[orx-shade-styles] convert to MPP

orx-shade-styles/src/commonMain/kotlin/NPointGradient.kt

@@ -0,0 +1,31 @@
+package org.openrndr.extra.shadestyles
+
+import org.openrndr.color.ColorRGBa
+import org.openrndr.draw.ShadeStyle
+import org.openrndr.extra.parameters.Description
+import org.openrndr.math.Vector2
+
+@Description("N-Point gradient")
+class NPointGradient(
+        colors: Array<ColorRGBa>,
+        points: Array<Vector2> = arrayOf(Vector2.ZERO)) : ShadeStyle() {
+
+    var colors: Array<ColorRGBa> by Parameter()
+    var points: Array<Vector2> by Parameter()
+
+    init {
+        this.colors = colors
+        this.points = points
+
+        fragmentTransform = """
+                float sum = 0;
+                vec4 rgba = vec4(0.0);
+                for(int i=0; i<p_points_SIZE; i++) {
+                    float dist = 1.0 / (1.0 + distance(p_points[i], c_screenPosition));
+                    sum += dist;
+                    rgba += p_colors[i] * dist;
+                }
+                x_fill = rgba/sum;
+        """
+    }
+}