The current time, in seconds, or zero if an error occurred.
Errors: Possible errors include @ref GLFW_NOT_INITIALIZED.
This function may be called from any thread. Reading and writing of the internal base time is not atomic, so it needs to be externally synchronized with calls to @ref glfwSetTime.
@sa @ref time
Added in version 1.0.
Ingroup: input
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Returns the GLFW time.
This function returns the current GLFW time, in seconds. Unless the time has been set using @ref glfwSetTime it measures time elapsed since GLFW was initialized.
This function and @ref glfwSetTime are helper functions on top of @ref glfwGetTimerFrequency and @ref glfwGetTimerValue.
The resolution of the timer is system dependent, but is usually on the order of a few micro- or nanoseconds. It uses the highest-resolution monotonic time source on each supported platform.