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WebGL2RenderingContext: drawArraysInstanced() method - Web APIs | MDN
WebGL2RenderingContext: drawArraysInstanced() method Baseline Widely available
The WebGL2RenderingContext.drawArraysInstanced()
method
of the WebGL 2 API renders primitives from
array data like the gl.drawArrays()
method. In addition, it can execute multiple instances of the range of elements.
drawArraysInstanced(mode, first, count, instanceCount)
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.
instanceCount
A GLsizei
specifying the number of instances of the range of elements
to execute.
gl.drawArraysInstanced(gl.POINTS, 0, 8, 4);