SolarPosition
From K-3D
Description
| Calculates the position of the Sun based on observer position, date, and time. |
| Plugin Status: | Experimental |
| Categories: | All Plugins, Experimental Plugins, Simulation Plugins |
Metadata
| Name | Value |
|---|
Properties
| Label | Description | Type | Script Name |
|---|---|---|---|
| Latitude | Observer latitude (decimal degrees). | k3d::double_t | latitude |
| Longitude | Observer longitude (decimal degrees). | k3d::double_t | longitude |
| Time | Time since 1970-1-1, in seconds. | k3d::double_t | time |
| Time Zone Offset | Time zone offset in minutes, [-720, +720]. Note that you must adjust the timezone manually to account for daylight savings time. | k3d::int32_t | time_zone_offset |
| North | Specifies which direction will be treated as 'North'. | k3d::vector3 | north |
| East | Specifies which direction will be treated as 'East'. | k3d::vector3 | east |
| Up | Specifies which direction will be treated as 'up'. | k3d::vector3 | up |
| Solar Position | Solar position. | k3d::vector3 | position |
Notes
- SolarPosition computes the position of the Sun for an observer with given latitude, longitude, and time, producing a 3D vector that can be interpreted as pointing "from" the origin "to" the Sun. This position vector is suitable for use as an input with the IndigoSkylight, LuxRenderSkyLight and LuxRenderSunLight plugins.
- To compute the solar position for a specific date and time, use ManualTimeSource.
- Note that K-3D times are all UTC times, so you must set the correct observer "Time Zone Offset" for accurate results.
- The "North", "East", and "Up" vectors provide a sensible default mapping to K-3D's XYZ coordinates. If modified, these three vectors must be orthogonal to produce accurate results.
- SolarPosition is based on the SOLPOS 2.0 codes developed by the National Renewable Energy Laboratory, http://www.nrel.gov
