JSFiddle - React, Tailwind, and code Playground

by lcndvl

HTML

<h1>Collision Rect-Line</h1>

<ul id='demo'></ul>

<br/><small><a href='http://programando-soft.blogspot.com'>http://programando-soft.blogspot.com</a><small>

JavaScript

/**
 *  http://programando-soft.blogspot.com
 *
 *  Luciano Rasente
 */

/**
 * =====================================
 *  Requeriments
 * ======================================
 */
 
 function point(_x, _y) {
    return {x: _x, y: _y};
 }
 
 /*
 Common vector2 operations
 Author: Tudor Nita | cgrats.com
 Version: 0.51
 */
function Vec2(x_,y_)
{
    this.x = x_;
    this.y = y_;

    this.isVector = true;

    /* vector * scalar */
    this.mulS = function (value){ 	return new Vec2(this.x*value, this.y*value); 		};
    /* vector * vector */
    this.mulV = function(vec_)	{ 	return new Vec2(this.x * vec_.x, this.y * vec_.y);	};
    /* vector / scalar */
    this.divS = function(value)	{ 	return new Vec2(this.x/value,this.y/value); 		};
    /* vector + scalar */
    this.addS = function(value)	{ 	return new Vec2(this.x+value,this.y+value); 		};
    /* vector + vector */
    this.addV  = function(vec_)	{ 	return new Vec2(this.x+vec_.x,this.y+vec_.y);		};
    /* vector - scalar */
    this.subS = function(value) {	return new Vec2(this.x-value, this.y-value);		};
    /* vector - vector */
    this.subV = function(vec_) 	{	return new Vec2(this.x-vec_.x,this.y-vec_.y);		};
    /*	vector absolute */
    this.abs = function() 		{	return new Vec2(Math.abs(this.x),Math.abs(this.y)); };
    /* dot product */
    this.dot = function(vec_) 	{	return (this.x*vec_.x+this.y*vec_.y); 				};
    /* vector length */
    this.length = function()	{	return Math.sqrt(this.dot(this)); 					};
    /* distance between vectors */
    this.dist = function(vec_)  {  	return (vec_.subV(this)).length();					};
    /* vector length, squared */
    this.lengthSqr = function() { 	return this.dot(this); 								};
    /*
     vector linear interpolation
     interpolate between two vectors.
     value should be in 0.0f - 1.0f space
     */
    this.lerp = function(vec_, value) {
        return new Vec2(
            this.x+(vec_.x-this.x)*value,
            this.y+(vec_.y-this.y)*value
        );
   ...