WebGL2RenderingContext.drawArraysInstanced

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.

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

See also

• ANGLE_instanced_arrays.drawArraysInstancedANGLE()