From 6fa851ec4b9bd9a0114a47516c2051b2118241b2 Mon Sep 17 00:00:00 2001
From: Abe Pazos <abe@hamoid.com>
Date: Thu, 30 Jan 2025 21:27:56 +0100
Subject: [PATCH] [orx-obj-loader] skip padding when saving obj

---
 orx-obj-loader/src/jvmMain/kotlin/OBJSaver.kt | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/orx-obj-loader/src/jvmMain/kotlin/OBJSaver.kt b/orx-obj-loader/src/jvmMain/kotlin/OBJSaver.kt
index 4597b6429..3a374138c 100644
--- a/orx-obj-loader/src/jvmMain/kotlin/OBJSaver.kt
+++ b/orx-obj-loader/src/jvmMain/kotlin/OBJSaver.kt
@@ -62,13 +62,18 @@ fun VertexBuffer.saveOBJ(filePath: String) {
     // Process the ByteBuffer and populate data structures
     while (bb.position() < bb.capacity()) {
         vertexFormat.items.forEach { vertexElement ->
-            val floats = List(vertexElement.type.componentCount) {
+            val componentCount = vertexElement.type.componentCount
+            val floats = List(componentCount) {
                 bb.getFloat()
             }.joinToString(" ")
             val token = tokens[vertexElement.attribute]
             if (token != null) {
                 lastIndices[token] = indexMap[token]!!.add(floats)
             }
+            // Skip padding
+            repeat(4 - componentCount) {
+                bb.getFloat()
+            }
         }
         vertexIndices.add("${lastIndices["v"]}/${lastIndices["vt"]}/${lastIndices["vn"]}")
     }
@@ -84,8 +89,8 @@ fun VertexBuffer.saveOBJ(filePath: String) {
             // Write v, vt, vn blocks
             indexMap.forEach { (token, verts) ->
                 appendLine(verts.toObjBlock(token))
-
             }
+
             // Write faces processing three vertices at a time
             vertexIndices.chunked(3) {
                 appendLine("f ${it[0]} ${it[1]} ${it[2]}")