#[repr(u8)]
pub enum Primitive {
PointList,
LineList,
LineStrip,
TriangleList,
TriangleStrip,
LineListAdjacency,
LineStripAdjacency,
TriangleListAdjacency,
TriangleStripAdjacency,
PatchList(PatchSize),
}
Expand description
Describes the type of geometric primitives, created from vertex data.
Variants
PointList
Each vertex represents a single point.
LineList
Each pair of vertices represent a single line segment. For example, with [a, b, c, d, e]
, a
and b
form a line, c
and d
form a line, and e
is discarded.
LineStrip
Every two consecutive vertices represent a single line segment. Visually forms a “path” of
lines, as they are all connected. For example, with [a, b, c]
, a
and b
form a line
line, and b
and c
form a line.
TriangleList
Each triplet of vertices represent a single triangle. For example, with [a, b, c, d, e]
,
a
, b
, and c
form a triangle, d
and e
are discarded.
TriangleStrip
Every three consecutive vertices represent a single triangle. For example, with [a, b, c, d]
, a
, b
, and c
form a triangle, and b
, c
, and d
form a triangle.
LineListAdjacency
Each quadtruplet of vertices represent a single line segment with adjacency information.
For example, with [a, b, c, d]
, b
and c
form a line, and a
and d
are the adjacent
vertices.
LineStripAdjacency
Every four consecutive vertices represent a single line segment with adjacency information.
For example, with [a, b, c, d, e]
, [a, b, c, d]
form a line segment with adjacency, and
[b, c, d, e]
form a line segment with adjacency.
TriangleListAdjacency
Each sextuplet of vertices represent a single triangle with adjacency information. For
example, with [a, b, c, d, e, f]
, a
, c
, and e
form a triangle, and b
, d
, and
f
are the adjacent vertices, where b
is adjacent to the edge formed by a
and c
, d
is adjacent to the edge c
and e
, and f
is adjacent to the edge e
and a
.
TriangleStripAdjacency
Every even-numbered vertex (every other starting from the first) represents an additional
vertex for the triangle strip, while odd-numbered vertices (every other starting from the
second) represent adjacent vertices. For example, with [a, b, c, d, e, f, g, h]
, [a, c, e, g]
form a triangle strip, and [b, d, f, h]
are the adjacent vertices, where b
, d
,
and f
are adjacent to the first triangle in the strip, and d
, f
, and h
are adjacent
to the second.
PatchList(PatchSize)
Patch list, used with shaders capable of producing primitives on their own (tessellation)
Trait Implementations
sourceimpl Ord for Primitive
impl Ord for Primitive
1.21.0 · sourcefn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
1.21.0 · sourcefn min(self, other: Self) -> Selfwhere
Self: Sized,
fn min(self, other: Self) -> Selfwhere
Self: Sized,
1.50.0 · sourcefn clamp(self, min: Self, max: Self) -> Selfwhere
Self: Sized + PartialOrd<Self>,
fn clamp(self, min: Self, max: Self) -> Selfwhere
Self: Sized + PartialOrd<Self>,
sourceimpl PartialOrd<Primitive> for Primitive
impl PartialOrd<Primitive> for Primitive
sourcefn partial_cmp(&self, other: &Primitive) -> Option<Ordering>
fn partial_cmp(&self, other: &Primitive) -> Option<Ordering>
1.0.0 · sourcefn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read more