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HERE Maps API - Utility class Vector3D

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|platform= <!-- Compatible platforms - e.g. Symbian^1 and later, Qt 4.6 and later -->
 
|platform= <!-- Compatible platforms - e.g. Symbian^1 and later, Qt 4.6 and later -->
 
|devicecompatability= <!-- Compatible devices e.g.: All* (must have internal GPS) -->
 
|devicecompatability= <!-- Compatible devices e.g.: All* (must have internal GPS) -->
|dependencies=Nokia Maps 2.2.1
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|dependencies=Nokia Maps 2.2.4
 
|signing=<!-- Signing requirements - empty or one of: Self-Signed, DevCert, Manufacturer -->
 
|signing=<!-- Signing requirements - empty or one of: Self-Signed, DevCert, Manufacturer -->
 
|capabilities= <!-- Capabilities required by the article/code example (e.g. Location, NetworkServices. -->
 
|capabilities= <!-- Capabilities required by the article/code example (e.g. Location, NetworkServices. -->
|keywords= <!-- APIs, classes and methods (e.g. QSystemScreenSaver, QList, CBase -->
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|keywords= Nokia Maps, JavaScript, vectors
 
|id= <!-- Article Id (Knowledge base articles only) -->
 
|id= <!-- Article Id (Knowledge base articles only) -->
 
|language= <!-- Language category code for non-English topics - e.g. Lang-Chinese -->
 
|language= <!-- Language category code for non-English topics - e.g. Lang-Chinese -->
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}}
 
}}
 
{{SeeAlso|
 
{{SeeAlso|
*  [http://api.maps.nokia.com/en/maps/intro.html Nokia Maps API]  
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*  [http://developer.here.net/javascript_api Nokia Maps API]  
 
  }}
 
  }}
  
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This is a class representing a three dimensional vector. Full description is here:
 
This is a class representing a three dimensional vector. Full description is here:
  
http://api.maps.nokia.com/2.2.1/apireference/symbols/nokia.maps.util.Vector3D.html
+
http://developer.here.net/docs/maps_js/topics_api_pub/nokia.maps.util.Vector3D.html
  
 
== Usage examples ==
 
== Usage examples ==
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The "add(other)" method would create a sum of this vector and the added one.
+
The "add(other)" method would create the sum of this vector and the added one.
 
   
 
   
 
We will create two Vector3D's and then create the third based on adding the 2nd to the 1st Vector3D.
 
We will create two Vector3D's and then create the third based on adding the 2nd to the 1st Vector3D.
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angle ([px, [py, [intertX, [intertY]]]]) : Number
 
angle ([px, [py, [intertX, [intertY]]]]) : Number
 
   
 
   
Example on requesting angle for the myVector3:
+
Example on requesting the angle for myVector3:
 
   
 
   
<code java>
+
<code javascript>
 
>>> myVector3.angle();
 
>>> myVector3.angle();
 
</code>
 
</code>
  
 
Would return us a numeric value as follows:
 
Would return us a numeric value as follows:
<code java>
+
<code javascript>
 
45.00000000000001
 
45.00000000000001
 
</code>
 
</code>
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And let's try one more operation with the "subtract" method. With it we can get the difference between two vectors:
 
And let's try one more operation with the "subtract" method. With it we can get the difference between two vectors:
  
<code java>
+
<code javascript>
 
>>> subtracted = myVector3.subtract(myVector1);
 
>>> subtracted = myVector3.subtract(myVector1);
 
</code>
 
</code>
  
 
Would return us:
 
Would return us:
<code java>
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<code javascript>
 
Object { x=20, y=20, z=20}
 
Object { x=20, y=20, z=20}
 
</code>
 
</code>
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coordinate system that goes possitive to top/right.
 
coordinate system that goes possitive to top/right.
  
For screen coordinates the Y-axis shall be inverted. For a normalized vector  
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For screen coordinates the Y-axis is inverted. For a normalized vector  
 
the method can be called without parameters to return it's normalized angle.
 
the method can be called without parameters to return it's normalized angle.
  
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== Tested with ==
 
== Tested with ==
  
* Firefox 12.0
+
* Firefox 12.x

Revision as of 14:36, 14 March 2013

Article Metadata
Tested with
Devices(s): Firefox 12.0
Dependencies: Nokia Maps 2.2.4
Article
Keywords: Nokia Maps, JavaScript, vectors
Created: Maveric (28 Jun 2011)
Last edited: jasfox (14 Mar 2013)
See Also

This article explains how to use the Vector3D utility class.

Introduction

This is a class representing a three dimensional vector. Full description is here:

http://developer.here.net/docs/maps_js/topics_api_pub/nokia.maps.util.Vector3D.html

Usage examples

Let's create a new Vector3D object:

>>> myVector = new nokia.maps.util.Vector3D (10, 10, 10) ;

This would return and object containing:

Object { x=10, y=10, z=10}


The "add(other)" method would create the sum of this vector and the added one.

We will create two Vector3D's and then create the third based on adding the 2nd to the 1st Vector3D.

>> myVector1 = new nokia.maps.util.Vector3D (10, 10, 10) ;
>> myVector2 = new nokia.maps.util.Vector3D (20, 20, 20) ;
>> myVector3 = myVector1.add(myVector2);

We would now have myVector3 to contain:

Object { x=30, y=30, z=30 }

With the method "angle" we can request, as the name says the relative angle: angle ([px, [py, [intertX, [intertY]]]]) : Number

Example on requesting the angle for myVector3:

>>> myVector3.angle();

Would return us a numeric value as follows:

45.00000000000001

And let's try one more operation with the "subtract" method. With it we can get the difference between two vectors:

>>> subtracted = myVector3.subtract(myVector1);

Would return us:

Object { x=20, y=20, z=20}

Feel free to try the other methods too, used in a similar manner.

Description of the angle method:

angle ([px, [py, [intertX, [intertY]]]]) : Number
Returns the angle of this vector in decimal degree to the given point within a
coordinate system that goes possitive to top/right.
 
For screen coordinates the Y-axis is inverted. For a normalized vector
the method can be called without parameters to return it's normalized angle.
 
Parameters:
{Number} [px]: The x-coordinate of the point to which the angle shall be calculated, if not given zero is used.
{Number} [py]: The y-coordinate of the point to which the angle shall be calculated, if not given zero is used.
{Boolean} [intertX]: If given and true, the x-axis is inverted, therefore the coordinates are increasing to the left and decreasing to the right.
{Boolean} [intertY]: If given and true, the y-axis is inverted, therefore the coordinates are increasing to the bottom and decreasing to the top.
 
Returns:
{Number} The angle of this vector in degree, relative to the given coordinate.

Tested with

  • Firefox 12.x
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