654 lines
15 KiB
HTML
654 lines
15 KiB
HTML
|
<!DOCTYPE html>
|
||
|
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<meta charset="utf-8">
|
||
|
|
<title>JSDoc: Source: vec4.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: vec4.js</h1>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
<section>
|
||
|
|
<article>
|
||
|
|
<pre class="prettyprint source linenums"><code>import * as glMatrix from "./common.js";
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 4 Dimensional Vector
|
||
|
|
* @module vec4
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a new, empty vec4
|
||
|
|
*
|
||
|
|
* @returns {vec4} a new 4D vector
|
||
|
|
*/
|
||
|
|
export function create() {
|
||
|
|
let out = new glMatrix.ARRAY_TYPE(4);
|
||
|
|
if(glMatrix.ARRAY_TYPE != Float32Array) {
|
||
|
|
out[0] = 0;
|
||
|
|
out[1] = 0;
|
||
|
|
out[2] = 0;
|
||
|
|
out[3] = 0;
|
||
|
|
}
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a new vec4 initialized with values from an existing vector
|
||
|
|
*
|
||
|
|
* @param {vec4} a vector to clone
|
||
|
|
* @returns {vec4} a new 4D vector
|
||
|
|
*/
|
||
|
|
export function clone(a) {
|
||
|
|
let out = new glMatrix.ARRAY_TYPE(4);
|
||
|
|
out[0] = a[0];
|
||
|
|
out[1] = a[1];
|
||
|
|
out[2] = a[2];
|
||
|
|
out[3] = a[3];
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a new vec4 initialized with the given values
|
||
|
|
*
|
||
|
|
* @param {Number} x X component
|
||
|
|
* @param {Number} y Y component
|
||
|
|
* @param {Number} z Z component
|
||
|
|
* @param {Number} w W component
|
||
|
|
* @returns {vec4} a new 4D vector
|
||
|
|
*/
|
||
|
|
export function fromValues(x, y, z, w) {
|
||
|
|
let out = new glMatrix.ARRAY_TYPE(4);
|
||
|
|
out[0] = x;
|
||
|
|
out[1] = y;
|
||
|
|
out[2] = z;
|
||
|
|
out[3] = w;
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Copy the values from one vec4 to another
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a the source vector
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function copy(out, a) {
|
||
|
|
out[0] = a[0];
|
||
|
|
out[1] = a[1];
|
||
|
|
out[2] = a[2];
|
||
|
|
out[3] = a[3];
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the components of a vec4 to the given values
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {Number} x X component
|
||
|
|
* @param {Number} y Y component
|
||
|
|
* @param {Number} z Z component
|
||
|
|
* @param {Number} w W component
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function set(out, x, y, z, w) {
|
||
|
|
out[0] = x;
|
||
|
|
out[1] = y;
|
||
|
|
out[2] = z;
|
||
|
|
out[3] = w;
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds two vec4's
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a the first operand
|
||
|
|
* @param {vec4} b the second operand
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function add(out, a, b) {
|
||
|
|
out[0] = a[0] + b[0];
|
||
|
|
out[1] = a[1] + b[1];
|
||
|
|
out[2] = a[2] + b[2];
|
||
|
|
out[3] = a[3] + b[3];
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Subtracts vector b from vector a
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a the first operand
|
||
|
|
* @param {vec4} b the second operand
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function subtract(out, a, b) {
|
||
|
|
out[0] = a[0] - b[0];
|
||
|
|
out[1] = a[1] - b[1];
|
||
|
|
out[2] = a[2] - b[2];
|
||
|
|
out[3] = a[3] - b[3];
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Multiplies two vec4's
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a the first operand
|
||
|
|
* @param {vec4} b the second operand
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function multiply(out, a, b) {
|
||
|
|
out[0] = a[0] * b[0];
|
||
|
|
out[1] = a[1] * b[1];
|
||
|
|
out[2] = a[2] * b[2];
|
||
|
|
out[3] = a[3] * b[3];
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Divides two vec4's
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a the first operand
|
||
|
|
* @param {vec4} b the second operand
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function divide(out, a, b) {
|
||
|
|
out[0] = a[0] / b[0];
|
||
|
|
out[1] = a[1] / b[1];
|
