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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,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/XRBoundedReferenceSpace.h"
#include "mozilla/dom/XRRigidTransform.h"
#include "mozilla/dom/DOMPoint.h"
#include "VRDisplayClient.h"
namespace mozilla::dom {
XRBoundedReferenceSpace::XRBoundedReferenceSpace(nsIGlobalObject* aParent,
XRSession* aSession,
XRNativeOrigin* aNativeOrigin)
: XRReferenceSpace(aParent, aSession, aNativeOrigin,
XRReferenceSpaceType::Bounded_floor) {}
JSObject* XRBoundedReferenceSpace::WrapObject(
JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
return XRBoundedReferenceSpace_Binding::Wrap(aCx, this, aGivenProto);
}
void XRBoundedReferenceSpace::GetBoundsGeometry(
nsTArray<RefPtr<DOMPointReadOnly>>& result) {
const auto size =
mSession->GetDisplayClient()->GetDisplayInfo().GetStageSize();
if (size.width == 0 || size.height == 0) {
return;
}
// https://immersive-web.github.io/webxr/#dom-xrboundedreferencespace-boundsgeometry
// bounds geometry must be premultiplied by the inverse of the origin offset.
gfx::PointDouble3D offset = mNativeOrigin->GetPosition();
const auto addPoint = [&](const double x, const double z) {
RefPtr<DOMPointReadOnly> obj = new DOMPointReadOnly(
GetParentObject(), x - offset.x, 0.0f, z - offset.z, 1.0f);
result.EmplaceBack(obj);
};
addPoint(-size.width * 0.5f, size.height * 0.5f);
addPoint(size.width * 0.5f, size.height * 0.5f);
addPoint(size.width * 0.5f, -size.height * 0.5f);
addPoint(-size.width * 0.5f, -size.height * 0.5f);
// TODO (Bug 1611526): Support WebXR bounded reference spaces
}
already_AddRefed<XRReferenceSpace>
XRBoundedReferenceSpace::GetOffsetReferenceSpace(
const XRRigidTransform& aOriginOffset) {
RefPtr<XRBoundedReferenceSpace> offsetReferenceSpace =
new XRBoundedReferenceSpace(GetParentObject(), mSession, mNativeOrigin);
// https://immersive-web.github.io/webxr/#multiply-transforms
// An XRRigidTransform is essentially a rotation followed by a translation
gfx::QuaternionDouble otherOrientation = aOriginOffset.RawOrientation();
// The resulting rotation is the two combined
offsetReferenceSpace->mOriginOffsetOrientation =
mOriginOffsetOrientation * otherOrientation;
// We first apply the rotation of aOriginOffset to
// mOriginOffsetPosition offset, then translate by the offset of
// aOriginOffset
offsetReferenceSpace->mOriginOffsetPosition =
otherOrientation.RotatePoint(mOriginOffsetPosition) +
aOriginOffset.RawPosition();
return offsetReferenceSpace.forget();
}
} // namespace mozilla::dom
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