# 2D SDF tests

## Size Coding variation

### Code

``````
<canvas id="c">
<script>
c=document.getElementById("c").getContext("2d") // Obtain a canvas context
t=p=10 /* start the time at 10, and the matrix size as 10 */
o=t*t
/* We use various math functions (sin and pow) a few times, so alias to save
bytes*/
m=Math
j=m.pow
s=m.sin
/* Run this code every `p` microseconds */
setInterval(e=>{
t+=1/o /* */
c.clearRect(0,0,150,150); /* Clear the screen */
/* Loop through the 10*10 matrix */
for(x=0;x<o;x++) {
k=8*s(j(x%p/p-s(t),2)+j(x/p/p+s(t),2))
/* Draw a rectange at the correct x position, with a slight offset
to the y. The rectange varies it's height based on how intense the
point is */
c.fillRect(x%p*p,x,p/2,p/2-k)
}
} , p);
</script>
</canvas>

``````

### Minified

``````<canvas id="c"><script>c=document.getElementById("c").getContext("2d"),t=p=10,o=t*t,m=Math,setInterval(e=>{for(t+=1/o,c.clearRect(0,0,150,150),x=0;x<o;x++)j=m.pow,s=m.sin,k=8*s(j(x%p/p-s(t),2)+j(x/p/p+s(t),2)),c.fillRect(x%p*p,x,p/2,p/2-k)},p);</script></canvas>
``````

Last update: August 8, 2020