Robin Please reread my post you have to set the definition's is2d= AND its snapto=... and then the instance's glue_to= ... If you are loading a premade component ten why not give that the correct behaviors so you needed worry about reinventing them each time? and then you just need to place the component onto the face and tell it to glue_to it! You should add the instance with a transformation, OR Geom::Transformation.new() and then later transform it so that it's located on the face to which you want to glue it - it's z-axis needs to be parallel to the face.normal and it's origin somewhere on the face... It will not magically 'jump' onto the face - you need to code that. There after it will stick onto the face's plane like any other glued component, and move with the face too...

mit sowas bist du im Developers Forum bestimmt besser aufgehoben. Norbert

Unter dem folgenden Link findest du ein Beispiel aus unserer Anwendung. Der Programmstand wird von uns Ende Oktober veröffentlicht. http://youtu.be/zy9RVZH1Pro

thanks Thomthom for your quick answer! yeah I've got some information. Actually it's a scaffold which should be multiplied by scaling it on houses storefronts. These multiplied scaffolds should contain some attributes like "time to build","costs" or "weight". The next step in this project would be to export this model in a kind of "model-view"-program with a ruby interface. I hope this is enough information at that point.