🎨🖱️ Tiny Canvas Paint Dweet (click drag… by lewdev

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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lewdev

remix of d/34375 by u/lewdev

function u(t) {

onmousedown=onmouseup=e=>x.beginPath(A=e.buttons)
onmousemove=e=>A&&x.lineTo(e.x*(s=c.width/innerWidth),e.y*s),x.stroke()

Oct 3 2025 8:47 PM UTC

}// 121/140

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🎨🖱️ Tiny Canvas Paint Dweet (click drag to draw)

u/ximavus

You did it! This was a big goal on my original paint project to click and paint instead of automatically painting
u/ximavus

You can put also onkeydown=e=>c.width|=0 at the end to add clearing by pressing keys


      u(t) is called 60 times per second.
      t: elapsed time in seconds.
      c: A 1920x1080 canvas.
      x: A 2D context for that canvas.
      S: Math.sin
      C: Math.cos
      T: Math.tan
      R: Generates rgba-strings, ex.: R(255, 255, 255, 0.5)

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