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* @license Apache-2.0
*
* Copyright (c) 2026 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MAIN //
/**
* Computes the cross product of two input strided arrays and assigns the results to an output strided array.
*
* @private
* @param {Object} x - first input array object
* @param {Collection} x.data - first input array data
* @param {Array<Function>} x.accessors - array element accessors
* @param {integer} strideX - stride length for `x`
* @param {NonNegativeInteger} offsetX - starting index for `x`
* @param {Object} y - second input array object
* @param {Collection} y.data - second input array data
* @param {Array<Function>} y.accessors - array element accessors
* @param {integer} strideY - stride length for `y`
* @param {NonNegativeInteger} offsetY - starting index for `y`
* @param {Object} z - output array object
* @param {Collection} z.data - output array data
* @param {Array<Function>} z.accessors - array element accessors
* @param {integer} strideZ - stride length for `z`
* @param {NonNegativeInteger} offsetZ - starting index for `z`
* @returns {Object} output array object
*
* @example
* var toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
* var arraylike2object = require( '@stdlib/array/base/arraylike2object' );
*
* var x = [ 1.0, 2.0, 3.0 ];
* var y = [ 4.0, 5.0, 6.0 ];
* var z = [ 0.0, 0.0, 0.0 ];
*
* gcross( arraylike2object( toAccessorArray( x ) ), 1, 0, arraylike2object( toAccessorArray( y ) ), 1, 0, arraylike2object( toAccessorArray( z ) ), 1, 0 );
* // z => [ -3.0, 6.0, -3.0 ]
*/
function gcross( x, strideX, offsetX, y, strideY, offsetY, z, strideZ, offsetZ ) {
var xbuf;
var ybuf;
var zbuf;
var xget;
var yget;
var zset;
var x0;
var x1;
var x2;
var y0;
var y1;
var y2;
// Cache references to array data:
xbuf = x.data;
ybuf = y.data;
zbuf = z.data;
// Cache references to element accessors:
xget = x.accessors[ 0 ];
yget = y.accessors[ 0 ];
zset = z.accessors[ 1 ];
x0 = xget( xbuf, offsetX );
x1 = xget( xbuf, offsetX+strideX );
x2 = xget( xbuf, offsetX+(2*strideX) );
y0 = yget( ybuf, offsetY );
y1 = yget( ybuf, offsetY+strideY );
y2 = yget( ybuf, offsetY+(2*strideY) );
zset( zbuf, offsetZ, (x1*y2) - (x2*y1) );
zset( zbuf, offsetZ+strideZ, (x2*y0) - (x0*y2) );
zset( zbuf, offsetZ+(2*strideZ), (x0*y1) - (x1*y0) );
return z;
}
// EXPORTS //
module.exports = gcross;
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