MathHelpers.kt
/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.compose.ui.util
import kotlin.math.roundToInt
import kotlin.math.roundToLong
/**
* Linearly interpolate between [start] and [stop] with [fraction] fraction between them.
*/
fun lerp(start: Float, stop: Float, fraction: Float): Float {
return (1 - fraction) * start + fraction * stop
}
/**
* Linearly interpolate between [start] and [stop] with [fraction] fraction between them.
*/
fun lerp(start: Int, stop: Int, fraction: Float): Int {
return start + ((stop - start) * fraction.toDouble()).roundToInt()
}
/**
* Linearly interpolate between [start] and [stop] with [fraction] fraction between them.
*/
fun lerp(start: Long, stop: Long, fraction: Float): Long {
return start + ((stop - start) * fraction.toDouble()).roundToLong()
}