| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "third_party/blink/renderer/modules/xr/xr_utils.h" |
| |
| #include <cmath> |
| |
| namespace blink { |
| |
| DOMFloat32Array* transformationMatrixToDOMFloat32Array( |
| const TransformationMatrix& matrix) { |
| float array[] = { |
| static_cast<float>(matrix.M11()), static_cast<float>(matrix.M12()), |
| static_cast<float>(matrix.M13()), static_cast<float>(matrix.M14()), |
| static_cast<float>(matrix.M21()), static_cast<float>(matrix.M22()), |
| static_cast<float>(matrix.M23()), static_cast<float>(matrix.M24()), |
| static_cast<float>(matrix.M31()), static_cast<float>(matrix.M32()), |
| static_cast<float>(matrix.M33()), static_cast<float>(matrix.M34()), |
| static_cast<float>(matrix.M41()), static_cast<float>(matrix.M42()), |
| static_cast<float>(matrix.M43()), static_cast<float>(matrix.M44())}; |
| |
| return DOMFloat32Array::Create(array, 16); |
| } |
| |
| // Normalize to have length = 1.0 |
| DOMPointReadOnly* makeNormalizedQuaternion(double x, |
| double y, |
| double z, |
| double w) { |
| double length = std::sqrt((x * x) + (y * y) + (z * z) + (w * w)); |
| if (length == 0.0) { |
| // Return a default value instead of crashing. |
| return DOMPointReadOnly::Create(0.0, 0.0, 0.0, 1.0); |
| } |
| return DOMPointReadOnly::Create(x / length, y / length, z / length, |
| w / length); |
| } |
| |
| } // namespace blink |
