add an example for intersection plane #249
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sebcrozet
approved these changes
Aug 2, 2024
Vrixyz
commented
Aug 5, 2024
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| fn mquad_mesh_from_points(trimesh: &(Vec<Point3<Real>>, Vec<[u32; 3]>), camera_pos: Vec3) -> Mesh { | ||
| let (points, indices) = trimesh; | ||
| // Transform the parry mesh into a mquad Mesh | ||
| let (mquad_points, mquad_indices) = ( | ||
| points | ||
| .iter() | ||
| .map(|p| Vertex { | ||
| position: mquad_from_na(*p), | ||
| uv: Vec2::new(p.x, p.y), | ||
| color: DARKGRAY, | ||
| }) | ||
| .collect(), | ||
| indices.iter().flatten().map(|v| *v as u16).collect(), | ||
| ); | ||
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| // Macroquad doesn´t support adding normals to vertices, so we'll bake a color into these vertices. | ||
| // See https://github.com/not-fl3/macroquad/issues/321. | ||
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| // Compute the normal of each vertex, making them unique | ||
| let vertices: Vec<Vertex> = mquad_compute_normals(&mquad_points, &mquad_indices, camera_pos); | ||
| // Regenerate the index for each vertex. | ||
| let indices: Vec<u16> = (0..vertices.len() * 3) | ||
| .into_iter() | ||
| .map(|i| i as u16) | ||
| .collect(); | ||
| let mesh = Mesh { | ||
| vertices, | ||
| indices, | ||
| texture: None, | ||
| }; | ||
| mesh | ||
| } | ||
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| fn mquad_compute_normals(points: &Vec<Vertex>, indices: &Vec<u16>, cam_pos: Vec3) -> Vec<Vertex> { | ||
| let mut vertices: Vec<Vertex> = Vec::<Vertex>::new(); | ||
| for indices in indices.chunks(3) { | ||
| let v0 = &points[indices[0] as usize]; | ||
| let v1 = &points[indices[1] as usize]; | ||
| let v2 = &points[indices[2] as usize]; | ||
| let normal = (v0.position - v2.position) | ||
| .cross(v1.position - v2.position) | ||
| .normalize(); | ||
| let brightness_mod = 0.2 + (0.8 / 2.) * (normal.dot(cam_pos) + 1.); | ||
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| for &i in indices.iter() { | ||
| let mut color = points[i as usize].color; | ||
| color.r *= brightness_mod; | ||
| color.g *= brightness_mod; | ||
| color.b *= brightness_mod; | ||
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| vertices.push(Vertex { | ||
| position: points[i as usize].position, | ||
| uv: Vec2::ZERO, | ||
| color: color, | ||
| }); | ||
| } | ||
| } | ||
| vertices | ||
| } |
There was a problem hiding this comment.
all this is lengthy, but unfortunately there's not much way around it (see not-fl3/macroquad#321); it would be good to settle on a "common" library for all examples, but as it's the first 3d example this might be ok to keep it here, and we'll move it out with the next example, probably #250
sebcrozet
approved these changes
Aug 9, 2024
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| #[macroquad::main("parry3d::query::PlaneIntersection")] | ||
| async fn main() { | ||
| let trimesh = Cuboid::new(Vector3::new(1.0, 1.0, 1.0)).to_trimesh(); |
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Suggested change
| let trimesh = Cuboid::new(Vector3::new(1.0, 1.0, 1.0)).to_trimesh(); | |
| let trimesh = Cuboid::new(Vector3::repeat(1.0)).to_trimesh(); |
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| // Get the intersection polyline. | ||
| let intersection_result = trimesh.intersection_with_local_plane( | ||
| &UnitVector3::new_normalize(Vector3::<Real>::new( |
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Is the type parameter annotation really necessary?
Suggested change
| &UnitVector3::new_normalize(Vector3::<Real>::new( | |
| &UnitVector3::new_normalize(Vector3::new( |
|
Interesting CI failure. Hopefully now that |
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intersection_with_local_plane#248Screencast.from.08-05-2024.06.05.14.PM.webm