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π₯ Implementing the Cylinder Trick
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<canvas id=c><script>c.width=c.height=1080;x=c.getContext`2d`,F=M=0,onload=U=e=>{requestAnimationFrame(U);if(F&&e<M-2)return;M=Math.max(M+1e3/60,e);T=F/60;if(T*60|0!=F++)T+=1e-6;E(T)};E=t=>{ | |
S=Math.sin; | |
//Inside a cylinder trick | |
//https://youtu.be/6XtrgFPoZ2E?si=ucjJgzsH8UVdsH11&t=64 | |
c.width|=0;x.font="2cm'" | |
x.fillText('β½',0,70) | |
for(i=70;i--;)for(j=2;j--;)x.drawImage(c, | |
S(i/28)*10-4,(i+t*99)%99,99,1, //Source (sx,sy,sW,sH) | |
j*495,i*9+99,495,9 //Destination (dx,dy,dW,dH) | |
); | |
for(i=99;i--;)x.fillRect(100+S(i/28)*20,i, 5, 1); | |
//sx,sy,sW,sH (Source position, width, & height) | |
//dx,dy,dW,dH (Destination position, width, & height) | |
//drawImage(image,sx,sy, sWidth, sHeight, dx, dy, dWidth, dHeight) | |
}</script><style>html,body{background:#222;display:flex;justify-content:center;align-items:center;height:100%;margin:0}#c{background:white;max-height:100%;max-width:100%} |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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<canvas id=c><script>c.width=c.height=1080;x=c.getContext`2d`,F=M=0,onload=U=e=>{requestAnimationFrame(U);if(F&&e<M-2)return;M=Math.max(M+1e3/60,e);T=F/60;if(T*60|0!=F++)T+=1e-6;E(T)};E=t=>{ | |
c.width|=0 | |
for(i=99;i--;)x.fillRect((1e3-(i-35)**2)**.5*9, i*9+99,9,9) | |
}</script><style>html,body{background:#222;display:flex;justify-content:center;align-items:center;height:100%;margin:0}#c{background:white;max-height:100%;max-width:100%} |
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