WebGLRenderingContext.drawArrays()
The WebGLRenderingContext.drawArrays()
method of the WebGL API renders primitives from array data.
Syntax
void gl.drawArrays(mode, first, count);
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.
Return value
None.
Exceptions
-
If
mode
is not one of the accepted values, agl.INVALID_ENUM
error is thrown. -
If
first
orcount
are negative, agl.INVALID_VALUE
error is thrown. -
if
gl.CURRENT_PROGRAM
isnull
, agl.INVALID_OPERATION
error is thrown.
Examples
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()