Package org.h2gis.functions.spatial.earth

Class ST_GeometryShadow

java.lang.Object
org.h2gis.api.AbstractFunction
org.h2gis.api.DeterministicScalarFunction
org.h2gis.functions.spatial.earth.ST_GeometryShadow
All Implemented Interfaces:
org.h2gis.api.Function, org.h2gis.api.ScalarFunction
public class ST_GeometryShadow extends org.h2gis.api.DeterministicScalarFunction
Compute the shadow footprint for a single geometry. The shadow is represented as an unified polygon. The user must specified the sun position : azimuth and altitude and a height to compute the shadow footprint.
Author:
Erwan Bocher

  • Field Summary

    Fields inherited from interface org.h2gis.api.Function

    PROP_NAME, PROP_REMARKS

    Fields inherited from interface org.h2gis.api.ScalarFunction

    PROP_DETERMINISTIC

  • Constructor Summary

    Constructors
    Constructor
    Description
    ST_GeometryShadow()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static org.locationtech.jts.geom.Geometry
    computeShadow(org.locationtech.jts.geom.Geometry geometry, double azimuth, double altitude, double height)
    Compute the shadow footprint based on
    static org.locationtech.jts.geom.Geometry
    computeShadow(org.locationtech.jts.geom.Geometry geometry, double azimuth, double altitude, double height, boolean doUnion)
    Compute the shadow footprint based on
    static org.locationtech.jts.geom.Geometry
    computeShadow(org.locationtech.jts.geom.Geometry geometry, org.locationtech.jts.geom.Geometry sunPosition, double height)
    Compute the shadow footprint based on
    String
    getJavaStaticMethod()
     
    static double[]
    shadowOffset(double azimuth, double altitude, double height)
    Return the shadow offset in X and Y directions

    Methods inherited from class org.h2gis.api.AbstractFunction

    addProperty, getProperty, removeProperty

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    Methods inherited from interface org.h2gis.api.Function

    getProperty

  • Constructor Details

    • ST_GeometryShadow

      public ST_GeometryShadow()

  • Method Details

    • getJavaStaticMethod

      public String getJavaStaticMethod()

    • computeShadow

      public static org.locationtech.jts.geom.Geometry computeShadow(org.locationtech.jts.geom.Geometry geometry, org.locationtech.jts.geom.Geometry sunPosition, double height)
      Compute the shadow footprint based on
      Parameters:
      geometry - input geometry
      sunPosition - as a point where x = azimuth and y=altitude
      height - of the geometry
      Returns:

    • computeShadow

      public static org.locationtech.jts.geom.Geometry computeShadow(org.locationtech.jts.geom.Geometry geometry, double azimuth, double altitude, double height)
      Compute the shadow footprint based on
      Parameters:
      geometry - input geometry
      azimuth - of the sun in radians
      altitude - of the sun in radians
      height - of the geometry
      Returns:

    • computeShadow

      public static org.locationtech.jts.geom.Geometry computeShadow(org.locationtech.jts.geom.Geometry geometry, double azimuth, double altitude, double height, boolean doUnion)
      Compute the shadow footprint based on
      Parameters:
      geometry - input geometry
      azimuth - of the sun in radians
      altitude - of the sun in radians
      height - of the geometry
      doUnion - unified or not the polygon shadows
      Returns:

    • shadowOffset

      public static double[] shadowOffset(double azimuth, double altitude, double height)
      Return the shadow offset in X and Y directions
      Parameters:
      azimuth - in radians from north.
      altitude - in radians from east.
      height - of the geometry
      Returns: