Is point inside triangle - 2

A short algo for detecting whether point inside, on or outside triangle

by Ibrahim Tanyalcin

HTML

<div class="container">
  <div id="perf"></div>
</div>

CSS

canvas {
  width: 100%;
  height: 100%;
  display: block;
}

JavaScript

/*
w = canvas width,
h = canvas height,
dotW = dot width,
dotH = dot height,
epsilon = a percentage err margin,
					to calculate whether 
          point is on triangle 
*/
!function(w,h,dotW,dotH,epsilon){
	/*################################
  ##############INLINES#############
  ##################################*/
  let perf = void(0);
  const perfDiv = document.getElementById("perf"),
  			canvas = document.body
        		.firstElementChild
            .appendChild(document.createElement("canvas")),
  			halfDotW = dotW / 2,
        halfDotH = dotH / 2,
        dotGen = (col) => {
        	const canvasDot = document.createElement("canvas"),
          			ctx = canvasDot.getContext("2d");
          canvasDot.width = dotW;
          canvasDot.height = dotH;
          ctx.beginPath();
          ctx.arc(
          	halfDotW, 
            halfDotH, 
            Math.min(halfDotW,halfDotH),
            0,
            2 * Math.PI
          );
          ctx.fillStyle = col;
          ctx.fill();
          return canvasDot;
        },
        dots = {black:dotGen("Black"),blue:dotGen("Blue")},
  			context = canvas.getContext("2d"),
        svg = document.createElementNS("http://www.w3.org/2000/svg","svg"),
        raf = window.requestAnimationFrame,
        set = (ctx) => (p,v) => {
          ctx[p] = v;
          return {
            set: set(ctx),
            comm: comm(ctx)
          }
        },
        comm = (ctx) => (c,...args) => {
         ctx[c].apply(ctx,args);
         return {
           set: set(ctx),
           comm: comm(ctx)
         }
        };
        
  //(g)et(B)ounding(C)lient(R)ect
  let gbcr = null;
  canvas._busy =  false;
  canvas.width = w;
  canvas.height = h;
 	drawTriangle();
  
  /*################################
  ########RENDER SCENE THROTTLE#####
  ##################################*/
  canvas.addEventListener("mousemove",function(e){
  		if(canvas._busy){return}
      const p = getCoord(e),
      			isInside = insideTriangle(
    ...