[orx-camera] convert to MPP

orx-camera/src/commonMain/kotlin/Orbital.kt

@@ -0,0 +1,46 @@
+package org.openrndr.extras.camera
+
+import org.openrndr.Extension
+import org.openrndr.Program
+import org.openrndr.draw.Drawer
+import org.openrndr.math.Vector3
+
+/**
+ * Extension that provides orbital camera view and controls.
+ */
+class Orbital : Extension {
+    override var enabled: Boolean = true
+
+    var eye = Vector3.UNIT_Z * 10.0
+    var lookAt = Vector3.ZERO
+    var near = 0.1
+    var far = 1000.0
+    var fov = 90.0
+    var userInteraction = true
+    var keySpeed = 1.0
+    var projectionType = ProjectionType.PERSPECTIVE
+
+    /**
+     * Damping factor for camera motion, set to 0 for no damping
+     */
+    var dampingFactor = 0.05
+
+    val camera by lazy {
+        OrbitalCamera(eye, lookAt, fov, near, far, projectionType).apply {
+            dampingFactor = this@Orbital.dampingFactor
+        }
+    }
+    val controls by lazy { OrbitalControls(camera, userInteraction, keySpeed) }
+
+    override fun setup(program: Program) {
+        controls.setup(program)
+    }
+
+    override fun beforeDraw(drawer: Drawer, program: Program) {
+        camera.beforeDraw(drawer, program)
+    }
+
+    override fun afterDraw(drawer: Drawer, program: Program) {
+        camera.afterDraw(drawer, program)
+    }
+}