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.
Many of the functions described here have expanded WebGL 2 interfaces, which can be found under WebGL2RenderingContext.uniform[1234][uif][v]()
.
Syntax
void gl.uniform1f(location, v0); void gl.uniform1fv(location, value); void gl.uniform1i(location, v0); void gl.uniform1iv(location, value); void gl.uniform2f(location, v0, v1); void gl.uniform2fv(location, value); void gl.uniform2i(location, v0, v1); void gl.uniform2iv(location, value); void gl.uniform3f(location, v0, v1, v2); void gl.uniform3fv(location, value); void gl.uniform3i(location, v0, v1, v2); void gl.uniform3iv(location, value); void gl.uniform4f(location, v0, v1, v2, v3); void gl.uniform4fv(location, value); void gl.uniform4i(location, v0, v1, v2, v3); void gl.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 anArray
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").
- A floating point
Return value
None.
Examples
gl.uniform1f(u_alpha, 0.8);
Specifications
Specification | Status | Comment |
---|---|---|
WebGL 1.0 The definition of 'uniform' in that specification. |
Recommendation | Initial definition. |
OpenGL ES 2.0 The definition of 'glUniform' in that specification. |
Standard | Main page of the OpenGL API. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
uniform1f | Chrome Full support 9 | Edge Full support 12 | Firefox Full support 4 | IE Full support 11 | Opera Full support 12 | Safari Full support 5.1 | WebView Android Full support Yes | Chrome Android Full support 25 | Firefox Android Full support Yes | Opera Android Full support 12 | Safari iOS Full support 8 | Samsung Internet Android Full support 1.5 |
Legend
- Full support
- Full support