[WIP] start 1.15 port

reorganize packages to match Fabric version
use util classes from Fabric version

src/main/kotlin/mods/betterfoliage/util/Misc.kt

@@ -0,0 +1,75 @@
+@file:Suppress("NOTHING_TO_INLINE")
+package mods.betterfoliage.util
+
+import net.minecraft.util.ResourceLocation
+import net.minecraft.util.math.BlockPos
+import net.minecraft.world.World
+import org.apache.logging.log4j.Level
+import org.apache.logging.log4j.Logger
+import java.lang.Math.*
+import kotlin.reflect.KProperty
+
+const val PI2 = 2.0 * PI
+
+/** Strip the given prefix off the start of the string, if present */
+inline fun String.stripStart(str: String, ignoreCase: Boolean = true) = if (startsWith(str, ignoreCase)) substring(str.length) else this
+inline fun String.stripEnd(str: String, ignoreCase: Boolean = true) = if (endsWith(str, ignoreCase)) substring(0, length - str.length) else this
+
+/** Strip the given prefix off the start of the resource path, if present */
+inline fun ResourceLocation.stripStart(str: String) = ResourceLocation(namespace, path.stripStart(str))
+inline fun ResourceLocation.stripEnd(str: String) = ResourceLocation(namespace, path.stripEnd(str))
+
+/**
+ * Property-level delegate backed by a [ThreadLocal].
+ *
+ * @param[init] Lambda to get initial value
+ */
+class ThreadLocalDelegate<T>(init: () -> T) {
+    var tlVal = ThreadLocal.withInitial(init)
+    operator fun getValue(thisRef: Any?, property: KProperty<*>): T = tlVal.get()
+    operator fun setValue(thisRef: Any?, property: KProperty<*>, value: T) { tlVal.set(value) }
+}
+
+/** Call the supplied lambda and return its result, or the given default value if an exception is thrown. */
+fun <T> tryDefault(default: T, work: ()->T) = try { work() } catch (e: Throwable) { default }
+
+/**
+ * Return this [Double] value if it lies between the two limits. If outside, return the
+ * minimum/maximum value correspondingly.
+ */
+fun Double.minmax(minVal: Double, maxVal: Double) = min(max(this, minVal), maxVal)
+
+/**
+ * Return this [Int] value if it lies between the two limits. If outside, return the
+ * minimum/maximum value correspondingly.
+ */
+fun Int.minmax(minVal: Int, maxVal: Int) = min(max(this, minVal), maxVal)
+
+fun nextPowerOf2(x: Int): Int {
+    return 1 shl (if (x == 0) 0 else 32 - Integer.numberOfLeadingZeros(x - 1))
+}
+
+/**
+ * Check if the Chunk containing the given [BlockPos] is loaded.
+ * Works for both [World] and [ChunkCache] (vanilla and OptiFine) instances.
+ */
+//fun IWorldReader.isBlockLoaded(pos: BlockPos) = when {
+//    this is World -> isBlockLoaded(pos, false)
+//    this is RenderChunkCache -> isworld.isBlockLoaded(pos, false)
+//    Refs.OptifineChunkCache.isInstance(this) -> (Refs.CCOFChunkCache.get(this) as ChunkCache).world.isBlockLoaded(pos, false)
+//    else -> false
+//}
+
+interface HasLogger {
+    val logger: Logger
+    val logName: String get() = this::class.simpleName!!
+    fun log(msg: String) = log(Level.INFO, msg)
+    fun log(level: Level, msg: String) = logger.log(level, "[$logName] $msg")
+    fun log(msg: String, e: Throwable) = log(Level.WARN, msg, e)
+    fun log(level: Level, msg: String, e: Throwable) = logger.log(level, "[$logName] $msg", e)
+}
+
+//fun textComponent(msg: String, color: Formatting = Formatting.GRAY): LiteralText {
+//    val style = Style().apply { this.color = color }
+//    return LiteralText(msg).apply { this.style = style }
+//}