Implement simplex mask (fixes #437)

worldedit-core/src/main/java/com/sk89q/worldedit/extension/factory/MaskFactory.java

@@ -69,7 +69,7 @@ public final class MaskFactory extends AbstractFactory<Mask> {
         register(new XAxisMaskParser(worldEdit));
         register(new YAxisMaskParser(worldEdit));
         register(new ZAxisMaskParser(worldEdit));
-
+        register(new SimplexMaskParser(worldEdit));
 
     }
 

worldedit-core/src/main/java/com/sk89q/worldedit/extension/factory/parser/RichParser.java

@@ -1,6 +1,5 @@
 package com.sk89q.worldedit.extension.factory.parser;
 
-import com.sk89q.util.StringUtil;
 import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.extension.input.InputParseException;
 import com.sk89q.worldedit.extension.input.ParserContext;
@@ -115,4 +114,40 @@ public abstract class RichParser<E> extends InputParser<E> {
         }
         return arguments.toArray(new String[0]);
     }
+
+    /**
+     * Returns a stream of suggestions for positive doubles.
+     *
+     * @param argumentInput the given input to filter with.
+     * @return a stream of suggestions.
+     */
+    protected Stream<String> suggestPositiveDoubles(String argumentInput) {
+        if (argumentInput.isEmpty()) {
+            return Stream.of("1", "2", "3", "4", "5", "6", "7", "8", "9");
+        }
+        // if already a valid number, suggest more digits
+        if (isDouble(argumentInput)) {
+            Stream<String> numbers = Stream.of("", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9");
+            if (argumentInput.indexOf('.') == -1) {
+                numbers = Stream.concat(numbers, Stream.of("."));
+            }
+            return numbers.map(s -> argumentInput + s);
+        }
+        // no valid input anymore
+        return Stream.empty();
+    }
+
+    private static boolean isDouble(String input) {
+        boolean point = false;
+        for (char c : input.toCharArray()) {
+            if (!Character.isDigit(c)) {
+                if (c == '.' && !point) {
+                    point = true;
+                } else {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
 }

worldedit-core/src/main/java/com/sk89q/worldedit/extension/factory/parser/mask/SimplexMaskParser.java

@@ -0,0 +1,39 @@
+package com.sk89q.worldedit.extension.factory.parser.mask;
+
+import com.boydti.fawe.object.mask.SimplexMask;
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.extension.factory.parser.RichParser;
+import com.sk89q.worldedit.extension.input.InputParseException;
+import com.sk89q.worldedit.extension.input.ParserContext;
+import com.sk89q.worldedit.function.mask.Mask;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.stream.Stream;
+
+public class SimplexMaskParser extends RichParser<Mask> {
+    private static final String SIMPLEX_PREFIX = "#simplex";
+
+    public SimplexMaskParser(WorldEdit worldEdit) {
+        super(worldEdit, SIMPLEX_PREFIX);
+    }
+
+    @Override
+    protected Stream<String> getSuggestions(String argumentInput, int index) {
+        if (index < 3) {
+            suggestPositiveDoubles(argumentInput);
+        }
+        return Stream.empty();
+    }
+
+    @Override
+    protected Mask parseFromInput(@NotNull String[] arguments, ParserContext context) throws InputParseException {
+        if (arguments.length != 3) return null;
+        double scale = Double.parseDouble(arguments[0]);
+        double min = Double.parseDouble(arguments[1]);
+        double max = Double.parseDouble(arguments[2]);
+        scale = 1d / Math.max(1d, scale);
+        min = (min - 50d) / 50d;
+        max = (max - 50d) / 50d;
+        return new SimplexMask(scale, min, max);
+    }
+}

worldedit-core/src/main/java/com/sk89q/worldedit/extension/factory/parser/pattern/SimplexPatternParser.java

@@ -22,19 +22,7 @@ public class SimplexPatternParser extends RichParser<Pattern> {
     @Override
     protected Stream<String> getSuggestions(String argumentInput, int index) {
         if (index == 0) {
-            if (argumentInput.isEmpty()) {
-                return Stream.of("1", "2", "3", "4", "5", "6", "7", "8", "9");
-            }
-            // if already a valid number, suggest more digits
-            if (isDouble(argumentInput)) {
-                Stream<String> numbers = Stream.of("", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9");
-                if (argumentInput.indexOf('.') == -1) {
-                    numbers = Stream.concat(numbers, Stream.of("."));
-                }
-                return numbers.map(s -> argumentInput + s);
-            }
-            // no valid input anymore
-            return Stream.empty();
+            return suggestPositiveDoubles(argumentInput);
         }
         if (index == 1) {
             return worldEdit.getPatternFactory().getSuggestions(argumentInput).stream();
@@ -58,18 +46,4 @@ public class SimplexPatternParser extends RichParser<Pattern> {
             throw new InputParseException("Pattern " + inner.getClass().getSimpleName() + " cannot be used with #simplex");
         }
     }
-
-    private static boolean isDouble(String input) {
-        boolean point = false;
-        for (char c : input.toCharArray()) {
-            if (!Character.isDigit(c)) {
-                if (c == '.' && !point) {
-                    point = true;
-                } else {
-                    return false;
-                }
-            }
-        }
-        return true;
-    }
 }