WebGLRenderingContext: uniform[1234][fi][v]() method
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 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 (undefined
).
Examples
js
gl.uniform1f(u_alpha, 0.8);
Specifications
Specification |
---|
WebGL Specification # 5.14.10 |
Browser compatibility
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