||
|
|
out[2] = a[2] / b[2];
|
||
|
|
out[3] = a[3] / b[3];
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Math.ceil the components of a vec4
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a vector to ceil
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function ceil(out, a) {
|
||
|
|
out[0] = Math.ceil(a[0]);
|
||
|
|
out[1] = Math.ceil(a[1]);
|
||
|
|
out[2] = Math.ceil(a[2]);
|
||
|
|
out[3] = Math.ceil(a[3]);
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Math.floor the components of a vec4
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a vector to floor
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function floor(out, a) {
|
||
|
|
out[0] = Math.floor(a[0]);
|
||
|
|
out[1] = Math.floor(a[1]);
|
||
|
|
out[2] = Math.floor(a[2]);
|
||
|
|
out[3] = Math.floor(a[3]);
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the minimum of two vec4's
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a the first operand
|
||
|
|
* @param {vec4} b the second operand
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function min(out, a, b) {
|
||
|
|
out[0] = Math.min(a[0], b[0]);
|
||
|
|
out[1] = Math.min(a[1], b[1]);
|
||
|
|
out[2] = Math.min(a[2], b[2]);
|
||
|
|
out[3] = Math.min(a[3], b[3]);
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the maximum of two vec4's
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a the first operand
|
||
|
|
* @param {vec4} b the second operand
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function max(out, a, b) {
|
||
|
|
out[0] = Math.max(a[0], b[0]);
|
||
|
|
out[1] = Math.max(a[1], b[1]);
|
||
|
|
out[2] = Math.max(a[2], b[2]);
|
||
|
|
out[3] = Math.max(a[3], b[3]);
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Math.round the components of a vec4
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a vector to round
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function round(out, a) {
|
||
|
|
out[0] = Math.round(a[0]);
|
||
|
|
out[1] = Math.round(a[1]);
|
||
|
|
out[2] = Math.round(a[2]);
|
||
|
|
out[3] = Math.round(a[3]);
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Scales a vec4 by a scalar number
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a the vector to scale
|
||
|
|
* @param {Number} b amount to scale the vector by
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function scale(out, a, b) {
|
||
|
|
out[0] = a[0] * b;
|
||
|
|
out[1] = a[1] * b;
|
||
|
|
out[2] = a[2] * b;
|
||
|
|
out[3] = a[3] * b;
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds two vec4's after scaling the second operand by a scalar value
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a the first operand
|
||
|
|
* @param {vec4} b the second operand
|
||
|
|
* @param {Number} scale the amount to scale b by before adding
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function scaleAndAdd(out, a, b, scale) {
|
||
|
|
out[0] = a[0] + (b[0] * scale);
|
||
|
|
out[1] = a[1] + (b[1] * scale);
|
||
|
|
out[2] = a[2] + (b[2] * scale);
|
||
|
|
out[3] = a[3] + (b[3] * scale);
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Calculates the euclidian distance between two vec4's
|
||
|
|
*
|
||
|
|
* @param {vec4} a the first operand
|
||
|
|
* @param {vec4} b the second operand
|
||
|
|
* @returns {Number} distance between a and b
|
||
|
|
*/
|
||
|
|
export function distance(a, b) {
|
||
|
|
let x = b[0] - a[0];
|
||
|
|
let y = b[1] - a[1];
|
||
|
|
let z = b[2] - a[2];
|
||
|
|
let w = b[3] - a[3];
|
||
|
|
return Math.sqrt(x*x + y*y + z*z + w*w);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Calculates the squared euclidian distance between two vec4's
|
||
|
|
*
|
||
|
|
* @param {vec4} a the first operand
|
||
|
|
* @param {vec4} b the second operand
|
||
|
|
* @returns {Number} squared distance between a and b
|
||
|
|
*/
|
||
|
|
export function squaredDistance(a, b) {
|
||
|
|
let x = b[0] - a[0];
|
||
|
|
let y = b[1] - a[1];
|
||
|
|
let z = b[2] - a[2];
|
||
|
|
let w = b[3] - a[3];
|
||
|
|
return x*x + y*y + z*z + w*w;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Calculates the length of a vec4
|
||
|
|
*
|
||
|
|
