ANGLE_instanced_arrays

The ANGLE_instanced_arrays extension is part of the WebGL API and allows to draw the same object, or groups of similar objects multiple times, if they share the same vertex data, primitive count and type.

WebGL extensions are available using the WebGLRenderingContext.getExtension() method. For more information, see also Using Extensions in the WebGL tutorial.

Constants

This extension exposes one new constant, which can be used in the gl.getVertexAttrib() method:

ext.VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE

Returns a GLint describing the frequency divisor used for instanced rendering when used in the gl.getVertexAttrib() as the pname parameter.

Methods

This extension exposes three new methods.

ext.drawArraysInstancedANGLE()

Behaves identically to gl.drawArrays() except that multiple instances of the range of elements are executed, and the instance advances for each iteration.

ext.drawElementsInstancedANGLE()

Behaves identically to gl.drawElements() except that multiple instances of the set of elements are executed and the instance advances between each set.

ext.vertexAttribDivisorANGLE()

Modifies the rate at which generic vertex attributes advance when rendering multiple instances of primitives with ext.drawArraysInstancedANGLE() and ext.drawElementsInstancedANGLE().

Examples

Enabling the extension:

var ext = gl.getExtension("ANGLE_instanced_arrays");

Specifications

Browser compatibility

See also

• WebGLRenderingContext.getExtension()
• WebGL2RenderingContext.drawArraysInstanced()
• WebGL2RenderingContext.drawElementsInstanced()
• WebGL2RenderingContext.vertexAttribDivisor()