WEBGL_multi_draw.multiDrawArraysWEBGL()

The WEBGL_multi_draw.multiDrawArraysWEBGL() method of the WebGL API renders multiple primitives from array data. It is identical to multiple calls to the gl.drawArrays() method.

Syntax

void ext.multiDrawArraysWEBGL(mode,
    firstsList, firstsOffset,
    countsList, countsOffset,
    drawCount);

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.
firstsList

An Int32Array or Array (of GLint) specifying a list of starting indices for the arrays of vector points.

firstsOffset

A GLuint defining the starting point into the firstsLists array.

countsList

An Int32Array or Array (of GLsizei) specifying a list of numbers of indices to be rendered.

countsOffset

A GLuint defining the starting point into the countsList array.

drawCount

A GLsizei specifying the number of instances of the range of elements to execute.

Return value

None.

Exceptions

  • If mode is not one of the accepted values, a gl.INVALID_ENUM error is thrown.
  • If drawCount or items in firstsList and countsList are negative, a gl.INVALID_VALUE error is thrown.
  • if gl.CURRENT_PROGRAM is null, a gl.INVALID_OPERATION error is thrown.

Examples

// let firsts = new Int32Array(...);
// let counts = new Int32Array(...);
ext.multiDrawArraysWEBGL(gl.TRIANGLES, firsts, 0, counts, 0, firsts.length);

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
multiDrawArraysWEBGL
86
86
No
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72
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86
86
No
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No
14.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WEBGL_multi_draw/multiDrawArraysWEBGL