* @param {vec4} a vector to calculate length of
|
||
|
|
* @returns {Number} length of a
|
||
|
|
*/
|
||
|
|
export function length(a) {
|
||
|
|
let x = a[0];
|
||
|
|
let y = a[1];
|
||
|
|
let z = a[2];
|
||
|
|
let w = a[3];
|
||
|
|
return Math.sqrt(x*x + y*y + z*z + w*w);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Calculates the squared length of a vec4
|
||
|
|
*
|
||
|
|
* @param {vec4} a vector to calculate squared length of
|
||
|
|
* @returns {Number} squared length of a
|
||
|
|
*/
|
||
|
|
export function squaredLength(a) {
|
||
|
|
let x = a[0];
|
||
|
|
let y = a[1];
|
||
|
|
let z = a[2];
|
||
|
|
let w = a[3];
|
||
|
|
return x*x + y*y + z*z + w*w;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Negates the components of a vec4
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a vector to negate
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function negate(out, a) {
|
||
|
|
out[0] = -a[0];
|
||
|
|
out[1] = -a[1];
|
||
|
|
out[2] = -a[2];
|
||
|
|
out[3] = -a[3];
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the inverse of the components of a vec4
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a vector to invert
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function inverse(out, a) {
|
||
|
|
out[0] = 1.0 / a[0];
|
||
|
|
out[1] = 1.0 / a[1];
|
||
|
|
out[2] = 1.0 / a[2];
|
||
|
|
out[3] = 1.0 / a[3];
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Normalize a vec4
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a vector to normalize
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function normalize(out, a) {
|
||
|
|
let x = a[0];
|
||
|
|
let y = a[1];
|
||
|
|
let z = a[2];
|
||
|
|
let w = a[3];
|
||
|
|
let len = x*x + y*y + z*z + w*w;
|
||
|
|
if (len > 0) {
|
||
|
|
len = 1 / Math.sqrt(len);
|
||
|
|
out[0] = x * len;
|
||
|
|
out[1] = y * len;
|
||
|
|
out[2] = z * len;
|
||
|
|
out[3] = w * len;
|
||
|
|
}
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Calculates the dot product of two vec4's
|
||
|
|
*
|
||
|
|
* @param {vec4} a the first operand
|
||
|
|
* @param {vec4} b the second operand
|
||
|
|
* @returns {Number} dot product of a and b
|
||
|
|
*/
|
||
|
|
export function dot(a, b) {
|
||
|
|
return a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + a[3] * b[3];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Performs a linear interpolation between two vec4's
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a the first operand
|
||
|
|
* @param {vec4} b the second operand
|
||
|
|
* @param {Number} t interpolation amount, in the range [0-1], between the two inputs
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function lerp(out, a, b, t) {
|
||
|
|
let ax = a[0];
|
||
|
|
let ay = a[1];
|
||
|
|
let az = a[2];
|
||
|
|
let aw = a[3];
|
||
|
|
out[0] = ax + t * (b[0] - ax);
|
||
|
|
out[1] = ay + t * (b[1] - ay);
|
||
|
|
out[2] = az + t * (b[2] - az);
|
||
|
|
out[3] = aw + t * (b[3] - aw);
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Generates a random vector with the given scale
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {Number} [scale] Length of the resulting vector. If ommitted, a unit vector will be returned
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function random(out, scale) {
|
||
|
|
scale = scale || 1.0;
|
||
|
|
|
||
|
|
// Marsaglia, George. Choosing a Point from the Surface of a
|
||
|
|
// Sphere. Ann. Math. Statist. 43 (1972), no. 2, 645--646.
|
||
|
|
// http://projecteuclid.org/euclid.aoms/1177692644;
|
||
|
|
var v1, v2, v3, v4;
|
||
|
|
var s1, s2;
|
||
|
|
do {
|
||
|
|
v1 = glMatrix.RANDOM() * 2 - 1;
|
||
|
|
v2 = glMatrix.RANDOM() * 2 - 1;
|
||
|
|
s1 = v1 * v1 + v2 * v2;
|
||
|
|
} while (s1 >= 1);
|
||
|
|
do {
|
||
|
|
v3 = glMatrix.RANDOM() * 2 - 1;
|
||
|
|
v4 = glMatrix.RANDOM() * 2 - 1;
|
||
|
|
s2 = v3 * v3 + v4 * v4;
|
||
|
|
} while (s2 >= 1);
|
||
|
|
|
||
|
|
var d = Math.sqrt((1 - s1) / s2);
|
||
|
|
out[0] = scale * v1;
|
||
|
|
out[1] = scale * v2;
|
||
|
|
out[2] = scale * v3 * d;
|
||
|
|
out[3] = scale * v4 * d;
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Transforms the vec4 with a mat4.
