Refactor Vr activity into ChromeTabbedActivity.

chrome/browser/android/vr_shell/ui_elements.h

+// Copyright 2016 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 CHROME_BROWSER_ANDROID_VR_SHELL_UI_ELEMENTS_H_
+#define CHROME_BROWSER_ANDROID_VR_SHELL_UI_ELEMENTS_H_
+
+#include <cmath>
+#include <vector>
+
+#include "base/logging.h"
+#include "chrome/browser/android/vr_shell/vr_util.h"
+#include "third_party/gvr-android-sdk/src/ndk-beta/include/vr/gvr/capi/include/gvr_types.h"
+
+namespace vr_shell {
+
+enum XAnchoring {
+  XLEFT = 0,
+  XRIGHT,
+  XCENTER,
+  XNONE
+};
+
+enum YAnchoring {
+  YTOP,

[David Trainor- moved to gerrit, 2016/09/08 05:49:30]

= 0 for consistency?

[mthiesse, 2016/09/08 17:44:41]

Done.

+  YBOTTOM,
+  YCENTER,
+  YNONE
+};
+
+class ReversibleTransform {

[David Trainor- moved to gerrit, 2016/09/08 05:49:30]

Just want to make sure you've looked at the ui/gfx classes to see if we could
reuse any of those.  Maybe not since this seems to use the gvr:: subtypes, but
wanted to make sure.

[mthiesse, 2016/09/08 17:44:41]

Yes, we've looked at it. The main problem is that the row/column layout is
inverted so we would have to convert back and forth a *lot*.

We've talked to the GVR team about exposing a matrix math library as part of
libgvr.so (it seems all gvr users right now are just copy/pasting the necessary
math functions into their own code base), and they're willing to do so, but it's
not a high priority for them right now.

+ public:
+  ReversibleTransform();
+
+  void SetIdentity();
+  void Rotate(gvr::Quatf quat);
+  void Rotate(float ax, float ay, float az, float rad);
+  void Translate(float tx, float ty, float tz);
+  void Scale(float sx, float sy, float sz);
+
+  gvr::Mat4f mToWorld;

[David Trainor- moved to gerrit, 2016/09/08 05:49:30]

to_world_

[mthiesse, 2016/09/08 17:44:40]

Done.

+  gvr::Mat4f mFromWorld;

[David Trainor- moved to gerrit, 2016/09/08 05:49:30]

from_world_

[mthiesse, 2016/09/08 17:44:40]

Done.

+
+  // This object-to-world orientation quaternion is technically
+  // redundant, but it's easy to track it here for use as needed.
+  // TODO(klausw): use this instead of MatrixVectorRotation()?
+  // Would need quat * vector implementation.
+  gvr::Quatf mOrientation = {0.0f, 0.0f, 0.0f, 1.0f};
+};
+
+class WorldObject {
+ public:
+  // WorldObject* mParent = nullptr;

[David Trainor- moved to gerrit, 2016/09/08 05:49:30]

Remove?

[mthiesse, 2016/09/08 17:44:40]

Done.

+  ReversibleTransform mTransform;

[David Trainor- moved to gerrit, 2016/09/08 05:49:30]

transform_

[mthiesse, 2016/09/08 17:44:40]

Done.

+};
+
+class WorldRectangle : public WorldObject {
+ public:
+  gvr::Vec3f getCenter() const;
+  gvr::Vec3f getNormal() const;
+  float getRayDistance(gvr::Vec3f rayOrigin, gvr::Vec3f rayVector) const;
+};
+
+class ContentRectangle : public WorldRectangle {
+ public:
+  ContentRectangle();
+  ~ContentRectangle();
+
+  int id;

[David Trainor- moved to gerrit, 2016/09/08 05:49:30]

Fix member variable names to match above comments.  Maybe a few more comments on
some of the variables here.

[mthiesse, 2016/09/08 17:44:40]

Done.

+  // samplerExternalOES texture data for desktop content image.
+  int contentTextureHandle;
+  Rectf copyRect;
+  Recti windowRect;
+  gvr::Vec3f size;
+  gvr::Vec3f translation;
+  XAnchoring xAnchoring;
+  YAnchoring yAnchoring;
+  bool anchorZ;
+  std::vector<float> orientationAxisAngle;
+  std::vector<float> rotationAxisAngle;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ContentRectangle);
+};
+
+}  // namespace vr_shell
+
+#endif  // CHROME_BROWSER_ANDROID_VR_SHELL_UI_ELEMENTS_H_