From 24e220bb29a01e60e4e05ff7e509ba35f395b01a Mon Sep 17 00:00:00 2001
From: Sollace <sollacea@gmail.com>
Date: Wed, 27 Sep 2023 12:11:20 +0100
Subject: [PATCH] Allow armor to render with translucency

---
 .../client/render/ArmorRenderLayers.java      | 33 +++++++++++++++++++
 .../client/render/MagicGlow.java              |  5 ++-
 .../render/entity/feature/ArmourFeature.java  |  7 ++--
 3 files changed, 38 insertions(+), 7 deletions(-)
 create mode 100644 src/main/java/com/minelittlepony/client/render/ArmorRenderLayers.java

diff --git a/src/main/java/com/minelittlepony/client/render/ArmorRenderLayers.java b/src/main/java/com/minelittlepony/client/render/ArmorRenderLayers.java
new file mode 100644
index 00000000..261732a3
--- /dev/null
+++ b/src/main/java/com/minelittlepony/client/render/ArmorRenderLayers.java
@@ -0,0 +1,33 @@
+package com.minelittlepony.client.render;
+
+import net.minecraft.client.render.*;
+import net.minecraft.client.render.RenderLayer.MultiPhaseParameters;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.Util;
+
+import java.util.function.BiFunction;
+
+public class ArmorRenderLayers extends RenderPhase {
+    private ArmorRenderLayers() {
+        super(null, null, null);
+    }
+
+    private static final BiFunction<Identifier, Boolean, RenderLayer> ARMOR_TRANSLUCENT_NO_CULL = Util.memoize((texture, decal) -> {
+        return RenderLayer.of(decal ? "armor_decal_translucent_no_cull" : "armor_translucent_no_cull",
+                VertexFormats.POSITION_COLOR_TEXTURE_OVERLAY_LIGHT_NORMAL, VertexFormat.DrawMode.QUADS, 256, true, false, MultiPhaseParameters.builder()
+            .program(ARMOR_CUTOUT_NO_CULL_PROGRAM)
+            .texture(new RenderPhase.Texture(texture, false, false))
+            .transparency(TRANSLUCENT_TRANSPARENCY)
+            .cull(DISABLE_CULLING)
+            .lightmap(ENABLE_LIGHTMAP)
+            .overlay(ENABLE_OVERLAY_COLOR)
+            .layering(VIEW_OFFSET_Z_LAYERING)
+            .depthTest(decal ? EQUAL_DEPTH_TEST : LEQUAL_DEPTH_TEST)
+            .build(true)
+        );
+    });
+
+    public static RenderLayer getArmorTranslucentNoCull(Identifier texture, boolean decal) {
+        return ARMOR_TRANSLUCENT_NO_CULL.apply(texture, decal);
+    }
+}
diff --git a/src/main/java/com/minelittlepony/client/render/MagicGlow.java b/src/main/java/com/minelittlepony/client/render/MagicGlow.java
index 4c868829..fc40525f 100644
--- a/src/main/java/com/minelittlepony/client/render/MagicGlow.java
+++ b/src/main/java/com/minelittlepony/client/render/MagicGlow.java
@@ -16,8 +16,8 @@ import java.util.function.BiFunction;
 import java.util.function.Supplier;
 
 public abstract class MagicGlow extends RenderPhase {
-    private MagicGlow(String name, Runnable beginAction, Runnable endAction) {
-        super(name, beginAction, endAction);
+    private MagicGlow() {
+        super(null, null, null);
     }
 
     private static final Supplier<RenderLayer> MAGIC = Suppliers.memoize(() -> {
@@ -54,7 +54,6 @@ public abstract class MagicGlow extends RenderPhase {
     }
 
     private static class Colored extends Texture {
-
         private final float red;
         private final float green;
         private final float blue;
diff --git a/src/main/java/com/minelittlepony/client/render/entity/feature/ArmourFeature.java b/src/main/java/com/minelittlepony/client/render/entity/feature/ArmourFeature.java
index 212e9cf0..5c45739a 100644
--- a/src/main/java/com/minelittlepony/client/render/entity/feature/ArmourFeature.java
+++ b/src/main/java/com/minelittlepony/client/render/entity/feature/ArmourFeature.java
@@ -97,7 +97,7 @@ public class ArmourFeature<T extends LivingEntity, M extends EntityModel<T> & IP
     }
 
     private static VertexConsumer getArmorConsumer(VertexConsumerProvider provider, Identifier texture, boolean glint) {
-        return ItemRenderer.getArmorGlintConsumer(provider, RenderLayer.getArmorCutoutNoCull(texture), false, glint);
+        return ItemRenderer.getArmorGlintConsumer(provider, ArmorRenderLayers.getArmorTranslucentNoCull(texture, false), false, glint);
     }
 
     private static VertexConsumer getTrimConsumer(VertexConsumerProvider provider, ArmorMaterial material, ArmorTrim trim, ArmourLayer layer, boolean glint) {
@@ -105,9 +105,8 @@ public class ArmourFeature<T extends LivingEntity, M extends EntityModel<T> & IP
         Sprite sprite = armorTrimsAtlas.getSprite(
             layer == ArmourLayer.INNER ? trim.getLeggingsModelId(material) : trim.getGenericModelId(material)
         );
+        RenderLayer renderLayer = ArmorRenderLayers.getArmorTranslucentNoCull(TexturedRenderLayers.ARMOR_TRIMS_ATLAS_TEXTURE, trim.getPattern().value().decal());
 
-        return sprite.getTextureSpecificVertexConsumer(
-            ItemRenderer.getDirectItemGlintConsumer(provider, TexturedRenderLayers.getArmorTrims(), true, glint)
-        );
+        return sprite.getTextureSpecificVertexConsumer(ItemRenderer.getDirectItemGlintConsumer(provider, renderLayer, true, glint));
     }
 }