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a the vector to transform
|
||
|
|
* @param {mat4} m matrix to transform with
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function transformMat4(out, a, m) {
|
||
|
|
let x = a[0], y = a[1], z = a[2], w = a[3];
|
||
|
|
out[0] = m[0] * x + m[4] * y + m[8] * z + m[12] * w;
|
||
|
|
out[1] = m[1] * x + m[5] * y + m[9] * z + m[13] * w;
|
||
|
|
out[2] = m[2] * x + m[6] * y + m[10] * z + m[14] * w;
|
||
|
|
out[3] = m[3] * x + m[7] * y + m[11] * z + m[15] * w;
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Transforms the vec4 with a quat
|
||
|
|
*
|
||
|
|
* @param {vec4} out the receiving vector
|
||
|
|
* @param {vec4} a the vector to transform
|
||
|
|
* @param {quat} q quaternion to transform with
|
||
|
|
* @returns {vec4} out
|
||
|
|
*/
|
||
|
|
export function transformQuat(out, a, q) {
|
||
|
|
let x = a[0], y = a[1], z = a[2];
|
||
|
|
let qx = q[0], qy = q[1], qz = q[2], qw = q[3];
|
||
|
|
|
||
|
|
// calculate quat * vec
|
||
|
|
let ix = qw * x + qy * z - qz * y;
|
||
|
|
let iy = qw * y + qz * x - qx * z;
|
||
|
|
let iz = qw * z + qx * y - qy * x;
|
||
|
|
let iw = -qx * x - qy * y - qz * z;
|
||
|
|
|
||
|
|
// calculate result * inverse quat
|
||
|
|
out[0] = ix * qw + iw * -qx + iy * -qz - iz * -qy;
|
||
|
|
out[1] = iy * qw + iw * -qy + iz * -qx - ix * -qz;
|
||
|
|
out[2] = iz * qw + iw * -qz + ix * -qy - iy * -qx;
|
||
|
|
out[3] = a[3];
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a string representation of a vector
|
||
|
|
*
|
||
|
|
* @param {vec4} a vector to represent as a string
|
||
|
|
* @returns {String} string representation of the vector
|
||
|
|
*/
|
||
|
|
export function str(a) {
|
||
|
|
return 'vec4(' + a[0] + ', ' + a[1] + ', ' + a[2] + ', ' + a[3] + ')';
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns whether or not the vectors have exactly the same elements in the same position (when compared with ===)
|
||
|
|
*
|
||
|
|
* @param {vec4} a The first vector.
|
||
|
|
* @param {vec4} b The second vector.
|
||
|
|
* @returns {Boolean} True if the vectors are equal, false otherwise.
|
||
|
|
*/
|
||
|
|
export function exactEquals(a, b) {
|
||
|
|
return a[0] === b[0] && a[1] === b[1] && a[2] === b[2] && a[3] === b[3];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns whether or not the vectors have approximately the same elements in the same position.
|
||
|
|
*
|
||
|
|
* @param {vec4} a The first vector.
|
||
|
|
* @param {vec4} b The second vector.
|
||
|
|
* @returns {Boolean} True if the vectors are equal, false otherwise.
