h3n3/yet-another-cad-viewer
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add working initial bounding box implementation

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Yeicor
2024-02-27 21:17:17 +01:00
parent 57c10db5a0
commit 6df02bd447
5 changed files with 151 additions and 75 deletions
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23
src/misc/scene.ts
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@@ -2,7 +2,7 @@ import {Ref, ShallowRef} from 'vue';
import {Document} from '@gltf-transform/core';
import {extrasNameKey, mergeFinalize, mergePartial, removeModel, toBuffer} from "./gltf";
import {newAxes, newGridBox} from "./helpers";
import {Matrix4, Vector3} from 'three';
import {Box3, Matrix4, Vector3} from 'three';
/** This class helps manage SceneManagerData. All methods are static to support reactivity... */
export class SceneMgr {
@@ -27,6 +27,18 @@ export class SceneMgr {
}
private static async reloadHelpers(sceneUrl: Ref<string>, document: ShallowRef<Document>) {
let bb = SceneMgr.getBoundingBox(document);
// Create the helper axes and grid box
let helpersDoc = new Document();
let transform = (new Matrix4()).makeTranslation(bb.getCenter(new Vector3()));
newAxes(helpersDoc, bb.getSize(new Vector3()).multiplyScalar(0.5), transform);
newGridBox(helpersDoc, bb.getSize(new Vector3()), transform);
let helpersUrl = URL.createObjectURL(new Blob([await toBuffer(helpersDoc)]));
await SceneMgr.loadModel(sceneUrl, document, "__helpers", helpersUrl);
}
static getBoundingBox(document: ShallowRef<Document>): Box3 {
// Get bounding box of the model and use it to set the size of the helpers
let bbMin: number[] = [1e6, 1e6, 1e6];
let bbMax: number[] = [-1e6, -1e6, -1e6];
@@ -46,14 +58,7 @@ export class SceneMgr {
});
let bbSize = new Vector3().fromArray(bbMax).sub(new Vector3().fromArray(bbMin));
let bbCenter = new Vector3().fromArray(bbMin).add(bbSize.clone().multiplyScalar(0.5));
let bbTransform = new Matrix4().makeTranslation(bbCenter.x, bbCenter.y, bbCenter.z);
// Create the helper axes and grid box
let helpersDoc = new Document();
newAxes(helpersDoc, bbSize.clone().multiplyScalar(0.5), bbTransform);
newGridBox(helpersDoc, bbSize, bbTransform);
let helpersUrl = URL.createObjectURL(new Blob([await toBuffer(helpersDoc)]));
await SceneMgr.loadModel(sceneUrl, document, "__helpers", helpersUrl);
return new Box3().setFromCenterAndSize(bbCenter, bbSize);
}
/** Removes a model from the viewer */