[orx-camera] convert to MPP

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

@@ -8,6 +8,7 @@ import org.openrndr.math.Matrix44
 import org.openrndr.math.Spherical
 import org.openrndr.math.Vector3
 import kotlin.math.abs
+import kotlin.math.pow
 import org.openrndr.math.transforms.lookAt as lookAt_
 
 enum class ProjectionType {
@@ -69,12 +70,12 @@ class OrbitalCamera(eye: Vector3 = Vector3.ZERO, lookAt: Vector3 = Vector3.UNIT_
     }
 
     fun dollyIn() {
-        val zoomScale = Math.pow(0.95, zoomSpeed)
+        val zoomScale = pow(0.95, zoomSpeed)
         dolly(sphericalEnd.radius * zoomScale - sphericalEnd.radius)
     }
 
     fun dollyOut() {
-        val zoomScale = Math.pow(0.95, zoomSpeed)
+        val zoomScale = pow(0.95, zoomSpeed)
         dolly(sphericalEnd.radius / zoomScale - sphericalEnd.radius)
     }
 
@@ -218,4 +219,6 @@ fun OrbitalCamera.applyTo(drawer: Drawer) {
         drawer.drawStyle.depthWrite = true
         drawer.drawStyle.depthTestPass = DepthTestPass.LESS_OR_EQUAL
     }
-}
+}
+
+private fun pow(a:Double, x:Double): Double = a.pow(x)

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

@@ -3,6 +3,7 @@ package org.openrndr.extras.camera
 import org.openrndr.*
 import org.openrndr.math.Vector2
 import org.openrndr.math.Vector3
+import org.openrndr.math.asRadians
 import kotlin.math.PI
 import kotlin.math.abs
 import kotlin.math.tan
@@ -51,7 +52,7 @@ class OrbitalControls(val orbitalCamera: OrbitalCamera, val userInteraction: Boo
                 val offset = Vector3.fromSpherical(orbitalCamera.spherical) - orbitalCamera.lookAt
 
                 // half of the fov is center to top of screen
-                val targetDistance = offset.length * tan((Math.toRadians((fov) / 2)))
+                val targetDistance = offset.length * tan(fov / 2).asRadians
                 val panX = (2 * delta.x * targetDistance / program.window.size.x)
                 val panY = (2 * delta.y * targetDistance / program.window.size.y)