Top #raytracing dweets

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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ciaccodavide

remix of d/23983 by u/pavel

function u(t) {

for(c.width&=i=10368;i--;x.fillRect(i&127,i>>7,f(.7),1))f=n=>(z=5-i/3e3-3*n)>T(Math.hypot(i/64%2-1,i/5e3-n)*9-6*t)?f(n+.6+.3*S(t)):--z*.4

Oct 11 2021 8:13 PM UTC

}// 137/140

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ripple #raytracing #remix

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rodrigo.siqueira

remix of d/18413 by u/pavel

function u(t) {

for(f=c=>S(S(9*c/d)*t),Y=t/3-1,i=2e3;i--;x.fillRect(i,t*180,(1+f(X)*f(Y))*(d/2+Y),3))X=i/480-2,r=X*X+Y*Y,x.fillStyle=R(C(r)*120),d=r>1||T(r)

Apr 23 2020 3:35 PM UTC

}// 140/140

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Red Sphere Reflection #raytracing

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pavel

function u(t) {

for(c.width&=i=8320;i--;)x.fillRect(X=i&127,i>>7,1,Math.min(...[0,2,4].map(a=>1.4-S(a+=4*t)/6-(.4-Math.hypot(X/32-2+C(a),i/4e3-1))**.3||1)))

Jul 22 2022 11:07 PM UTC

}// 140/140

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The Three-Body Problem

u/pavel

#raytracing

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jpgravel

function u(t) {

eval(unescape(escape`𩠽𚁵𛁶𛁷𚐽🡷🠱𙠦𤰨𭐯𭰩𚡷𚱦𚁵𚠴𛰵𚱶𚠳𛰵𛀭𭐪𜰯𝐫𭠪𝀯𝐬𭰯𜠩𞱦𫱲𚁣𛡷𪑤𭁨👩👗🐱𜠸𞰭𛑩𞰩𩡯𬠨𪠽𜀻𚰫𪠼𥰻𚑷👦𚁩𚠶𛁪𚠱𜀭𭀪𝀰𛁗𚐫𥰬𮀮𩡩𫁬𤱴𮑬𩐽𤠨𭰪𛠸𛁷𚠮𝰬𭰼𜀦𙡗𯁼𭰪𛠶𚐬𮀮𩡩𫁬𤡥𨱴𚁩𛁪𛑷𛰹𛀱𛁷𛰹𚐊`.replace(/u../g,'')))

Aug 31 2022 4:11 AM UTC

}// 135/140

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Mountain range #raytracing #landscape

u/KilledByAPixel

nice!
u/jellyedwards

Amazing!

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pavel

remix of d/23980 by u/primo

function u(t) {

for(c.width&=i=10368;i--;x.fillRect(i&127,i>>7,f(.6),1))f=n=>6-n*i/3e3-6*n>S(Math.hypot(i/64%2-1,i/5e3-2.2+1/n)*12*n-8*t)?f(n+.02):n/.7-.7

Oct 3 2021 11:54 PM UTC

}// 138/140

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#raytracing z = sin(sqrt(x*x + y*y) - t)

u/pavel

Also a pretty generic ray tracing 'engine.' Change f to trace other things.
u/pavel

Style remix, no idea how the code I'm remixing works yet. It does not look to do ray tracing so its clearly better.
u/primo

The original uses z + ∂/∂y z for saturation, which looks about right tilted at or near ~26.5°.
u/pavel

for(c.width&=i=10368;i--;x.fillRect(i&127,i>>7,f(.7),1))f=n=>(z=5-i/3e3-3*n)>S(Math.hypot(i/64%2-1,i/5e3-n)*9-6*t)?f(n+.03):--z*.4 is a better one, no weird view prism.

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jpgravel

remix of d/26069 by u/jpgravel

function u(t) {

eval(unescape(escape`𩠽𚁵𛁶𛁷𚐽🡷🠱𙠦𤰨𭐯𭰩𚡷𚱦𚁵𚠮𞀫𭠪𛠶𛀭𭐪𛠶𚱶𚠮𞀬𭰪𛠷𚐻𩡯𬠨𨰮𭱩𩁴𪀽𪐽𥰽𜐲𞀻𛐭𪐻𚑦𫱲𚁪🐰𞰫𚱪🁗𞰩𭰽𩠨𚁩𛑗𛰲𚐯𚁪𚰹𚐪𥰭𭀪𝀰𛁪𚠹𛑴𚠷𜀬𥰩𛁸𛡦𪑬𫁓𭁹𫁥👒𚁷𚠮𞐬𭰪𛠸𛁷🀰🱗𞡷𚠮𝰩𛁸𛡦𪑬𫁒𩑣𭀨𪐬𪠫𞐭𭰯𞐬𜐬𭰯𞐩`.replace(/u../g,'')))

Aug 31 2022 6:24 AM UTC

}// 140/140

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Mountain rivers #raytracing #landscape

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Tekmap

remix of d/18441 by u/tomxor

function u(t) {

for(w=c.width=180,i=9e4;i--;x.fillRect(i%w,i/w,1+C(7*X/d)**7*S(9*Y/d)**5,d/2+Y/3))X=i%w/35-2,Y=i/w/35-1,r=X*X+Y*Y,d=r>1||1+(1-r)*C(r*9-t*8)

Jun 22 2021 3:53 AM UTC

}// 139/140

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Bubble

u/donbright

#blackmagic
u/donbright

this is bind blowing
u/donbright

mind blowing
u/aleamb

WTF! how? #render #witchcraft #raytracing #scene
u/rep_movsd

#underrated

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yonatan

function u(t) {

for(i=2e3;i--;)Y=frame/500-1,X=i/500-2,s=X+Y+(q=1-X*X-Y*Y)**.5,x.fillRect(i,frame,q<0?1:s>1?0:1-s,1)

Oct 29 2020 11:34 PM UTC

}// 100/140

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lit sphere via https://twitter.com/kamoshika_vrc/status/132…

u/joeytwiddle

#sphere
u/joeytwiddle

#sphere #lighting #raytracing
u/tomxor

Nice!

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rodrigo.siqueira

remix of d/18445 by u/pavel

function u(t) {

for(X=f=c=>C(T(4*c/d)),Y=t/8-1.1,i=2e3;i--;x.fillRect(i,t*60,(1+f(X=i/480-2)*f(Y))/2,3))x.fillStyle=R(S(Y)*99,0,C(r=X*X+Y*Y)*99),d=r<0||S(r)

Apr 25 2020 6:31 PM UTC

}// 140/140

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Towards Infinity (Escher-like tilings) mirror #sphere #raytracing

u/KilledByAPixel

👍
u/joeytwiddle

#shiny

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rodrigo.siqueira

remix of d/18461 by u/rodrigo.siqueira

function u(t) {

for(X=f=c=>C(T(4*c/d)),Y=t/8-1,i=2e3;i--;x.fillRect(i,t*60,1+f(X=i/480-2)*f(Y)/d,3))x.fillStyle=R(K=C(r=X*X+Y*Y)*200,0,S(K)*80),d=r>1||C(r)

Apr 24 2020 12:57 AM UTC

}// 139/140

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Hello Dave (HAL 9000) #raytracing #glass #sphere

u/Xen

love it
u/13thptr

incredible

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