From fefdf096e7ff91354a0526082ce04b2201a2a7c2 Mon Sep 17 00:00:00 2001
From: MihailRis <mexaruc@gmail.com>
Date: Sun, 6 Sep 2026 19:42:14 +0300
Subject: [PATCH] add 'normal' vector attribute to 'tri' in vcm

---
 src/coders/vcm.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/coders/vcm.cpp b/src/coders/vcm.cpp
index bf9a152a6..42a503477 100644
--- a/src/coders/vcm.cpp
+++ b/src/coders/vcm.cpp
@@ -223,7 +223,12 @@ static void perform_triangle(const xmlelement& root, ModelBuilder& builder) {
 
     glm::vec3 ba = pointB - pointA;
     glm::vec3 ca = pointC - pointA;
-    glm::vec3 normal = glm::normalize(glm::cross(ba, ca));
+    glm::vec3 normal;
+    if (root.has("normal")) {
+        normal = root.attr("normal").asVec3();
+    } else {
+        normal = glm::normalize(glm::cross(ba, ca));
+    }
     
     if (root.has("uv")) {
         root.attr("uv").asNumbers(glm::value_ptr(uvs[0]), 6);