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),
51 float GetProgress () const
56 const T& GetValue () const
62 float mProgress; ///< Progress this value applies to animation channel
63 T mValue; ///< value this animation channel should take
66 inline void Interpolate (Quaternion& result, const Quaternion& a, const Quaternion& b, float progress)
68 result = Quaternion::Slerp(a, b, progress);
71 inline void Interpolate (AngleAxis& result, const AngleAxis& a, const AngleAxis& b, float progress)
73 Quaternion q1(a.angle, a.axis);
74 Quaternion q2(b.angle, b.axis);
76 Quaternion iq = Quaternion::Slerp(q1, q2, progress);
77 iq.ToAxisAngle(result.axis, result.angle);
81 inline void Interpolate (bool& result, bool a, bool b, float progress)
83 result = progress < 0.5f ? a : b;
86 inline void Interpolate (int32_t& result, int a, int b, float progress)
88 result = static_cast<int>(static_cast<float>( a ) + static_cast<float>(b - a) * progress + 0.5f);
91 inline void Interpolate (float& result, float a, float b, float progress)
93 result = a + (b-a) * progress;
96 inline void Interpolate (Vector2& result, const Vector2& a, const Vector2& b, float progress)
98 result = a + (b-a) * progress;
101 inline void Interpolate (Vector3& result, const Vector3& a, const Vector3& b, float progress)
103 result = a + (b-a) * progress;
106 inline void Interpolate (Vector4& result, const Vector4& a, const Vector4& b, float progress)
108 result = a + (b-a) * progress;
111 /* Cubic Interpolation (Catmull-Rom spline) between values p1 and p2. p0 and p3 are prev and next values
112 * and are used as control points to calculate tangent of the curve at interpolation points.
114 * f(t) = a3*t^3 + a2*t^2 + a1*t + a0
115 * Restrictions: f(0)=p1 f(1)=p2 f'(0)=(p2-p0)*0.5 f'(1)=(p3-p1)*0.5
118 inline void CubicInterpolate( int32_t& result, int32_t p0, int32_t p1, int32_t p2, int32_t p3, float progress )
120 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;
121 float a2 = static_cast<float>( p0 ) - static_cast<float>( p1 ) * 2.5f + static_cast<float>( p2 ) * 2.0f - static_cast<float>( p3 ) * 0.5f;
122 float a1 = static_cast<float>( p2 - p0 ) * 0.5f;
124 result = static_cast<int>( a3*progress*progress*progress + a2*progress*progress + a1*progress + static_cast<float>( p1 ) + 0.5f );
127 inline void CubicInterpolate( float& result, float p0, float p1, float p2, float p3, float progress )
129 float a3 = p3*0.5f - p2*1.5f + p1*1.5f - p0*0.5f;
130 float a2 = p0 - p1*2.5f + p2*2.0f - p3*0.5f;
131 float a1 = (p2-p0)*0.5f;
133 result = a3*progress*progress*progress + a2*progress*progress + a1*progress + p1;
136 inline void CubicInterpolate( Vector2& result, const Vector2& p0, const Vector2& p1, const Vector2& p2, const Vector2& p3, float progress )
138 Vector2 a3 = p3*0.5f - p2*1.5f + p1*1.5f - p0*0.5f;
139 Vector2 a2 = p0 - p1*2.5f + p2*2.0f - p3*0.5f;
140 Vector2 a1 = (p2-p0)*0.5f;
142 result = a3*progress*progress*progress + a2*progress*progress + a1*progress + p1;
145 inline void CubicInterpolate( Vector3& result, const Vector3& p0, const Vector3& p1, const Vector3& p2, const Vector3& p3, float progress )
147 Vector3 a3 = p3*0.5f - p2*1.5f + p1*1.5f - p0*0.5f;
148 Vector3 a2 = p0 - p1*2.5f + p2*2.0f - p3*0.5f;
149 Vector3 a1 = (p2-p0)*0.5f;
151 result = a3*progress*progress*progress + a2*progress*progress + a1*progress + p1;
154 inline void CubicInterpolate( Vector4& result, const Vector4& p0, const Vector4& p1, const Vector4& p2, const Vector4& p3, float progress )
156 Vector4 a3 = p3*0.5f - p2*1.5f + p1*1.5f - p0*0.5f;
157 Vector4 a2 = p0 - p1*2.5f + p2*2.0f - p3*0.5f;
158 Vector4 a1 = (p2-p0)*0.5f;
160 result = a3*progress*progress*progress + a2*progress*progress + a1*progress + p1;
163 inline void CubicInterpolate( bool& result, bool p0, bool p1, bool p2, bool p3, float progress )
165 Interpolate( result, p1, p2, progress);
168 inline void CubicInterpolate( Quaternion& result, const Quaternion& p0, const Quaternion& p1, const Quaternion& p2, const Quaternion& p3, float progress )
170 Interpolate( result, p1, p2, progress);
173 inline void CubicInterpolate( AngleAxis& result, const AngleAxis& p0, const AngleAxis& p1, const AngleAxis& p2, const AngleAxis& p3, float progress )
175 Interpolate( result, p1, p2, progress);
178 } // namespace Internal
182 #endif // DALI_INTERNAL_PROGRESS_VALUE_H