WebGLRenderingContext: uniform[1234][fi][v]() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

Note: This feature is available in Web Workers.

The WebGLRenderingContext.uniform[1234][fi][v]() methods of the WebGL API specify values of uniform variables. All active uniform variables defined in a program object are initialized to 0 when the program object is linked successfully. They retain the values assigned to them by a call to this method until the next successful link operation occurs on the program object, when they are once again initialized to 0.

Note: Many of the functions described here have expanded WebGL 2 interfaces, which can be found under WebGL2RenderingContext.uniform[1234][uif][v]().

Syntax

js
uniform1f(location, v0)
uniform1fv(location, value)
uniform1i(location, v0)
uniform1iv(location, value)

uniform2f(location, v0, v1)
uniform2fv(location, value)
uniform2i(location, v0, v1)
uniform2iv(location, value)

uniform3f(location, v0, v1, v2)
uniform3fv(location, value)
uniform3i(location, v0, v1, v2)
uniform3iv(location, value)

uniform4f(location, v0, v1, v2, v3)
uniform4fv(location, value)
uniform4i(location, v0, v1, v2, v3)
uniform4iv(location, value)

Parameters

location

A WebGLUniformLocation object containing the location of the uniform attribute to modify.

value, v0, v1, v2, v3

A new value to be used for the uniform variable. Possible types:

  • A floating point Number for floating point values (methods with "f").
  • A sequence of floating point numbers (for example a Float32Array or an Array of numbers) for floating point vector methods (methods with "fv").
  • An integer Number for integer values (methods with "i").
  • An Int32Array for integer vector methods (methods with "iv").

Return value

None (undefined).

Examples

js
gl.uniform1f(u_alpha, 0.8);

Specifications

Specification
WebGL Specification
# 5.14.10

Browser compatibility

BCD tables only load in the browser

See also