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use bevy::window::WindowResolution;
use bevy::{
color::palettes::css::{CORNFLOWER_BLUE, TOMATO, WHITE},
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::{
material::PointsShaderSettings, mesh::PointsMesh, plugin::PointsPlugin, prelude::PointsMaterial,
};
use itertools::Itertools;
use misc::surface_2_mesh;
use nalgebra::{Matrix4, Point4, Vector3};
use curvo::prelude::*;
mod materials;
mod misc;
use materials::*;
use rand::RngExt;
use crate::misc::{add_curve, add_regular_curve};
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);
}
}
#[derive(Component)]
struct IntersectionSurface(pub NurbsSurface3D<f64>);
#[derive(Component)]
struct IntersectionPlane(pub Plane<f64>);
fn setup(
mut commands: Commands,
mut meshes: ResMut<Assets<Mesh>>,
mut normal_materials: ResMut<Assets<NormalMaterial>>,
mut line_materials: ResMut<Assets<LineMaterial>>,
mut standard_materials: ResMut<Assets<StandardMaterial>>,
mut points_materials: ResMut<Assets<PointsMaterial>>,
) {
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))),
MeshMaterial3d(normal_materials.add(NormalMaterial {
opacity: 0.35,
cull_mode: None,
alpha_mode: AlphaMode::Blend,
..Default::default()
})),
Transform::default(),
IntersectionSurface(surface.clone()),
// Visibility::Hidden,
));
let plane = Plane::new(Vector3::y(), 0.0);
let dir = plane.normal().cast::<f32>();
let size = 8.;
// ground plane
commands.spawn((
Mesh3d(
meshes.add(
Plane3d {
normal: Dir3::new(Vec3::from(dir)).unwrap(),
half_size: Vec2::new(50.0, 50.0),
}
.mesh()
.size(size, size)
.subdivisions(2),
),
),
Transform::from_translation((dir * (-plane.constant() as f32)).into()),
MeshMaterial3d(standard_materials.add(StandardMaterial {
base_color: Color::from(CORNFLOWER_BLUE).with_alpha(0.25),
unlit: true,
alpha_mode: AlphaMode::Blend,
cull_mode: None,
..Default::default()
})),
IntersectionPlane(plane.clone()),
// Visibility::Hidden,
));
/*
let ta = SurfaceBoundingBoxTree::new(&surface, UVDirection::U, None);
let leaf_nodes = ta.traverse_leaf_nodes_with_plane(&plane);
for node in leaf_nodes {
let s = node.surface_owned();
commands.spawn((
Mesh3d(meshes.add(surface_2_mesh(&s, None))),
MeshMaterial3d(normal_materials.add(NormalMaterial {
opacity: 0.85,
cull_mode: None,
alpha_mode: AlphaMode::Blend,
..Default::default()
})),
));
}
*/
let tess = surface.tessellate(Some(
AdaptiveTessellationOptions::<_>::default().with_norm_tolerance(1e-3),
));
let its = tess.find_intersection(&plane, ());
if let Ok(its) = its {
its.polylines.iter().for_each(|polyline| {
let n = polyline.len() as f32;
let line = Mesh::new(PrimitiveTopology::LineStrip, default())
.with_inserted_attribute(
Mesh::ATTRIBUTE_POSITION,
VertexAttributeValues::Float32x3(
polyline
.iter()
.map(|it| it.cast::<f32>().into())
.collect_vec(),
),
)
.with_inserted_attribute(
Mesh::ATTRIBUTE_COLOR,
VertexAttributeValues::Float32x4(
polyline
.iter()
.enumerate()
.map(|(i, _)| {
let t = i as f32 / n;
let hue = t * 360.;
let c = Color::hsl(hue, 0.5, 0.5);
c.to_srgba().to_f32_array()
})
.collect_vec(),
),
);
commands.spawn((
Mesh3d(meshes.add(line)),
MeshMaterial3d(line_materials.add(LineMaterial {
color: Color::WHITE,
..Default::default()
})),
));
});
}
/*
let its = surface.find_intersection(&plane, None);
match its {
Ok(its) => {
its.iter().for_each(|curve| {
let degree = curve.degree();
match degree {
1 => {
let pts = curve.dehomogenized_control_points();
let n = pts.len() as f32;
commands.spawn((
Mesh3d(
meshes.add(PointsMesh {
vertices: pts
.iter()
.map(|it| Vec3::from(it.cast::<f32>()))
.collect(),
colors: Some(
pts.iter()
.enumerate()
.map(|(i, _)| {
let t = i as f32 / n;
let hue = t * 360.;
let c = Color::hsl(hue, 0.5, 0.5);
c
})
.collect_vec(),
),
}),
),
MeshMaterial3d(points_materials.add(PointsMaterial {
settings: PointsShaderSettings {
point_size: 0.025,
color: WHITE.into(),
..Default::default()
},
circle: true,
..Default::default()
})),
// Visibility::Hidden
));
}
_ => {}
};
add_curve(
curve,
if degree <= 1 {
Some(TOMATO.into())
} else {
Some(Color::WHITE)
},
None,
&mut commands,
&mut meshes,
&mut line_materials,
);
});
}
Err(e) => {
println!("error: {:?}", e);
}
}
*/
/*
let its = find_surface_plane_intersection_points(&surface, &plane, None);
if let Ok(its) = its {
commands.spawn((
Mesh3d(meshes.add(PointsMesh::from_iter(
its.iter().map(|it| Vec3::from(it.0.cast::<f32>())),
))),
MeshMaterial3d(points_materials.add(PointsMaterial {
settings: PointsShaderSettings {
point_size: 0.025,
color: WHITE.into(),
..Default::default()
},
circle: true,
..Default::default()
})),
// Visibility::Hidden
));
}
*/
/*
let its = surface.find_intersection(&plane, None);
if let Ok(its) = its {
its.iter().for_each(|curve| {
add_curve(
curve,
Some(Color::WHITE),
None,
&mut commands,
&mut meshes,
&mut line_materials,
);
});
}
*/
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()
});
}