add method
Adds one matrix to another. Addition is defined by taking the maximum dimension value of each position in the summand matrices.
@param im the matrix to add
Implementation
void add(IntersectionMatrix im) {
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
setAtLeast(i, j, im.get(i, j));
}
}
}