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Algorithm

Direct Sun Hours

Definition

Direct Sun Hours (DSH) define the average duration of uninterrupted sunlight hitting the first floor of the courtyard facade measured over a year.

Ranking

Hektar features Direct Sun Hours for parcel typologies as a generative driver. Applied to our extensive architectural library it is possible to answer various “what if” scenarios for an informed design process. Please note that the ranking strategy is approximative. It is meant as a generative driver and is not conclusive. I.e., it guide design and do not constitute any verification. Scores per typology and ranking metric are normalized between 0 and 1

Ray-tracing points: Illustrations in plan
Ray-tracing points: Examples in section

Control points

The edges used for control points are the inner edges of the parcel.

Ray-tracing

Direct Sun Hours is collected annually for all individual control points. Influenced by context and azimuth (project coordinate). The optimization maximizes the total gain in each generated parcel.

Influenced by Azimuth
Influenced by Context
This article was last updated:
January 9, 2026