ofxAssimp::Scene import setting for applying mesh transform. (#8461)

#changelog #ofxAssimp

Author: NickHardeman

addons/ofxAssimp/src/Source/ofxAssimpSrcScene.h

@@ -42,6 +42,7 @@ struct ImportSettings {
 //	bool importLights = false;
 	bool convertToLeftHanded = true; // aiProcess_ConvertToLeftHanded
 	bool transformRootNode = true; // orient based on src scene root node, helps with correct orientation
+	bool applyTransformsToMeshesWithoutBones = false; // apply offset transforms to meshes without bones. 
 	std::vector<std::string> excludeNodesContainingStrings;
 	unsigned int aiFlags = 0; // ai process flags, ie. aiProcess_FixInfacingNormals
 };

addons/ofxAssimp/src/ofxAssimpMesh.cpp

@@ -103,13 +103,13 @@ std::size_t Mesh::getNumIndices() {
 }
 
 //-------------------------------------------
-void Mesh::setSrcMesh( std::shared_ptr<ofxAssimp::SrcMesh> aSrcMesh ) {
+void Mesh::setSrcMesh( std::shared_ptr<ofxAssimp::SrcMesh> aSrcMesh, bool bApplyTransform ) {
 	mSrcMesh = aSrcMesh;
 
 	// if we have bones, no offset, since we are controlled by the bones //
-//	if( mSrcMesh->getAiMesh() && mSrcMesh->getAiMesh()->mNumBones < 1 ) {
-//		setOfNodeFromAiMatrix(mSrcMesh->getAiNode()->mTransformation, this );
-//	}
+	if( bApplyTransform && mSrcMesh->getAiMesh() && mSrcMesh->getAiMesh()->mNumBones < 1 ) {
+		ofxAssimp::Utils::setOfNodeFromAiMatrix(mSrcMesh->getAiNode()->mTransformation, this );
+	}
 
 	if( mSrcMesh ) {
 		material = mSrcMesh->material;

addons/ofxAssimp/src/ofxAssimpMesh.h

@@ -38,7 +38,7 @@ class Mesh : public ofxAssimp::Node {
 	aiMesh* getAiMesh();
 	std::size_t getNumIndices();
 
-	void setSrcMesh( std::shared_ptr<ofxAssimp::SrcMesh> aSrcMesh );
+	void setSrcMesh( std::shared_ptr<ofxAssimp::SrcMesh> aSrcMesh, bool bApplyTransform );
 
 	ofMesh& getStaticMesh();
 	ofMesh& getMesh();

addons/ofxAssimp/src/ofxAssimpScene.cpp

@@ -166,7 +166,7 @@ void Scene::processSceneNodesRecursive( std::shared_ptr<ofxAssimp::SrcNode> aSrc
 	if( nodeType == ofxAssimp::NodeType::OFX_ASSIMP_MESH ) {
 		auto tmesh = make_shared<ofxAssimp::Mesh>();
 		auto srcMesh = std::dynamic_pointer_cast<ofxAssimp::SrcMesh>(aSrcNode);
-		tmesh->setSrcMesh( srcMesh );
+		tmesh->setSrcMesh( srcMesh, mSrcScene->getImportSettings().applyTransformsToMeshesWithoutBones );
 		mMeshes.push_back(tmesh);
 		newNode = tmesh;
 	} else if( nodeType == ofxAssimp::NodeType::OFX_ASSIMP_BONE ) {