ol.extent
Methods
ol.extent.applyTransform(extent, transformFn, opt_extent){
ol.Extent}
src/ol/extent.js,
line 863
Apply a transform function to the extent.
|
Name
|
Type
|
Description
|
|
extent
|
ol.Extent
|
Extent.
|
|
transformFn
|
ol.TransformFunction
|
Transform function. Called with [minX, minY, maxX, maxY] extent coordinates.
|
|
extent
|
ol.Extent
|
Destination extent.
|
Returns:
Extent.
ol.extent.boundingExtent(coordinates){
ol.Extent}
src/ol/extent.js,
line 54
Build an extent that includes all given coordinates.
|
Name
|
Type
|
Description
|
|
coordinates
|
Array.<ol.Coordinate>
|
Coordinates.
|
Returns:
Bounding extent.
ol.extent.buffer(extent, value, opt_extent){
ol.Extent}
src/ol/extent.js,
line 89
Return extent increased by the provided value.
|
Name
|
Type
|
Description
|
|
extent
|
ol.Extent
|
Extent.
|
|
value
|
number
|
The amount by which the extent should be buffered.
|
|
extent
|
ol.Extent
|
Extent.
|
Returns:
Extent.
ol.extent.containsCoordinate(extent, coordinate){boolean}
src/ol/extent.js,
line 161
Check if the passed coordinate is contained or on the edge of the extent.
Returns:
The coordinate is contained in the extent.
ol.extent.containsExtent(extent1, extent2){boolean}
src/ol/extent.js,
line 178
Check if one extent contains another.
An extent is deemed contained if it lies completely within the other extent, including if they share one or more edges.
Returns:
The second extent is contained by or on the edge of the first.
ol.extent.containsXY(extent, x, y){boolean}
src/ol/extent.js,
line 193
Check if the passed coordinate is contained or on the edge of the extent.
|
Name
|
Type
|
Description
|
|
extent
|
ol.Extent
|
Extent.
|
|
x
|
number
|
X coordinate.
|
|
y
|
number
|
Y coordinate.
|
Returns:
The x, y values are contained in the extent.
ol.extent.createEmpty(){
ol.Extent}
src/ol/extent.js,
line 235
Create an empty extent.
Returns:
Empty extent.
ol.extent.equals(extent1, extent2){boolean}
src/ol/extent.js,
line 341
Determine if two extents are equivalent.
Returns:
The two extents are equivalent.
ol.extent.extend(extent1, extent2){
ol.Extent}
src/ol/extent.js,
line 354
Modify an extent to include another extent.
|
Name
|
Type
|
Description
|
|
extent1
|
ol.Extent
|
The extent to be modified.
|
|
extent2
|
ol.Extent
|
The extent that will be included in the first.
|
Returns:
A reference to the first (extended) extent.
ol.extent.getBottomLeft(extent){
ol.Coordinate}
src/ol/extent.js,
line 500
Get the bottom left coordinate of an extent.
|
Name
|
Type
|
Description
|
|
extent
|
ol.Extent
|
Extent.
|
Returns:
Bottom left coordinate.
ol.extent.getBottomRight(extent){
ol.Coordinate}
src/ol/extent.js,
line 511
Get the bottom right coordinate of an extent.
|
Name
|
Type
|
Description
|
|
extent
|
ol.Extent
|
Extent.
|
Returns:
Bottom right coordinate.
ol.extent.getCenter(extent){
ol.Coordinate}
src/ol/extent.js,
line 522
Get the center coordinate of an extent.
|
Name
|
Type
|
Description
|
|
extent
|
ol.Extent
|
Extent.
|
Returns:
Center.
ol.extent.getHeight(extent){number}
src/ol/extent.js,
line 599
Get the height of an extent.
|
Name
|
Type
|
Description
|
|
extent
|
ol.Extent
|
Extent.
|
Returns:
Height.
ol.extent.getIntersection(extent1, extent2, opt_extent){
ol.Extent}
src/ol/extent.js,
line 623
Get the intersection of two extents.
|
Name
|
Type
|
Description
|
|
extent1
|
ol.Extent
|
Extent 1.
|
|
extent2
|
ol.Extent
|
Extent 2.
|
|
extent
|
ol.Extent
|
Optional extent to populate with intersection.
|
Returns:
Intersecting extent.
ol.extent.getSize(extent){
ol.Size}
src/ol/extent.js,
line 666
Get the size (width, height) of an extent.
|
Name
|
Type
|
Description
|
|
extent
|
ol.Extent
|
The extent.
|
Returns:
The extent size.
ol.extent.getTopLeft(extent){
ol.Coordinate}
src/ol/extent.js,
line 677
Get the top left coordinate of an extent.
|
Name
|
Type
|
Description
|
|
extent
|
ol.Extent
|
Extent.
|
Returns:
Top left coordinate.
ol.extent.getTopRight(extent){
ol.Coordinate}
src/ol/extent.js,
line 688
Get the top right coordinate of an extent.
|
Name
|
Type
|
Description
|
|
extent
|
ol.Extent
|
Extent.
|
Returns:
Top right coordinate.
ol.extent.getWidth(extent){number}
src/ol/extent.js,
line 699
Get the width of an extent.
|
Name
|
Type
|
Description
|
|
extent
|
ol.Extent
|
Extent.
|
Returns:
Width.
ol.extent.intersects(extent1, extent2){boolean}
src/ol/extent.js,
line 711
Determine if one extent intersects another.
Returns:
The two extents intersect.
ol.extent.isEmpty(extent){boolean}
src/ol/extent.js,
line 725
Determine if an extent is empty.
|
Name
|
Type
|
Description
|
|
extent
|
ol.Extent
|
Extent.
|
Returns:
Is empty.
标签：src,ol,extent,js,Returns,ol3,openlayers,Extent
来源： https://www.cnblogs.com/devgis/p/16377264.html