const { sin, cos } = require('../utils/trigonometry')
/**
* Creates a matrix from the given angle around the Y axis.
* This is equivalent to (but much faster than):
*
* mat4.identity(dest)
* mat4.rotateY(dest, dest, radians)
*
* @param {mat4} out - receiving matrix
* @param {Number} radians - angle to rotate the matrix by
* @returns {mat4} out
* @alias module:modeling/maths/mat4.fromYRotation
* @example
* let matrix = fromYRotation(create(), TAU / 4)
*/
const fromYRotation = (out, radians) => {
const s = sin(radians)
const c = cos(radians)
// Perform axis-specific matrix multiplication
out[0] = c
out[1] = 0
out[2] = -s
out[3] = 0
out[4] = 0
out[5] = 1
out[6] = 0
out[7] = 0
out[8] = s
out[9] = 0
out[10] = c
out[11] = 0
out[12] = 0
out[13] = 0
out[14] = 0
out[15] = 1
return out
}
module.exports = fromYRotation