Integration GroIMP / OpenAlea: To communicate between GroIMP and OpenAlea, two solutions appears. The first solution is to communicate from OpenAlea to GroIMP through an http connection. 1. GroIMP is started as the server, 2. OpenAlea send the XL file to GroIMP + a graph if needed. 3. GroIMP start a project and compile the file 4. OA send commands to GroIMP for eecution 5. GroIMP returns the results as an XML file 6. OA parse the file and construct internal data structure: * scenegraph and MTG/Graph Geometric Objects: Box Sphere Cylinder Cone Transform TriangleSet FaceSet ElevationGrid Frustum NurbsPatch