Real‐Time Solar Exposure Simulation in Complex Cities. (4th May 2017)

• Record Type: Journal Article
• Authors: Muñoz‐Pandiella, I.; Bosch, C.; Mérillou, N.; Pueyo, X.; Mérillou, S.
• Is Part Of: Computer graphics forum. Volume 36:Number 8(2017)
• Page Start: 554
• Page End: 566
• Publication Date: 2017-05-04
• Subjects: illumination rendering -- rendering -- real‐time rendering -- rendering -- visibility determination -- rendering -- I.3.3.b [Computer Graphics]: Picture/Image Generation—Bitmap and framebuffer operations -- I.3.7.b [Computer Graphics]: Three‐Dimensional Graphics and Realism—Colour, shading, shadowing and texture; Computer graphics -- Periodicals; 006.605
• DOI: 10.1111/cgf.13152
• Languages: English
• ISSNs: 0167-7055

Abstract

Abstract: In urban design, estimating solar exposure on complex city models is crucial but existing solutions typically focus on simplified building models and are too demanding in terms of memory and computational time. In this paper, we propose an interactive technique that estimates solar exposure on detailed urban scenes. Given a directional exposure map computed over a given time period, we estimate the sky visibility factor that serves to evaluate the final exposure at each visible point. This is done using a screen‐space method based on a two‐scale approach, which is geometry independent and has low storage costs. Our method performs at interactive rates and is designer‐oriented. The proposed technique is relevant in architecture and sustainable building design as it provides tools to estimate the energy performance of buildings as well as weathering effects in urban environments. Abstract : In urban design, estimating solar exposure on complex city models is crucial but existing solutions typically focus on simplified building models and are too demanding in terms of memory and computational time. In this paper, we propose an interactive technique that estimates solar exposure on detailed urban scenes. Given a directional exposure map computed over a given time period, we estimate the sky visibility factor that serves to evaluate the final exposure at each visible point. This is done using a screen‐space method based on a two‐scale approach, which is geometry independent and has low storage costs.