gl uniform

Lately I had problem with variable in my code. Variable that I send to GLSL don't work. It turned out I forgot uniform instruction before variable type.
Of course my memory is good but short.

Tabel of functions that use uniform instructions.

uniform types	functions
float	gl.uniform1f gl.uniform1fv
vec2	gl.uniform2f gl.uniform2fv
vec3	gl.uniform3f gl.uniform3fv
vec4	gl.uniform4f gl.uniform4fv
int	gl.uniform1i gl.uniform1iv
ivec2	gl.uniform2i gl.uniform2iv
ivec3	gl.uniform3i gl.uniform3iv
ivec4	gl.uniform4i gl.uniform4iv
sampler2D	gl.uniform1i gl.uniform1iv
samplerCube	gl.uniform1i gl.uniform1iv
mat2	gl.uniformMatrix2fv
mat3	gl.uniformMatrix3fv
mat4	gl.uniformMatrix4fv
bool	gl.uniform1i gl.uniform1f gl.uniform1iv gl.uniform1fv
bvec2	gl.uniform2i gl.uniform2f gl.uniform2iv gl.uniform2fv
bvec3	gl.uniform3i gl.uniform3f gl.uniform3iv gl.uniform3fv
bvec4	gl.uniform4i gl.uniform4f gl.uniform4iv gl.uniform4fv

Each functions in table take handle to GLSL variable in first argument

In functions prefix i is int, f float and v is table.

gl.getUniformLocation(glsl_program, variable_name) return handle to variable in GLSL.

In WebGL handle will be represented by WebGLUniformLocation interface.