<commit_before>void get_face(float* mean_shape, float* principal_components,
              float* pc_deviations, float* coefficients,
              float* face, int dimensions, int vertices) {
    int i = 0, j;
    do {
        face[i] = mean_shape[i];
        j = 0;
        do {
            face[i] += principal_components[i * dimensions + j]
                       * coefficients[j] * pc_deviations[j];
        } while(++j < dimensions);
    } while(++i < vertices);
}<commit_msg>Implemented C function for one coefficient changing<commit_after>void get_face(float* mean_shape, float* principal_components,
              float* pc_deviations, float* coefficients,
              float* face, int dimensions, int vertices) {
    int i = 0, j;
    do {
        face[i] = mean_shape[i];
        j = 0;
        do {
            face[i] += principal_components[i * dimensions + j]
                       * coefficients[j] * pc_deviations[j];
        } while(++j < dimensions);
    } while(++i < vertices);
}

void get_row(float* principal_components, float* pc_deviations,
             float coefficient_difference, int row,
             float* face, int dimensions, int vertices) {
    int i = 0;
    do {
        face[i] += principal_components[i * dimensions + row]
                   * coefficient_difference * pc_deviations[row];
    } while(++i < vertices);
}
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