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refactor box3expand

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This commit is contained in:
Stewart Allen 2022-01-05 00:15:44 -05:00
commit 4916a055eb
1 changed files with 6 additions and 44 deletions
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50
src/mesh/api.js
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@ -330,11 +330,14 @@ let util = mesh.util = {
// bounding box workaround adapted from: // bounding box workaround adapted from:
// https://discourse.threejs.org/t/bounding-box-bigger-than-concave-object-extrudegeometry/26073/2 // https://discourse.threejs.org/t/bounding-box-bigger-than-concave-object-extrudegeometry/26073/2
box3expand(box3, object) { box3expand(box3, object) {
const geometry = object.geometry; let geometry = object.geometry;
object.updateWorldMatrix(geometry ? true : false, false); object.updateWorldMatrix(geometry ? true : false, false);
if (geometry) { if (geometry) {
let bounds = util.geoBounds(geometry, object.matrixWorld); let matrix = object.matrixWorld;
let position = geometry.attributes.position.clone();
position.applyMatrix4(new THREE.Matrix4().extractRotation(matrix));
let bounds = new THREE.Box3().setFromBufferAttribute(position);
let bt = new THREE.Box3().copy(bounds); let bt = new THREE.Box3().copy(bounds);
let m4 = new THREE.Matrix4(); let m4 = new THREE.Matrix4();
m4.setPosition(new THREE.Vector3().setFromMatrixPosition(object.matrixWorld)); m4.setPosition(new THREE.Vector3().setFromMatrixPosition(object.matrixWorld));
@ -342,53 +345,12 @@ let util = mesh.util = {
box3.union(bt); box3.union(bt);
} }
const children = object.children; let children = object.children;
for (let i = 0, l = children.length; i < l; i++) { for (let i = 0, l = children.length; i < l; i++) {
util.box3expand(box3, children[i]); util.box3expand(box3, children[i]);
} }
}, },
// second half of bound box workaround (see above)
// todo: cache, distribute in workers, or other mem/cpu optimization
geoBounds(geometry, matrix) {
const boundingBox = new THREE.Box3();
const position = geometry.attributes.position.clone();
if (matrix) {
position.applyMatrix4(new THREE.Matrix4().extractRotation(matrix));
}
if (position.isGLBufferAttribute) {
console.error('THREE.BufferGeometry.computeBoundingBox(): GLBufferAttribute requires a manual bounding box. Alternatively set "mesh.frustumCulled" to "false".', geometry);
}
boundingBox.setFromBufferAttribute(position);
const morphAttributesPosition = geometry.morphAttributes.position;
if (morphAttributesPosition) {
for (let i = 0, il = morphAttributesPosition.length; i < il; i++) {
const box3 = new THREE.Box3().setFromBufferAttribute(morphAttributesPosition[i]);
if (geometry.morphTargetsRelative) {
let vector = new THREE.Vector3();
vector.addVectors(boundingBox.min, box3.min);
boundingBox.expandByPoint(vector);
vector.addVectors(boundingBox.max, box3.max);
boundingBox.expandByPoint(vector);
} else {
boundingBox.expandByPoint(box3.min);
boundingBox.expandByPoint(box3.max);
}
}
}
if (isNaN(boundingBox.min.x) || isNaN(boundingBox.min.y) || isNaN(boundingBox.min.z)) {
console.error('THREE.BufferGeometry.computeBoundingBox(): Computed min/max have NaN values. The "position" attribute is likely to have NaN values.', geometry);
}
return boundingBox;
}
}; };
let broker = gapp.broker; let broker = gapp.broker;