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use bevy::window::WindowResolution;
use bevy::{
color::palettes::css::TOMATO,
mesh::{PrimitiveTopology, VertexAttributeValues},
prelude::*,
};
use bevy_infinite_grid::{InfiniteGridBundle, InfiniteGridPlugin, InfiniteGridSettings};
use bevy_normal_material::{plugin::NormalMaterialPlugin, prelude::NormalMaterial};
use bevy_panorbit_camera::{PanOrbitCamera, PanOrbitCameraPlugin};
use bevy_points::{plugin::PointsPlugin, prelude::PointsMaterial};
use itertools::Itertools;
use misc::surface_2_mesh;
use nalgebra::{Matrix4, Point3, Point4, Vector3};
use curvo::prelude::*;
mod materials;
mod misc;
use materials::*;
use rand::RngExt;
fn main() {
App::new()
.add_plugins(DefaultPlugins.set(WindowPlugin {
primary_window: Some(Window {
resolution: WindowResolution::new(640, 480),
..Default::default()
}),
..Default::default()
}))
.add_plugins(NormalMaterialPlugin)
.add_plugins(LineMaterialPlugin)
.add_plugins(InfiniteGridPlugin)
.add_plugins(PanOrbitCameraPlugin)
.add_plugins(PointsPlugin)
.add_plugins(AppPlugin)
.run();
}
struct AppPlugin;
impl Plugin for AppPlugin {
fn build(&self, app: &mut bevy::prelude::App) {
app.add_systems(Startup, setup).add_systems(Update, update);
}
}
#[derive(Component)]
struct IntersectionSurface(pub NurbsSurface3D<f64>);
#[derive(Component)]
struct IntersectionCurve(pub NurbsCurve3D<f64>);
fn setup(
mut commands: Commands,
mut meshes: ResMut<Assets<Mesh>>,
mut normal_materials: ResMut<Assets<NormalMaterial>>,
mut line_materials: ResMut<Assets<LineMaterial>>,
_points_materials: ResMut<Assets<PointsMaterial>>,
) {
let profile =
NurbsCurve3D::polyline(&[Point3::new(-2., 0., -2.), Point3::new(2., 0., -2.)], true);
let _surface = NurbsSurface::extrude(&profile, &(Vector3::z() * 4.));
let degree = 3;
let n: usize = 6;
let goal = n + degree + 1;
let knots = KnotVector::uniform(goal - degree * 2, degree);
let hn = (n - 1) as f64 / 2.;
let mut rng: rand::rngs::StdRng = rand::SeedableRng::from_seed([0; 32]);
let pts = (0..n)
.map(|i| {
(0..n)
.map(|j| {
let x = i as f64 - hn;
let y = (rng.random::<f64>() - 0.5) * 2.;
let z = (j as f64) - hn;
Point4::new(x, y, z, 1.)
})
.collect_vec()
})
.collect_vec();
let surface = NurbsSurface3D::new(degree, degree, knots.to_vec(), knots.to_vec(), pts);
commands.spawn((
Mesh3d(meshes.add(surface_2_mesh(&surface, None))),
// Mesh3d(meshes.add(surface_2_regular_mesh(&surface, 64, 64))),
MeshMaterial3d(normal_materials.add(NormalMaterial {
opacity: 0.35,
cull_mode: None,
alpha_mode: AlphaMode::Blend,
..Default::default()
})),
IntersectionSurface(surface.clone()),
));
let curve =
NurbsCurve3D::try_circle(&Point3::new(0., 0., 0.), &Vector3::x(), &Vector3::y(), 1.)
.unwrap();
let line_vertices = curve
.tessellate(Some(1e-8))
.iter()
.map(|p| p.cast::<f32>())
.map(|p| [p.x, p.y, 0.])
.collect();
let line = Mesh::new(PrimitiveTopology::LineStrip, default()).with_inserted_attribute(
Mesh::ATTRIBUTE_POSITION,
VertexAttributeValues::Float32x3(line_vertices),
);
commands.spawn((
Mesh3d(meshes.add(line)),
MeshMaterial3d(line_materials.add(LineMaterial {
color: TOMATO.into(),
..Default::default()
})),
IntersectionCurve(curve.clone()),
));
/*
let ta = SurfaceBoundingBoxTree::new(&surface, UVDirection::U, None);
let tb = CurveBoundingBoxTree::new(&circle, None);
let traversed = BoundingBoxTraversal::try_traverse(ta, tb);
if let Ok(traversed) = traversed {
let n = traversed.pairs_iter().count();
traversed
.pairs_iter()
.enumerate()
.for_each(|(idx, (a, b))| {
let t = (idx as f32) / (n as f32);
let hue = t * 360. * 1e2 % 360.;
let color = Color::hsl(hue, 0.5, 0.5);
let b0 = a.bounding_box();
let b1 = b.bounding_box();
let vertices = b0
.lines()
.iter()
.chain(b1.lines().iter())
.flat_map(|(a, b)| {
[a, b]
.iter()
.map(|p| p.cast::<f32>())
.map(|p| [p.x, p.y, 0.])