|
||
|
|
*/
|
||
|
|
export function equals(a, b) {
|
||
|
|
let a0 = a[0], a1 = a[1], a2 = a[2], a3 = a[3];
|
||
|
|
let b0 = b[0], b1 = b[1], b2 = b[2], b3 = b[3];
|
||
|
|
return (Math.abs(a0 - b0) <= glMatrix.EPSILON*Math.max(1.0, Math.abs(a0), Math.abs(b0)) &&
|
||
|
|
Math.abs(a1 - b1) <= glMatrix.EPSILON*Math.max(1.0, Math.abs(a1), Math.abs(b1)) &&
|
||
|
|
Math.abs(a2 - b2) <= glMatrix.EPSILON*Math.max(1.0, Math.abs(a2), Math.abs(b2)) &&
|
||
|
|
Math.abs(a3 - b3) <= glMatrix.EPSILON*Math.max(1.0, Math.abs(a3), Math.abs(b3)));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Alias for {@link vec4.subtract}
|
||
|
|
* @function
|
||
|
|
*/
|
||
|
|
export const sub = subtract;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Alias for {@link vec4.multiply}
|
||
|
|
* @function
|
||
|
|
*/
|
||
|
|
export const mul = multiply;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Alias for {@link vec4.divide}
|
||
|
|
* @function
|
||
|
|
*/
|
||
|
|
export const div = divide;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Alias for {@link vec4.distance}
|
||
|
|
* @function
|
||
|
|
*/
|
||
|
|
export const dist = distance;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Alias for {@link vec4.squaredDistance}
|
||
|
|
* @function
|
||
|
|
*/
|
||
|
|
export const sqrDist = squaredDistance;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Alias for {@link vec4.length}
|
||
|
|
* @function
|
||
|
|
*/
|
||
|
|
export const len = length;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Alias for {@link vec4.squaredLength}
|
||
|
|
* @function
|
||
|
|
*/
|
||
|
|
export const sqrLen = squaredLength;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Perform some operation over an array of vec4s.
|
||
|
|
*
|
||
|
|
* @param {Array} a the array of vectors to iterate over
|
||
|
|
* @param {Number} stride Number of elements between the start of each vec4. If 0 assumes tightly packed
|
||
|
|
* @param {Number} offset Number of elements to skip at the beginning of the array
|
||
|
|
* @param {Number} count Number of vec4s to iterate over. If 0 iterates over entire array
|
||
|
|
* @param {Function} fn Function to call for each vector in the array
|
||
|
|
* @param {Object} [arg] additional argument to pass to fn
|
||
|
|
* @returns {Array} a
|
||
|
|
* @function
|
||
|
|
*/
|
||
|
|
export const forEach = (function() {
|
||
|
|
let vec = create();
|
||
|
|
|
||
|
|
return function(a, stride, offset, count, fn, arg) {
|
||
|
|
let i, l;
|
||
|
|
if(!stride) {
|
||
|
|
stride = 4;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(!offset) {
|
||
|
|
offset = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(count) {
|
||
|
|
l = Math.min((count * stride) + offset, a.length);
|
||
|
|
} else {
|
||
|
|
l = a.length;
|
||
|
|
}
|
||
|
|
|
||
|
|
for(i = offset; i < l; i += stride) {
|
||
|
|
vec[0] = a[i]; vec[1] = a[i+1]; vec[2] = a[i+2]; vec[3] = a[i+3];
|
||
|
|
fn(vec, vec, arg);
|
||
|
|
a[i] = vec[0]; a[i+1] = vec[1]; a[i+2] = vec[2]; a[i+3] = vec[3];
|
||
|
|
}
|
||
|
|
|
||
|
|
return a;
|
||
|
|
};
|
||
|
|
})();
|
||
|
|
</code></pre>
|
||
|
|
</article>
|
||
|
|
</section>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<nav>
|
||
|
|
<h2><a href="index.html">Home</a></h2><h3>Modules</h3><ul><li><a href="module-glMatrix.html">glMatrix</a></li><li><a href="module-mat2.html">mat2</a></li><li><a href="module-mat2d.html">mat2d</a></li><li><a href="module-mat3.html">mat3</a></li><li><a href="module-mat4.html">mat4</a></li><li><a href="module-quat.html">quat</a></li><li><a href="module-quat2.html">quat2</a></li><li><a href="module-vec2.html">vec2</a></li><li><a href="module-vec3.html">vec3</a></li><li><a href="module-vec4.html">vec4</a></li></ul>
|
||
|
|
</nav>
|
||
|
|
|
||
|
|
<br class="clear">
|
||
|
|
|
||
|
|
<footer>
|
||
|
|
Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Fri Jul 13 2018 11:51:33 GMT+0200 (W. Europe Daylight Time)
|
||
|
|
</footer>
|
||
|
|
|
||
|
|
<script> prettyPrint(); </script>
|
||
|
|
<script src="scripts/linenumber.js"> </script>
|
||
|
|
</body>
|
||
|
|
</html>
|