addElements method
add new min and max elements to the sweep and prune axis
Implementation
void addElements(SAPElement min,SAPElement max ) {
if(numElements+2>=bufferSize){
//this.bufferSize<<=1;
bufferSize*=2;
List<SAPElement?> newElements = [];
for(int i = 0; i < numElements; i++){
newElements.add(elements[i]);
}
}
elements[numElements++] = min;
elements[numElements++] = max;
}