## User Story > As a polymer chemist, I want to generate a graft copolymer with randomly placed grafts, to model systems like HIPS. ## Acceptance Criteria - [ ] `BranchedBuilder::graft_copolymer(graft_fraction)` places grafts randomly - [ ] Seed for reproducibility - [ ] Graft fraction is statistically respected ## Files - `crates/polysim-core/src/builder/branched.rs`
User Story
Acceptance Criteria
BranchedBuilder::graft_copolymer(graft_fraction)places grafts randomlyFiles
crates/polysim-core/src/builder/branched.rs