[orx-fcurve] Add polar and spherical compound curves, refactor, add tests

orx-fcurve/src/commonTest/kotlin/TestEFCurve.kt

@@ -0,0 +1,33 @@
+import org.openrndr.extra.fcurve.efcurve
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class TestEFCurve {
+    @Test
+    fun comments() {
+        val text = """M1 |h5 m3|{
+        |10.3 # toch wel handig zo'n comment
+        |11.2
+        |14.5
+        |}
+    """.trimMargin()
+        assertEquals("M1 h5 m3 h5 m3 h5 m3", efcurve(text))
+    }
+
+    @Test
+    fun expressions() {
+        assertEquals("M9.0", efcurve("M_4 + 5_"))
+    }
+
+    @Test
+    fun listExpansion() {
+        assertEquals("M0 L1.0, 3.0 L1.0, 6.0", efcurve("M0 |L1.0, _it_|{3, 6}"))
+    }
+
+    @Test
+    fun repetition() {
+        assertEquals("M0 L1.0, 3.0 L1.0, 3.0", efcurve("M0 |L1.0, 3.0|[2]"))
+        assertEquals("M0 L1.0, 0.0 L1.0, 1.0", efcurve("M0 |L1.0, _it_|[2]"))
+        assertEquals("M0 L1.0, 0.0 L1.0, 1.0 L1.0, 0.0 L1.0, 1.0 L1.0, 0.0 L1.0, 1.0", efcurve("M0 ||L1.0, _it_|[2]|[3]"))
+    }
+}