One of the problems appearing in the virtual reality (VR) application is the image distortion and blending correction for curved screens with single or multiple projectors. There are ways to solve this problem via a special circuit implementation within the image projectors or via special image correction PC based boxes. In this study we proposed own algorithm for the image correction based on the back ray tracing approach. The algorithm is using reverse ray tracing and it was tested on the Cybersphere1 setup. We propose the software implementation of the algorithm which allows using it for any programs not limited by a certain technology such as OpenGL for instance as in other image correction algorithms. The algorithm can be used for distributed image rendering and projection such as Chromium based sets.
Virtual Reality (VR) is regarded as a high-end user-computer interface that involves real-time simulation and interactions through multiple sensorial channels. It is assumed that VR will reshape the interaction interfaces between user and computer technology by offering new approaches for the communication of information, the visualisation of processes and the creative expression of ideas. The VR application in construction has a relatively long history but its successful stories are not heard quite often.
In this paper, the authors have explored how much further the construction industry could be supported by new three dimensional (3D) VR technologies in different construction processes. The design information in the construction industry has been discussed first followed by a detail construction process analysis. A questionnaire survey has been conducted and the results of the survey are presented and discussed. As an investigation into the application of 3D VR technologies in the context of the construction processes, the benefits and challenges of current and potential applications of 3D VR in the construction industry have been identified. This study also reveals the strengths and weaknesses of 3D VR technology applications in the construction processes. Suggestions and future works are also provided in this paper.