Real‐Time Solar Exposure Simulation in Complex Cities

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 detai...

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Bibliographic Details
Published in:Computer graphics forum Vol. 36; no. 8; pp. 554 - 566
Main Authors: Muñoz‐Pandiella, I., Bosch, C., Mérillou, N., Pueyo, X., Mérillou, S.
Format: Journal Article
Language:English
Published: Oxford Blackwell Publishing Ltd 01.12.2017
Wiley
Subjects:
Building design
Computer graphics
Computer memory
Computer Science
Computer simulation
Design
Energia solar
Exposure
Graphics
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
illumination rendering
Infografia
real‐time rendering
rendering
Solar energy
Urban environments
Urban planning
Visibility
visibility determination
Weathering
ISSN:0167-7055, 1467-8659
Online Access:Get full text
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Summary: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. 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.
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ISSN:0167-7055
1467-8659
DOI:10.1111/cgf.13152