Dweets awesomed by u/Erazed

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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davidsharp

remix of d/6887 by u/davidsharp

function u(t) {

x.fillRect(0,0,2e3,2e3)
for(i=0;i<64;){n=C(6*S(t)+(++i*3))*130
x.fillStyle=R(n*3,n*2,n*2)
x.fillRect(i*30,400+n,27,300)}

Feb 13 2018 9:57 AM UTC

}// 120/140

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aleamb

function u(t) {

M=Math;a=65025,c.width=w=255;v=w/2;for(;a--;)e=a&w,f=a/w,d=(7650/M.sqrt((s=e-v)*s+(z=f-v)*z)),g=M.atan2(f,e),d+t*99&f&&x.fillRect(e,f,1,1)

Jan 19 2018 1:33 PM UTC

}// 138/140

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My first dwitt. Sierpinski triangles on tunnel effect, more or less.

u/joeytwiddle

Reminds me of the black hole in Interstellar >.<
u/aleamb

#sierpinski #tunnel

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BackendForth

function u(t) {

c.width=1920
for(j=-t*99;j<1080+t*99;j+=60)
for(i=0;i<1920;i++)
{
x.fillStyle=R(0,j*9%256,0)
x.fillRect(i,j+99*S(t+i/99)+i%(t*99),2,6)
}

Jan 6 2018 8:13 PM UTC

}// 136/140

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Agnes

function u(t) {

h=540;w=1920;x.fillRect(i=0,0,w,w);for(i;i<w;i++){d=1-i/w;x.fillStyle=R(t*d,f=255*d,f,1-d);x.fillRect(.5*(w+w*C(t*d)),h+h*S(t**d-d),9*d,9)}

Jan 6 2018 5:05 PM UTC

}// 139/140

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u/Xen

nice style

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Agnes

function u(t) {

c.width=w=1920;w/=2;h=540;for(i=1;i<w;i++){d=i/w;x.fillStyle=R(f=255*d,255-f,f,d);x.fillRect(w+w*S(t+i)*C(t+d),h+2*h*C(t+d)*S(t+d),9*d,9*d)}

Jan 6 2018 3:55 PM UTC

}// 140/140

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trupples

function u(t) {

t?c.width|=0:X=Y=0
X+=(G=navigator.getGamepads()[0]).axes[0]
Y+=G.axes[1]
x.fillRect(X,Y,100,100)

Jan 6 2018 2:16 PM UTC

}// 97/140

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Gamepad input! Without the x.fillRect statement you've got 67 usable chars

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frostycpu

function u(t) {

c.width=400;
for(i=648;i--;){x.fillStyle=R(255-9*(m=S(t*10-(n=i%36))),b=255*(~~(i/216)==1)-9*m,b)
x.fillRect(99+5*n,75+5*~~(i/36)+m,5,6)}

Jan 6 2018 1:02 PM UTC

}// 137/140

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u/sigveseb

Nice shading
u/iverjo

#flag

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function u(t) {

c.width+=0
x.lineWidth=4
for(i=0;i<480;i++){for(p=1,s=0;p<=t%16+1;p+=t%32>16?2:1)s+=S((i/30+4*t)*p)*1/p
x.lineTo(4*i,540-250*s)}x.stroke()

Jan 6 2018 10:08 AM UTC

}// 138/140

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Additive synthesis of sawtooth and square waves

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jonathan_b

remix of d/5615 by u/jonathan_b

function u(t) {

for(c.width|=s=i=1e3;--i;)k=S(i*2+t)+1,x.fillStyle=R(r=s*S(k+t+i),i/4,i*k,k+.05),x.fillRect(s+s*C(i)*C(k+S(i)),s/2+s/2*S(i*3)*S(k),25,70)

Jan 6 2018 8:10 AM UTC

}// 137/140

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logomach

function u(t) {

c.width|=0;for(i=m=2000;i--;)x.fillRect(960+i-m/2+200*S(i/m)+S(i+t)*30,540+i-m/2+200*C(t+i*3.12/3)+C(t-i*2)*8,10,10)

Jan 6 2018 8:02 AM UTC

}// 116/140

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u/sigveseb

Nice

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