From 5321e1036deed6a87440c8fd84270a97967e6710 Mon Sep 17 00:00:00 2001
From: Eddie James <ea_james@live.com>
Date: Sat, 4 Aug 2018 16:36:04 -0500
Subject: [PATCH] Fix .obj displacement texture parsing

The string for an opacity texture is a substring of the displacement
texture string. Due to the nature of the string comparison in the
material texture parsing, any displacement textures will be incorrectly
assigned as opacity textures. Fix this by simply performing the check
for displacement texture before checking for opacity texture.
---
 code/ObjFileMtlImporter.cpp | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/code/ObjFileMtlImporter.cpp b/code/ObjFileMtlImporter.cpp
index 711740353..16bde1b43 100644
--- a/code/ObjFileMtlImporter.cpp
+++ b/code/ObjFileMtlImporter.cpp
@@ -332,6 +332,11 @@ void ObjFileMtlImporter::getTexture() {
         // Specular texture
         out = & m_pModel->m_pCurrentMaterial->textureSpecular;
         clampIndex = ObjFile::Material::TextureSpecularType;
+    } else if ( !ASSIMP_strincmp( pPtr, DisplacementTexture1.c_str(), static_cast<unsigned int>(DisplacementTexture1.size()) ) ||
+                !ASSIMP_strincmp( pPtr, DisplacementTexture2.c_str(), static_cast<unsigned int>(DisplacementTexture2.size()) ) ) {
+        // Displacement texture
+        out = &m_pModel->m_pCurrentMaterial->textureDisp;
+        clampIndex = ObjFile::Material::TextureDispType;
     } else if ( !ASSIMP_strincmp( pPtr, OpacityTexture.c_str(), static_cast<unsigned int>(OpacityTexture.size()) ) ) {
         // Opacity texture
         out = & m_pModel->m_pCurrentMaterial->textureOpacity;
@@ -354,11 +359,6 @@ void ObjFileMtlImporter::getTexture() {
         // Reflection texture(s)
         //Do nothing here
         return;
-    } else if ( !ASSIMP_strincmp( pPtr, DisplacementTexture1.c_str(), static_cast<unsigned int>(DisplacementTexture1.size()) ) ||
-                !ASSIMP_strincmp( pPtr, DisplacementTexture2.c_str(), static_cast<unsigned int>(DisplacementTexture2.size()) ) ) {
-        // Displacement texture
-        out = &m_pModel->m_pCurrentMaterial->textureDisp;
-        clampIndex = ObjFile::Material::TextureDispType;
     } else if ( !ASSIMP_strincmp( pPtr, SpecularityTexture.c_str(), static_cast<unsigned int>(SpecularityTexture.size()) ) ) {
         // Specularity scaling (glossiness)
         out = & m_pModel->m_pCurrentMaterial->textureSpecularity;