AI_Assistant/grid-apps-cmms
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translate point into mesh geometry space

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This commit is contained in:
Stewart Allen 2022-01-13 00:45:20 -05:00
commit 2a64dee448
2 changed files with 21 additions and 7 deletions
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1
src/main/mesh.js
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@ -260,6 +260,7 @@ function space_init(data) {
if (shiftKey && metaKey) {
// find faces adjacent to point/line clicked
model.select(int.point, int.face);
// console.log(int);
} else if (metaKey) {
// set focus on intersected face
let { x, y, z } = int.point;

27
src/mesh/work.js
View file

@ -103,28 +103,41 @@ let model = {
// given model and point, locate matching vertices, lines, and faces
select(data) {
let { id, x, y, z, a, b, c, matrix } = data;
let arr = translate_encode(id, matrix);
let eps = 2;
// translate point into mesh matrix space
let v3 = new Vector3(x,y,z).applyMatrix4(
core_matrix.clone().multiply(new Matrix4().fromArray(matrix)).invert()
);
x = v3.x; y = v3.y; z = v3.z;
let arr = cache[id].geo.attributes.position.array;
// distance tolerance for click to vertex (rough distance)
let eps = 1;
let faces = [];
for (let i=0, l=arr.length; i<l; ) {
// matches here are within radius of a vertex
// select all faces that share a matched vertex
let face = (i/9) | 0;
let face = (i/9) | 0; // face index
let ax = arr[i++];
let ay = arr[i++];
let az = arr[i++];
let dx = Math.abs(ax - x);
let dy = Math.abs(ay - y);
let dz = Math.abs(az - z);
if (dz < eps && dy < eps && dz < eps) {
if (dx < eps && dy < eps && dz < eps) {
faces.addOnce(face);
console.log(`match @ ${i-3} = ${face}`, ax, ay, az);
}
}
// no matches and we look at the line segments from the provided face
// to see if x,y,z point was on or near that line. then select the
// two faces shared by that line
// ---
// if no lines match, select the provided face only
return {};
if (faces.length === 0) {
// todo or not todo
}
// if no lines match, select the provided face (from min vertex index)
if (faces.length === 0) {
faces.push(Math.min(a,b,c) / 3);
}
return faces;
}
};