[orx-gradient-descent] convert to MPP

orx-gradient-descent/src/jvmTest/kotlin/TestMinimizeModel.kt

@@ -0,0 +1,34 @@
+import org.amshove.kluent.shouldBeNear
+import org.openrndr.extra.gradientdescent.minimizeModel
+import org.openrndr.math.Vector2
+import org.spekframework.spek2.Spek
+import org.spekframework.spek2.style.specification.describe
+
+object TestMinimizeModel : Spek({
+    describe("a model") {
+        val m = object {
+            var x = 0.0
+            var y = 0.0
+        }
+        it("can be minimized") {
+            minimizeModel(m) { m->
+                (m.x - 4.0) * (m.x - 4.0) + (m.y - 3.0) * (m.y - 3.0)
+            }
+            m.x.shouldBeNear(4.0, 0.01)
+            m.y.shouldBeNear(3.0, 0.01)
+        }
+    }
+
+    describe("a model with a Vector2 property") {
+        val m = object {
+            var position = Vector2.ZERO
+        }
+        it("can be minimized") {
+            minimizeModel(m) { m->
+                (m.position.x - 4.0) * (m.position.x - 4.0) + (m.position.y - 3.0) * (m.position.y - 3.0)
+            }
+            m.position.x.shouldBeNear(4.0, 0.01)
+            m.position.y.shouldBeNear(3.0, 0.01)
+        }
+    }
+})