2 files changed, 61 insertions, 1 deletions
diff --git a/src/main/java/gtPlusPlus/api/recipe/GTPPRecipeMaps.java b/src/main/java/gtPlusPlus/api/recipe/GTPPRecipeMaps.java
index 9d02865c5b..3977d69fe7 100644
--- a/src/main/java/gtPlusPlus/api/recipe/GTPPRecipeMaps.java
+++ b/src/main/java/gtPlusPlus/api/recipe/GTPPRecipeMaps.java
@@ -115,7 +115,7 @@ public class GTPPRecipeMaps {
             .of("gtpp.recipe.RTGgenerators", FuelBackend::new).maxIO(1, 0, 0, 0)
             .neiSpecialInfoFormatter(new SimpleSpecialValueFormatter("gtpp.nei.rtg.days", 365)).build();
     public static final RecipeMap<RecipeMapBackend> thermalBoilerRecipes = RecipeMapBuilder
-            .of("gtpp.recipe.thermalgeneratorfuel").maxIO(9, 9, 3, 3).frontend(LargeNEIFrontend::new).build();
+            .of("gtpp.recipe.thermalgeneratorfuel").maxIO(0, 9, 2, 3).frontend(ThermalBoilerFrontend::new).build();
     public static final RecipeMap<RecipeMapBackend> solarTowerRecipes = RecipeMapBuilder.of("gtpp.recipe.solartower")
             .maxIO(0, 0, 1, 1)
             .neiSpecialInfoFormatter(
diff --git a/src/main/java/gtPlusPlus/api/recipe/ThermalBoilerFrontend.java b/src/main/java/gtPlusPlus/api/recipe/ThermalBoilerFrontend.java
new file mode 100644
index 0000000000..9c78519765
--- /dev/null
+++ b/src/main/java/gtPlusPlus/api/recipe/ThermalBoilerFrontend.java
@@ -0,0 +1,60 @@
+package gtPlusPlus.api.recipe;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.annotation.ParametersAreNonnullByDefault;
+
+import com.gtnewhorizons.modularui.api.math.Pos2d;
+
+import gregtech.api.recipe.BasicUIPropertiesBuilder;
+import gregtech.api.recipe.NEIRecipePropertiesBuilder;
+import gregtech.api.recipe.maps.LargeNEIFrontend;
+import gregtech.api.util.MethodsReturnNonnullByDefault;
+import gregtech.common.gui.modularui.UIHelper;
+import gregtech.nei.RecipeDisplayInfo;
+import gregtech.nei.formatter.INEISpecialInfoFormatter;
+
+@ParametersAreNonnullByDefault
+@MethodsReturnNonnullByDefault
+public class ThermalBoilerFrontend extends LargeNEIFrontend {
+
+    private static final int tileSize = 18;
+    private static final int xOrigin = 16;
+    private static final int yOrigin = 8 + tileSize; // Aligned with second row of output items.
+    private static final int maxInputs = 3;
+
+    public ThermalBoilerFrontend(BasicUIPropertiesBuilder uiPropertiesBuilder,
+            NEIRecipePropertiesBuilder neiPropertiesBuilder) {
+        super(
+                uiPropertiesBuilder,
+                neiPropertiesBuilder.neiSpecialInfoFormatter(new ThermalBoilerSpecialValueFormatter()));
+    }
+
+    @Override
+    public List<Pos2d> getFluidInputPositions(int fluidInputCount) {
+        return UIHelper.getGridPositions(
+                fluidInputCount,
+                xOrigin + tileSize * (maxInputs - fluidInputCount),
+                yOrigin,
+                maxInputs);
+    }
+
+    private static class ThermalBoilerSpecialValueFormatter implements INEISpecialInfoFormatter {
+
+        @Override
+        public List<String> format(RecipeDisplayInfo recipeInfo) {
+            // TODO: Translation.
+            List<String> result = new ArrayList<>();
+            result.add("Steam output shown");
+            result.add("at maximum efficiency.");
+
+            if (recipeInfo.recipe.mSpecialValue == -1) {
+                result.add("Without a Lava Filter,");
+                result.add("only Obsidian is produced.");
+            }
+
+            return result;
+        }
+    }
+}