get mesh positions in ofxassimploader

Hi,

I've mentioned that Assimp model loader doesn't have positions of meshes. I've seen that the data is available in the Assimp library, but not interpreted in the addon.

I've allready made a start, but couldn't get the positions right.

 //-------------------------------------------
 ofPoint ofxAssimpModelLoader::getMeshPosition(int num){
ofPoint pos;
if((int)scene->mNumMeshes<=num){
    ofLogError("ofxAssimpModelLoader") << "getMesh(): mesh id " << num
    << " out of range for total num meshes: " << scene->mNumMeshes;
    return pos;
}

aiVector3D* verticles = scene->mMeshes[num]->mVertices;

ofPoint pt = ofPoint(verticles->x*normalizedScale,
                     verticles->y*normalizedScale ,
                     verticles->z*normalizedScale );

pt.rotate(-90, ofVec3f(1,0,0));
return pt;

}

Start by reading ofxAssimpModelLoader::getMeshPosition in the Assimp addon and the surrounding mesh-loading code. Check how Assimp exposes mesh data and how normalizedScale and rotation are applied elsewhere. Done means the getter returns the correct position for a requested mesh and handles invalid mesh indices consistently.