[orx-fx] Add MultiplyU, MultiplyV and Square filters

orx-fx/src/commonMain/kotlin/math/MultiplyU.kt

@@ -0,0 +1,19 @@
+import org.openrndr.draw.Filter
+import org.openrndr.draw.filterShaderFromCode
+import org.openrndr.extra.fx.fx_film_grain
+import org.openrndr.extra.fx.fx_multiply_u
+import org.openrndr.extra.fx.mppFilterShader
+import org.openrndr.extra.parameters.BooleanParameter
+import org.openrndr.extra.parameters.Description
+import org.openrndr.extra.parameters.DoubleParameter
+/**
+ * Multiply by u coordinate
+ */
+@Description("multiply u")
+class MultiplyU : Filter(filterShaderFromCode(fx_multiply_u, "multiply-u")) {
+    @DoubleParameter("multiplication bias", 0.0, 2.0)
+    var bias: Double by parameters
+    init {
+        bias = 0.0
+    }
+}

orx-fx/src/commonMain/kotlin/math/MultiplyV.kt

@@ -0,0 +1,22 @@
+import org.openrndr.draw.Filter
+import org.openrndr.draw.filterShaderFromCode
+import org.openrndr.extra.fx.fx_multiply_v
+import org.openrndr.extra.parameters.BooleanParameter
+import org.openrndr.extra.parameters.Description
+import org.openrndr.extra.parameters.DoubleParameter
+/**
+ * Multiply by v coordinate
+ */
+@Description("multiply v")
+class MultiplyV : Filter(filterShaderFromCode(fx_multiply_v, "multiply-v")) {
+    @DoubleParameter("multiplication bias", 0.0, 2.0)
+    var bias: Double by parameters
+
+    @BooleanParameter("invert v")
+    var invertV: Boolean by parameters
+
+    init {
+        bias = 0.0
+        invertV = false
+    }
+}

orx-fx/src/commonMain/kotlin/math/Square.kt

@@ -0,0 +1,10 @@
+import org.openrndr.draw.Filter
+import org.openrndr.draw.filterShaderFromCode
+import org.openrndr.extra.fx.fx_square
+import org.openrndr.extra.parameters.Description
+/**
+ * Square input texture values
+ */
+@Description("square")
+class Square : Filter(filterShaderFromCode(fx_square, "square")) {
+}