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wip: start brute force closest_fev

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Quaternions 2023-10-29 00:16:07 -07:00
parent dff2648cd3
commit 89f7a2b9b9
1 changed files with 40 additions and 0 deletions
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40
src/model_physics.rs
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@ -52,6 +52,46 @@ pub trait MeshQuery<FACE:Clone,EDGE:Clone,VERT:Clone>{
impl MeshQuery<FaceId,EdgeId,VertId> for PhysicsMesh{
fn closest_fev(&self,point:Planar64Vec3)->FEV<FaceId,EdgeId,VertId>{
//put some genius code right here
//TODO write genius code
//brute force
let mut best_distance_squared=Planar64::MAX;
let mut best_fev:FEV<FaceId,EdgeId,VertId>;
//check each vert
for (i,v) in self.verts.iter().enumerate(){
let d=(v.0-point).dot(v.0-point);
if d<best_distance_squared{
best_distance_squared=d;
best_fev=FEV::<FaceId,EdgeId,VertId>::Vert(VertId(i));
}
}
let face_dots=self.faces.iter().map(|f|f.normal.dot(point));
//check each edge
for (i,v) in self.edge_topology.iter().enumerate(){
let verts=self.edge_verts(EdgeId(i));
if verts.iter().all(|&(vert_id,face_id)|{
let (n,d)=self.face_nd(face_id);
n.dot(point)<d
}){
//this is also wrong
}
let faces=self.edge_faces(EdgeId(i));
//try not to do this
//let edge_dir=self.faces[faces[0].0].normal.cross(self.faces[faces[1].0].normal);
let face_dot=self.faces[faces[0].0].normal.dot(self.faces[faces[1].0].normal);
let edge_face_dots=faces.map(|face_id|{
let (n,d)=self.face_nd(face_id);
n.dot(point)-d
});
//wrong! face normals are not normalized! 1+d will not work!
let edge_distance=(edge_face_dots[0]+edge_face_dots[1])/(Planar64::ONE+face_dot);
//use the face d values and 1+d
if edge_distance*edge_distance<best_distance_squared{
best_distance_squared=edge_distance*edge_distance;
best_fev=FEV::<FaceId,EdgeId,VertId>::Edge(EdgeId(i));
}
}
//check each face
todo!()
}
fn face_nd(&self,face_id:FaceId)->(Planar64Vec3,Planar64){