forked from 1b-agent/fieldcraft-upstream
jyvikoandClaude Opus 5.5
93f1a03137
glyphs::Glyphs picks where a model's setup symbols go (resolving its sets once, thinning them on a grid, capping each definition and sampling large ones with a note) and draws them into a Scene at the nodes' current positions: cones for constrained translations (and rotations where nodes rotate), arrows for forces, double-headed arrows for moments, arrows normal to pressure faces, one arrow for gravity and body forces, a curved arrow for centrifugal loads, crosses with names for reference points, lines for couplings, hatched squares for rigid walls. Colours come from the caller by role, muted over results. Scene gains labels, drawn by the CPU rasterizer with a small bitmap font of its own. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm
87 lines
4.1 KiB
Rust
87 lines
4.1 KiB
Rust
//! A small bitmap font for labels in headless pictures (the CPU rasterizer has no text
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//! otherwise): capitals, digits and a few marks on a 5 × 7 grid, drawn for FieldCraft. Lower case
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//! is drawn in capitals; anything else is a question mark.
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/// Glyph width and height in font pixels, and the advance between glyphs.
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pub const W: usize = 5;
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pub const H: usize = 7;
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pub const ADVANCE: usize = 6;
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/// The rows of a character, top first, the leftmost pixel in bit 4.
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pub fn rows(c: char) -> [u8; H] {
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match c.to_ascii_uppercase() {
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'A' => [0x0e, 0x11, 0x11, 0x1f, 0x11, 0x11, 0x11],
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'B' => [0x1e, 0x11, 0x11, 0x1e, 0x11, 0x11, 0x1e],
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'C' => [0x0e, 0x11, 0x10, 0x10, 0x10, 0x11, 0x0e],
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'D' => [0x1e, 0x11, 0x11, 0x11, 0x11, 0x11, 0x1e],
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'E' => [0x1f, 0x10, 0x10, 0x1e, 0x10, 0x10, 0x1f],
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'F' => [0x1f, 0x10, 0x10, 0x1e, 0x10, 0x10, 0x10],
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'G' => [0x0e, 0x11, 0x10, 0x17, 0x11, 0x11, 0x0f],
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'H' => [0x11, 0x11, 0x11, 0x1f, 0x11, 0x11, 0x11],
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'I' => [0x0e, 0x04, 0x04, 0x04, 0x04, 0x04, 0x0e],
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'J' => [0x07, 0x02, 0x02, 0x02, 0x02, 0x12, 0x0c],
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'K' => [0x11, 0x12, 0x14, 0x18, 0x14, 0x12, 0x11],
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'L' => [0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x1f],
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'M' => [0x11, 0x1b, 0x15, 0x15, 0x11, 0x11, 0x11],
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'N' => [0x11, 0x11, 0x19, 0x15, 0x13, 0x11, 0x11],
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'O' => [0x0e, 0x11, 0x11, 0x11, 0x11, 0x11, 0x0e],
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'P' => [0x1e, 0x11, 0x11, 0x1e, 0x10, 0x10, 0x10],
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'Q' => [0x0e, 0x11, 0x11, 0x11, 0x15, 0x12, 0x0d],
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'R' => [0x1e, 0x11, 0x11, 0x1e, 0x14, 0x12, 0x11],
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'S' => [0x0f, 0x10, 0x10, 0x0e, 0x01, 0x01, 0x1e],
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'T' => [0x1f, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04],
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'U' => [0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x0e],
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'V' => [0x11, 0x11, 0x11, 0x11, 0x11, 0x0a, 0x04],
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'W' => [0x11, 0x11, 0x11, 0x15, 0x15, 0x15, 0x0a],
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'X' => [0x11, 0x11, 0x0a, 0x04, 0x0a, 0x11, 0x11],
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'Y' => [0x11, 0x11, 0x0a, 0x04, 0x04, 0x04, 0x04],
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'Z' => [0x1f, 0x01, 0x02, 0x04, 0x08, 0x10, 0x1f],
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'0' => [0x0e, 0x11, 0x13, 0x15, 0x19, 0x11, 0x0e],
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'1' => [0x04, 0x0c, 0x04, 0x04, 0x04, 0x04, 0x0e],
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'2' => [0x0e, 0x11, 0x01, 0x02, 0x04, 0x08, 0x1f],
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'3' => [0x1f, 0x02, 0x04, 0x02, 0x01, 0x11, 0x0e],
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'4' => [0x02, 0x06, 0x0a, 0x12, 0x1f, 0x02, 0x02],
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'5' => [0x1f, 0x10, 0x1e, 0x01, 0x01, 0x11, 0x0e],
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'6' => [0x06, 0x08, 0x10, 0x1e, 0x11, 0x11, 0x0e],
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'7' => [0x1f, 0x01, 0x02, 0x04, 0x08, 0x08, 0x08],
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'8' => [0x0e, 0x11, 0x11, 0x0e, 0x11, 0x11, 0x0e],
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'9' => [0x0e, 0x11, 0x11, 0x0f, 0x01, 0x02, 0x0c],
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' ' => [0; H],
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'-' => [0x00, 0x00, 0x00, 0x1f, 0x00, 0x00, 0x00],
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'_' => [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f],
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'.' => [0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0x0c],
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',' => [0x00, 0x00, 0x00, 0x00, 0x0c, 0x04, 0x08],
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':' => [0x00, 0x0c, 0x0c, 0x00, 0x0c, 0x0c, 0x00],
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'(' => [0x02, 0x04, 0x08, 0x08, 0x08, 0x04, 0x02],
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')' => [0x08, 0x04, 0x02, 0x02, 0x02, 0x04, 0x08],
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'/' => [0x01, 0x01, 0x02, 0x04, 0x08, 0x10, 0x10],
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'+' => [0x00, 0x04, 0x04, 0x1f, 0x04, 0x04, 0x00],
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'#' => [0x0a, 0x0a, 0x1f, 0x0a, 0x1f, 0x0a, 0x0a],
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_ => [0x0e, 0x11, 0x01, 0x02, 0x04, 0x00, 0x04],
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}
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}
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/// Whether font pixel (`x`, `y`) of `c` is set.
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pub fn on(c: char, x: usize, y: usize) -> bool {
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x < W && rows(c).get(y).is_some_and(|r| r & (0x10 >> x) != 0)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn characters_are_distinct_and_lower_case_draws_capitals() {
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let set: Vec<char> = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.,:()/+#".chars().collect();
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for (i, a) in set.iter().enumerate() {
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assert!(rows(*a).iter().all(|r| *r < 0x20), "{a}");
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for b in set.iter().skip(i + 1) {
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assert_ne!(rows(*a), rows(*b), "{a} and {b}");
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}
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}
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assert_eq!(rows('r'), rows('R'));
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assert_eq!(rows('é'), rows('?'));
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assert!(on('L', 0, 6) && !on('L', 4, 0) && !on('L', 9, 0) && !on('L', 0, 9));
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}
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}
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