[mesh] Material: Fix getAllTextures() signature

The previous signature break `exportUSD` software

Author: gregoire-dl

src/aliceVision/mesh/Material.cpp

@@ -93,14 +93,17 @@ const StaticVector<std::string>& Material::getTextures(TextureType type) const
     }
 }
 
-void Material::getAllTexturePaths(std::vector<std::string>& texturePaths) const
+std::vector<std::string> Material::getAllTextures() const
 {
+    std::vector<std::string> texturePaths;
     texturePaths.resize(_bumpTextures.size() + _diffuseTextures.size() + _displacementTextures.size() + _normalTextures.size());
 
     auto last = std::copy(_bumpTextures.begin(), _bumpTextures.end(), texturePaths.begin());
     last = std::copy(_diffuseTextures.begin(), _diffuseTextures.end(), last);
     last = std::copy(_displacementTextures.begin(), _displacementTextures.end(), last);
     std::copy(_normalTextures.begin(), _normalTextures.end(), last);
+
+    return texturePaths;
 }
 
 bool Material::hasTextures(TextureType type) const

src/aliceVision/mesh/Material.hpp

@@ -55,7 +55,7 @@ class Material
     const StaticVector<std::string>& getTextures(TextureType type) const;
 
     /// Get all texture paths used in the material
-    void getAllTexturePaths(std::vector<std::string>& texturePaths) const;
+    std::vector<std::string> getAllTextures() const;
 
     /// Check if material has textures of a given type
     bool hasTextures(TextureType type) const;

src/software/convert/main_convertMesh.cpp

@@ -135,10 +135,7 @@ int aliceVision_main(int argc, char** argv)
             outType == mesh::EFileType::GLTF || 
             outType == mesh::EFileType::GLB)
         {
-            std::vector<std::string> texturePaths;
-            texturing.material.getAllTexturePaths(texturePaths);
-
-            for (const auto& texturePath : texturePaths)
+            for (const auto& texturePath : texturing.material.getAllTextures())
             {
                 ALICEVISION_LOG_DEBUG("Copying texture file: " << texturePath);