WebGL2RenderingContext: drawRangeElements() method

{{APIRef("WebGL")}}{{AvailableInWorkers}}

The WebGL2RenderingContext.drawRangeElements() method of the WebGL API renders primitives from array data in a given range.

Syntax

drawRangeElements(mode, start, end, count, type, offset)

Parameters

• mode

  • : A {{domxref("WebGL_API/Types", "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.

• start

  • : A {{domxref("WebGL_API/Types", "GLuint")}} specifying the minimum array index contained in offset.

• end

  • : A {{domxref("WebGL_API/Types", "GLuint")}} specifying the maximum array index contained in offset.

• count

  • : A {{domxref("WebGL_API/Types", "GLsizei")}} specifying the number of elements to be rendered.

• type

  • : A {{domxref("WebGL_API/Types", "GLenum")}} specifying the type of the values in the element array buffer. Possible values are:
    • gl.UNSIGNED_BYTE
    • gl.UNSIGNED_SHORT
    • gl.UNSIGNED_INT

• offset

  • : A {{domxref("WebGL_API/Types", "GLintptr")}} specifying an offset in the element array buffer. Must be a valid multiple of the size of the given type.

Return value

None ({{jsxref("undefined")}}).

Exceptions

• If mode is not one of the accepted values, a gl.INVALID_ENUM error is thrown.
• If offset is a valid multiple of the size of the given type, a gl.INVALID_OPERATION error is thrown.
• If count is negative, a gl.INVALID_VALUE error is thrown.

Examples

gl.drawRangeElements(gl.POINTS, 0, 7, 8, gl.UNSIGNED_BYTE, 0);

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• {{domxref("WebGLRenderingContext.drawElements()")}}