Add CMYKHalftone, LumaSobel, DropShadow and segmented waves

orx-fx/src/main/kotlin/dither/CMYKHalftone.kt

@@ -0,0 +1,27 @@
+package org.openrndr.extra.fx.dither
+
+import org.openrndr.draw.Filter
+import org.openrndr.draw.Shader
+import org.openrndr.extra.fx.filterFragmentCode
+import org.openrndr.extra.parameters.Description
+import org.openrndr.extra.parameters.DoubleParameter
+
+@Description("CMYK Halftone")
+class CMYKHalftone: Filter(Shader.createFromCode(filterVertexCode, filterFragmentCode("dither/cmyk-halftone.frag"))) {
+
+    @DoubleParameter("scale", 1.0, 30.0, precision = 4)
+    var scale: Double by parameters
+
+    @DoubleParameter("dotSize", 1.0, 3.0, precision = 4)
+    var dotSize: Double by parameters
+
+
+    @DoubleParameter("rotation", -180.0, 180.0)
+    var rotation: Double by parameters
+
+    init {
+        scale = 3.0
+        rotation = 0.0
+        dotSize = 1.0
+    }
+}