source: trunk/docs/api/zoo-geometry-point.txt @ 774

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1.. _api-zoo-geometry-point:
2
3ZOO.Geometry.Point
4==================
5
6Point geometry class.
7
8Inherits from
9
10- :ref:`ZOO.Geometry <api-zoo-geometry>`
11
12Properties     
13----------
14
15.. list-table::
16   :widths: 12 50
17   :header-rows: 1
18
19   * - NAME
20     - DESCRIPTION
21   * - :ref:`x <x>`
22     - {float}
23   * - :ref:`y <y>`
24     - {float}
25
26Functions       
27---------
28
29.. list-table::
30   :widths: 15 50
31   :header-rows: 1
32
33   * - NAME
34     - DESCRIPTION   
35   * - :ref:`ZOO.Geometry.Point <ZOO.Geometry.Point>`
36     - Construct a point geometry.
37   * - :ref:`clone <clone>`
38     - {ZOO.Geometry.Point} An exact clone of this ZOO.Geometry.Point   
39   * - :ref:`calculateBounds <calculateBounds>`
40     - Create a new Bounds based on the x/y
41   * - :ref:`equals <equals>`
42     - Determine whether another geometry is equivalent to this one.
43   * - :ref:`toShortString <toShortString>`
44     - {String} Shortened String representation of Point object.
45   * - :ref:`move <move>`
46     - Moves a geometry by the given displacement along positive x and y axes.
47   * - :ref:`rotate <rotate>`
48     - Rotate a point around another.
49   * - :ref:`getCentroid <getCentroid>`
50     - {ZOO.Geometry.Point} The centroid of the collection
51   * - :ref:`resize <resize>`
52     - Resize a point relative to some origin.
53   * - :ref:`intersects <intersects>`
54     - Determine if the input geometry intersects this one. 
55   * - :ref:`transform <transform>`
56     - Translate the x,y properties of the point from source to dest.
57   * - :ref:`getVertices <getVertices>`
58     - Return a list of all points in this geometry.     
59   
60     
61**Properties**
62       
63.. _x:
64
65x       
66  ``{float}``
67 
68.. _y: 
69 
70y       
71  ``{float}``
72 
73**Functions** 
74
75.. _ZOO.Geometry.Point: 
76
77ZOO.Geometry.Point     
78  Construct a point geometry.
79
80  *Parameters*
81 
82  | ``x {float}``
83  | ``y {float}``
84 
85.. _clone: 
86 
87clone   
88  ::
89 
90    clone: function(obj)
91
92  *Returns*
93
94  :ref:`{ZOO.Geometry.Point} <api-zoo-geometry-point>` An exact clone of this ZOO.Geometry.Point
95 
96.. _calculateBounds:   
97 
98calculateBounds
99  ::
100 
101    calculateBounds: function ()
102
103  Create a new Bounds based on the x/y 
104 
105.. _equals:     
106 
107equals 
108  ::
109 
110    equals: function(geom)
111
112  Determine whether another geometry is equivalent to this one.  Geometries are considered
113  equivalent if all components have the same coordinates.
114 
115  *Parameters*
116 
117  ``geom`` :ref:`{ZOO.Geometry.Point} <api-zoo-geometry-point>` The geometry to test.
118 
119  *Returns*
120
121  ``{Boolean}`` The supplied geometry is equivalent to this geometry.
122 
123.. _toShortString:       
124 
125toShortString   
126  ::
127 
128    toShortString: function()
129
130  *Returns*
131
132  ``{String}`` Shortened String representation of Point object.  (ex.  <i>"5, 42"</i>) 
133 
134.. _move:         
135 
136move   
137  ::
138 
139    move: function(x,y)
140
141  Moves a geometry by the given displacement along positive x and y axes.  This modifies
142  the position of the geometry and clears the cached bounds.
143
144  *Parameters*
145 
146  | ``x {Float}`` Distance to move geometry in positive x direction.
147  | ``y {Float}`` Distance to move geometry in positive y direction.
148 
149.. _rotate:           
150 
151rotate 
152  ::
153 
154    rotate: function(angle,origin)
155
156  Rotate a point around another.
157 
158  *Parameters*
159 
160  | ``angle {Float}`` Rotation angle in degrees (measured counterclockwise from the positive x-axis)
161  | ``origin`` :ref:`{ZOO.Geometry.Point} <api-zoo-geometry-point>` Center point for the rotation
162
163.. _getCentroid:             
164 
165getCentroid     
166  ::
167 
168    getCentroid: function()
169
170  *Returns*
171
172  :ref:`{ZOO.Geometry.Point} <api-zoo-geometry-point>` The centroid of the collection 
173 
174.. _resize:               
175 
176resize 
177  ::
178 
179    resize: function(scale,origin,ratio)
180
181  Resize a point relative to some origin.  For points, this has the effect of scaling a
182  vector (from the origin to the point).  This method is more useful on geometry collection
183  subclasses.
184 
185  *Parameters*
186 
187  | ``scale {Float}`` Ratio of the new distance from the origin to the old distance from the origin.  A scale of 2 doubles the distance between the point and origin.
188  | ``origin`` :ref:`{ZOO.Geometry.Point} <api-zoo-geometry-point>` Point of origin for resizing
189  | ``ratio {Float}`` Optional x:y ratio for resizing.  Default ratio is 1.
190
191  *Returns*
192 
193  :ref:`{ZOO.Geometry} <api-zoo-geometry>` The current geometry. 
194 
195.. _intersects:                 
196 
197intersects     
198  ::
199 
200    intersects: function(geometry)
201
202  Determine if the input geometry intersects this one.
203 
204  *Parameters*
205 
206  ``geometry`` :ref:`{ZOO.Geometry} <api-zoo-geometry>` Any type of geometry.
207
208  *Returns*
209
210  ``{Boolean}`` The input geometry intersects this one.
211 
212.. _transform:                   
213 
214transform       
215  ::
216 
217    transform: function(source,dest)
218
219  Translate the x,y properties of the point from source to dest.
220 
221  *Parameters*
222 
223  | ``source`` :ref:`{ZOO.Projection} <api-zoo-projection>`
224  | ``dest`` :ref:`{ZOO.Projection} <api-zoo-projection>`
225 
226  *Returns*
227
228  :ref:`{ZOO.Geometry} <api-zoo-geometry>`
229 
230.. _getVertices:                     
231 
232getVertices     
233  ::
234 
235    getVertices: function(nodes)
236
237  Return a list of all points in this geometry.
238 
239  *Parameters*
240 
241  ``nodes {Boolean}`` For lines, only return vertices that are endpoints.  If false, for lines,
242  only vertices that are not endpoints will be returned.  If not provided, all vertices will be returned.
243
244  *Returns*
245
246  ``{Array}`` A list of all vertices in the geometry.
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