Note: Uses small-angle approximation: $ \text{Actual Size} ≈ \text{Distance} × \tan(\text{Angular Diameter}) ≈ \text{Distance} × \text{radians} $

`; } // PDF Export (now full page width and styled) function generatePDF() { const { jsPDF } = window.jspdf; const doc = new jsPDF(); const resultText = document.getElementById('resultsArea').innerText.trim(); if (!resultText || resultText.includes("click")) { alert("No results to export. Please calculate first."); return; } // Header doc.setFontSize(16); doc.setTextColor(0, 80, 180); doc.text("Angular Diameter to Actual Size Report", 105, 20, null, null, 'center'); // Subtitle doc.setFontSize(12); doc.setTextColor(0, 0, 0); doc.text("Generated by Scientific Calculation Tool", 105, 30, null, null, 'center'); // Content lines let y = 40; const lines = resultText.split('\n'); lines.forEach(line => { if (line.trim()) { doc.text(line, 10, y); y += 10; // Auto page break if (y > 280) { doc.addPage(); y = 20; } } }); // Footer line doc.setDrawColor(0, 80, 180); doc.line(10, y + 2, 200, y + 2); y += 10; doc.setFontSize(10); doc.text("Angular Diameter to Actual Size Converter | Based on scientific unit standards", 10, y); doc.save("Angular_Size_Report.pdf"); } // Attach event listeners document.getElementById('calculateBtn')?.addEventListener('click', calculateActualSize); document.getElementById('pdfBtn')?.addEventListener('click', generatePDF); document.getElementById('prevTab')?.addEventListener('click', () => { const visibleTab = document.querySelector('.tabcontent[style*="block"]'); const index = Array.from(tabContents).indexOf(visibleTab); if (index > 0) showTab(tabContents[index - 1].id); }); document.getElementById('nextTab')?.addEventListener('click', () => { const visibleTab = document.querySelector('.tabcontent[style*="block"]'); const index = Array.from(tabContents).indexOf(visibleTab); if (index < tabContents.length - 1) showTab(tabContents[index + 1].id); }); });