ANGLE_instanced_arrays: drawArraysInstancedANGLE() method
The ANGLE_instanced_arrays.drawArraysInstancedANGLE()
method of the WebGL 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 WebGL2
, this method is available as gl.drawArraysInstanced()
by default.
Syntax
js
drawArraysInstancedANGLE(mode, first, count, primcount)
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. primcount
-
A
GLsizei
specifying the number of instances of the range of elements to execute.
Return value
None (undefined
).
Exceptions
- If
mode
is not one of the accepted values, agl.INVALID_ENUM
error is thrown. - If
first
,count
orprimcount
are negative, agl.INVALID_VALUE
error is thrown. - if
gl.CURRENT_PROGRAM
isnull
, agl.INVALID_OPERATION
error is thrown.
Examples
js
const ext = gl.getExtension("ANGLE_instanced_arrays");
ext.drawArraysInstancedANGLE(gl.POINTS, 0, 8, 4);
Specifications
Specification |
---|
WebGL ANGLE_instanced_arrays Khronos Ratified Extension Specification |
Browser compatibility
BCD tables only load in the browser
See also
ext.drawElementsInstancedANGLE()
ext.vertexAttribDivisorANGLE()
WebGLRenderingContext.drawArrays()
WebGLRenderingContext.drawElements()
WebGL2RenderingContext.drawArraysInstanced()
WebGL2RenderingContext.drawElementsInstanced()
WebGL2RenderingContext.vertexAttribDivisor()
WEBGL_multi_draw.multiDrawArraysInstancedWEBGL()