Describes a two dimensional icon located at the position of the containing
Example billboards
Entity
.
Example billboards
Name | Type | Description | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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options |
Object |
optional
Object with the following properties:
|
Members
alignedAxis : Property
Gets or sets the
Cartesian3
Property specifying the unit vector axis of rotation
in the fixed frame. When set to Cartesian3.ZERO the rotation is from the top of the screen.
-
Default Value:
Cartesian3.ZERO
Gets or sets the Property specifying the
Color
that is multiplied with the image
.
This has two common use cases. First, the same white texture may be used by many different billboards,
each with a different color, to create colored billboards. Second, the color's alpha component can be
used to make the billboard translucent as shown below. An alpha of 0.0
makes the billboard
transparent, and 1.0
makes the billboard opaque.
default |
alpha : 0.5 |
-
Default Value:
Color.WHITE
readonlydefinitionChanged : Event
Gets the event that is raised whenever a property or sub-property is changed or modified.
disableDepthTestDistance : Property
Gets or sets the distance from the camera at which to disable the depth test to, for example, prevent clipping against terrain.
When set to zero, the depth test is always applied. When set to Number.POSITIVE_INFINITY, the depth test is never applied.
distanceDisplayCondition : Property
Gets or sets the
DistanceDisplayCondition
Property specifying at what distance from the camera that this billboard will be displayed.
eyeOffset : Property
Gets or sets the
Cartesian3
Property specifying the billboard's offset in eye coordinates.
Eye coordinates is a left-handed coordinate system, where x
points towards the viewer's
right, y
points up, and z
points into the screen.
An eye offset is commonly used to arrange multiple billboards or objects at the same position, e.g., to arrange a billboard above its corresponding 3D model.
Below, the billboard is positioned at the center of the Earth but an eye offset makes it always appear on top of the Earth regardless of the viewer's or Earth's orientation.
b.eyeOffset = new Cartesian3(0.0, 8000000.0, 0.0);
-
Default Value:
Cartesian3.ZERO
Gets or sets the numeric Property specifying the height of the billboard in pixels.
When undefined, the native height is used.
heightReference : Property
Gets or sets the Property specifying the
HeightReference
.
-
Default Value:
HeightReference.NONE
horizontalOrigin : Property
Gets or sets the Property specifying the
HorizontalOrigin
.
-
Default Value:
HorizontalOrigin.CENTER
Gets or sets the Property specifying the Image, URI, or Canvas to use for the billboard.
imageSubRegion : Property
Gets or sets the Property specifying a
BoundingRectangle
that defines a
sub-region of the image
to use for the billboard, rather than the entire image,
measured in pixels from the bottom-left.
pixelOffset : Property
Gets or sets the
The billboard's origin is indicated by the yellow point.
Cartesian2
Property specifying the billboard's pixel offset in screen space
from the origin of this billboard. This is commonly used to align multiple billboards and labels at
the same position, e.g., an image and text. The screen space origin is the top, left corner of the
canvas; x
increases from left to right, and y
increases from top to bottom.
default |
b.pixeloffset = new Cartesian2(50, 25); |
-
Default Value:
Cartesian2.ZERO
pixelOffsetScaleByDistance : Property
Gets or sets
NearFarScalar
Property specifying the pixel offset of the billboard based on the distance from the camera.
A billboard's pixel offset will interpolate between the NearFarScalar#nearValue
and
NearFarScalar#farValue
while the camera distance falls within the upper and lower bounds
of the specified NearFarScalar#near
and NearFarScalar#far
.
Outside of these ranges the billboard's pixel offset remains clamped to the nearest bound.
rotation : Property
Gets or sets the numeric Property specifying the rotation of the image
counter clockwise from the
alignedAxis
.
-
Default Value:
0
Gets or sets the numeric Property specifying the uniform scale to apply to the image.
A scale greater than
From left to right in the above image, the scales are
1.0
enlarges the billboard while a scale less than 1.0
shrinks it.
From left to right in the above image, the scales are
0.5
, 1.0
, and 2.0
.
-
Default Value:
1.0
scaleByDistance : Property
Gets or sets
NearFarScalar
Property specifying the scale of the billboard based on the distance from the camera.
A billboard's scale will interpolate between the NearFarScalar#nearValue
and
NearFarScalar#farValue
while the camera distance falls within the upper and lower bounds
of the specified NearFarScalar#near
and NearFarScalar#far
.
Outside of these ranges the billboard's scale remains clamped to the nearest bound.
Gets or sets the boolean Property specifying the visibility of the billboard.
-
Default Value:
true
sizeInMeters : Property
Gets or sets the boolean Property specifying if this billboard's size will be measured in meters.
-
Default Value:
false
translucencyByDistance : Property
Gets or sets
NearFarScalar
Property specifying the translucency of the billboard based on the distance from the camera.
A billboard's translucency will interpolate between the NearFarScalar#nearValue
and
NearFarScalar#farValue
while the camera distance falls within the upper and lower bounds
of the specified NearFarScalar#near
and NearFarScalar#far
.
Outside of these ranges the billboard's translucency remains clamped to the nearest bound.
verticalOrigin : Property
Gets or sets the Property specifying the
VerticalOrigin
.
-
Default Value:
VerticalOrigin.CENTER
Gets or sets the numeric Property specifying the width of the billboard in pixels.
When undefined, the native width is used.
Methods
clone(result) → BillboardGraphics
Duplicates this instance.
Name | Type | Description |
---|---|---|
result |
BillboardGraphics | optional The object onto which to store the result. |
Returns:
The modified result parameter or a new instance if one was not provided.
Assigns each unassigned property on this object to the value
of the same property on the provided source object.
Name | Type | Description |
---|---|---|
source |
BillboardGraphics | The object to be merged into this object. |