WebGLRenderingContext: drawArrays() method
The WebGLRenderingContext.drawArrays() method of the WebGL API renders primitives from array data.
Syntax
js
drawArrays(mode, first, count)
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.
Return value
None (undefined).
Exceptions
-
If
modeis not one of the accepted values, agl.INVALID_ENUMerror is thrown. -
If
firstorcountare negative, agl.INVALID_VALUEerror is thrown. -
if
gl.CURRENT_PROGRAMisnull, agl.INVALID_OPERATIONerror is thrown.
Examples
js
gl.drawArrays(gl.POINTS, 0, 8);
Specifications
| Specification |
|---|
| WebGL Specification # 5.14.11 |
Browser compatibility
BCD tables only load in the browser
See also
WebGLRenderingContext.drawElements()ext.drawArraysInstancedANGLE()ext.drawElementsInstancedANGLE()ext.vertexAttribDivisorANGLE()WebGL2RenderingContext.drawArraysInstanced()WebGL2RenderingContext.drawElementsInstanced()WebGL2RenderingContext.vertexAttribDivisor()WEBGL_multi_draw.multiDrawArraysWEBGL()