Fixed NPE is B3D loader caused by the missing vertex normal; updated the example chest model - it's now has 2 meshes; Updated ModelAnimationDebug - it now uses the new chest model, renders the base with the static world renderer, and only the lid with the TESR.

src/main/java/net/minecraftforge/client/model/b3d/B3DModel.java

@@ -636,13 +636,19 @@ public class B3DModel
             Vector3f rPos = new Vector3f(newPos.x / newPos.w, newPos.y / newPos.w, newPos.z / newPos.w);
 
             // normal
-            Matrix3f tm = new Matrix3f();
-            t.getRotationScale(tm);
-            tm.invert();
-            tm.transpose();
-            Vector3f normal = new Vector3f(this.normal), rNormal = new Vector3f();
-            tm.transform(normal, rNormal);
-            rNormal.normalize();
+            Vector3f rNormal = null;
+
+            if(this.normal != null)
+            {
+                Matrix3f tm = new Matrix3f();
+                t.getRotationScale(tm);
+                tm.invert();
+                tm.transpose();
+                Vector3f normal = new Vector3f(this.normal);
+                rNormal = new Vector3f();
+                tm.transform(normal, rNormal);
+                rNormal.normalize();
+            }
 
             // texCoords TODO
             return new Vertex(rPos, rNormal, color, texCoords);

src/test/java/net/minecraftforge/debug/ModelAnimationDebug.java

@@ -4,6 +4,7 @@ import net.minecraft.block.Block;
 import net.minecraft.block.BlockPistonBase;
 import net.minecraft.block.material.Material;
 import net.minecraft.block.properties.IProperty;
+import net.minecraft.block.properties.PropertyBool;
 import net.minecraft.block.properties.PropertyDirection;
 import net.minecraft.block.state.IBlockState;
 import net.minecraft.client.Minecraft;
@@ -25,6 +26,7 @@ import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.BlockPos;
 import net.minecraft.util.EnumFacing;
 import net.minecraft.util.ITickable;
+import net.minecraft.world.IBlockAccess;
 import net.minecraft.world.World;
 import net.minecraftforge.client.model.ISmartBlockModel;
 import net.minecraftforge.client.model.ModelLoader;
@@ -52,6 +54,7 @@ public class ModelAnimationDebug
 
     public static String blockName = "test_animation_block";
     public static final PropertyDirection FACING = PropertyDirection.create("facing");
+    public static final PropertyBool STATIC = PropertyBool.create("static");;
 
     @SidedProxy(serverSide = "net.minecraftforge.debug.ModelAnimationDebug$CommonProxy", clientSide = "net.minecraftforge.debug.ModelAnimationDebug$ClientProxy")
     public static CommonProxy proxy;
@@ -71,12 +74,9 @@ public class ModelAnimationDebug
                 @Override
                 public ExtendedBlockState createBlockState()
                 {
-                    return new ExtendedBlockState(this, new IProperty[]{ FACING }, new IUnlistedProperty[]{ B3DFrameProperty.instance });
+                    return new ExtendedBlockState(this, new IProperty[]{ FACING, STATIC }, new IUnlistedProperty[]{ B3DFrameProperty.instance });
                 }
 
-                @Override
-                public int getRenderType() { return -1; }
-
                 @Override
                 public boolean isOpaqueCube() { return false; }
 
@@ -109,6 +109,11 @@ public class ModelAnimationDebug
                     return new Chest(state);
                 }
 
+                @Override
+                public IBlockState getActualState(IBlockState state, IBlockAccess world, BlockPos pos) {
+                    return state.withProperty(STATIC, true);
+                }
+
                 /*@Override
                 public IBlockState getExtendedState(IBlockState state, IBlockAccess world, BlockPos pos) {
                     TileEntity te = world.getTileEntity(pos);
@@ -239,7 +244,8 @@ public class ModelAnimationDebug
         public void renderTileEntityAt(Chest te, double x, double y, double z, float partialTick, int breakStage)
         {
             IBlockState state = te.getWorld().getBlockState(te.getPos());
-            IBakedModel model = this.blockRenderer.getModelFromBlockState(state, te.getWorld(), te.getPos());
+            state = state.withProperty(STATIC, false);
+            IBakedModel model = this.blockRenderer.getBlockModelShapes().getModelForState(state);
             if(state instanceof IExtendedBlockState)
             {
                 IExtendedBlockState exState = (IExtendedBlockState)state;

src/test/resources/assets/forgedebugmodelanimation/blockstates/test_animation_block.json

@@ -6,13 +6,20 @@
         },
         "model": "forgedebugmodelloaderregistry:chest.b3d",
         "custom": {
-            "mesh": ["Cube.001"]
+            "mesh": ["Base", "Lid"]
         }
      },
     "variants": {
         "normal": [{}],
         "inventory": [{
-            "transform": "forge:default-block"
+            "transform": {
+                "rotation": { "y": 180 },
+                "thirdperson": {
+                    "rotation": [ { "z": 170 }, { "y": -45 }, { "z": 20 } ],
+		            "translation": [ 0, 0.09375, -0.171875 ],
+		            "scale": 0.375
+                }
+            }
         }],
         "facing": {
             "down":  { "transform": { "rotation": { "x": 90  } } },
@@ -21,6 +28,18 @@
             "south": { "transform": "identity"                   },
             "west":  { "transform": { "rotation": { "y": 90  } } },
             "east":  { "transform": { "rotation": { "y": 270 } } }
+        },
+        "static": {
+            "true": {
+                "custom": {
+                    "mesh": ["Base"]
+                }
+            },
+            "false": {
+                "custom": {
+                    "mesh": ["Lid"]
+                }
+            }
         }
     }
 }

src/test/resources/assets/forgedebugmodelloaderregistry/blockstates/CustomModelBlock.json

@@ -6,7 +6,10 @@
             "#chest": "entity/chest/normal"
         },
         "model": "forgedebugmodelloaderregistry:chest.b3d",
-        "transform": "forge:default-block"
+        "transform": "forge:default-block",
+        "custom": {
+            "mesh": ["Base", "Lid"]
+        }
      },
     "variants": {
         "normal": [{}],