1 #ifndef DALI_INTERNAL_PROGRESS_VALUE_H
2 #define DALI_INTERNAL_PROGRESS_VALUE_H
5 * Copyright (c) 2019 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
22 #include <dali/public-api/math/angle-axis.h>
23 #include <dali/public-api/math/quaternion.h>
24 #include <dali/public-api/math/vector2.h>
25 #include <dali/public-api/math/vector3.h>
26 #include <dali/public-api/math/vector4.h>
35 * Progress / value pair for animating channels (properties) with keyframes
41 ProgressValue (float progress, T value)
42 : mProgress(progress),
47 ~ProgressValue() = default;
49 float GetProgress () const
54 const T& GetValue () const
60 float mProgress; ///< Progress this value applies to animation channel
61 T mValue; ///< value this animation channel should take
64 inline void Interpolate (Quaternion& result, const Quaternion& a, const Quaternion& b, float progress)
66 result = Quaternion::Slerp(a, b, progress);
69 inline void Interpolate (AngleAxis& result, const AngleAxis& a, const AngleAxis& b, float progress)
71 Quaternion q1(a.angle, a.axis);
72 Quaternion q2(b.angle, b.axis);
74 Quaternion iq = Quaternion::Slerp(q1, q2, progress);
75 iq.ToAxisAngle(result.axis, result.angle);
79 inline void Interpolate (bool& result, bool a, bool b, float progress)
81 result = progress < 0.5f ? a : b;
84 inline void Interpolate (int32_t& result, int a, int b, float progress)
86 result = static_cast<int>(static_cast<float>( a ) + static_cast<float>(b - a) * progress + 0.5f);
89 inline void Interpolate (float& result, float a, float b, float progress)
91 result = a + (b-a) * progress;
94 inline void Interpolate (Vector2& result, const Vector2& a, const Vector2& b, float progress)
96 result = a + (b-a) * progress;
99 inline void Interpolate (Vector3& result, const Vector3& a, const Vector3& b, float progress)
101 result = a + (b-a) * progress;
104 inline void Interpolate (Vector4& result, const Vector4& a, const Vector4& b, float progress)
106 result = a + (b-a) * progress;
109 /* Cubic Interpolation (Catmull-Rom spline) between values p1 and p2. p0 and p3 are prev and next values
110 * and are used as control points to calculate tangent of the curve at interpolation points.
112 * f(t) = a3*t^3 + a2*t^2 + a1*t + a0
113 * Restrictions: f(0)=p1 f(1)=p2 f'(0)=(p2-p0)*0.5 f'(1)=(p3-p1)*0.5
116 inline void CubicInterpolate( int32_t& result, int32_t p0, int32_t p1, int32_t p2, int32_t p3, float progress )
118 float a3 = static_cast<float>( p3 ) * 0.5f - static_cast<float>( p2 ) * 1.5f + static_cast<float>( p1 ) * 1.5f - static_cast<float>( p0 ) * 0.5f;
119 float a2 = static_cast<float>( p0 ) - static_cast<float>( p1 ) * 2.5f + static_cast<float>( p2 ) * 2.0f - static_cast<float>( p3 ) * 0.5f;
120 float a1 = static_cast<float>( p2 - p0 ) * 0.5f;
122 result = static_cast<int>( a3*progress*progress*progress + a2*progress*progress + a1*progress + static_cast<float>( p1 ) + 0.5f );
125 inline void CubicInterpolate( float& result, float p0, float p1, float p2, float p3, float progress )
127 float a3 = p3*0.5f - p2*1.5f + p1*1.5f - p0*0.5f;
128 float a2 = p0 - p1*2.5f + p2*2.0f - p3*0.5f;
129 float a1 = (p2-p0)*0.5f;
131 result = a3*progress*progress*progress + a2*progress*progress + a1*progress + p1;
134 inline void CubicInterpolate( Vector2& result, const Vector2& p0, const Vector2& p1, const Vector2& p2, const Vector2& p3, float progress )
136 Vector2 a3 = p3*0.5f - p2*1.5f + p1*1.5f - p0*0.5f;
137 Vector2 a2 = p0 - p1*2.5f + p2*2.0f - p3*0.5f;
138 Vector2 a1 = (p2-p0)*0.5f;
140 result = a3*progress*progress*progress + a2*progress*progress + a1*progress + p1;
143 inline void CubicInterpolate( Vector3& result, const Vector3& p0, const Vector3& p1, const Vector3& p2, const Vector3& p3, float progress )
145 Vector3 a3 = p3*0.5f - p2*1.5f + p1*1.5f - p0*0.5f;
146 Vector3 a2 = p0 - p1*2.5f + p2*2.0f - p3*0.5f;
147 Vector3 a1 = (p2-p0)*0.5f;
149 result = a3*progress*progress*progress + a2*progress*progress + a1*progress + p1;
152 inline void CubicInterpolate( Vector4& result, const Vector4& p0, const Vector4& p1, const Vector4& p2, const Vector4& p3, float progress )
154 Vector4 a3 = p3*0.5f - p2*1.5f + p1*1.5f - p0*0.5f;
155 Vector4 a2 = p0 - p1*2.5f + p2*2.0f - p3*0.5f;
156 Vector4 a1 = (p2-p0)*0.5f;
158 result = a3*progress*progress*progress + a2*progress*progress + a1*progress + p1;
161 inline void CubicInterpolate( bool& result, bool p0, bool p1, bool p2, bool p3, float progress )
163 Interpolate( result, p1, p2, progress);
166 inline void CubicInterpolate( Quaternion& result, const Quaternion& p0, const Quaternion& p1, const Quaternion& p2, const Quaternion& p3, float progress )
168 Interpolate( result, p1, p2, progress);
171 inline void CubicInterpolate( AngleAxis& result, const AngleAxis& p0, const AngleAxis& p1, const AngleAxis& p2, const AngleAxis& p3, float progress )
173 Interpolate( result, p1, p2, progress);
176 } // namespace Internal
180 #endif // DALI_INTERNAL_PROGRESS_VALUE_H