Enum Side
pub enum Side {
Positive,
Negative,
}
Expand description
The positive or negative side of a vector or segment.
Given a reference vector v0
, a vector v1
is on the positive side
if the sign of the cross product v0 x v1
is positive.
This type does not use the left/right terminology to avoid confusion with left-handed / right-handed coordinate systems. Right-handed coordinate systems seem to be what a lot of people are most familiar with (especially in 2D), however most vector graphics specifications use y-down left-handed coordinate systems. Unfortunately mirroring the y axis inverts the meaning of “left” and “right”, which causes confusion. In practice:
- In a y-down left-handed coordinate system such as
SVG
’s,Side::Positive
is the right side. - In a y-up right-handed coordinate system,
Side::Positive
is the left side.
Variants§
Implementations§
§impl Side
impl Side
pub fn opposite(self) -> Side
pub fn is_positive(self) -> bool
pub fn is_negative(self) -> bool
pub fn to_f32(self) -> f32
Trait Implementations§
impl Copy for Side
impl StructuralPartialEq for Side
Auto Trait Implementations§
impl Freeze for Side
impl RefUnwindSafe for Side
impl Send for Side
impl Sync for Side
impl Unpin for Side
impl UnwindSafe for Side
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T: ?Sized,
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T: ?Sized,
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