The WebGLRenderingContext.getVertexAttrib()
method of the WebGL API returns information about a vertex attribute at a given position.
Syntax
any gl.getVertexAttrib(index, pname);
Parameters
index
- A
GLuint
specifying the index of the vertex attribute. pname
- A
GLenum
specifying the information to query. Possible values:gl.VERTEX_ATTRIB_ARRAY_BUFFER_BINDING
: Returns the currently boundWebGLBuffer
.gl.VERTEX_ATTRIB_ARRAY_ENABLED
: Returns aGLboolean
that istrue
if the vertex attribute is enabled at thisindex
. Otherwisefalse
.gl.VERTEX_ATTRIB_ARRAY_SIZE
: Returns aGLint
indicating the size of an element of the vertex array.gl.VERTEX_ATTRIB_ARRAY_STRIDE
: Returns aGLint
indicating the number of bytes between successive elements in the array. 0 means that the elements are sequential.gl.VERTEX_ATTRIB_ARRAY_TYPE
: Returns aGLenum
representing the array type. One ofgl.BYTE
,gl.UNSIGNED_BYTE
,gl.SHORT
,gl.UNSIGNED_SHORT
,gl.FLOAT
.
gl.VERTEX_ATTRIB_ARRAY_NORMALIZED
: Returns aGLboolean
that is true if fixed-point data types are normalized for the vertex attribute array at the givenindex
.gl.CURRENT_VERTEX_ATTRIB
: Returns aFloat32Array
(with 4 elements) representing the current value of the vertex attribute at the givenindex
.- When using a WebGL 2 context, the following values are available additionally:
- When using the
ANGLE_instanced_arrays
extension:ext.VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE
: Returns aGLint
describing the frequency divisor used for instanced rendering.
Return value
Returns the requested vertex attribute information (as specified with pname
).
Examples
gl.getVertexAttrib(0, gl.VERTEX_ATTRIB_ARRAY_BUFFER_BINDING);
Specifications
Specification | Status | Comment |
---|---|---|
WebGL 1.0 The definition of 'getVertexAttrib' in that specification. |
Recommendation | Initial definition for WebGL. |
OpenGL ES 2.0 The definition of 'glGetVertexAttrib' in that specification. |
Standard | Man page of the OpenGL ES 2 API. |
WebGL 2.0 The definition of 'getVertexAttrib' in that specification. |
Editor's Draft | Updated definition for WebGL 2. |
OpenGL ES 3.0 The definition of 'glGetVertexAttrib' in that specification. |
Standard | Man page of the OpenGL ES 3 API. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
getVertexAttrib | Chrome Full support 9 | Edge Full support 12 | Firefox Full support 4 | IE Full support 11 | Opera Full support 12 | Safari Full support 5.1 | WebView Android Full support Yes | Chrome Android Full support 25 | Firefox Android Full support Yes | Opera Android Full support 12 | Safari iOS Full support 8 | Samsung Internet Android Full support 1.5 |
WebGL2 | Chrome Full support 56 | Edge Full support 79 | Firefox Full support 51 | IE No support No | Opera Full support 43 | Safari No support No | WebView Android Full support 58 | Chrome Android Full support 58 | Firefox Android Full support 51 | Opera Android Full support 43 | Safari iOS No support No | Samsung Internet Android Full support 7.0 |
Legend
- Full support
- Full support
- No support
- No support