This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The WebGL2RenderingContext.drawArraysInstanced()
method of the WebGL 2 API renders primitives from array data like the gl.drawArrays()
method. In addition, it can execute multiple instances of the range of elements.
Note: When using WebGL 1, the ANGLE_instanced_arrays
extension can provide this method, too.
Syntax
void gl.drawArraysInstanced(mode, first, count, instanceCount);
Parameters
mode
- A
GLenum
specifying the type primitive to render. Possible values are:gl.POINTS
: Draws a single dot.gl.LINE_STRIP
: Draws a straight line to the next vertex.gl.LINE_LOOP
: Draws a straight line to the next vertex, and connects the last vertex back to the first.gl.LINES
: Draws a line between a pair of vertices.gl.TRIANGLE_STRIP
gl.TRIANGLE_FAN
gl.TRIANGLES
: Draws a triangle for a group of three vertices.
- first
- A
GLint
specifying the starting index in the array of vector points. - count
- A
GLsizei
specifying the number of indices to be rendered. - instanceCount
- A
GLsizei
specifying the number of instances of the range of elements to execute.
Return value
None.
Examples
gl.drawArraysInstanced(gl.POINTS, 0, 8, 4);
Specifications
Specification | Status | Comment |
---|---|---|
WebGL 2.0 The definition of 'drawArraysInstanced' in that specification. |
Editor's Draft | Initial definition for WebGL. |
OpenGL ES 3.0 The definition of 'glDrawArraysInstanced' in that specification. |
Standard | Man page of the (similar) OpenGL 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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
drawArraysInstanced | 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