From 2eb9dca7827cd91b696a95a309a49086b52bba07 Mon Sep 17 00:00:00 2001
From: Erik Biederstadt <biederstadterik@gmail.com>
Date: Sun, 16 May 2021 15:48:23 -0600
Subject: [PATCH] GLTeapot: Add support for loading OBJ files containing extra
 information

If the OBJ loader encounters a file with vertex normals or texture
coordinates then it will no longer crash.
---
 Userland/Demos/GLTeapot/WavefrontOBJLoader.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Userland/Demos/GLTeapot/WavefrontOBJLoader.cpp b/Userland/Demos/GLTeapot/WavefrontOBJLoader.cpp
index 81412c82f2..08fa574447 100644
--- a/Userland/Demos/GLTeapot/WavefrontOBJLoader.cpp
+++ b/Userland/Demos/GLTeapot/WavefrontOBJLoader.cpp
@@ -24,6 +24,11 @@ RefPtr<Mesh> WavefrontOBJLoader::load(const String& fname)
     for (auto line = obj_file_or_error.value()->line_begin(); !line.at_end(); ++line) {
         auto object_line = *line;
 
+        // FIXME: Parse texture coordinates and vertex normals
+        if (object_line.starts_with("vt") || object_line.starts_with("vn")) {
+            continue;
+        }
+
         // This line describes a vertex (a position in 3D space)
         if (object_line.starts_with("v")) {
             auto vertex_line = object_line.split_view(' ');
@@ -45,6 +50,12 @@ RefPtr<Mesh> WavefrontOBJLoader::load(const String& fname)
                 return nullptr;
             }
 
+            if (object_line.contains("/")) {
+                for (int i = 1; i <= 3; ++i) {
+                    face_line.at(i) = face_line.at(i).split_view("/").at(0);
+                }
+            }
+
             // Create a new triangle
             triangles.append(
                 {