javascript
/
tentone.escher.js
mirror of https://github.com/tentone/escher.js.git


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166
							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>JSDoc: Source: objects/BezierCurve.js</title>

    <script src="scripts/prettify/prettify.js"> </script>
    <script src="scripts/prettify/lang-css.js"> </script>
    <!--[if lt IE 9]>
      <script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
    <![endif]-->
    <link type="text/css" rel="stylesheet" href="styles/prettify-tomorrow.css">
    <link type="text/css" rel="stylesheet" href="styles/jsdoc-default.css">
</head>

<body>

<div id="main">

    <h1 class="page-title">Source: objects/BezierCurve.js</h1>

    
    <section>
        <article>
            <pre class="prettyprint source linenums"><code>"use strict";

import {Object2D} from "../Object2D.js";
import {Vector2} from "../math/Vector2.js";
import {Circle} from "./Circle.js";
import {Line} from "./Line.js";

/**
 * BezierCurve object draw as bezier curve between two points.
 *
 * @class
 */
function BezierCurve()
{
	Object2D.call(this);

	/**
	 * Initial point of the curve.
	 *
	 * Can be equal to the position object of another object. (Making it automatically follow that object.)
	 */
	this.from = new Vector2();

	/**
	 * Intial position control point, indicates the tangent of the bezier curve on the first point.
	 */
	this.fromCp = new Vector2();

	/**
	 * Final point of the curve.
	 *
	 * Can be equal to the position object of another object. (Making it automatically follow that object.)
	 */
	this.to = new Vector2();

	/**
	 * Final position control point, indicates the tangent of the bezier curve on the last point.
	 */
	this.toCp = new Vector2();

	/**
	 * Dash line pattern to be used, if empty draws a solid line.
	 *
	 * Dash parttern is defined as the size of dashes as pairs of space with no line and with line.
	 *
	 * E.g if the daspattern is [1, 2] we get 1 point with line, 2 without line repeat infinitelly.
	 */
	this.dashPattern = [5, 5];

	/**
	 * Style of the object line.
	 */
	this.strokeStyle = "#000000";

	/**
	 * Line width of the line.
	 */
	this.lineWidth = 1;
}

BezierCurve.prototype = Object.create(Object2D.prototype);

/**
 * Create a bezier curve helper, to edit the bezier curve anchor points.
 *
 * @static
 */
BezierCurve.curveHelper = function(object)
{
	var fromCp = new Circle();
	fromCp.radius = 3;
	fromCp.layer = object.layer + 1;
	fromCp.draggable = true;
	fromCp.onPointerDrag = function(pointer, viewport, delta)
	{
		Object2D.prototype.onPointerDrag.call(this, pointer, viewport, delta);
		object.fromCp.copy(fromCp.position);
	};
	object.parent.add(fromCp);

	var fromLine = new Line();
	fromLine.from = object.from;
	fromLine.to = object.fromCp;
	object.parent.add(fromLine);

	var toCp = new Circle();
	toCp.radius = 3;
	toCp.layer = object.layer + 1;
	toCp.draggable = true;
	toCp.onPointerDrag = function(pointer, viewport, delta)
	{
		Object2D.prototype.onPointerDrag.call(this, pointer, viewport, delta);
		object.toCp.copy(toCp.position);
	};
	object.parent.add(toCp);

	var toLine = new Line();
	toLine.from = object.to;
	toLine.to = object.toCp;
	object.parent.add(toLine);
};

BezierCurve.prototype.draw = function(context, viewport, canvas)
{
	context.lineWidth = this.lineWidth;
	context.strokeStyle = this.strokeStyle;
	context.setLineDash(this.dashPattern);
	
	context.beginPath();
	context.moveTo(this.from.x, this.from.y);
	context.bezierCurveTo(this.fromCp.x, this.fromCp.y, this.toCp.x, this.toCp.y, this.to.x, this.to.y);
	context.stroke();
};

export {BezierCurve};
</code></pre>
        </article>
    </section>


</div>

<nav>
    <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="BezierCurve.html">BezierCurve</a></li><li><a href="Box.html">Box</a></li><li><a href="Box2.html">Box2</a></li><li><a href="BoxMask.html">BoxMask</a></li><li><a href="Circle.html">Circle</a></li><li><a href="DOM.html">DOM</a></li><li><a href="EventManager.html">EventManager</a></li><li><a href="Graph.html">Graph</a></li><li><a href="Helpers.html">Helpers</a></li><li><a href="Image.html">Image</a></li><li><a href="Key.html">Key</a></li><li><a href="Line.html">Line</a></li><li><a href="Mask.html">Mask</a></li><li><a href="Matrix.html">Matrix</a></li><li><a href="Object2D.html">Object2D</a></li><li><a href="Pattern.html">Pattern</a></li><li><a href="Pointer.html">Pointer</a></li><li><a href="Renderer.html">Renderer</a></li><li><a href="Text.html">Text</a></li><li><a href="UUID.html">UUID</a></li><li><a href="Vector2.html">Vector2</a></li><li><a href="Viewport.html">Viewport</a></li><li><a href="ViewportControls.html">ViewportControls</a></li></ul>
</nav>

<br class="clear">

<footer>
    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 3.6.2</a> on Tue Jun 25 2019 14:27:21 GMT+0100 (Western European Summer Time)
</footer>

<script> prettyPrint(); </script>
<script src="scripts/linenumber.js"> </script>
</body>
</html>