial byte. :)

u/cantelope

canvas.clientWidth rather
u/cantelope

i will give 3 gold stars to anyone who can fix the initial "Y is not defined" error :D
u/magna

Since your dweet doesn't use trig, we can hijack C and S as declared variables: https://www.dwitter.net/d/2429
u/magna

Can save another 2 bytes by: R(Y,X,fillRect(0,0,w,w),.2,beginPath(stroke()),moveTo(X,Y))

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cantelope

remix of d/2392 by u/nonce

function u(t) {

k=frame,p=q=0
for(s=1;s<32;s*=2){a=1&k/2;b=1&k^a
if(!b){if(a)p=s-1-p,q=s-1-q;[p,q]=[q,p]}p+=s*a;q+=s*b
k=k>>2}x.lineTo(p<<5,q<<5),x.stroke()

Apr 2 2017 8:13 PM UTC

}// 140/140

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looks best fullscreen

u/donbright

these are great!!!

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cantelope

remix of d/2391 by u/mxfh

function u(t) {

s='l141 242h-280'
x.fill(new Path2D(`M960 299${s+s}m420-242`+s))
c.style.transform=`perspective(200px)rotate3d(1,1,1,${S(t)}turn`

Apr 2 2017 6:32 PM UTC

}// 129/140

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yay! ok i'm done with the triforce. :D

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