From 4edd30c8c407ed520df533daeebf7c03e41a83d2 Mon Sep 17 00:00:00 2001
From: Jonathan Coates <git@squiddev.cc>
Date: Tue, 28 Apr 2026 09:46:26 +0100
Subject: [PATCH] Transform breaking overlay to match turtle's rotation

---
 .../render/TurtleBlockEntityRenderer.java     | 21 ++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/projects/common/src/client/java/dan200/computercraft/client/render/TurtleBlockEntityRenderer.java b/projects/common/src/client/java/dan200/computercraft/client/render/TurtleBlockEntityRenderer.java
index 049b4c4c6..98665803c 100644
--- a/projects/common/src/client/java/dan200/computercraft/client/render/TurtleBlockEntityRenderer.java
+++ b/projects/common/src/client/java/dan200/computercraft/client/render/TurtleBlockEntityRenderer.java
@@ -127,12 +127,17 @@ public class TurtleBlockEntityRenderer implements BlockEntityRenderer<TurtleBloc
             );
         }
 
-        // Then apply rotation and flip if needed.
-        transform.translate(0.5f, 0.5f, 0.5f);
-        transform.mulPose(Axis.YP.rotationDegrees(180.0f - state.yaw));
-        transform.translate(-0.5f, -0.5f, -0.5f);
+        // Then apply rotation
+        transform.rotateAround(Axis.YP.rotationDegrees(180.0f - state.yaw), 0.5f, 0.5f, 0.5f);
 
-        state.model.submit(transform, collector, state.lightCoords, OverlayTexture.NO_OVERLAY, state.colour == -1 ? -1 : ARGB.opaque(state.colour), state.breakProgress);
+        // And render our models.
+        state.model.submit(
+            transform, collector, state.lightCoords, OverlayTexture.NO_OVERLAY,
+            state.colour == -1 ? -1 : ARGB.opaque(state.colour),
+            // Similarly, translate the break progress so the breaking decal is applied in turtle-space, rather than
+            // world space.
+            state.breakProgress == null ? null : translateBreakProgress(state.breakProgress, state.yaw)
+        );
 
         if (state.overlay != null) {
             state.overlay.submit(transform, collector, state.lightCoords, OverlayTexture.NO_OVERLAY);
@@ -147,6 +152,12 @@ public class TurtleBlockEntityRenderer implements BlockEntityRenderer<TurtleBloc
         transform.popPose();
     }
 
+    private static ModelFeatureRenderer.CrumblingOverlay translateBreakProgress(ModelFeatureRenderer.CrumblingOverlay breakProgress, float yaw) {
+        var pose = breakProgress.cameraPose().copy();
+        pose.rotateAround(Axis.YP.rotationDegrees(180.0f - yaw), 0.5f, 0.5f, 0.5f);
+        return new ModelFeatureRenderer.CrumblingOverlay(breakProgress.progress(), pose);
+    }
+
     private void submitUpgrade(PoseStack transform, SubmitNodeCollector collector, int lightmapCoord, float angle, ItemStackRenderState state) {
         if (state.isEmpty()) return;
         transform.pushPose();