Finally, this implementation also takes into consideration how including or excluding more detailed facade objects such as balconies and balcony railings affects daylight access (i.e., total hours of direct sunlight per grid point on March 21st). The process depicted in this workflow computes the Direct Sun Hour values calculated for March 21st (0.5 min temporal resolution) over a grid of points (0.1m resolution) placed over every window in the target buildings (see figure in Input data section). An installed version of Rhino 7 with the following tools:.

The next figures give you the opportunity to get a closer look over the target buildings. The windows of the target buildings for which we are going to compute the direct sun hours for, are highlighted in yellow. The below figure depicts a example of a 3D city model that can be used as input. windows, balconies, balcony railings, etc.

3D city model including detailed building exterior information (equivalent to CityGML LOD4) like e.g.

Sunlight exposure is regulated by the Swedish Standard, which is based on the European Standard EN 17037 - Daylight in Buildings, and states that at minimum one room in an apartment has to receive at least 1.5 hours of direct sunlight on one day between February 1st and March 21st of a year. balconies, balcony railings, etc.) of buildings represented in a high level of detail affect the results of daylight metric simulations such as the Sunlight Exposure (here expressed as direct sun hours). The goal is to examine how including or excluding obstructing gemmetries (e.g.

Some of the buildings in the study area are represented in high level of detail (equivalent to CityGML LOD4), while others are represented in a lower level of detail (equivalent to CityGML LOD2). The Grasshopper script-file included in this repository is used for computing the direct sun hours on windows and balcony doors of a set of buildings in a neighbourhood.

Download grasshopper for rhino 6