Teach the glass where to fold.
Traditional forming gives the sheet one broad instruction: heat and let gravity shape it. This brief makes the engineering contrast easier to inspect without filling in the missing method.
Compare the forming lens
Heat, soften, sag
The supplied passage describes the familiar baseline: the entire sheet softens and gravity pulls it into a broad curve.
Source-bounded forming lenses and a local process question
Read the explanation
The source offers three fixed lenses: whole sheet sag, localized fold control and inspection questions. Bars compare three written lens definitions with zero supplied localized methods at one hundred fifty pixels per item. The baseline text attributes broad curve formation to softening the whole sheet and gravity. The localized process is explicitly an open question. This explainer counts the source definitions; it does not simulate material behavior, establish temperatures or invent equipment. The inspection lens asks about where heat goes, how the sheet is supported and how the final shape is checked. Bars compare three question categories with zero supplied test records at one hundred fifty pixels per item. They organize what a forming explanation would need, but the page gives no measurements or experimental result. Clicking a lens selects its fixed text and diagram label. The label input, process, measure is a conceptual sequence, not actual instrumentation or a completed validation. Export records five fields: selected mode, title, explanation, process question and evidence boundary. Bars compare five document fields with one saved question at eighty pixels per item. Every lens click and note input saves locally. Reload restores both selected mode and exact note, including spaces. Reset returns to the sag lens, clears the note and removes storage. The original status resets to source bounded after reload even when saved state is restored. Nothing is transmitted and no model or forming machinery is invoked.