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July 16, 2019 22:41
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Líneas en Canvas JavaScript
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<meta name="viewport" content="width=device-width"> | |
<title>Líneas en Canvas</title> | |
</head> | |
<body> | |
<h1>Líneas en Canvas usando JavaScript</h1> | |
<a href="//parzibyte.me/blog">By Parzibyte</a> | |
<br> | |
<canvas id="canvas"></canvas> | |
<script src="script.js"></script> | |
</body> | |
</html> |
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/** | |
* Ejercicios con Canvas y JavaScript: líneas | |
* | |
* https://parzibyte.me/blog | |
*/ | |
const ALTURA_CANVAS = 200, | |
ANCHURA_CANVAS = 400; | |
// Obtener el elemento del DOM | |
const canvas = document.querySelector("#canvas"); | |
canvas.width = ANCHURA_CANVAS; | |
canvas.height = ALTURA_CANVAS; | |
// Del canvas, obtener el contexto para poder dibujar | |
const contexto = canvas.getContext("2d"); | |
// Comenzar | |
contexto.beginPath(); | |
// Grosor de línea | |
contexto.lineWidth = 3; | |
// Color de línea | |
contexto.strokeStyle = "blue"; | |
// Comenzamos en 0, 0 | |
contexto.moveTo(0, 0); | |
// Hacemos una línea hasta 48, 48 | |
contexto.lineTo(48, 48); | |
contexto.stroke(); // "Guardar" cambios | |
// Otra línea | |
contexto.beginPath(); | |
contexto.strokeStyle = "red"; | |
contexto.moveTo(100, 0); | |
contexto.lineTo(52, 48); | |
contexto.stroke(); | |
// Otra línea | |
contexto.beginPath(); | |
contexto.strokeStyle = "yellow"; | |
contexto.moveTo(0, 100); | |
contexto.lineTo(48, 52); | |
contexto.stroke(); | |
// Otra línea | |
contexto.beginPath(); | |
contexto.strokeStyle = "green"; | |
contexto.moveTo(100, 100); | |
contexto.lineTo(52, 52); | |
contexto.stroke(); |
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