Hot dweets by u/andrea270872

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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Current theme challenge: #Opposites

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andrea270872

function u(t) {

a=~~t
b=~~(t%1*10)
x.setTransform(A=a*9,B=b*9,-B,A,800,600)
for(i=-7;i++<7;)for(j=14;j--;x.fillRect(i,j-7,.05,.05));

Jun 27 2019 8:25 AM UTC

}// 116/140

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Sieve of Eratosthene for Gauss Integers - all white pixels left will be Gauss Primes

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andrea270872

remix of d/12954 by u/andrea270872

function u(t) {

c.width=2e3+S(t)*99
for(j=1;j++<9;x.fillStyle='#02'+j)for(i=9;i--;){F=(S(i)*C(i/9+j+t))**.1;x.fillRect((i+j/8)*200,50*j-F*10,190,80*j+F*20)}

Apr 1 2019 7:08 PM UTC

}// 140/140

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Running in the maze v3

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andrea270872

function u(t) {

c.width+=C(t)
for(j=1;j++<9;x.fillStyle='#02'+j)for(i=18;i--;){F=(S(i/2)*C(i/4+j+t))**.1;x.fillRect((i+j/8)*98,50*j-F*10,99,80*j+F*20)}

Apr 1 2019 6:44 PM UTC

}// 135/140

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Running in the maze

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andrea270872

remix of d/12954 by u/andrea270872

function u(t) {

c.width+=C(t)*2
for(j=1;j++<9;x.fillStyle='#03'+j)for(i=18;--i;){F=(S(i/9)*C(i/9+j+t/2))**.1;x.fillRect((i+j/8)*98,50*j-F*10,99,50*j+F*20)}

Apr 1 2019 7:16 PM UTC

}// 139/140

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A bit better maze

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andrea270872

remix of d/12953 by u/andrea270872

function u(t) {

c.width+=C(t)*2
for(j=1;j++<9;x.fillStyle='#02'+j)for(i=18;i--;){F=(S(i/2)*C(i/4+j+t))**.1;x.fillRect((i+j/8)*98,50*j-F*10,99,80*j+F*20)}

Apr 1 2019 6:57 PM UTC

}// 137/140

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Running in the maze (with more balanced "zoom")

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andrea270872

function u(t) {

c.width|=0
x.fillStyle=`hsl(${S(t)*60%60},99%,50%,.7`
for(j=9;j--;)for(i=24;i-=2;)x.fillRect(99+(j*3+C((j+i+t)*9))*60,1e3-i*40,288-i*12,80)

Mar 29 2019 1:22 PM UTC

}// 139/140

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fire tentacles

u/joeytwiddle

#fire simple idea nice effect
u/rodrigo.siqueira

#tentacle

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andrea270872

function u(t) {

U=frame%20
if(U==1)K=[B=++t%2-1,A=S(t),-A,B,1e3,500,x.resetTransform()]
x.transform(...K)
x.fillStyle='#E'+U*U
x.fillRect(0,0,99,70)

Mar 26 2019 7:09 PM UTC

}// 132/140

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random affine transforms + colors

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andrea270872

function u(t) {

r=Math.random
if(frame%19==1)K=[B=r()*2-1,A=S(t),-A,B,1e3,500,x.resetTransform()]
x.transform(...K)
x.strokeRect(0,0,40,40)

Mar 26 2019 6:07 PM UTC

}// 123/140

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random affine transforms

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andrea270872

function u(t) {

c.onclick=_=>{T=9}
x.fillRect(0,0,2e3,2e3)
T|=0
A=T?(T--/9)**2*30:50
for(i=30;i--;x.fillText('👀',(t+i)%7*300-A,S(i)*i*40))x.font=A+i+"px'"

Mar 23 2019 9:25 PM UTC

}// 138/140

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Blinking eyes (click to make them blink)

u/andrea270872

#interactive

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andrea270872

function u(t) {

c.width|=c.onmouseup=_=>{B=-B}
if(t==0)A=B=1
A+=B*.033
for(i=1e3;i--;)x.fillRect((A*2+i)%40*40,~~(i/40)*43,20,i%9)

Mar 24 2019 11:55 AM UTC

}// 114/140

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click to rewind

u/andrea270872

#interactive

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