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WebGL2RenderingContext: drawArraysInstanced() method - Web APIs | MDN
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WebGL2RenderingContext: drawArraysInstanced() method
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2021.
Note: This feature is available in Web Workers.
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
js
drawArraysInstanced(mode, first, count, instanceCount)
Parameters
mode-
A
GLenumspecifying 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_STRIPgl.TRIANGLE_FANgl.TRIANGLES: Draws a triangle for a group of three vertices.
first-
A
GLintspecifying the starting index in the array of vector points. count-
A
GLsizeispecifying the number of indices to be rendered. instanceCount-
A
GLsizeispecifying the number of instances of the range of elements to execute.
Return value
None (undefined).
Examples
js
gl.drawArraysInstanced(gl.POINTS, 0, 8, 4);
Specifications
| Specification |
|---|
| WebGL 2.0 Specification # 3.7.9 |
Browser compatibility
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