Get the mode vector
int_T *ssGetModeVector(SimStruct *S)
Use to obtain a pointer to the mode vector. This vector has length ssGetNumModes(S). Typically, this vector is initialized in mdlInitializeConditions if the default value of 0 isn't acceptable. It is then used in mdlOutputs, in conjunction with nonsampled zero crossings, to determine when the output function should change mode. For example, consider an absolute value function. When the input is negative, negate it to create a positive value; otherwise, take no action. This function has two modes. The output function should be designed not to change modes during minor time steps. You can also use the mode vector in the mdlZeroCrossings routine to determine the current mode.