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iter_simple_wide.rs
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iter_simple_wide.rs
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use bevy_ecs::prelude::*;
use glam::*;
#[derive(Component, Copy, Clone)]
struct Transform(Mat4);
#[derive(Component, Copy, Clone)]
struct Position<const X: usize>(Vec3);
#[derive(Component, Copy, Clone)]
struct Rotation(Vec3);
#[derive(Component, Copy, Clone)]
struct Velocity<const X: usize>(Vec3);
pub struct Benchmark<'w>(
World,
QueryState<(
&'w Velocity<0>,
&'w mut Position<0>,
&'w Velocity<1>,
&'w mut Position<1>,
&'w Velocity<2>,
&'w mut Position<2>,
&'w Velocity<3>,
&'w mut Position<3>,
&'w Velocity<4>,
&'w mut Position<4>,
)>,
);
impl<'w> Benchmark<'w> {
pub fn new() -> Self {
let mut world = World::new();
// TODO: batch this
for _ in 0..10_000 {
world.spawn((
Transform(Mat4::from_scale(Vec3::ONE)),
Rotation(Vec3::X),
Position::<0>(Vec3::X),
Velocity::<0>(Vec3::X),
Position::<1>(Vec3::X),
Velocity::<1>(Vec3::X),
Position::<2>(Vec3::X),
Velocity::<2>(Vec3::X),
Position::<3>(Vec3::X),
Velocity::<3>(Vec3::X),
Position::<4>(Vec3::X),
Velocity::<4>(Vec3::X),
));
}
let query = world.query();
Self(world, query)
}
pub fn run(&mut self) {
for mut item in self.1.iter_mut(&mut self.0) {
item.1 .0 += item.0 .0;
item.3 .0 += item.2 .0;
item.5 .0 += item.4 .0;
item.7 .0 += item.6 .0;
}
}
}