Abstract
Abstract. Schwarzenburg Castle is one of the few Alsatian castles that can be dated with precision. The Schwarzenbourg family, taking advantage of a favourable historical and political context, built the castle in 1261 on the municipal boundary of the town of Munster. Initially intended for residential use, the castle passed through the centuries from family to family, and shortly becoming a ruin. The first major renovation was realized in the 15th century, but for military purposes rather than for housing. This was the only one, as the castle was quickly abandoned at the end of the same century. It was only during the First World War that the castle was used by the German army, which built a bunker in the upper courtyard. Schwarzenbourg castle is, therefore, an original in Alsace, both in terms of its history and its characteristics, which have no regional equal. The objective of this modelling project is twofold. On the one hand, to model the current state of the castle, i.e., an advanced state of ruin for certain elements, and, on the other hand, to model the reconstruction of the castle as it was when it was built in 1261. This double objective comes up against several problems, mainly technical. Indeed, how to move from a point cloud of a certain density and quality to a surface model allowing a realistic rendering? How to limit the influence of the noise on the quality of the surface model? How to remain faithful to the cloud while simplifying the geometric primitives to make the rendering more efficient? Or what technique should be used to reconstitute the castle as it was when it was built? The objective here was to realize the transformation from a consolidated and geo-referenced point cloud to a surface model allowing for a photo-realistic rendering.
Highlights
1.1 Historical contextSchwarzenburg Castle, or called Schwarzenberg Castle, is one of the few castles that can be accurately dated (Biller and Metz, 1995)
In 1271 Walter von Geroldseck renounced the castle in exchange for a payment and, at same time, the abbey of Munster became part of the Bishopric of Basel
In 1800, the castle was sold as national property to a private owner in Munster and the German army built a bunker there during the First World War, which is still visible today
Summary
Schwarzenburg Castle, or called Schwarzenberg Castle, is one of the few castles that can be accurately dated (Biller and Metz, 1995). The castle was mortgaged many times and slowly began to fall into ruin It was not until 1401 that the Beger de Geispolsheim family recovered the property in exchange for a restoration (Biller and Metz, 1995). The castle was modernized by Jacob Beger at the end of the XVth century It fell into ruin again at the beginning of the Modern Era and lost all its interest and military value, as it was declared uninhabitable in 1646 (Biller and Metz, 1995). 1.2 Current status All preserved parts of the castle were built exclusively with clear granite found on the hill These stones remained raw and were not cut, which complicated the distinction of the different phases of construction. We had to deal with complex surfaces for our castle, which were more difficult to model than simple surfaces
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