index.md

---

title: ANGLE_instanced_arrays.drawArraysInstancedANGLE()
slug: Web/API/ANGLE_instanced_arrays/drawArraysInstancedANGLE
page-type: web-api-instance-method
browser-compat: api.ANGLE_instanced_arrays.drawArraysInstancedANGLE

---

{{APIRef("WebGL")}}

The ANGLE_instanced_arrays.drawArraysInstancedANGLE() method of the WebGL API renders primitives from array data like the {{domxref("WebGLRenderingContext.drawArrays()", "gl.drawArrays()")}} method. In addition, it can execute multiple instances of the range of elements.

Note: When using {{domxref("WebGL2RenderingContext", "WebGL2")}}, this method is available as {{domxref("WebGL2RenderingContext.drawArraysInstanced()", "gl.drawArraysInstanced()")}} by default.

Syntax

drawArraysInstancedANGLE(mode, first, count, primcount)

Parameters

• mode

  • : A {{domxref("WebGL_API/Types", "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 {{domxref("WebGL_API/Types", "GLint")}} specifying the starting index in the array of vector points.

• count

  • : A {{domxref("WebGL_API/Types", "GLsizei")}} specifying the number of indices to be rendered.

• primcount

  • : A {{domxref("WebGL_API/Types", "GLsizei")}} specifying the number of instances of the range of elements to execute.

Return value

None ({{jsxref("undefined")}}).

Exceptions

• If mode is not one of the accepted values, a gl.INVALID_ENUM error is thrown.

• If first, count or primcount are negative, a gl.INVALID_VALUE error is thrown.

• if gl.CURRENT_PROGRAM is null, a gl.INVALID_OPERATION error is thrown.

Examples

const ext = gl.getExtension("ANGLE_instanced_arrays");
ext.drawArraysInstancedANGLE(gl.POINTS, 0, 8, 4);

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• {{domxref("ANGLE_instanced_arrays.drawElementsInstancedANGLE()", "ext.drawElementsInstancedANGLE()")}}

• {{domxref("ANGLE_instanced_arrays.vertexAttribDivisorANGLE()", "ext.vertexAttribDivisorANGLE()")}}

• {{domxref("WebGLRenderingContext.drawArrays()")}}

• {{domxref("WebGLRenderingContext.drawElements()")}}

• {{domxref("WebGL2RenderingContext.drawArraysInstanced()")}}

• {{domxref("WebGL2RenderingContext.drawElementsInstanced()")}}

• {{domxref("WebGL2RenderingContext.vertexAttribDivisor()")}}

• {{domxref("WEBGL_multi_draw.multiDrawArraysInstancedWEBGL()")}}