module.exports = fromMat4 /** * Copies the upper-left 3x3 values into the given mat3. * * @alias mat3.fromMat4 * @param {mat3} out the receiving 3x3 matrix * @param {mat4} a the source 4x4 matrix * @returns {mat3} out */ function fromMat4(out, a) { out[0] = a[0] out[1] = a[1] out[2] = a[2] out[3] = a[4] out[4] = a[5] out[5] = a[6] out[6] = a[8] out[7] = a[9] out[8] = a[10] return out }