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use glam::DVec2;
#[derive(Clone, Copy, Debug, PartialEq)]
pub(crate) struct Aabb {
pub top: f64,
pub right: f64,
pub bottom: f64,
pub left: f64,
}
pub(crate) fn bounding_boxes_overlap(a: &Aabb, b: &Aabb) -> bool {
a.left <= b.right && b.left <= a.right && a.top <= b.bottom && b.top <= a.bottom
}
pub(crate) fn merge_bounding_boxes(a: Option<Aabb>, b: &Aabb) -> Aabb {
match a {
Some(a) => Aabb {
top: a.top.min(b.top),
right: a.right.max(b.right),
bottom: a.bottom.max(b.bottom),
left: a.left.min(b.left),
},
None => *b,
}
}
pub(crate) fn extend_bounding_box(bounding_box: Option<Aabb>, point: DVec2) -> Aabb {
match bounding_box {
Some(bb) => Aabb {
top: bb.top.min(point.y),
right: bb.right.max(point.x),
bottom: bb.bottom.max(point.y),
left: bb.left.min(point.x),
},
None => Aabb {
top: point.y,
right: point.x,
bottom: point.y,
left: point.x,
},
}
}
pub(crate) fn bounding_box_max_extent(bounding_box: &Aabb) -> f64 {
(bounding_box.right - bounding_box.left).max(bounding_box.bottom - bounding_box.top)
}
pub(crate) fn bounding_box_around_point(point: DVec2, padding: f64) -> Aabb {
Aabb {
top: point.y - padding,
right: point.x + padding,
bottom: point.y + padding,
left: point.x - padding,
}
}
pub(crate) fn expand_bounding_box(bounding_box: &Aabb, padding: f64) -> Aabb {
Aabb {
top: bounding_box.top - padding,
right: bounding_box.right + padding,
bottom: bounding_box.bottom + padding,
left: bounding_box.left - padding,
}
}
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