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