ShoesCard.kt

@ExperimentalAnimationApi
@Composable
fun ShoesCard(shoesArticle: ShoesArticle, onDeleted: () -> Unit) {
    /* ... */
    val screenWidth: Int
    with(LocalConfiguration.current) {
        screenWidth = this.screenWidthDp
    }
    /* ... */
    val explosionPercentage = remember { mutableStateOf(0f) }
    /* ... */
    funnelTranslation.value = (offsetX.value + funnelInitialTranslation).negateIfPositive {
        explosionPercentage.value = (offsetX.value + funnelInitialTranslation) / screenWidth
    }
    Box {
        /* ... */
        Canvas(modifier = Modifier
            .height(itemHeightDp)
            .offset {
                IntOffset(
                    (offsetX.value.roundToInt() - 2 * particleRadius.toInt()).coerceAtMost(
                        funnelWidth.toInt()
                    ), 0
                )
            })
        {
            /* ... */
            repeat(numberOfExplosionParticles / 2 + 1) {
                val hTranslation = (cos(angle).toFloat() * explosionRadius) * explosionPercentage.value
                val vTranslation = (sin(angle).toFloat() * explosionRadius) * explosionPercentage.value

                translate(hTranslation, vTranslation) {
                    drawCircle(
                        color = shoesArticle.color,
                        radius = explosionParticleRadius,
                        alpha = explosionPercentage.value / 2
                    )
                }
                if (angle != 0.0 && angle != Math.PI) {
                    translate(hTranslation, -vTranslation) {
                        drawCircle(
                            color = shoesArticle.color,
                            radius = explosionParticleRadius,
                            alpha = explosionPercentage.value / 2
                        )
                    }
                }
                angle += particleAngle
            }
        }
        /* ... */
    }
    /* ... */
}

/* ... */

private fun Float.negateIfPositive(onPositive: () -> Unit): Float {
    return if (this > 0) {
        onPositive()
        -this
    } else this
}