SU.1119 Environmental analysis: shade studies, daylight, PV yield, wind and outdoor comfort on the site and the building

Asked (#1119, Oct 29): what Autodesk Forma and ClimateStudio give: solar angles, shade studies, interior daylight, PV analysis, wind studies, thermal comfort, auto-generated site information.

Already built: sun hours and massing (LC.1), daylight, sun and grid (LC.20), EnergyPlus wasm (0.8). Missing: shade-study images and animations on the site, PV yield on roofs and facades, outdoor comfort (UTCI) from weather files, and wind (the hard one: needs a validated solver, never invented). Candidate: owner chooses.

**Implementation started 2026-11-02** (0.9 pick #14, third five, hardest first; session `env-analysis-09`, log docs/0.9-sessions/env-analysis-09.md). Status moves to Partly built or Built only when the code is reachable and tested (rule 49).

**2026-11-02 (env-analysis-09):** built in the shared library lib/envir (solar position tested against NREL SPA and Meeus, shade study with sun/shade-hours maps, shaded-area series and an animation, PV yield on roofs and walls from an EPW file with the model written out, UTCI from the published polynomial, 78 + 17 tests). Wind is not built: it needs a validated solver, and the validation list is in the log. Reachable once the one mount line lands in CivilCraft's massing-ui.js.