From e6a8d1bbf733c26acd4839bb6db1571481be9175 Mon Sep 17 00:00:00 2001
From: SiboVG <sibo.vangool@hotmail.com>
Date: Mon, 21 Aug 2023 03:44:19 +0200
Subject: [PATCH] Fix origin offsets

---
 .../file/wavefrontobj/export/AppearanceExporter.java        | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/core/src/net/sf/openrocket/file/wavefrontobj/export/AppearanceExporter.java b/core/src/net/sf/openrocket/file/wavefrontobj/export/AppearanceExporter.java
index 5e8236c6b..f5c3453df 100644
--- a/core/src/net/sf/openrocket/file/wavefrontobj/export/AppearanceExporter.java
+++ b/core/src/net/sf/openrocket/file/wavefrontobj/export/AppearanceExporter.java
@@ -109,9 +109,11 @@ public class AppearanceExporter {
         textureOptions.setS(scaleX, scaleY, 1f);
 
         // Texture offset
+        // Need an extra offset because the texture scale origin is different in OR
         final Coordinate origin = texture.getOffset();
-        float origX = (float) origin.x;
-        float origY = (float) (origin.y - 1 - 1/scaleY);       // Need an extra offset because the texture scale origin is different in OR
+        float origX = (float) (scaleX*(-1 - origin.x) + 1);
+        float origY = (float) (scaleY*(-1 - origin.y) + 1);
+
         textureOptions.setO(origX, origY, 0f);
 
         // Texture rotation is not possible in MTL...