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Merge pull request #42 from mattatz/constrained-surface-tessellation
0.1.43
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,205 @@ | ||
| use std::f64::consts::FRAC_PI_2; | ||
|
|
||
| use bevy::{ | ||
| color::palettes::css::{RED, TOMATO}, | ||
| prelude::*, | ||
| render::{ | ||
| camera::ScalingMode, | ||
| mesh::{Indices, PrimitiveTopology, VertexAttributeValues}, | ||
| }, | ||
| }; | ||
| use bevy_infinite_grid::InfiniteGridPlugin; | ||
|
|
||
| use bevy_normal_material::{material::NormalMaterial, plugin::NormalMaterialPlugin}; | ||
| use bevy_panorbit_camera::{PanOrbitCamera, PanOrbitCameraPlugin}; | ||
| use bevy_points::{ | ||
| material::PointsShaderSettings, mesh::PointsMesh, plugin::PointsPlugin, prelude::PointsMaterial, | ||
| }; | ||
| use itertools::Itertools; | ||
| use materials::*; | ||
| use misc::{add_surface, add_surface_normals}; | ||
| use nalgebra::{Point3, Rotation3, Translation3, Vector3}; | ||
|
|
||
| use curvo::prelude::*; | ||
| mod materials; | ||
| mod misc; | ||
|
|
||
| fn main() { | ||
| App::new() | ||
| .add_plugins(DefaultPlugins) | ||
| .add_plugins(LineMaterialPlugin) | ||
| .add_plugins(InfiniteGridPlugin) | ||
| .add_plugins(PanOrbitCameraPlugin) | ||
| .add_plugins(PointsPlugin) | ||
| .add_plugins(NormalMaterialPlugin) | ||
| .add_plugins(AppPlugin) | ||
| .run(); | ||
| } | ||
| struct AppPlugin; | ||
|
|
||
| impl Plugin for AppPlugin { | ||
| fn build(&self, app: &mut bevy::prelude::App) { | ||
| app.add_systems(Startup, setup); | ||
| } | ||
| } | ||
|
|
||
| fn setup( | ||
| mut commands: Commands, | ||
| mut meshes: ResMut<Assets<Mesh>>, | ||
| mut line_materials: ResMut<Assets<LineMaterial>>, | ||
| mut points_materials: ResMut<Assets<PointsMaterial>>, | ||
| mut normal_materials: ResMut<'_, Assets<NormalMaterial>>, | ||
| ) { | ||
| let interpolation_target = vec![ | ||
| Point3::new(-1.0, -1.0, 0.), | ||
| Point3::new(1.0, -1.0, 0.), | ||
| Point3::new(1.0, 1.0, 0.), | ||
| Point3::new(-1.0, 1.0, 0.), | ||
| Point3::new(-1.0, 2.0, 0.), | ||
| Point3::new(1.0, 2.5, 0.), | ||
| ]; | ||
| let interpolated = NurbsCurve3D::<f64>::try_interpolate(&interpolation_target, 3).unwrap(); | ||
|
|
||
| let rotation = Rotation3::from_axis_angle(&Vector3::z_axis(), FRAC_PI_2); | ||
| let translation = Translation3::new(0., 0., 1.5); | ||
| let m = translation * rotation; | ||
| let front = interpolated.transformed(&(translation.inverse()).into()); | ||
| let back = interpolated.transformed(&m.into()); | ||
|
|
||
| let (umin, umax) = front.knots_domain(); | ||
|
|
||
| let surface = NurbsSurface::try_loft(&[front, back], Some(3)).unwrap(); | ||
|
|
||
| let u_parameters = vec![ | ||
| umin, | ||
| (umin + umax) * 0.25, | ||
| (umin + umax) * 0.5, | ||
| (umin + umax) * 0.75, | ||
| umax, | ||
| ]; | ||
| let vmin = surface.v_knots_domain().0; | ||
|
|
||
| let boundary = BoundaryConstraints::default().with_u_parameters_at_v_min(u_parameters.clone()); | ||
|
|
||
| commands.spawn(( | ||
| Mesh3d( | ||
| meshes.add(PointsMesh { | ||
| vertices: u_parameters | ||
| .iter() | ||
| .map(|u| surface.point_at(*u, vmin).cast::<f32>().into()) | ||
| .collect_vec(), | ||
| ..Default::default() | ||
| }), | ||
| ), | ||
| MeshMaterial3d(points_materials.add(PointsMaterial { | ||
| settings: PointsShaderSettings { | ||
| point_size: 0.05, | ||
