create AdjacentPatternLocator

common/addons/config-locators/src/main/java/com/dfsek/terra/addons/feature/locator/LocatorAddon.java

@@ -11,6 +11,7 @@ import com.dfsek.tectonic.api.config.template.object.ObjectTemplate;
 
 import java.util.function.Supplier;
 
+import com.dfsek.terra.addons.feature.locator.config.AdjacentPatternLocatorTemplate;
 import com.dfsek.terra.addons.feature.locator.config.AndLocatorTemplate;
 import com.dfsek.terra.addons.feature.locator.config.GaussianRandomLocatorTemplate;
 import com.dfsek.terra.addons.feature.locator.config.Sampler3DLocatorTemplate;
@@ -63,6 +64,7 @@ public class LocatorAddon implements AddonInitializer {
                     locatorRegistry.register(addon.key("GAUSSIAN_RANDOM"), GaussianRandomLocatorTemplate::new);
                     
                     locatorRegistry.register(addon.key("PATTERN"), PatternLocatorTemplate::new);
+                    locatorRegistry.register(addon.key("ADJACENT_PATTERN"), AdjacentPatternLocatorTemplate::new);
                     
                     locatorRegistry.register(addon.key("SAMPLER"), SamplerLocatorTemplate::new);
                     locatorRegistry.register(addon.key("SAMPLER_3D"), Sampler3DLocatorTemplate::new);

common/addons/config-locators/src/main/java/com/dfsek/terra/addons/feature/locator/config/AdjacentPatternLocatorTemplate.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2020-2021 Polyhedral Development
+ *
+ * The Terra Core Addons are licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in this module's root directory.
+ */
+
+package com.dfsek.terra.addons.feature.locator.config;
+
+import com.dfsek.tectonic.api.config.template.annotations.Value;
+import com.dfsek.tectonic.api.config.template.object.ObjectTemplate;
+
+import com.dfsek.terra.addons.feature.locator.locators.AdjacentPatternLocator;
+import com.dfsek.terra.addons.feature.locator.patterns.Pattern;
+import com.dfsek.terra.api.config.meta.Meta;
+import com.dfsek.terra.api.structure.feature.Locator;
+import com.dfsek.terra.api.util.Range;
+
+
+public class AdjacentPatternLocatorTemplate implements ObjectTemplate<Locator> {
+    @Value("range")
+    private @Meta Range range;
+    
+    @Value("pattern")
+    private @Meta Pattern pattern;
+    
+    @Override
+    public Locator get() {
+        return new AdjacentPatternLocator(pattern, range);
+    }
+}

common/addons/config-locators/src/main/java/com/dfsek/terra/addons/feature/locator/locators/AdjacentPatternLocator.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2020-2021 Polyhedral Development
+ *
+ * The Terra Core Addons are licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in this module's root directory.
+ */
+
+package com.dfsek.terra.addons.feature.locator.locators;
+
+import com.dfsek.terra.addons.feature.locator.patterns.Pattern;
+import com.dfsek.terra.api.structure.feature.BinaryColumn;
+import com.dfsek.terra.api.structure.feature.Locator;
+import com.dfsek.terra.api.util.Range;
+import com.dfsek.terra.api.world.chunk.generation.util.Column;
+
+
+public class AdjacentPatternLocator implements Locator {
+    private final Pattern pattern;
+    private final Range search;
+    
+    public AdjacentPatternLocator(Pattern pattern, Range search) {
+        this.pattern = pattern;
+        this.search = search;
+    }
+    
+    @Override
+    public BinaryColumn getSuitableCoordinates(Column<?> column) {
+        BinaryColumn locations = new BinaryColumn(column.getMinY(), column.getMaxY());
+        
+        for(int y : search) {
+            if(isValid(y, column)) locations.set(y);
+        }
+        
+        return locations;
+    }
+    
+    private boolean isValid(int y, Column<?> column) {
+        return pattern.matches(y, column.adjacent(0, -1)) ||
+               pattern.matches(y, column.adjacent(0, 1)) ||
+               pattern.matches(y, column.adjacent(-1, 0)) ||
+               pattern.matches(y, column.adjacent(1, 0));
+    }
+}