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# MeshMaker Frequently Asked Question

- Q: I started a new model using Mesh::startNewModel, and added vertices and faces, but they don't show up. Why?
  A: When you start a new model, you should also call Renderer::setAutoScale to make the model automatically rescale itself according to to the changes in the geometry.

- Q: Sometimes I call some MeshMaker functions from my code (for example, the pick functions), and the program seems to be stuck. Why is that?
  A: For some of the the API functions you need to be in a seperate thread from the main thread, otherwise there are synchronization problems. For your code it's preferable that you start a new thread, using startNewThread, and put your code in there. More details can be found in the MeshMaker Tutorial , under the section Step 5: Writing the function .

This software library was written by Roni Raab, ronir@cs.technion.ac.il.
Last updated on February 2003.
This software is for academic and research use only.