| color: TOMATO.into(), | ||
| ..Default::default() | ||
| }, | ||
| circle: true, | ||
| ..Default::default() | ||
| })), | ||
| )); | ||
|
|
||
| // let tess = surface.tessellate(Some(Default::default())); | ||
| let option = AdaptiveTessellationOptions { | ||
| ..Default::default() | ||
| }; | ||
| let tess = surface.constrained_tessellate(boundary, Some(option)); | ||
| let tess = tess.cast::<f32>(); | ||
|
|
||
| let vertices = tess.points().iter().map(|pt| (*pt).into()).collect_vec(); | ||
| commands.spawn(( | ||
| Mesh3d(meshes.add(PointsMesh { | ||
| vertices: vertices.clone(), | ||
| ..Default::default() | ||
| })), | ||
| MeshMaterial3d(points_materials.add(PointsMaterial { | ||
| settings: PointsShaderSettings { | ||
| point_size: 0.02, | ||
| color: Color::WHITE.into(), | ||
| ..Default::default() | ||
| }, | ||
| circle: true, | ||
| ..Default::default() | ||
| })), | ||
| )); | ||
|
|
||
| let normals = tess.normals().iter().map(|n| (*n).into()).collect(); | ||
| let uvs = tess.uvs().iter().map(|uv| (*uv).into()).collect(); | ||
| let indices = tess | ||
| .faces() | ||
| .iter() | ||
| .flat_map(|f| f.iter().map(|i| *i as u32)) | ||
| .collect_vec(); | ||
|
|
||
| let mesh = Mesh::new(PrimitiveTopology::LineList, default()).with_inserted_attribute( | ||
| Mesh::ATTRIBUTE_POSITION, | ||
| // triangle edges | ||
| VertexAttributeValues::Float32x3( | ||
| indices | ||
| .chunks(3) | ||
| .flat_map(|idx| { | ||
| [ | ||
| vertices[idx[0] as usize].into(), | ||
| vertices[idx[1] as usize].into(), | ||
| vertices[idx[1] as usize].into(), | ||
| vertices[idx[2] as usize].into(), | ||
| vertices[idx[2] as usize].into(), | ||
| vertices[idx[0] as usize].into(), | ||
| ] | ||
| }) | ||
| .collect_vec(), | ||
| ), | ||
| ); | ||
| commands.spawn(( | ||
| Mesh3d(meshes.add(mesh)), | ||
| MeshMaterial3d(line_materials.add(LineMaterial { | ||
| color: Color::WHITE.into(), | ||
| ..Default::default() | ||
| })), | ||
| )); | ||
|
|
||
| let mesh = Mesh::new(PrimitiveTopology::TriangleList, default()) | ||
| .with_inserted_attribute( | ||
| Mesh::ATTRIBUTE_POSITION, | ||
| VertexAttributeValues::Float32x3(vertices.into_iter().map(|v| v.into()).collect()), | ||
| ) | ||
| .with_inserted_attribute( | ||
| Mesh::ATTRIBUTE_NORMAL, | ||
| VertexAttributeValues::Float32x3(normals), | ||
| ) | ||
| .with_inserted_attribute(Mesh::ATTRIBUTE_UV_0, VertexAttributeValues::Float32x2(uvs)) | ||
| .with_inserted_indices(Indices::U32(indices)); | ||
|
|
||
| commands.spawn(( | ||
| Mesh3d(meshes.add(mesh)), | ||
| MeshMaterial3d(normal_materials.add(NormalMaterial { | ||
| cull_mode: None, | ||
| ..Default::default() | ||
| })), | ||
| )); | ||
|
|
||
| let (umin, umax) = surface.u_knots_domain(); | ||
| let (vmin, vmax) = surface.v_knots_domain(); | ||
| let center = surface | ||
| .point_at((umax + umin) * 0.5, (vmax + vmin) * 0.5) | ||
| .cast::<f32>() | ||
| .into(); | ||
|
|
||
| let scale = 5.; | ||
| commands.spawn(( | ||
| Projection::Orthographic(OrthographicProjection { | ||
| scale, | ||
| near: 1e-1, | ||
| far: 1e4, | ||
| scaling_mode: ScalingMode::FixedVertical { | ||
| viewport_height: 2., | ||
| }, | ||
| ..OrthographicProjection::default_3d() | ||
| }), | ||
| Transform::from_translation(center + Vec3::new(0., 0., 3.)).looking_at(center, Vec3::Y), | ||
| PanOrbitCamera::default(), | ||
| )); | ||
| } |
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