| Format | Use case | Implementation notes | |--------|----------|----------------------| | | Quick printing, forum sharing | Use monospaced font, line breaks every 10-20 sts | | HTML/CSS | Web display, mobile reading | Responsive design, collapsible sections | | PDF | Professional distribution | Use libraries like ReportLab (Python) or jsPDF (JS) | | CSV | Import into spreadsheet trackers | Rows as records, columns: Row#, Instruction, Stitch count | | Chart symbols | Visual crochet charts | Map stitches to symbols (X for sc, T for hdc) using SVG or Unicode |
| Shape | Construction | Math required | |-------|--------------|----------------| | Rectangle | Rows back and forth | length = rows × row_gauge_height | | Tube (in the round) | Continuous spiral or joined rounds | circumference = sts × stitch_width | | Circle | Rounds with regular increases | increase_rounds: sts += increment | | Triangle | Decrease at edges or center | slope = rate of decrease per row | | Sphere | Increase to max circumference then decrease | symmetric inc/dec rounds | Crochet Pattern Program
PATTERN: Simple Scarf Yarn: Worsted weight, 200 yds Hook: 5.0 mm (H-8) Gauge: 16 sc x 20 rows = 4" Abbreviations: ch = chain sc = single crochet | Format | Use case | Implementation notes