@three.ez/batched-mesh-extensions/src/core/feature/GetPositionAt.js

Utility extension methods for BatchedMesh

import { Vector3 } from 'three';
const _position = new Vector3();
export function getPositionAt(index, target = _position) {
    const offset = index * 16;
    const array = this._matricesTexture.image.data;
    target.x = array[offset + 12];
    target.y = array[offset + 13];
    target.z = array[offset + 14];
    return target;
}
export function getPositionAndMaxScaleOnAxisAt(index, position) {
    const offset = index * 16;
    const array = this._matricesTexture.image.data;
    const te0 = array[offset + 0];
    const te1 = array[offset + 1];
    const te2 = array[offset + 2];
    const scaleXSq = te0 * te0 + te1 * te1 + te2 * te2;
    const te4 = array[offset + 4];
    const te5 = array[offset + 5];
    const te6 = array[offset + 6];
    const scaleYSq = te4 * te4 + te5 * te5 + te6 * te6;
    const te8 = array[offset + 8];
    const te9 = array[offset + 9];
    const te10 = array[offset + 10];
    const scaleZSq = te8 * te8 + te9 * te9 + te10 * te10;
    position.x = array[offset + 12];
    position.y = array[offset + 13];
    position.z = array[offset + 14];
    return Math.sqrt(Math.max(scaleXSq, scaleYSq, scaleZSq));
}
export function applyMatrixAtToSphere(index, sphere, center, radius) {
    const offset = index * 16;
    const array = this._matricesTexture.image.data;
    const te0 = array[offset + 0];
    const te1 = array[offset + 1];
    const te2 = array[offset + 2];
    const te3 = array[offset + 3];
    const te4 = array[offset + 4];
    const te5 = array[offset + 5];
    const te6 = array[offset + 6];
    const te7 = array[offset + 7];
    const te8 = array[offset + 8];
    const te9 = array[offset + 9];
    const te10 = array[offset + 10];
    const te11 = array[offset + 11];
    const te12 = array[offset + 12];
    const te13 = array[offset + 13];
    const te14 = array[offset + 14];
    const te15 = array[offset + 15];
    const position = sphere.center;
    const x = center.x;
    const y = center.y;
    const z = center.z;
    const w = 1 / (te3 * x + te7 * y + te11 * z + te15);
    position.x = (te0 * x + te4 * y + te8 * z + te12) * w;
    position.y = (te1 * x + te5 * y + te9 * z + te13) * w;
    position.z = (te2 * x + te6 * y + te10 * z + te14) * w;
    const scaleXSq = te0 * te0 + te1 * te1 + te2 * te2;
    const scaleYSq = te4 * te4 + te5 * te5 + te6 * te6;
    const scaleZSq = te8 * te8 + te9 * te9 + te10 * te10;
    sphere.radius = radius * Math.sqrt(Math.max(scaleXSq, scaleYSq, scaleZSq));
}
//# sourceMappingURL=GetPositionAt.js.map