5-survivor.cpp

// If survivor is alive..
if (survivor.state != "state_dead") {

    ...
  
    // If survivor is stabbing..
    if (survivor.state == "state_stab") {
        
        // If we're at the third animation frame, and attack has not been delivered yet..
        if (survivor.frameX / survivor.animSpeed == 2 && !survivor.stab) {
            survivor.stab = true;
            stabZombies();          // Call the utility function
        }
        
        // If the animation is complete..
        if (survivor.animCompleted) {
            survivor.frameY = 0;
            survivor.state = "state_idle";    // Go back to the idle state
        }
    }
} else { // state dead
    if (survivor.animCompleted) { // Wait for death animation to complete
        survivor.alive = false;   // Survivor is no more
    }
}