With bedtools you can make genomic windows from a genome file or a bed file
input.bed
chr1 1000000 1500000
chr3 500000 900000
[prompt]$ bedtools makewindows -b input.bed -w 250000
chr1 1000000 1250000
chr1 1250000 1500000
chr3 500000 750000
chr3 750000 900000
Does the bedops suite provide a similar way to create genomic windows?