diff --git a/demo/playground/src/jvmMain/kotlin/antenna.kt b/demo/playground/src/jvmMain/kotlin/antenna.kt
index 5b92f46f..cd711d11 100644
--- a/demo/playground/src/jvmMain/kotlin/antenna.kt
+++ b/demo/playground/src/jvmMain/kotlin/antenna.kt
@@ -1,16 +1,27 @@
 package space.kscience.visionforge.examples
 
 import space.kscience.kmath.complex.Quaternion
-import space.kscience.kmath.geometry.RotationOrder
+import space.kscience.kmath.complex.QuaternionField
+import space.kscience.kmath.geometry.Angle
+import space.kscience.kmath.geometry.Euclidean3DSpace
 import space.kscience.kmath.geometry.degrees
-import space.kscience.kmath.geometry.fromEuler
+import space.kscience.kmath.geometry.fromRotation
 import space.kscience.visionforge.html.ResourceLocation
 import space.kscience.visionforge.solid.*
 import kotlin.math.PI
 
 fun main() = makeVisionFile(resourceLocation = ResourceLocation.SYSTEM) {
 
-    val direction = Quaternion.fromEuler( 45.degrees, 45.degrees, 0.degrees, RotationOrder.XYZ)
+    val azimuth = 60.degrees
+    val inclination = 15.degrees
+
+    val direction = with(QuaternionField) {
+        Quaternion.fromRotation(-azimuth, Euclidean3DSpace.zAxis) *
+                Quaternion.fromRotation(Angle.piDiv2 - inclination, Euclidean3DSpace.yAxis)
+    }
+
+    //val direction2 = Quaternion.fromEuler(Angle.zero, Angle.piDiv2 - inclination, -azimuth, RotationOrder.ZYX)
+
 
     vision("canvas") {
         requirePlugin(Solids)
@@ -21,9 +32,6 @@ fun main() = makeVisionFile(resourceLocation = ResourceLocation.SYSTEM) {
             ambientLight()
             cylinder(50, 5, name = "base")
             solidGroup("frame") {
-                rotationY = PI/2
-                rotationX = -PI/2
-                rotationZ = -PI/2
                 z = 60
                 axes(200)
                 solidGroup("antenna") {
@@ -35,7 +43,7 @@ fun main() = makeVisionFile(resourceLocation = ResourceLocation.SYSTEM) {
                     cylinder(5, 30) {
                         z = 15
                     }
-                    this.quaternion = direction
+                    quaternion = direction
                 }
             }
         }