fix vertex writer endVertex

common/src/lib/java/dev/engine_room/flywheel/lib/model/part/VertexWriter.java

@@ -42,7 +42,8 @@ public VertexConsumer addVertex(float x, float y, float z) {
 			MemoryUtil.memPutFloat(ptr + 8, z);
 			filledPosition = true;
 		}
-		return this;
+
+		return this.endVertex();
 	}
 
 	@Override
@@ -93,6 +94,25 @@ public VertexConsumer setNormal(float x, float y, float z) {
 		return this;
 	}
 
+	public VertexConsumer endVertex() {
+		if ((!filledPosition || !filledTexture || !filledNormal) && vertexCount != 0) {
+			throw new IllegalStateException("Not filled all elements of the vertex");
+		}
+
+		filledPosition = false;
+		filledTexture = false;
+		filledNormal = false;
+		vertexCount++;
+
+		long byteSize = (vertexCount + 1) * STRIDE;
+		long capacity = data.size();
+		if (byteSize > capacity) {
+			data = data.realloc(capacity * 2);
+		}
+
+		return this;
+	}
+
 	private long vertexPtr() {
 		return data.ptr() + vertexCount * STRIDE;
 	}