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// Copyright 2019 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.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_XR_XR_OBJECT_SPACE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_XR_XR_OBJECT_SPACE_H_
#include "third_party/blink/renderer/modules/xr/xr_space.h"
#include "third_party/blink/renderer/platform/transforms/transformation_matrix.h"
namespace blink {
class XRSession;
// Helper class that returns an XRSpace that tracks the position of object of
// type T (for example XRPlane, XRAnchor). The type T has to have a poseMatrix()
// method.
template <typename T>
class XRObjectSpace : public XRSpace {
public:
explicit XRObjectSpace(XRSession* session, const T* object)
: XRSpace(session), object_(object) {}
std::unique_ptr<TransformationMatrix> GetTransformToMojoSpace() override {
auto mojo_to_object = object_->poseMatrix();
if (!mojo_to_object.IsInvertible()) {
return nullptr;
}
return std::make_unique<TransformationMatrix>(mojo_to_object.Inverse());
}
void Trace(blink::Visitor* visitor) override {
visitor->Trace(object_);
XRSpace::Trace(visitor);
}
private:
Member<const T> object_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_XR_XR_OBJECT_SPACE_H_
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