glUniform2fint

glUniform2fv is a function in the OpenGL API used to set the value of a uniform variable in a shader program. Uniform variables are used to pass data from the application to the shaders, such as transformation matrices, light positions, or material properties. The function is specifically designed to set the value of a uniform variable that is a two-component floating-point vector (vec2).

The function prototype for glUniform2fv is as follows:

void glUniform2fv(GLint location, GLsizei count, const GLfloat *value);

The parameters for this function are:

location: The location of the uniform variable in the shader program. This is obtained using the glGetUniformLocation function.

count: The number of vec2 values to be set.

value: A pointer to an array of GLfloat values representing the vec2 values to be set.

The function sets the value of the uniform variable at the specified location to the values provided in the value array. The count parameter specifies how many vec2 values should be set. If count is greater than 1, the function will set multiple vec2 values in the shader program.

It is important to note that the uniform variable must be of type vec2 in the shader program for the glUniform2fv function to work correctly. Additionally, the function should be called after linking the shader program and before rendering any geometry.

In summary, glUniform2fv is a useful function in the OpenGL API for setting the value of a uniform variable that is a two-component floating-point vector in a shader program. It allows developers to pass data from the application to the shaders, enabling various rendering effects and optimizations.