I am developing a PV3D application that imports DAE models exported by Blender's Collada Exporter plugin (1.4). When I build them in Blender, I use exact dimensions (the end-game is to have scale models in PV3D).
Using the same scale of dimensions, some models appear in PV3D extremely tiny, while others are the appropriate size. Many appear with rotations bearing no resemblance to how they were constructed in Blender. Also, I have to flip the normals in Blender in order to get them to display properly in PV3D, and even then, occasional triangles will appear in PV3D with normals still reversed. I can't seem to discern a pattern amongst which models appear tiny. Same goes for the randomly flipping normals - I there doesn't seem to be a pattern to it.
Has anyone had any experience with a problem like this? I can't even think of how to tackle it - the symptoms seem to point to something with the way PV3D handles the import, or how Blender handles the export, and the 3D math is way beyond me.