1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
// Copyright 2016 The Chromium Authors
// 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_PLATFORM_TRANSFORMS_ROTATION_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_TRANSFORMS_ROTATION_H_
#include "third_party/blink/renderer/platform/platform_export.h"
#include "ui/gfx/geometry/vector3d_f.h"
namespace blink {
struct PLATFORM_EXPORT Rotation {
Rotation() : axis(0, 0, 0), angle(0) {}
Rotation(const gfx::Vector3dF& axis, double angle)
: axis(axis), angle(angle) {}
// If either rotation is effectively "zero" or both rotations share the same
// normalized axes this function returns true and the "non-zero" axis is
// returned as resultAxis and the effective angles are returned as
// resultAngleA and resultAngleB. Otherwise false is returned.
static bool GetCommonAxis(const Rotation& /*a*/,
const Rotation& /*b*/,
gfx::Vector3dF& result_axis,
double& result_angle_a,
double& result_angle_b);
// A progress of 0 corresponds to "from" and a progress of 1 corresponds to
// "to".
static Rotation Slerp(const Rotation& from,
const Rotation& to,
double progress);
// Returns a rotation whose effect is equivalent to applying a followed by b.
static Rotation Add(const Rotation& /*a*/, const Rotation& /*b*/);
// No restrictions on the axis vector.
gfx::Vector3dF axis;
// Measured in degrees.
double angle;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_TRANSFORMS_ROTATION_H_
|
