diff options
Diffstat (limited to 'packages/svgbob/src/buffer/cell_buffer/cell/cell_grid.rs')
| -rw-r--r-- | packages/svgbob/src/buffer/cell_buffer/cell/cell_grid.rs | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/packages/svgbob/src/buffer/cell_buffer/cell/cell_grid.rs b/packages/svgbob/src/buffer/cell_buffer/cell/cell_grid.rs new file mode 100644 index 0000000..0e6f25a --- /dev/null +++ b/packages/svgbob/src/buffer/cell_buffer/cell/cell_grid.rs @@ -0,0 +1,214 @@ +use crate::Point; + +/// 4x8 - 32 subcells +/// +/// with 5x9 = 45 intersections +/// +/// ```ignore +/// 0 1 2 3 4 B C D +/// 0┌─┬─┬─┬─┐ A┌─┬─┬─┬─┐E +/// 1├─┼─┼─┼─┤ │ │ │ │ │ +/// 2├─┼─┼─┼─┤ F├─G─H─I─┤J +/// 3├─┼─┼─┼─┤ │ │ │ │ │ +/// 4├─┼─┼─┼─┤ K├─L─M─N─┤O +/// 5├─┼─┼─┼─┤ │ │ │ │ │ +/// 6├─┼─┼─┼─┤ P├─Q─R─S─┤T +/// 7├─┼─┼─┼─┤ │ │ │ │ │ +/// 8└─┴─┴─┴─┘ U└─┴─┴─┴─┘Y +/// ``` V W X +pub struct CellGrid {} + +impl CellGrid { + /// get the point intersection at x, y + #[inline] + pub fn point(x: usize, y: usize) -> Point { + let px = x as f32 * Self::unit_x(); + let py = y as f32 * Self::unit_y(); + Point::new(px, py) + } + + #[inline] + pub fn a() -> Point { + Self::point(0, 0) + } + + #[inline] + pub fn b() -> Point { + Self::point(1, 0) + } + + #[inline] + pub fn c() -> Point { + Self::point(2, 0) + } + + #[inline] + pub fn d() -> Point { + Self::point(3, 0) + } + + #[inline] + pub fn e() -> Point { + Self::point(4, 0) + } + + #[inline] + pub fn f() -> Point { + Self::point(0, 2) + } + + #[inline] + pub fn g() -> Point { + Self::point(1, 2) + } + + #[inline] + pub fn h() -> Point { + Self::point(2, 2) + } + + #[inline] + pub fn i() -> Point { + Self::point(3, 2) + } + + #[inline] + pub fn j() -> Point { + Self::point(4, 2) + } + + #[inline] + pub fn k() -> Point { + Self::point(0, 4) + } + + #[inline] + pub fn l() -> Point { + Self::point(1, 4) + } + + #[inline] + pub fn m() -> Point { + Self::point(2, 4) + } + + #[inline] + pub fn n() -> Point { + Self::point(3, 4) + } + + #[inline] + pub fn o() -> Point { + Self::point(4, 4) + } + + #[inline] + pub fn p() -> Point { + Self::point(0, 6) + } + + #[inline] + pub fn q() -> Point { + Self::point(1, 6) + } + + #[inline] + pub fn r() -> Point { + Self::point(2, 6) + } + + #[inline] + pub fn s() -> Point { + Self::point(3, 6) + } + + #[inline] + pub fn t() -> Point { + Self::point(4, 6) + } + + #[inline] + pub fn u() -> Point { + Self::point(0, 8) + } + + #[inline] + pub fn v() -> Point { + Self::point(1, 8) + } + + #[inline] + pub fn w() -> Point { + Self::point(2, 8) + } + + #[inline] + pub fn x() -> Point { + Self::point(3, 8) + } + + #[inline] + pub fn y() -> Point { + Self::point(4, 8) + } + + //TODO: use proper aspect ratio for width + //and height based on the text rendering + #[inline] + pub fn width() -> f32 { + 1.0 + } + + //TODO: use proper aspect ratio for width + //and height based on the text rendering + #[inline] + pub fn height() -> f32 { + 2.0 + } + + /// 0.25 + #[inline] + pub fn unit_x() -> f32 { + Self::width() / Self::horizontal_slices() as f32 + } + + /// 0.25 + #[inline] + pub fn unit_y() -> f32 { + Self::height() / Self::vertical_slices() as f32 + } + + #[inline] + fn vertical_slices() -> usize { + 8 + } + + #[inline] + fn horizontal_slices() -> usize { + 4 + } + + pub fn diagonal_length() -> f32 { + let w = Self::width(); + let h = Self::height(); + (w * w + h * h).sqrt() + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn test_grid() { + assert_eq!(Point::new(0.0, 0.0), CellGrid::a()); + assert_eq!(Point::new(1.0, 2.0), CellGrid::y()); + assert_eq!(Point::new(0.0, 1.0), CellGrid::k()); + assert_eq!(Point::new(1.0, 1.0), CellGrid::o()); + } + + #[test] + fn test_diagonal_length() { + assert_eq!(CellGrid::diagonal_length(), 2.236068); + } +} |