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use crate::buffer::CellGrid;
#[derive(Debug, Clone, PartialEq, Copy)]
pub enum Direction {
TopLeft,
Top,
TopRight,
Left,
Right,
BottomLeft,
Bottom,
BottomRight,
}
impl Direction {
/// return the opposite direction of self
pub(crate) fn opposite(&self) -> Self {
match self {
Direction::TopLeft => Direction::BottomRight,
Direction::Top => Direction::Bottom,
Direction::TopRight => Direction::BottomLeft,
Direction::Left => Direction::Right,
Direction::Right => Direction::Left,
Direction::BottomLeft => Direction::TopRight,
Direction::Bottom => Direction::Top,
Direction::BottomRight => Direction::TopLeft,
}
}
/*
pub(crate) fn any_along_side(&self, tags: &[PolygonTag]) -> bool {
tags.iter().any(|tag| self.is_along_side(tag))
}
/// diamon matches alongside for everything.
pub(crate) fn is_along_side(&self, tag: &PolygonTag) -> bool {
if *tag == PolygonTag::DiamondBullet {
return true;
}
match self {
Direction::TopLeft | Direction::BottomRight => match tag {
PolygonTag::ArrowTopLeft
| PolygonTag::ArrowBottomRight
| PolygonTag::ArrowTop
| PolygonTag::ArrowBottom => true,
_ => false,
},
Direction::Top | Direction::Bottom => match tag {
PolygonTag::ArrowTop | PolygonTag::ArrowBottom => true,
_ => false,
},
Direction::TopRight | Direction::BottomLeft => match tag {
PolygonTag::ArrowTopRight
| PolygonTag::ArrowBottomLeft
| PolygonTag::ArrowTop
| PolygonTag::ArrowBottom => true,
_ => false,
},
Direction::Left | Direction::Right => match tag {
PolygonTag::ArrowLeft | PolygonTag::ArrowRight => true,
_ => false,
},
}
}
*/
/// calculate the threshold length which is the basis
/// if the arrow and the line is connected
pub(crate) fn threshold_length(&self) -> f32 {
match self {
Direction::TopLeft
| Direction::TopRight
| Direction::BottomLeft
| Direction::BottomRight => CellGrid::diagonal_length(),
Direction::Left | Direction::Right => CellGrid::width(),
Direction::Top | Direction::Bottom => CellGrid::height(),
}
}
}
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