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-shapes/src/jvmDemo/kotlin/primitives/DemoRectangleIntersection01.kt

@@ -8,33 +8,31 @@ import org.openrndr.extra.shapes.primitives.intersection
  * Demonstrate rectangle-rectangle intersection
  * @see <img src="https://raw.githubusercontent.com/openrndr/orx/media/orx-shapes/images/primitives-DemoRectangleIntersection01Kt.png">
  */
-fun main() {
-    application {
-        configure {
-            width = 720
-            height = 720
-        }
-        program {
-            val h = drawer.bounds.offsetEdges(-100.0, -10.0)
-            val v = drawer.bounds.offsetEdges(-10.0, -100.0)
+fun main() = application {
+    configure {
+        width = 720
+        height = 720
+    }
+    program {
+        val h = drawer.bounds.offsetEdges(-100.0, -10.0)
+        val v = drawer.bounds.offsetEdges(-10.0, -100.0)
 
-            extend {
-                drawer.clear(ColorRGBa.WHITE)
+        extend {
+            drawer.clear(ColorRGBa.WHITE)
 
-                /**
-                 * Find intersection
-                 */
-                val i = h.intersection(v)
-                drawer.fill = ColorRGBa.RED
-                drawer.rectangle(h)
+            /**
+             * Find intersection
+             */
+            val i = h.intersection(v)
+            drawer.fill = ColorRGBa.RED
+            drawer.rectangle(h)
 
-                drawer.fill = ColorRGBa.BLUE
-                drawer.rectangle(v)
+            drawer.fill = ColorRGBa.BLUE
+            drawer.rectangle(v)
 
-                drawer.fill = ColorRGBa.BLACK
-                drawer.stroke = ColorRGBa.WHITE
-                drawer.rectangle(i)
-            }
+            drawer.fill = ColorRGBa.BLACK
+            drawer.stroke = ColorRGBa.WHITE
+            drawer.rectangle(i)
         }
     }
-}
+}