зеркало из https://github.com/mozilla/gecko-dev.git
84 строки
3.0 KiB
C++
84 строки
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/XRSpace.h"
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#include "mozilla/dom/XRRigidTransform.h"
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#include "VRDisplayClient.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_CLASS(XRSpace)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(XRSpace, DOMEventTargetHelper)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSession)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(XRSpace, DOMEventTargetHelper)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mSession)
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// Don't need NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER because
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// DOMEventTargetHelper does it for us.
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(XRSpace, DOMEventTargetHelper)
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XRSpace::XRSpace(nsIGlobalObject* aParent, XRSession* aSession,
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XRNativeOrigin* aNativeOrigin)
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: DOMEventTargetHelper(aParent),
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mSession(aSession),
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mNativeOrigin(aNativeOrigin),
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mOriginOffsetPosition(0.0f, 0.0f, 0.0f),
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mOriginOffsetOrientation(0.0f, 0.0f, 0.0f, 1.0f) {}
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JSObject* XRSpace::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return XRSpace_Binding::Wrap(aCx, this, aGivenProto);
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}
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XRSession* XRSpace::GetSession() const { return mSession; }
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gfx::QuaternionDouble XRSpace::GetEffectiveOriginOrientation() const {
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gfx::QuaternionDouble orientation =
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mNativeOrigin->GetOrientation() * mOriginOffsetOrientation;
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return orientation;
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}
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gfx::PointDouble3D XRSpace::GetEffectiveOriginPosition() const {
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gfx::PointDouble3D position;
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position = mNativeOrigin->GetPosition();
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position = mOriginOffsetOrientation.RotatePoint(position);
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position += mOriginOffsetPosition;
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return position;
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}
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gfx::Matrix4x4Double XRSpace::GetEffectiveOriginTransform() const {
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gfx::Matrix4x4Double transform;
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transform.SetRotationFromQuaternion(GetEffectiveOriginOrientation());
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transform.PostTranslate(GetEffectiveOriginPosition());
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return transform;
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}
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bool XRSpace::IsPositionEmulated() const {
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gfx::VRDisplayClient* display = mSession->GetDisplayClient();
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if (!display) {
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// When there are no sensors, the position is considered emulated.
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return true;
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}
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const gfx::VRDisplayInfo& displayInfo = display->GetDisplayInfo();
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if (displayInfo.GetCapabilities() &
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gfx::VRDisplayCapabilityFlags::Cap_PositionEmulated) {
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// Cap_PositionEmulated indicates that the position is always emulated.
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return true;
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}
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const gfx::VRHMDSensorState& sensorState = display->GetSensorState();
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// When positional tracking is lost, the position is considered emulated.
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return ((sensorState.flags & gfx::VRDisplayCapabilityFlags::Cap_Position) ==
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gfx::VRDisplayCapabilityFlags::Cap_None);
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}
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} // namespace dom
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} // namespace mozilla
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