.collect::<Vec<_>>()
})
.collect();
let line = Mesh::new(PrimitiveTopology::LineList, default())
.with_inserted_attribute(
Mesh::ATTRIBUTE_POSITION,
VertexAttributeValues::Float32x3(vertices),
);
commands
.spawn((
Mesh3d(meshes.add(line)),
MeshMaterial3d(line_materials.add(LineMaterial {
// color: Color::WHITE,
color,
opacity: 0.5,
alpha_mode: AlphaMode::Blend,
})),
))
.insert(Name::new("bounding box"));
});
}
*/
/*
let intersections = surface.find_intersection(&circle, None);
if let Ok(intersections) = intersections {
commands.spawn((
Mesh3d(
meshes.add(PointsMesh::from_iter(intersections.iter().flat_map(|it| {
[
Vec3::from(it.a().0.cast::<f32>()),
Vec3::from(it.b().0.cast::<f32>()),
]
}))),
),
MeshMaterial3d(points_materials.add(PointsMaterial {
settings: PointsShaderSettings {
point_size: 0.025,
color: WHITE.into(),
..Default::default()
},
circle: true,
..Default::default()
})),
));
}
*/
let center = Vec3::ZERO;
commands.spawn((
Transform::from_translation(center + Vec3::new(3., 3., 3.)).looking_at(center, Vec3::Y),
PanOrbitCamera::default(),
));
commands.spawn(InfiniteGridBundle {
settings: InfiniteGridSettings {
x_axis_color: Color::BLACK,
z_axis_color: Color::BLACK,
..Default::default()
},
..Default::default()
});
}
#[allow(clippy::type_complexity)]
fn update(
time: Res<Time>,
mut set: ParamSet<(
Query<&Transform, With<Camera>>,
Query<(&IntersectionSurface, &mut Transform), With<IntersectionSurface>>,
Query<(&IntersectionCurve, &mut Transform), With<IntersectionCurve>>,
)>,
mut gizmos: Gizmos,
) {
let speed = 1.0;
let elapsed = time.elapsed_secs() * speed;
let delta = time.delta_secs() * speed;
set.p1().iter_mut().for_each(|(_, mut tr1)| {
tr1.rotate_local_z(-delta * 0.25);
});
set.p2().iter_mut().for_each(|(_, mut tr2)| {
let x = elapsed.cos() * 1.5;
let y = elapsed.sin() * 1.5;
*tr2 = tr2.with_translation(Vec3::new(x, y, 0.));
tr2.rotate_local_x(delta * 1.0);
});
let transformed_surface = set
.p1()
.iter()
.map(|(s, tr)| {
let mat = tr.to_matrix();
let m = Matrix4::from(mat);
s.0.transformed(&m.cast::<f64>())
})
.next()
.unwrap();
let transformed_curve = set
.p2()
.iter()
.map(|(c2, tr)| {
let mat = tr.to_matrix();
let m = Matrix4::from(mat);
c2.0.transformed(&m.cast::<f64>())
})
.next()
.unwrap();
/*
let traversed = BoundingBoxTraversal::try_traverse(&c1, &c2, None, None);
if let Ok(traversed) = traversed {
let n = traversed.pairs_iter().count();
traversed
.pairs_iter()
.enumerate()
.for_each(|(idx, (a, b))| {
let t = (idx as f32) / (n as f32);
let hue = t * 360. * 1e2 % 360.;
let b0 = a.bounding_box();
let b1 = b.bounding_box();
let color = Color::hsla(hue, 0.5, 0.5, 0.45);
/*
gizmos.cuboid(
Transform::from_translation(b0.center().to_homogeneous().cast::<f32>().into())
.with_scale(b0.size().to_homogeneous().cast::<f32>().into()),
color,
);
*/
gizmos.cuboid(
Transform::from_translation(b1.center().to_homogeneous().cast::<f32>().into())
.with_scale(b1.size().to_homogeneous().cast::<f32>().into()),
// color,
Color::GRAY.with_a(0.75),
);
});
}
*/
let p0 = set.p0();
let camera_position = p0.single().unwrap().translation;
let intersections = transformed_surface.find_intersection(&transformed_curve, None);
if let Ok(intersections) = intersections {
intersections.iter().for_each(|it| {
let p: Vec3 = it.a().0.cast::<f32>().into();
let normal = (camera_position - p).normalize();
let _dir = Dir3::new_unchecked(normal);
gizmos.circle(p, 1e-2 * 2.5, Color::WHITE);
});
}
}