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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "ui/gfx/interpolated_transform.h" | 5 #include "ui/gfx/interpolated_transform.h" |
| 6 | 6 |
| 7 #include <cmath> | 7 #include <cmath> |
| 8 | 8 |
| 9 #ifndef M_PI | 9 #ifndef M_PI |
| 10 #define M_PI 3.14159265358979323846 | 10 #define M_PI 3.14159265358979323846 |
| 11 #endif | 11 #endif |
| 12 | 12 |
| 13 #include "base/logging.h" | 13 #include "base/logging.h" |
| 14 #include "ui/base/animation/tween.h" | 14 #include "ui/gfx/animation/tween.h" |
| 15 | 15 |
| 16 namespace { | 16 namespace { |
| 17 | 17 |
| 18 static const double EPSILON = 1e-6; | 18 static const double EPSILON = 1e-6; |
| 19 | 19 |
| 20 bool IsMultipleOfNinetyDegrees(double degrees) { | 20 bool IsMultipleOfNinetyDegrees(double degrees) { |
| 21 double remainder = fabs(fmod(degrees, 90.0)); | 21 double remainder = fabs(fmod(degrees, 90.0)); |
| 22 return remainder < EPSILON || 90.0 - remainder < EPSILON; | 22 return remainder < EPSILON || 90.0 - remainder < EPSILON; |
| 23 } | 23 } |
| 24 | 24 |
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| 118 // due to one of the following if statements. | 118 // due to one of the following if statements. |
| 119 DCHECK(end_time_ >= start_time_); | 119 DCHECK(end_time_ >= start_time_); |
| 120 | 120 |
| 121 if (time < start_time_) | 121 if (time < start_time_) |
| 122 return start_value; | 122 return start_value; |
| 123 | 123 |
| 124 if (time >= end_time_) | 124 if (time >= end_time_) |
| 125 return end_value; | 125 return end_value; |
| 126 | 126 |
| 127 float t = (time - start_time_) / (end_time_ - start_time_); | 127 float t = (time - start_time_) / (end_time_ - start_time_); |
| 128 return static_cast<float>(Tween::ValueBetween(t, start_value, end_value)); | 128 return static_cast<float>( |
| 129 gfx::Tween::ValueBetween(t, start_value, end_value)); |
| 129 } | 130 } |
| 130 | 131 |
| 131 /////////////////////////////////////////////////////////////////////////////// | 132 /////////////////////////////////////////////////////////////////////////////// |
| 132 // InterpolatedRotation | 133 // InterpolatedRotation |
| 133 // | 134 // |
| 134 | 135 |
| 135 InterpolatedRotation::InterpolatedRotation(float start_degrees, | 136 InterpolatedRotation::InterpolatedRotation(float start_degrees, |
| 136 float end_degrees) | 137 float end_degrees) |
| 137 : InterpolatedTransform(), | 138 : InterpolatedTransform(), |
| 138 start_degrees_(start_degrees), | 139 start_degrees_(start_degrees), |
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| 364 | 365 |
| 365 void InterpolatedMatrixTransform::Init(const gfx::Transform& start_transform, | 366 void InterpolatedMatrixTransform::Init(const gfx::Transform& start_transform, |
| 366 const gfx::Transform& end_transform) { | 367 const gfx::Transform& end_transform) { |
| 367 bool success = gfx::DecomposeTransform(&start_decomp_, start_transform); | 368 bool success = gfx::DecomposeTransform(&start_decomp_, start_transform); |
| 368 DCHECK(success); | 369 DCHECK(success); |
| 369 success = gfx::DecomposeTransform(&end_decomp_, end_transform); | 370 success = gfx::DecomposeTransform(&end_decomp_, end_transform); |
| 370 DCHECK(success); | 371 DCHECK(success); |
| 371 } | 372 } |
| 372 | 373 |
| 373 } // namespace ui | 374 } // namespace ui |
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