Demos: ensure all use fun main() = application {

- Adjust some demo window sizes.
- Replace Random.double by Double.uniform
- Tweak some demos so screenshots look more interesting

orx-jvm/orx-minim/src/demo/kotlin/DemoFFT01.kt

@@ -1,38 +1,35 @@
 import ddf.minim.Minim
 import ddf.minim.analysis.FFT
 import ddf.minim.analysis.LanczosWindow
-
 import org.openrndr.application
 import org.openrndr.extra.minim.minim
 import org.openrndr.math.map
 import kotlin.math.ln
 
-fun main() {
-    application {
-        configure {
-            width = 1280
-            height = 720
+fun main() = application {
+    configure {
+        width = 1280
+        height = 720
+    }
+
+    program {
+        val minim = minim()
+        if (minim.lineOut == null) {
+            application.exit()
         }
 
-        program {
-            val minim = minim()
-            if (minim.lineOut == null) {
-                application.exit()
-            }
-
-            val lineIn = minim.getLineIn(Minim.MONO, 2048, 48000f)
-            if (lineIn == null) {
-                application.exit()
-            }
-            val fft = FFT(lineIn.bufferSize(), lineIn.sampleRate())
-            fft.window(LanczosWindow())
-            extend {
-                fft.forward(lineIn.mix)
-                for (i in 0 until 200) {
-                    val bandDB = 20.0 * ln(2.0 * fft.getBand(i) / fft.timeSize())
-                    drawer.rectangle(i * 5.0, height / 2.0, 5.0, bandDB.map(0.0, -150.0, 0.0, -height / 8.0))
-                }
+        val lineIn = minim.getLineIn(Minim.MONO, 2048, 48000f)
+        if (lineIn == null) {
+            application.exit()
+        }
+        val fft = FFT(lineIn.bufferSize(), lineIn.sampleRate())
+        fft.window(LanczosWindow())
+        extend {
+            fft.forward(lineIn.mix)
+            for (i in 0 until 200) {
+                val bandDB = 20.0 * ln(2.0 * fft.getBand(i) / fft.timeSize())
+                drawer.rectangle(i * 5.0, height / 2.0, 5.0, bandDB.map(0.0, -150.0, 0.0, -height / 8.0))
             }
         }
     }
-}
+}