1 /* 2 * Copyright (C) 2024 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.mechanics.testing 18 19 import com.android.mechanics.spring.SpringParameters 20 21 object DefaultSprings { 22 val matStandardDefault = 23 SpringParameters( 24 stiffness = StandardMotionTokens.SpringDefaultSpatialStiffness, 25 dampingRatio = StandardMotionTokens.SpringDefaultSpatialDamping, 26 ) 27 val matStandardFast = 28 SpringParameters( 29 stiffness = StandardMotionTokens.SpringFastSpatialStiffness, 30 dampingRatio = StandardMotionTokens.SpringFastSpatialDamping, 31 ) 32 val matExpressiveDefault = 33 SpringParameters( 34 stiffness = ExpressiveMotionTokens.SpringDefaultSpatialStiffness, 35 dampingRatio = ExpressiveMotionTokens.SpringDefaultSpatialDamping, 36 ) 37 val matExpressiveFast = 38 SpringParameters( 39 stiffness = ExpressiveMotionTokens.SpringFastSpatialStiffness, 40 dampingRatio = ExpressiveMotionTokens.SpringFastSpatialDamping, 41 ) 42 43 internal object StandardMotionTokens { 44 val SpringDefaultSpatialDamping = 0.9f 45 val SpringDefaultSpatialStiffness = 700.0f 46 val SpringDefaultEffectsDamping = 1.0f 47 val SpringDefaultEffectsStiffness = 1600.0f 48 val SpringFastSpatialDamping = 0.9f 49 val SpringFastSpatialStiffness = 1400.0f 50 val SpringFastEffectsDamping = 1.0f 51 val SpringFastEffectsStiffness = 3800.0f 52 val SpringSlowSpatialDamping = 0.9f 53 val SpringSlowSpatialStiffness = 300.0f 54 val SpringSlowEffectsDamping = 1.0f 55 val SpringSlowEffectsStiffness = 800.0f 56 } 57 58 internal object ExpressiveMotionTokens { 59 val SpringDefaultSpatialDamping = 0.8f 60 val SpringDefaultSpatialStiffness = 380.0f 61 val SpringDefaultEffectsDamping = 1.0f 62 val SpringDefaultEffectsStiffness = 1600.0f 63 val SpringFastSpatialDamping = 0.6f 64 val SpringFastSpatialStiffness = 800.0f 65 val SpringFastEffectsDamping = 1.0f 66 val SpringFastEffectsStiffness = 3800.0f 67 val SpringSlowSpatialDamping = 0.8f 68 val SpringSlowSpatialStiffness = 200.0f 69 val SpringSlowEffectsDamping = 1.0f 70 val SpringSlowEffectsStiffness = 800.0f 71 } 72 } 73