VertexFormat

new LSGlobe.VertexFormat(options)
Core/VertexFormat.js 25

A vertex format defines what attributes make up a vertex. A VertexFormat can be provided to a Geometry to request that certain properties be computed, e.g., just position, position and normal, etc.
Name Type Description
options Object optional An object with boolean properties corresponding to VertexFormat properties as shown in the code example.
Example:
// Create a vertex format with position and 2D texture coordinate attributes.
var format = new LSGlobe.VertexFormat({
  position : true,
  st : true
});
See:

Members

static constant LSGlobe.VertexFormat.ALL : VertexFormat
Core/VertexFormat.js 197

An immutable vertex format with well-known attributes: position, normal, st, tangent, and bitangent.
See:

static constant LSGlobe.VertexFormat.DEFAULT : VertexFormat
Core/VertexFormat.js 219

An immutable vertex format with position, normal, and st attributes. This is compatible with most appearances and materials; however normal and st attributes are not always required. When this is known in advance, another VertexFormat should be used.
See:

static LSGlobe.VertexFormat.packedLength : Number
Core/VertexFormat.js 225

The number of elements used to pack the object into an array.

static constant LSGlobe.VertexFormat.POSITION_AND_COLOR : VertexFormat
Core/VertexFormat.js 178

An immutable vertex format with position and color attributes.
See:

static constant LSGlobe.VertexFormat.POSITION_AND_NORMAL : VertexFormat
Core/VertexFormat.js 125

An immutable vertex format with position and normal attributes. This is compatible with per-instance color appearances like PerInstanceColorAppearance.
See:

static constant LSGlobe.VertexFormat.POSITION_AND_ST : VertexFormat
Core/VertexFormat.js 162

An immutable vertex format with position and st attributes. This is compatible with EllipsoidSurfaceAppearance.
See:

static constant LSGlobe.VertexFormat.POSITION_NORMAL_AND_ST : VertexFormat
Core/VertexFormat.js 144

An immutable vertex format with position, normal, and st attributes. This is compatible with MaterialAppearance when MaterialAppearance#materialSupport is TEXTURED/code>.
See:

static constant LSGlobe.VertexFormat.POSITION_ONLY : VertexFormat
Core/VertexFormat.js 109

An immutable vertex format with only a position attribute.
See:

bitangent : Boolean
Core/VertexFormat.js 74

When true, the vertex has a bitangent attribute (normalized), which is used for tangent-space effects like bump mapping.

32-bit floating-point. 3 components per attribute.

Default Value: false

color : Boolean
Core/VertexFormat.js 98

When true, the vertex has an RGB color attribute.

8-bit unsigned byte. 3 components per attribute.

Default Value: false

normal : Boolean
Core/VertexFormat.js 50

When true, the vertex has a normal attribute (normalized), which is commonly used for lighting.

32-bit floating-point. 3 components per attribute.

Default Value: false

position : Boolean
Core/VertexFormat.js 38

When true, the vertex has a 3D position attribute.

64-bit floating-point (for precision). 3 components per attribute.

Default Value: false

st : Boolean
Core/VertexFormat.js 62

When true, the vertex has a 2D texture coordinate attribute.

32-bit floating-point. 2 components per attribute

Default Value: false

tangent : Boolean
Core/VertexFormat.js 86

When true, the vertex has a tangent attribute (normalized), which is used for tangent-space effects like bump mapping.

32-bit floating-point. 3 components per attribute.

Default Value: false

Methods

static LSGlobe.VertexFormat.clone(vertexFormat, result) → VertexFormat
Core/VertexFormat.js 295

Duplicates a VertexFormat instance.
Name Type Description
vertexFormat VertexFormat The vertex format to duplicate.
result VertexFormat optional The object onto which to store the result.
Returns:
The modified result parameter or a new VertexFormat instance if one was not provided. (Returns undefined if vertexFormat is undefined)

static LSGlobe.VertexFormat.pack(value, array, startingIndex) → Array.<Number>
Core/VertexFormat.js 236

Stores the provided instance into the provided array.
Name Type Default Description
value VertexFormat The value to pack.
array Array.<Number> The array to pack into.
startingIndex Number 0 optional The index into the array at which to start packing the elements.
Returns:
The array that was packed into

static LSGlobe.VertexFormat.unpack(array, startingIndex, result) → VertexFormat
Core/VertexFormat.js 266

Retrieves an instance from a packed array.
Name Type Default Description
array Array.<Number> The packed array.
startingIndex Number 0 optional The starting index of the element to be unpacked.
result VertexFormat optional The object into which to store the result.
Returns:
The modified result parameter or a new VertexFormat instance if one was not provided.