Abstract: A CAD model comprises multiple entities. Each entity comprises one or more subentities, wherein a subentity is a vertex, an edge or a face. From the CAD model a group of multiple entities comprising an identical geometry is obtained. This step comprises verifying whether the entities of a pair of entities comprise an identical geometry via sequentially verifying identity conditions of a sequence of multiple identity conditions, until either an identity condition of the sequence fails or all identity conditions of the sequence are verified. Each identity condition is based on the subentities of the pair of entities. A block definition comprising a block geometry based on said identical geometry is created. In the CAD model, the entities of the group are replaced with block references comprising a pointer to the block definition. The CAD model is thereby compressed.

Abstract: The present invention concerns a computer-implemented method, a computer system and a computer program product for direct room modeling in a CAD model. The CAD model comprises a rectangular coordinate system comprising mutually orthogonal height, first horizontal and second horizontal directions. A first position and subsequently a second position within the model are obtained via a user input device. The first and second positions define a rectangle perpendicular to the height direction and aligned with the horizontal directions. The rectangle comprises edges and corners. The rectangle comprises the first and second positions at diagonally opposite corners. A room drawing operation is automatically performed based on the rectangle. One or more walls and/or wall portions, each extending in the height direction and along an edge of the rectangle over in essence the full length of the edge, are thereby inserted or removed.

Abstract: The present invention concerns a computer-implemented method, a computer system and a computer program product for direct room modeling in a CAD model. The CAD model comprises a rectangular coordinate system comprising mutually orthogonal height, first horizontal and second horizontal directions. A first position and subsequently a second position within the model are obtained via a user input device. The first and second positions define a rectangle perpendicular to the height direction and aligned with the horizontal directions. The rectangle comprises edges and corners. The rectangle comprises the first and second positions at diagonally opposite corners. A room drawing operation is automatically performed based on the rectangle. One or more walls and/or wall portions, each extending in the height direction and along an edge of the rectangle over in essence the full length of the edge, are thereby inserted or removed.