Set shader uniform value.
Arguments
- shader
- A shader. 
- loc_index
- An integer. 
- value
- A number or numerical vector of length 2, 3, or 4. 
See also
Other shader functions: 
begin_shader_mode(),
end_shader_mode(),
get_shader_location_attrib(),
get_shader_location(),
load_shader_from_memory(),
load_shader(),
set_shader_value_matrix(),
set_shader_value_texture(),
unload_shader()
