Fixes and move to jvmDemo (#286)

orx-camera/src/jvmDemo/kotlin/DemoOrbitalCamera01.kt

@@ -0,0 +1,52 @@
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.draw.DrawPrimitive
+import org.openrndr.extra.camera.AxisHelper
+import org.openrndr.extra.camera.GridHelper
+import org.openrndr.extra.camera.OrbitalCamera
+import org.openrndr.extra.camera.OrbitalControls
+import org.openrndr.extra.meshgenerators.boxMesh
+import org.openrndr.extra.meshgenerators.sphereMesh
+import org.openrndr.math.Vector3
+
+fun main() = application {
+    program {
+        val camera = OrbitalCamera(
+            Vector3.UNIT_Z * 90.0, Vector3.ZERO, 90.0, 0.1, 5000.0
+        )
+        val controls = OrbitalControls(camera, keySpeed = 10.0)
+        controls.userInteraction = false
+
+        val sphere = sphereMesh(radius = 25.0)
+        val cube = boxMesh(20.0, 20.0, 5.0, 5, 5, 2)
+
+        extend(camera)
+
+        // shows XYZ axes as RGB lines
+        extend(AxisHelper())
+
+        // debug ground plane
+        extend(GridHelper(100))
+
+        // adds mouse and keyboard bindings
+        extend(controls)
+
+        extend {
+            // mouse and keyboard input can be toggled on and off
+            controls.userInteraction = seconds.toInt() % 4 < 2
+
+            drawer.vertexBuffer(sphere, DrawPrimitive.LINE_LOOP)
+            drawer.vertexBuffer(cube, DrawPrimitive.LINE_LOOP)
+
+            drawer.stroke = if(controls.userInteraction) ColorRGBa.GREEN else ColorRGBa.WHITE
+            drawer.fill = null
+
+            repeat(10) {
+                drawer.translate(0.0, 0.0, 10.0)
+                // Note: 2D primitives are not optimized for 3D and can
+                // occlude each other
+                drawer.circle(0.0, 0.0, 50.0)
+            }
+        }
+    }
+}