The first 120 ms of a crash are simulated and the results are saved in ca. 60 timesteps. According to the development status of the automotiveproject the vehicle geometry is mapped to 300.000 till over 500.000 finite elements. With preceding development of the hard- and software the demands for the accuracy of the modell and so the number of finite elements is constantly rising.
To be able to visualize this amount of data an efficient scenegraph-design has been developed in a first step making use of the invariant topology of the crashnets because it only saves it once in the scenegraph.
Under Open Inventor, as a result of the scenegraph semantics, the coordinates may be selected at each case for a complete timestep in the left part of the scenegraph using a switch, whereas the topology would be represented once by the shape nodes.
The scenegraph semantics at Cosmo3D differs from that at Open Inventor inasmuch as transformations and modifications of attributes are passed only downwards, not to the right. So each component is represented by its own shape node in every timestep. This associates the attributes of display of the component with a description of geometry who is sharing the same topology with all timesteps and the coordinates with all geometries.
Further the coordinates object for gouraud-shaded surfaces have been defined to enable the reference of the coordinates as well as the normals using an index-set.
