1 files changed, 40 insertions, 0 deletions
diff --git a/src/main/kotlin/util/collections/RangeUtil.kt b/src/main/kotlin/util/collections/RangeUtil.kt
new file mode 100644
index 0000000..a7029ac
--- /dev/null
+++ b/src/main/kotlin/util/collections/RangeUtil.kt
@@ -0,0 +1,40 @@
+package moe.nea.firmament.util.collections
+
+import kotlin.math.floor
+
+val ClosedFloatingPointRange<Float>.centre get() = (endInclusive + start) / 2
+
+fun ClosedFloatingPointRange<Float>.nonNegligibleSubSectionsAlignedWith(
+	interval: Float
+): Iterable<Float> {
+	require(interval.isFinite())
+	val range = this
+	return object : Iterable<Float> {
+		override fun iterator(): Iterator<Float> {
+			return object : FloatIterator() {
+				var polledValue: Float = range.start
+				var lastValue: Float = polledValue
+
+				override fun nextFloat(): Float {
+					if (!hasNext()) throw NoSuchElementException()
+					lastValue = polledValue
+					polledValue = Float.NaN
+					return lastValue
+				}
+
+				override fun hasNext(): Boolean {
+					if (!polledValue.isNaN()) {
+						return true
+					}
+					if (lastValue == range.endInclusive)
+						return false
+					polledValue = (floor(lastValue / interval) + 1) * interval
+					if (polledValue > range.endInclusive) {
+						polledValue = range.endInclusive
+					}
+					return true
+				}
+			}
+		}
+	}
+}