Add arc builders to scheme

maps-kt-scheme/build.gradle.kts

@@ -5,6 +5,7 @@ import space.kscience.gradle.KScienceVersions.JVM_TARGET
 plugins {
     kotlin("multiplatform")
     id("org.jetbrains.compose")
+    `maven-publish`
 }
 
 kotlin {

maps-kt-scheme/src/commonMain/kotlin/center/sciprog/maps/scheme/SchemeCoordinates.kt

@@ -11,7 +11,14 @@ data class SchemeCoordinates(val x: Float, val y: Float)
 data class SchemeRectangle(
     val a: SchemeCoordinates,
     val b: SchemeCoordinates,
+) {
+    companion object {
+        fun square(center: SchemeCoordinates, height: Float, width: Float): SchemeRectangle = SchemeRectangle(
+            SchemeCoordinates(center.x - width / 2, center.y - height / 2),
+            SchemeCoordinates(center.x + width / 2, center.y + height / 2),
         )
+    }
+}
 
 val SchemeRectangle.top get() = max(a.y, b.y)
 val SchemeRectangle.bottom get() = min(a.y, b.y)

maps-kt-scheme/src/commonMain/kotlin/center/sciprog/maps/scheme/SchemeFeatureState.kt

@@ -129,6 +129,37 @@ fun SchemeFeaturesState.line(
     id: FeatureId? = null,
 ) = addFeature(id, SchemeLineFeature(aCoordinates.toCoordinates(), bCoordinates.toCoordinates(), scaleRange, color))
 
+public fun SchemeFeaturesState.arc(
+    oval: SchemeRectangle,
+    startAngle: Float,
+    arcLength: Float,
+    scaleRange: FloatRange = defaultScaleRange,
+    color: Color = Color.Red,
+    id: FeatureId? = null,
+): FeatureId = addFeature(
+    id,
+    SchemeArcFeature(oval, startAngle, arcLength, scaleRange, color)
+)
+
+public fun SchemeFeaturesState.arc(
+    center: Pair<Double, Double>,
+    radius: Float,
+    startAngle: Float,
+    arcLength: Float,
+    scaleRange: FloatRange = defaultScaleRange,
+    color: Color = Color.Red,
+    id: FeatureId? = null,
+): FeatureId = addFeature(
+    id,
+    SchemeArcFeature(
+        oval = SchemeRectangle.square(center.toCoordinates(), radius, radius),
+        startAngle = startAngle,
+        arcLength = arcLength,
+        scaleRange = scaleRange,
+        color = color
+    )
+)
+
 fun SchemeFeaturesState.text(
     position: SchemeCoordinates,
     text: String,