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com.supermap.realspace

Class LookAt

  • java.lang.Object
    • com.supermap.realspace.LookAt

  • public class LookAt
extends java.lang.Object
    The camera class LookAt

    This class is for determining the position of scene according to the position of the observation, the direction angle, the angle of pitch and the distance from the camera to the observation.

    • Constructor Summary

      Constructors 
      Constructor and Description
      LookAt(double longitude, double latitude, double range)
      Constructs a new LookAt object based on the longitude and latitude of the specified viewpoint and the distance from the specified camera.
      LookAt(double longitude, double latitude, double range, AltitudeMode mode)
      Constructs a new LookAt object based on the longitude and latitude of the specified viewpoint and the distance from the specified camera.
      LookAt(double longitude, double latitude, double altitude, AltitudeMode mode, double tilt, double heading, double range)
      Constructs a new LookAt object based on the longitude, latitude, angle of pitch, azimuth angle, distance and altitude mode of the specified viewpoint.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method and Description
      boolean equals(LookAt lookAt)
      Determines whether the two camera are the same
      double getAltitude()
      Gets the altitude of the viewpoint
      AltitudeMode getAltitudeMode()
      Gets the altitude mode of the viewpoint
      double getHeading()
      Gets the azimuth of the viewpoint that is the angle between the north and the point in the clockwise direction which ranges from 0 to 360 degree
      double getLatitude()
      Gets the latitude of the viewpoint.
      double getLongitude()
      Gets the longitude of the viewpoint relative to the prime meridian in degree.
      double getRange()
      Gets the distance between the camera and the viewpoint.
      double getTilt()
      Gets the angle between LookAt position and the surface normal which ranges from 0 to 90 degree.
      boolean isValid()
      Determines whether it is visible
      void setAltitude(double atitude)
      Sets the altitude of the viewpoint
      void setAltitudeMode(AltitudeMode mode)
      Sets the altitude mode of the viewpoint.
      void setHeading(double heading)
      Sets the azimuth of the viewpoint that is the angle between the north and the point in the clockwise direction which ranges from 0 to 360 degree
      void setLatitude(double latitude)
      Sets the latitude of the viewpoint.
      void setLongtitude(double longtitude)
      Sets the latitude of the viewpoint relative to the prime meridian in degree.
      void setRange(double range)
      Sets the distance between the camera and the viewpoint.
      void setTilt(double tilt)
      Sets the angle between LookAt position and the surface normal which ranges from 0 to 90 degree.
      java.lang.String toString()
      Returns a string for describing the LookAt object

      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Constructor Detail

      • LookAt

        public LookAt(double longitude,
              double latitude,
              double range)
        Constructs a new LookAt object based on the longitude and latitude of the specified viewpoint and the distance from the specified camera.
        Parameters:
        longitude - The specified longitude.
        latitude - The specified latitude
        range - The specified distance

      • LookAt

        public LookAt(double longitude,
              double latitude,
              double range,
              AltitudeMode mode)
        Constructs a new LookAt object based on the longitude and latitude of the specified viewpoint and the distance from the specified camera.
        Parameters:
        longitude - The specified longitude.
        latitude - The specified latitude
        range - The specified distance
        mode - The specified altitude mode

      • LookAt

        public LookAt(double longitude,
              double latitude,
              double altitude,
              AltitudeMode mode,
              double tilt,
              double heading,
              double range)
        Constructs a new LookAt object based on the longitude, latitude, angle of pitch, azimuth angle, distance and altitude mode of the specified viewpoint.
        Parameters:
        longitude - The specified longitude.
        latitude - The specified latitude
        altitude - The specified altitude
        mode - The specified altitude mode
        tilt - The specified angle of pitch
        heading - The specified azimuth
        range - The specified distance

    • Method Detail

      • getLatitude

        public double getLatitude()
        Gets the latitude of the viewpoint. Identifies the degree north or south of the equator and the value ranges from -90 degree to 90 degree.
        Returns:
        Gets the latitude of the viewpoint.

      • setLatitude

        public void setLatitude(double latitude)
        Sets the latitude of the viewpoint. Identifies the degree north or south of the equator and the value ranges from -90 degree to 90 degree.
        Parameters:
        latitude - The specified latitude

      • getLongitude

        public double getLongitude()
        Gets the longitude of the viewpoint relative to the prime meridian in degree. The value west of the prime meridian ranges from -180 to 0 degree, and the value east of the prime meridian ranges from 0 degree to 180 degree.
        Returns:
        Gets the longitude of the viewpoint relative to the prime meridian in degree.

      • setLongtitude

        public void setLongtitude(double longtitude)
        Sets the latitude of the viewpoint relative to the prime meridian in degree. The value west of the prime meridian ranges from -180 to 0 degree, and the value east of the prime meridian ranges from 0 degree to 180 degree.
        Parameters:
        longtitude - The specified longitude

      • getAltitude

        public double getAltitude()
        Gets the altitude of the viewpoint
        Returns:
        Gets the altitude of the viewpoint

      • setAltitude

        public void setAltitude(double atitude)
        Sets the altitude of the viewpoint
        Parameters:
        atitude - the specified altitude

      • getTilt

        public double getTilt()
        Gets the angle between LookAt position and the surface normal which ranges from 0 to 90 degree. O degree means checking the viewpoint vertically, while 90 degree means viewing the observation point horizontally.
        Returns:
        Gets the angle between LookAt position and the surface normal which ranges from 0 to 90 degree.

      • setTilt

        public void setTilt(double tilt)
        Sets the angle between LookAt position and the surface normal which ranges from 0 to 90 degree. O degree means checking the viewpoint vertically, while 90 degree means viewing the observation point horizontally.
        Parameters:
        tilt - The specified angle

      • getHeading

        public double getHeading()
        Gets the azimuth of the viewpoint that is the angle between the north and the point in the clockwise direction which ranges from 0 to 360 degree
        Returns:
        Gets the azimuth of the viewpoint that is the angle between the north and the point in the clockwise direction which ranges from 0 to 360 degree

      • setHeading

        public void setHeading(double heading)
        Sets the azimuth of the viewpoint that is the angle between the north and the point in the clockwise direction which ranges from 0 to 360 degree
        Parameters:
        heading - The specified azimuth

      • getRange

        public double getRange()
        Gets the distance between the camera and the viewpoint. Unit: meter.
        Returns:
        Gets the distance between the camera and the viewpoint. Unit: meter.

      • setRange

        public void setRange(double range)
        Sets the distance between the camera and the viewpoint. Unit: meter.
        Parameters:
        range - The specified distance

      • getAltitudeMode

        public AltitudeMode getAltitudeMode()
        Gets the altitude mode of the viewpoint
        Returns:
        Gets the altitude mode of the viewpoint

      • setAltitudeMode

        public void setAltitudeMode(AltitudeMode mode)
        Sets the altitude mode of the viewpoint.
        Parameters:
        mode - The specified altitude mode

      • isValid

        public boolean isValid()
        Determines whether it is visible
        Returns:
        Determines whether it is visible

      • equals

        public boolean equals(LookAt lookAt)
        Determines whether the two camera are the same
        Parameters:
        lookAt - The specified target camera LookAt.
        Returns:
        Determines whether the two camera are the same

      • toString

        public java.lang.String toString()
        Returns a string for describing the LookAt object
        Overrides:
        toString in class java.lang.Object
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